制作头像上传。请依据您的实际需求。改动代码，不全然正确。仅供參考！
前端页面设计使用bootstrap ，头像预览和剪裁工具使用cropper
后台使用springmvc。
如今来看前端的页面设计
前端页面设计，自然须要bootstrap 、jqury 和cropper ，这能够自行去网上百度查找
剪裁效果图
html 文件
cropper 提示：点击头像上传
js处理文件例如以下
main,js
$(function () { 'use strict'; var console = window.console || { log: function () {} }; var $image = $('#image'); var $download = $('#download'); var $dataX = $('#dataX'); var $dataY = $('#dataY'); var $dataHeight = $('#dataHeight'); var $dataWidth = $('#dataWidth'); var $dataRotate = $('#dataRotate'); var $dataScaleX = $('#dataScaleX'); var $dataScaleY = $('#dataScaleY'); var options = { aspectRatio: 16 / 9, preview: '.img-preview', crop: function (e) { $dataX.val(Math.round(e.x)); $dataY.val(Math.round(e.y)); $dataHeight.val(Math.round(e.height)); $dataWidth.val(Math.round(e.width)); $dataRotate.val(e.rotate); $dataScaleX.val(e.scaleX); $dataScaleY.val(e.scaleY); } }; // Tooltip $('[data-toggle="tooltip"]').tooltip(); // Cropper $image.on({ 'build.cropper': function (e) { console.log(e.type); }, 'built.cropper': function (e) { console.log(e.type); }, 'cropstart.cropper': function (e) { console.log(e.type, e.action); }, 'cropmove.cropper': function (e) { console.log(e.type, e.action); }, 'cropend.cropper': function (e) { console.log(e.type, e.action); }, 'crop.cropper': function (e) { console.log(e.type, e.x, e.y, e.width, e.height, e.rotate, e.scaleX, e.scaleY); }, 'zoom.cropper': function (e) { console.log(e.type, e.ratio); } }).cropper(options); // Buttons if (!$.isFunction(document.createElement('canvas').getContext)) { $('button[data-method="getCroppedCanvas"]').prop('disabled', true); } if (typeof document.createElement('cropper').style.transition === 'undefined') { $('button[data-method="rotate"]').prop('disabled', true); $('button[data-method="scale"]').prop('disabled', true); } // Download if (typeof $download[0].download === 'undefined') { $download.addClass('disabled'); } // Options $('.docs-toggles').on('change', 'input', function () { var $this = $(this); var name = $this.attr('name'); var type = $this.prop('type'); var cropBoxData; var canvasData; if (!$image.data('cropper')) { return; } if (type === 'checkbox') { options[name] = $this.prop('checked'); cropBoxData = $image.cropper('getCropBoxData'); canvasData = $image.cropper('getCanvasData'); options.built = function () { $image.cropper('setCropBoxData', cropBoxData); $image.cropper('setCanvasData', canvasData); }; } else if (type === 'radio') { options[name] = $this.val(); } $image.cropper('destroy').cropper(options); }); // Methods $('.docs-buttons').on('click', '[data-method]', function () { var $this = $(this); var data = $this.data(); var $target; var result; if ($this.prop('disabled') || $this.hasClass('disabled')) { return; } if ($image.data('cropper') && data.method) { data = $.extend({}, data); // Clone a new one if (typeof data.target !== 'undefined') { $target = $(data.target); if (typeof data.option === 'undefined') { try { data.option = JSON.parse($target.val()); } catch (e) { console.log(e.message); } } } result = $image.cropper(data.method, data.option, data.secondOption); switch (data.method) { case 'scaleX': case 'scaleY': $(this).data('option', -data.option); break; case 'getCroppedCanvas': if (result) { // Bootstrap's Modal $('#getCroppedCanvasModal').modal().find('.modal-body').html(result); if (!$download.hasClass('disabled')) { $download.attr('href', result.toDataURL('image/jpeg')); } } break; } if ($.isPlainObject(result) && $target) { try { $target.val(JSON.stringify(result)); } catch (e) { console.log(e.message); } } } }); // Keyboard $(document.body).on('keydown', function (e) { if (!$image.data('cropper') || this.scrollTop > 300) { return; } switch (e.which) { case 37: e.preventDefault(); $image.cropper('move', -1, 0); break; case 38: e.preventDefault(); $image.cropper('move', 0, -1); break; case 39: e.preventDefault(); $image.cropper('move', 1, 0); break; case 40: e.preventDefault(); $image.cropper('move', 0, 1); break; } }); // Import image var $inputImage = $('#inputImage'); var URL = window.URL || window.webkitURL; var blobURL; if (URL) { $inputImage.change(function () { var files = this.files; var file; if (!$image.data('cropper')) { return; } if (files && files.length) { file = files[0]; if (/^image\/\w+$/.test(file.type)) { blobURL = URL.createObjectURL(file); $image.one('built.cropper', function () { // Revoke when load complete URL.revokeObjectURL(blobURL); }).cropper('reset').cropper('replace', blobURL); $inputImage.val(''); } else { window.alert('Please choose an image file.'); } } }); } else { $inputImage.prop('disabled', true).parent().addClass('disabled'); }}); 须要加入的css样式 style.css
.avatar-view { display: block; margin: 0 auto; height: 220px; width: 220px; border: 3px solid #fff; border-radius: 5px; box-shadow: 0 0 5px rgba(0,0,0,.15); cursor: pointer; overflow: hidden;}.avatar-view img { width: 100%;}.avatar-body { padding-right: 15px; padding-left: 15px;}.avatar-upload { overflow: hidden;}.avatar-upload label { display: block; float: left; clear: left; width: 100px;}.avatar-upload input { display: block; margin-left: 110px;}.avater-alert { margin-top: 10px; margin-bottom: 10px;}.avatar-wrapper { height: 364px; width: 100%; margin-top: 15px; box-shadow: inset 0 0 5px rgba(0,0,0,.25); background-color: #fcfcfc; overflow: hidden;}.avatar-wrapper img { display: block; height: auto; max-width: 100%;}.avatar-preview { float: left; margin-top: 15px; margin-right: 15px; border: 1px solid #eee; border-radius: 4px; background-color: #fff; overflow: hidden;}.avatar-preview:hover { border-color: #ccf; box-shadow: 0 0 5px rgba(0,0,0,.15);}.avatar-preview img { width: 100%;}.preview-lg { height: 200px; width: 200px; margin-top: 15px;}.preview-md { height: 100px; width: 100px;}.preview-sm { height: 50px; width: 50px;}.preview-xs{ height:30px; width:30px;]}@media (min-width: 992px) { .avatar-preview { float: none; }}.avatar-btns { margin-top: 30px; margin-bottom: 15px;}.avatar-btns .btn-group { margin-right: 5px;}.loading { display: none; position: absolute; top: 0; right: 0; bottom: 0; left: 0; background: #fff url("patterns/loading.gif") no-repeat center center; opacity: .75; filter: alpha(opacity=75); z-index: 20140628;} 如今前端的基本完毕。如今最重要的来了。就是后台java 处理了。 在网上找过非常多，发现没有，关于springmvc的，上面的内容基本上在网上找到，以下的springmvc的。关于图像处理的。就是我个人做的。好像网上有直接在前端进行剪裁的，可惜我不会啊，所以我还是老老实实的在后台处理了。
package com.cx.wxs.action.image;import java.io.File;import java.sql.Timestamp;import java.util.Date;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import com.cx.wxs.dto.BSiteDto;import com.cx.wxs.dto.IAlbumDto;import com.cx.wxs.dto.IImageDto;import com.cx.wxs.dto.UUserDto;import com.cx.wxs.service.BSiteService;import com.cx.wxs.service.IImageService;import com.cx.wxs.service.UUserService;import com.cx.wxs.utils.DateUtils;import com.cx.wxs.utils.clientInfo;import com.cx.wxs.utils.imageUtils;/** * @author roychenyi * @date 2016-3-29 下午9:22:01 */@Controller@RequestMapping("/{vip}/image")public class imageAction { @Resource private IImageService iImageService; @Resource private BSiteService bSiteService; @Resource private UUserService uUserService; /** * @return the bSiteService */ public BSiteService getbSiteService() { return bSiteService; } /** * @param bSiteService the bSiteService to set */ public void setbSiteService(BSiteService bSiteService) { this.bSiteService = bSiteService; } /** * @return the uUserService */ public UUserService getuUserService() { return uUserService; } /** * @param uUserService the uUserService to set */ public void setuUserService(UUserService uUserService) { this.uUserService = uUserService; } /** * @return the iImageService */ public IImageService getiImageService() { return iImageService; } /** * @param iImageService the iImageService to set */ public void setiImageService(IImageService iImageService) { this.iImageService = iImageService; } @RequestMapping(value="/updateuserlogo") @ResponseBody public IImageDto updateUserLogo( @PathVariable("vip") String vip, Integer x, Integer y, Integer width, Integer height,Integer degree, @RequestParam(value = "avatar_file") MultipartFile imageFile, HttpServletRequest request,HttpServletResponse response){ IImageDto imageDto=new IImageDto(); //获取server的实际路径 String realPath = request.getSession().getServletContext().getRealPath("/"); System.out.println("x:"+x+"y:"+y+"width:"+width+"height:"+height+"degree:"+degree); System.out.println(realPath); //须要上传的路径，我的路径依据用户的和当前日期划分路径 String resourcePath="upload/image"; UUserDto userDto=(UUserDto) request.getSession().getAttribute("user"); resourcePath+="/"+userDto.getUserId(); if(imageFile!=null){ try{ //文件名称 String name= imageFile.getOriginalFilename(); //获取时间的路径 Date date=new Date(); int year=DateUtils.getYear(date); int month=DateUtils.getMonth(date); int day=DateUtils.getDay(date); resourcePath+="/"+year+"/"+month+"/"+day+"/"; File dir=new File(realPath+resourcePath); if(!dir.exists()){ dir.mkdirs(); } //先把用户上传到原图保存到server上 File file=new File(dir,date.getTime()+".jpg"); imageFile.transferTo(file); if(file.exists()){ String src=realPath+resourcePath+date.getTime(); boolean[] flag=new boolean[6]; //旋转后剪裁图片 flag[0]=imageUtils.cutAndRotateImage(src+".jpg", src+"_s.jpg", x, y, width, height, degree); //缩放图片,生成不同大小的图片。应用于不同的大小的头像显示 flag[1]= imageUtils.scale2(src+"_s.jpg", src+"_s_200.jpg", 200, 200, true); flag[2]= imageUtils.scale2(src+"_s.jpg", src+"_s_100.jpg", 100, 100, true); flag[3]= imageUtils.scale2(src+"_s.jpg", src+"_s_50.jpg", 50, 50, true); flag[4]= imageUtils.scale2(src+"_s.jpg", src+"_s_30.jpg", 30, 30, true); flag[5]= imageUtils.scale2(file.getPath(), src+"_200.jpg", 200, 200, true); if(flag[0]&&flag[1]&&flag[2]&&flag[3]&&flag[4]&&flag[5]){ //图像处理完毕。将数据写入数据库中 imageDto.setYear((short) year); imageDto.setMount((short)month); imageDto.setDay((short)day); imageDto.setUUserDto(userDto); imageDto.setName(date.getTime()+".jpg"); imageDto.setFileName(name); imageDto.setUrl(resourcePath+"/"+date.getTime()+".jpg"); imageDto.setPreviewUrl(resourcePath+"/"+date.getTime()+"_200.jpg"); imageDto.setTime(new Timestamp(date.getTime())); imageDto.setWidth((short)imageUtils.getImageWidth(file.getPath())); imageDto.setHeight((short)imageUtils.getImageHeight(file.getPath())); imageDto.setClientIp(clientInfo.getIpAddr(request)); imageDto.setClientAgent(clientInfo.getAgent(request)); imageDto.setClientType((short)(clientInfo.isMoblie(request)?1:0)); imageDto.setStatus((short)1); imageDto.setExt3(resourcePath+"/"+date.getTime()+"_s_200.jpg"); imageDto.setExt4(resourcePath+"/"+date.getTime()+"_s_100.jpg"); //设置相冊，头像设置进入默认相冊 IAlbumDto albumDto=new IAlbumDto(); albumDto.setAlbumId(1); imageDto.setIAlbumDto(albumDto); int id= iImageService.addIImage(imageDto); if(id>0){ BSiteDto siteDto=userDto.getBSiteDto(); siteDto.setLogo(resourcePath+"/"+date.getTime()+"_s_100.jpg"); siteDto.setLastTime( new Timestamp(date.getTime())); bSiteService.updateBSite(siteDto); userDto.setPortrait(resourcePath+"/"+date.getTime()+"_s_30.jpg"); uUserService.updateUuser(userDto); userDto=uUserService.getUuser(userDto); imageDto.setLoginFlag("1"); return imageDto; } } } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); return imageDto; } } return imageDto; }} 以下是图像处理的工具类。imageUtils.java.欢迎借鉴引用。（我也是在我网上找了非常多进行參考的）
package com.cx.wxs.utils;import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Dimension;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Rectangle;import java.awt.RenderingHints;import java.awt.color.ColorSpace;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;import java.awt.image.BufferedImage;import java.awt.image.ColorConvertOp;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.sql.Timestamp;import java.util.Date;import java.util.HashMap;import java.util.Iterator;import javax.imageio.ImageIO;import javax.imageio.ImageReadParam;import javax.imageio.ImageReader;import javax.imageio.stream.ImageInputStream;import javax.imageio.stream.ImageOutputStream;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import com.cx.wxs.dto.IImageDto;/** * @author roychenyi * @date 2016-3-30 上午10:11:39 */public class imageUtils { private static Log log = LogFactory.getLog(imageUtils.class); /*** * 获取图片的类型 * @param o * @return * @date 2016-3-30下午4:59:36 */ private static String getFormatName(Object o) { try { ImageInputStream iis = ImageIO.createImageInputStream(o); Iterator iter = ImageIO.getImageReaders(iis); if (!iter.hasNext()) { return null; } ImageReader reader = iter.next(); iis.close(); return reader.getFormatName(); } catch (IOException e) { } return null; } /** * 使用ImageReader获取图片尺寸 * * @param src * 源图片路径 */ public void getImageSizeByImageReader(String src) { long beginTime = new Date().getTime(); File file = new File(src); try { Iterator readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); System.out.println("width:" + reader.getWidth(0)); System.out.println("height:" + reader.getHeight(0)); } catch (IOException e) { e.printStackTrace(); } long endTime = new Date().getTime(); System.out.println("使用[ImageReader]获取图片尺寸耗时：[" + (endTime - beginTime)+"]ms"); } /** * 使用BufferedImage获取图片尺寸 * * @param src * 源图片路径 */ public void getImageSizeByBufferedImage(String src) { long beginTime = new Date().getTime(); File file = new File(src); FileInputStream is = null; try { is = new FileInputStream(file); } catch (FileNotFoundException e2) { e2.printStackTrace(); } BufferedImage sourceImg = null; try { sourceImg = javax.imageio.ImageIO.read(is); System.out.println("width:" + sourceImg.getWidth()); System.out.println("height:" + sourceImg.getHeight()); } catch (IOException e1) { e1.printStackTrace(); } long endTime = new Date().getTime(); System.out.println("使用[BufferedImage]获取图片尺寸耗时：[" + (endTime - beginTime)+"]ms"); } /*** * 获取图片的宽 * @param srcImageFile * @return * @date 2016-3-30下午9:01:08 */ public static int getImageWidth(String srcImageFile){ try { File file = new File(srcImageFile); Iterator readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); return reader.getWidth(0); } catch (IOException e) { e.printStackTrace(); return 0; } } /*** * 获取文件的高 * @param srcImageFile * @return * @date 2016-3-30下午9:02:19 */ public static int getImageHeight(String srcImageFile){ File file = new File(srcImageFile); try { Iterator readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); return reader.getHeight(0); } catch (IOException e) { e.printStackTrace(); return 0; } } /*** * 剪裁图片 * @param src * @param dest * @param x 起点横坐标 * @param y 纵坐标 * @param w 长 * @param h 高 * @throws IOException * @date 2016-3-30下午12:19:10 */ public static boolean cutImage(String src,String dest,int x,int y,int w,int h) { try{ Iterator iterator = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader)iterator.next(); InputStream in=new FileInputStream(src); ImageInputStream iis = ImageIO.createImageInputStream(in); reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam(); x=(x>0? x:0); y=(y>0?
y:0); Rectangle rect = new Rectangle(x, y, w,h); param.setSourceRegion(rect); BufferedImage bi = reader.read(0,param); ImageIO.write(bi, "jpg", new File(dest)); return true; }catch (Exception e) { // TODO: handle exception e.printStackTrace(); return false; } } /*** * 图片旋转指定角度 * @param bufferedimage 图像 * @param degree 角度 * @return * @date 2016-3-30下午3:10:27 */ public static BufferedImage rotateImage(final BufferedImage bufferedimage, final int degree) { int w = bufferedimage.getWidth(); int h = bufferedimage.getHeight(); int type = bufferedimage.getColorModel().getTransparency(); BufferedImage img; Graphics2D graphics2d; (graphics2d = (img = new BufferedImage(w, h, type)) .createGraphics()).setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); // graphics2d.setBackground(Color.white); graphics2d.setPaint(Color.WHITE); graphics2d.fillRect(0, 0, w, h); graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2); graphics2d.drawImage(bufferedimage, 0, 0,Color.WHITE, null); graphics2d.dispose(); return img; } public static boolean rotateImage(String srcImageFile, String result, int degree){ try{ BufferedImage src = ImageIO.read(new File(srcImageFile)); // 读入文件 BufferedImage tag= rotateImage(src, degree); ImageIO.write(tag, "JPEG", new File(result)); return true; }catch (Exception e) { // TODO: handle exception return false; } } public static BufferedImage Rotate(Image src, int angel) { int src_width = src.getWidth(null); int src_height = src.getHeight(null); // angel=angel>0?
angel:(360-angel); // calculate the new image size Rectangle rect_des = CalcRotatedSize(new Rectangle(new Dimension( src_width, src_height)), angel); BufferedImage res = null; res = new BufferedImage(rect_des.width, rect_des.height, BufferedImage.TYPE_INT_RGB); Graphics2D g2 = res.createGraphics(); g2.setPaint(Color.WHITE); g2.fillRect(0, 0, rect_des.width, rect_des.height); // transform g2.translate((rect_des.width - src_width) / 2, (rect_des.height - src_height) / 2); g2.rotate(Math.toRadians(angel), src_width / 2, src_height / 2); g2.drawImage(src, null, null); return res; } public static Rectangle CalcRotatedSize(Rectangle src, int angel) { // if angel is greater than 90 degree, we need to do some conversion if (angel >= 90) { if(angel / 90 % 2 == 1){ int temp = src.height; src.height = src.width; src.width = temp; } angel = angel % 90; } double r = Math.sqrt(src.height * src.height + src.width * src.width) / 2; double len = 2 * Math.sin(Math.toRadians(angel) / 2) * r; double angel_alpha = (Math.PI - Math.toRadians(angel)) / 2; double angel_dalta_width = Math.atan((double) src.height / src.width); double angel_dalta_height = Math.atan((double) src.width / src.height); int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width)); int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height)); int des_width = src.width + len_dalta_width * 2; int des_height = src.height + len_dalta_height * 2; return new java.awt.Rectangle(new Dimension(des_width, des_height)); } public static boolean Rotate(String srcImageFile, String result, int degree){ try{ degree=degree>0?
degree:(360-degree); BufferedImage src = ImageIO.read(new File(srcImageFile)); BufferedImage tag = Rotate(src, degree); ImageIO.write(tag, "JPEG", new File(result)); return true; }catch (Exception e) { // TODO: handle exception e.printStackTrace(); return false; } } public static boolean cutAndRotateImage(String srcImageFile,String dest,int x,int y,int w,int h,int degree){ try{ BufferedImage src = ImageIO.read(new File(srcImageFile)); // 读入文件 BufferedImage tag= Rotate(src, degree); Iterator iterator = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader)iterator.next(); // InputStream in=new FileInputStream(tag); ByteArrayOutputStream bs = new ByteArrayOutputStream(); ImageOutputStream ios = ImageIO.createImageOutputStream(bs); ImageIO.write(tag, "jpg", ios); InputStream in=new ByteArrayInputStream(bs.toByteArray()); ImageInputStream iis=ImageIO.createImageInputStream(in); reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam(); x=(x>0?
x:0); y=(y>0?y:0); Rectangle rect = new Rectangle(x, y, w,h); param.setSourceRegion(rect); BufferedImage bi = reader.read(0,param); ImageIO.write(bi, "jpg", new File(dest)); return true; }catch (Exception e) { // TODO: handle exception return false; } } /*** * 依照比例缩放 * @param srcImageFile * @param result * @param scale 缩放比例 * @param flag 缩放选择:true 放大; false 缩小; * @return * @date 2016-3-30下午2:39:44 */ public static boolean scale(String srcImageFile, String result, int scale, boolean flag) { try { File file = new File(srcImageFile); BufferedImage src = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width = reader.getWidth(0); // 得到源图宽 int height = reader.getHeight(0); // 得到源图长 if (flag) {// 放大 width = width * scale; height = height * scale; } else {// 缩小 width = width / scale; height = height / scale; } Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT); BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(image, 0, 0, null); // 绘制缩小后的图 g.dispose(); ImageIO.write(tag, "jpg", new File(result));// 输出到文件流 return true; } catch (IOException e) { e.printStackTrace(); return false; } } /*** * 缩放图像，依照长宽缩放 * @param srcImageFile * @param result * @param height 变换后的高度 * @param width 变换后的长度 * @param bb 比例不正确称时。是否补白。true 补白;false 不补白 * @return * @date 2016-3-30下午2:44:37 */ public static boolean scale2(String srcImageFile, String result, int height, int width, boolean bb) { try { double ratio = 0.0; // 缩放比例 File file = new File(srcImageFile); BufferedImage bi = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width1 = reader.getWidth(0); // 得到源图宽 int height1 = reader.getHeight(0); // 得到源图长 Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH); // 计算比例 if ((height1 > height) || (width1 > width)) { if (height1 > width1) { ratio = (new Integer(height)).doubleValue() / height1; } else { ratio = (new Integer(width)).doubleValue() / width1; } AffineTransformOp op = new AffineTransformOp(AffineTransform .getScaleInstance(ratio, ratio), null); itemp = op.filter(bi, null); } if (bb) {//补白 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.setColor(Color.white); g.fillRect(0, 0, width, height); if (width == itemp.getWidth(null)) g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); else g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); g.dispose(); itemp = image; } ImageIO.write((BufferedImage) itemp, "JPEG", new File(result)); return true; } catch (IOException e) { e.printStackTrace(); return false; } } /*** * 转换图像格式 * @param srcImageFile 原图像地址 * @param formatName 转换类型 * @param destImageFile 转换后的地址 * @return * @author roychenyi * @date 2016-3-30下午2:49:15 */ public static boolean convert(String srcImageFile, String formatName, String destImageFile) { try { File f = new File(srcImageFile); f.canRead(); f.canWrite(); BufferedImage src = ImageIO.read(f); ImageIO.write(src, formatName, new File(destImageFile)); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * 彩色转为黑白 * @param srcImageFile 源图像地址 * @param destImageFile 目标图像地址 */ public final static void gray(String srcImageFile, String destImageFile) { try { BufferedImage src = ImageIO.read(new File(srcImageFile)); ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY); ColorConvertOp op = new ColorConvertOp(cs, null); src = op.filter(src, null); ImageIO.write(src, "jpg", new File(destImageFile)); } catch (IOException e) { e.printStackTrace(); } } /** * 给图片加入图片水印 * @param pressImg 水印图片 * @param srcImageFile 源图像地址 * @param destImageFile 目标图像地址 * @param x 修正值。 默认在中间 * @param y 修正值。 默认在中间 * @param alpha 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包括边界值）的一个浮点数字 */ public static boolean pressImage(String pressImg, String srcImageFile,String destImageFile, int x, int y, float alpha) { try { File file = new File(srcImageFile); BufferedImage src = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width = reader.getWidth(0); // 得到源图宽 int height = reader.getHeight(0); // 得到源图长 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.drawImage(src, 0, 0, width, height, null); // 水印文件 Image src_biao = ImageIO.read(new File(pressImg)); int wideth_biao = src_biao.getWidth(null); int height_biao = src_biao.getHeight(null); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); g.drawImage(src_biao, (width-wideth_biao-x) , (height-height_biao-y) , wideth_biao, height_biao, null); // 水印文件结束 g.dispose(); ImageIO.write((BufferedImage) image, "jpg", new File(destImageFile)); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * 给图片加入文字水印 * @param pressText 水印文字 * @param srcImageFile 源图像地址 * @param destImageFile 目标图像地址 * @param fontName 水印的字体名称 * @param fontStyle 水印的字体样式 * @param color 水印的字体颜色 * @param fontSize 水印的字体大小 * @param x 修正值 * @param y 修正值 * @param alpha 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包括边界值）的一个浮点数字 */ public static boolean pressText(String pressText, String srcImageFile, String destImageFile, String fontName, int fontStyle, Color color, int fontSize,int x, int y, float alpha) { try { File file = new File(srcImageFile); BufferedImage src = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width = reader.getWidth(0); // 得到源图宽 int height = reader.getHeight(0); // 得到源图长 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.drawImage(src, 0, 0, width, height, null); g.setColor(color); g.setFont(new Font(fontName, fontStyle, fontSize)); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); // 在指定坐标绘制水印文字 g.drawString(pressText, (width - (getLength(pressText) * fontSize)) / 2 + x, (height - fontSize) / 2 + y); g.dispose(); ImageIO.write(image, "jpg", new File(destImageFile));// 输出到文件流 return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * 计算text的长度（一个中文算两个字符） * @param text * @return */ public static int getLength(String text) { int length = 0; for (int i = 0; i < text.length(); i++) { if (new String(text.charAt(i) + "").getBytes().length > 1) { length += 2; } else { length += 1; } } return length / 2; } public static void main(String[] args) { String src="D:/0.jpg"; /* imageUtils.cutImage(src, "D://1cut.jpg", -10, 40, 100000, 560); imageUtils.rotateImage(src, "D:/2rotate.jpg", -30); imageUtils.rotateImage(src, "D:/2rotate1.png", 30); imageUtils.Rotate(src, "D://2rotate2.jpg", 330); imageUtils.Rotate(src,"D://2rotate21.jpg",30); imageUtils.cutAndRotateImage(src, "D://9cutRotate1.jpg", 244, 427, 614, 614, 0); imageUtils.scale(src, "D://3scale1.jpg", 3, false); imageUtils.scale2(src, "D://4scale2.jpg", 780,560, false); imageUtils.convert(src, "png", "D://5convert.png"); imageUtils.gray(src,"D://6gray.jpg"); imageUtils.pressImage("D://3scale1.jpg", src, "D://7pressImage.jpg", 100, 100, 0.9f); imageUtils.pressText("图片1414", src, "D://8pressText.jpg", "宋体", Font.BOLD, Color.black, 80, 10, 10,0.6f); */ imageUtils util = new imageUtils(); util.getImageSizeByImageReader(src); util.getImageSizeByBufferedImage(src); System.out.println(getImageHeight(src)); imageUtils.Rotate("E:\\apache-tomcat-7.0.59\\webapps\\wxs\\upload\\image\\1\\2016\\3\\30\\1459347622160.jpg","E:\\apache-tomcat-7.0.59\\webapps\\wxs\\upload/image/1/2016/3/30/1459347622160_s.jpg", 90); imageUtils.Rotate("E:/apache-tomcat-7.0.59/webapps/wxs/upload/image/1/2016/3/30/1459349306443_s.jpg", "E:/apache-tomcat-7.0.59/webapps/wxs/upload/image/1/2016/3/30/1459349306443_s_200.jpg", 45); } }
制作头像上传。
请依据您的实际需求，改动代码。不全然正确，仅供參考。
前端页面设计使用bootstrap ，头像预览和剪裁工具使用cropper
后台使用springmvc。
如今来看前端的页面设计
前端页面设计，自然须要bootstrap 、jqury 和cropper 。这能够自行去网上百度查找
剪裁效果图
html 文件
cropper 提示：点击头像上传
js处理文件例如以下
main,js
$(function () { 'use strict'; var console = window.console || { log: function () {} }; var $image = $('#image'); var $download = $('#download'); var $dataX = $('#dataX'); var $dataY = $('#dataY'); var $dataHeight = $('#dataHeight'); var $dataWidth = $('#dataWidth'); var $dataRotate = $('#dataRotate'); var $dataScaleX = $('#dataScaleX'); var $dataScaleY = $('#dataScaleY'); var options = { aspectRatio: 16 / 9, preview: '.img-preview', crop: function (e) { $dataX.val(Math.round(e.x)); $dataY.val(Math.round(e.y)); $dataHeight.val(Math.round(e.height)); $dataWidth.val(Math.round(e.width)); $dataRotate.val(e.rotate); $dataScaleX.val(e.scaleX); $dataScaleY.val(e.scaleY); } }; // Tooltip $('[data-toggle="tooltip"]').tooltip(); // Cropper $image.on({ 'build.cropper': function (e) { console.log(e.type); }, 'built.cropper': function (e) { console.log(e.type); }, 'cropstart.cropper': function (e) { console.log(e.type, e.action); }, 'cropmove.cropper': function (e) { console.log(e.type, e.action); }, 'cropend.cropper': function (e) { console.log(e.type, e.action); }, 'crop.cropper': function (e) { console.log(e.type, e.x, e.y, e.width, e.height, e.rotate, e.scaleX, e.scaleY); }, 'zoom.cropper': function (e) { console.log(e.type, e.ratio); } }).cropper(options); // Buttons if (!$.isFunction(document.createElement('canvas').getContext)) { $('button[data-method="getCroppedCanvas"]').prop('disabled', true); } if (typeof document.createElement('cropper').style.transition === 'undefined') { $('button[data-method="rotate"]').prop('disabled', true); $('button[data-method="scale"]').prop('disabled', true); } // Download if (typeof $download[0].download === 'undefined') { $download.addClass('disabled'); } // Options $('.docs-toggles').on('change', 'input', function () { var $this = $(this); var name = $this.attr('name'); var type = $this.prop('type'); var cropBoxData; var canvasData; if (!$image.data('cropper')) { return; } if (type === 'checkbox') { options[name] = $this.prop('checked'); cropBoxData = $image.cropper('getCropBoxData'); canvasData = $image.cropper('getCanvasData'); options.built = function () { $image.cropper('setCropBoxData', cropBoxData); $image.cropper('setCanvasData', canvasData); }; } else if (type === 'radio') { options[name] = $this.val(); } $image.cropper('destroy').cropper(options); }); // Methods $('.docs-buttons').on('click', '[data-method]', function () { var $this = $(this); var data = $this.data(); var $target; var result; if ($this.prop('disabled') || $this.hasClass('disabled')) { return; } if ($image.data('cropper') && data.method) { data = $.extend({}, data); // Clone a new one if (typeof data.target !== 'undefined') { $target = $(data.target); if (typeof data.option === 'undefined') { try { data.option = JSON.parse($target.val()); } catch (e) { console.log(e.message); } } } result = $image.cropper(data.method, data.option, data.secondOption); switch (data.method) { case 'scaleX': case 'scaleY': $(this).data('option', -data.option); break; case 'getCroppedCanvas': if (result) { // Bootstrap's Modal $('#getCroppedCanvasModal').modal().find('.modal-body').html(result); if (!$download.hasClass('disabled')) { $download.attr('href', result.toDataURL('image/jpeg')); } } break; } if ($.isPlainObject(result) && $target) { try { $target.val(JSON.stringify(result)); } catch (e) { console.log(e.message); } } } }); // Keyboard $(document.body).on('keydown', function (e) { if (!$image.data('cropper') || this.scrollTop > 300) { return; } switch (e.which) { case 37: e.preventDefault(); $image.cropper('move', -1, 0); break; case 38: e.preventDefault(); $image.cropper('move', 0, -1); break; case 39: e.preventDefault(); $image.cropper('move', 1, 0); break; case 40: e.preventDefault(); $image.cropper('move', 0, 1); break; } }); // Import image var $inputImage = $('#inputImage'); var URL = window.URL || window.webkitURL; var blobURL; if (URL) { $inputImage.change(function () { var files = this.files; var file; if (!$image.data('cropper')) { return; } if (files && files.length) { file = files[0]; if (/^image\/\w+$/.test(file.type)) { blobURL = URL.createObjectURL(file); $image.one('built.cropper', function () { // Revoke when load complete URL.revokeObjectURL(blobURL); }).cropper('reset').cropper('replace', blobURL); $inputImage.val(''); } else { window.alert('Please choose an image file.'); } } }); } else { $inputImage.prop('disabled', true).parent().addClass('disabled'); }}); 须要加入的css样式 style.css
.avatar-view { display: block; margin: 0 auto; height: 220px; width: 220px; border: 3px solid #fff; border-radius: 5px; box-shadow: 0 0 5px rgba(0,0,0,.15); cursor: pointer; overflow: hidden;}.avatar-view img { width: 100%;}.avatar-body { padding-right: 15px; padding-left: 15px;}.avatar-upload { overflow: hidden;}.avatar-upload label { display: block; float: left; clear: left; width: 100px;}.avatar-upload input { display: block; margin-left: 110px;}.avater-alert { margin-top: 10px; margin-bottom: 10px;}.avatar-wrapper { height: 364px; width: 100%; margin-top: 15px; box-shadow: inset 0 0 5px rgba(0,0,0,.25); background-color: #fcfcfc; overflow: hidden;}.avatar-wrapper img { display: block; height: auto; max-width: 100%;}.avatar-preview { float: left; margin-top: 15px; margin-right: 15px; border: 1px solid #eee; border-radius: 4px; background-color: #fff; overflow: hidden;}.avatar-preview:hover { border-color: #ccf; box-shadow: 0 0 5px rgba(0,0,0,.15);}.avatar-preview img { width: 100%;}.preview-lg { height: 200px; width: 200px; margin-top: 15px;}.preview-md { height: 100px; width: 100px;}.preview-sm { height: 50px; width: 50px;}.preview-xs{ height:30px; width:30px;]}@media (min-width: 992px) { .avatar-preview { float: none; }}.avatar-btns { margin-top: 30px; margin-bottom: 15px;}.avatar-btns .btn-group { margin-right: 5px;}.loading { display: none; position: absolute; top: 0; right: 0; bottom: 0; left: 0; background: #fff url("patterns/loading.gif") no-repeat center center; opacity: .75; filter: alpha(opacity=75); z-index: 20140628;} 如今前端的基本完毕。 如今最重要的来了。就是后台java 处理了。
在网上找过非常多，发现没有，关于springmvc的。上面的内容基本上在网上找到，以下的springmvc的，关于图像处理的。就是我个人做的。好像网上有直接在前端进行剪裁的，可惜我不会啊，所以我还是老老实实的在后台处理了。
package com.cx.wxs.action.image;import java.io.File;import java.sql.Timestamp;import java.util.Date;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import com.cx.wxs.dto.BSiteDto;import com.cx.wxs.dto.IAlbumDto;import com.cx.wxs.dto.IImageDto;import com.cx.wxs.dto.UUserDto;import com.cx.wxs.service.BSiteService;import com.cx.wxs.service.IImageService;import com.cx.wxs.service.UUserService;import com.cx.wxs.utils.DateUtils;import com.cx.wxs.utils.clientInfo;import com.cx.wxs.utils.imageUtils;/** * @author roychenyi * @date 2016-3-29 下午9:22:01 */@Controller@RequestMapping("/{vip}/image")public class imageAction { @Resource private IImageService iImageService; @Resource private BSiteService bSiteService; @Resource private UUserService uUserService; /** * @return the bSiteService */ public BSiteService getbSiteService() { return bSiteService; } /** * @param bSiteService the bSiteService to set */ public void setbSiteService(BSiteService bSiteService) { this.bSiteService = bSiteService; } /** * @return the uUserService */ public UUserService getuUserService() { return uUserService; } /** * @param uUserService the uUserService to set */ public void setuUserService(UUserService uUserService) { this.uUserService = uUserService; } /** * @return the iImageService */ public IImageService getiImageService() { return iImageService; } /** * @param iImageService the iImageService to set */ public void setiImageService(IImageService iImageService) { this.iImageService = iImageService; } @RequestMapping(value="/updateuserlogo") @ResponseBody public IImageDto updateUserLogo( @PathVariable("vip") String vip, Integer x, Integer y, Integer width, Integer height,Integer degree, @RequestParam(value = "avatar_file") MultipartFile imageFile, HttpServletRequest request,HttpServletResponse response){ IImageDto imageDto=new IImageDto(); //获取server的实际路径 String realPath = request.getSession().getServletContext().getRealPath("/"); System.out.println("x:"+x+"y:"+y+"width:"+width+"height:"+height+"degree:"+degree); System.out.println(realPath); //须要上传的路径，我的路径依据用户的和当前日期划分路径 String resourcePath="upload/image"; UUserDto userDto=(UUserDto) request.getSession().getAttribute("user"); resourcePath+="/"+userDto.getUserId(); if(imageFile!=null){ try{ //文件名称 String name= imageFile.getOriginalFilename(); //获取时间的路径 Date date=new Date(); int year=DateUtils.getYear(date); int month=DateUtils.getMonth(date); int day=DateUtils.getDay(date); resourcePath+="/"+year+"/"+month+"/"+day+"/"; File dir=new File(realPath+resourcePath); if(!dir.exists()){ dir.mkdirs(); } //先把用户上传到原图保存到server上 File file=new File(dir,date.getTime()+".jpg"); imageFile.transferTo(file); if(file.exists()){ String src=realPath+resourcePath+date.getTime(); boolean[] flag=new boolean[6]; //旋转后剪裁图片 flag[0]=imageUtils.cutAndRotateImage(src+".jpg", src+"_s.jpg", x, y, width, height, degree); //缩放图片,生成不同大小的图片，应用于不同的大小的头像显示 flag[1]= imageUtils.scale2(src+"_s.jpg", src+"_s_200.jpg", 200, 200, true); flag[2]= imageUtils.scale2(src+"_s.jpg", src+"_s_100.jpg", 100, 100, true); flag[3]= imageUtils.scale2(src+"_s.jpg", src+"_s_50.jpg", 50, 50, true); flag[4]= imageUtils.scale2(src+"_s.jpg", src+"_s_30.jpg", 30, 30, true); flag[5]= imageUtils.scale2(file.getPath(), src+"_200.jpg", 200, 200, true); if(flag[0]&&flag[1]&&flag[2]&&flag[3]&&flag[4]&&flag[5]){ //图像处理完毕，将数据写入数据库中 imageDto.setYear((short) year); imageDto.setMount((short)month); imageDto.setDay((short)day); imageDto.setUUserDto(userDto); imageDto.setName(date.getTime()+".jpg"); imageDto.setFileName(name); imageDto.setUrl(resourcePath+"/"+date.getTime()+".jpg"); imageDto.setPreviewUrl(resourcePath+"/"+date.getTime()+"_200.jpg"); imageDto.setTime(new Timestamp(date.getTime())); imageDto.setWidth((short)imageUtils.getImageWidth(file.getPath())); imageDto.setHeight((short)imageUtils.getImageHeight(file.getPath())); imageDto.setClientIp(clientInfo.getIpAddr(request)); imageDto.setClientAgent(clientInfo.getAgent(request)); imageDto.setClientType((short)(clientInfo.isMoblie(request)?1:0)); imageDto.setStatus((short)1); imageDto.setExt3(resourcePath+"/"+date.getTime()+"_s_200.jpg"); imageDto.setExt4(resourcePath+"/"+date.getTime()+"_s_100.jpg"); //设置相冊，头像设置进入默认相冊 IAlbumDto albumDto=new IAlbumDto(); albumDto.setAlbumId(1); imageDto.setIAlbumDto(albumDto); int id= iImageService.addIImage(imageDto); if(id>0){ BSiteDto siteDto=userDto.getBSiteDto(); siteDto.setLogo(resourcePath+"/"+date.getTime()+"_s_100.jpg"); siteDto.setLastTime( new Timestamp(date.getTime())); bSiteService.updateBSite(siteDto); userDto.setPortrait(resourcePath+"/"+date.getTime()+"_s_30.jpg"); uUserService.updateUuser(userDto); userDto=uUserService.getUuser(userDto); imageDto.setLoginFlag("1"); return imageDto; } } } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); return imageDto; } } return imageDto; }} 以下是图像处理的工具类。imageUtils.java.欢迎借鉴引用。（我也是在我网上找了非常多进行參考的）
package com.cx.wxs.utils;import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Dimension;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Rectangle;import java.awt.RenderingHints;import java.awt.color.ColorSpace;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;import java.awt.image.BufferedImage;import java.awt.image.ColorConvertOp;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.sql.Timestamp;import java.util.Date;import java.util.HashMap;import java.util.Iterator;import javax.imageio.ImageIO;import javax.imageio.ImageReadParam;import javax.imageio.ImageReader;import javax.imageio.stream.ImageInputStream;import javax.imageio.stream.ImageOutputStream;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import com.cx.wxs.dto.IImageDto;/** * @author roychenyi * @date 2016-3-30 上午10:11:39 */public class imageUtils { private static Log log = LogFactory.getLog(imageUtils.class); /*** * 获取图片的类型 * @param o * @return * @date 2016-3-30下午4:59:36 */ private static String getFormatName(Object o) { try { ImageInputStream iis = ImageIO.createImageInputStream(o); Iterator iter = ImageIO.getImageReaders(iis); if (!iter.hasNext()) { return null; } ImageReader reader = iter.next(); iis.close(); return reader.getFormatName(); } catch (IOException e) { } return null; } /** * 使用ImageReader获取图片尺寸 * * @param src * 源图片路径 */ public void getImageSizeByImageReader(String src) { long beginTime = new Date().getTime(); File file = new File(src); try { Iterator readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); System.out.println("width:" + reader.getWidth(0)); System.out.println("height:" + reader.getHeight(0)); } catch (IOException e) { e.printStackTrace(); } long endTime = new Date().getTime(); System.out.println("使用[ImageReader]获取图片尺寸耗时：[" + (endTime - beginTime)+"]ms"); } /** * 使用BufferedImage获取图片尺寸 * * @param src * 源图片路径 */ public void getImageSizeByBufferedImage(String src) { long beginTime = new Date().getTime(); File file = new File(src); FileInputStream is = null; try { is = new FileInputStream(file); } catch (FileNotFoundException e2) { e2.printStackTrace(); } BufferedImage sourceImg = null; try { sourceImg = javax.imageio.ImageIO.read(is); System.out.println("width:" + sourceImg.getWidth()); System.out.println("height:" + sourceImg.getHeight()); } catch (IOException e1) { e1.printStackTrace(); } long endTime = new Date().getTime(); System.out.println("使用[BufferedImage]获取图片尺寸耗时：[" + (endTime - beginTime)+"]ms"); } /*** * 获取图片的宽 * @param srcImageFile * @return * @date 2016-3-30下午9:01:08 */ public static int getImageWidth(String srcImageFile){ try { File file = new File(srcImageFile); Iterator readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); return reader.getWidth(0); } catch (IOException e) { e.printStackTrace(); return 0; } } /*** * 获取文件的高 * @param srcImageFile * @return * @date 2016-3-30下午9:02:19 */ public static int getImageHeight(String srcImageFile){ File file = new File(srcImageFile); try { Iterator readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); return reader.getHeight(0); } catch (IOException e) { e.printStackTrace(); return 0; } } /*** * 剪裁图片 * @param src * @param dest * @param x 起点横坐标 * @param y 纵坐标 * @param w 长 * @param h 高 * @throws IOException * @date 2016-3-30下午12:19:10 */ public static boolean cutImage(String src,String dest,int x,int y,int w,int h) { try{ Iterator iterator = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader)iterator.next(); InputStream in=new FileInputStream(src); ImageInputStream iis = ImageIO.createImageInputStream(in); reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam(); x=(x>0? x:0); y=(y>0?y:0); Rectangle rect = new Rectangle(x, y, w,h); param.setSourceRegion(rect); BufferedImage bi = reader.read(0,param); ImageIO.write(bi, "jpg", new File(dest)); return true; }catch (Exception e) { // TODO: handle exception e.printStackTrace(); return false; } } /*** * 图片旋转指定角度 * @param bufferedimage 图像 * @param degree 角度 * @return * @date 2016-3-30下午3:10:27 */ public static BufferedImage rotateImage(final BufferedImage bufferedimage, final int degree) { int w = bufferedimage.getWidth(); int h = bufferedimage.getHeight(); int type = bufferedimage.getColorModel().getTransparency(); BufferedImage img; Graphics2D graphics2d; (graphics2d = (img = new BufferedImage(w, h, type)) .createGraphics()).setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); // graphics2d.setBackground(Color.white); graphics2d.setPaint(Color.WHITE); graphics2d.fillRect(0, 0, w, h); graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2); graphics2d.drawImage(bufferedimage, 0, 0,Color.WHITE, null); graphics2d.dispose(); return img; } public static boolean rotateImage(String srcImageFile, String result, int degree){ try{ BufferedImage src = ImageIO.read(new File(srcImageFile)); // 读入文件 BufferedImage tag= rotateImage(src, degree); ImageIO.write(tag, "JPEG", new File(result)); return true; }catch (Exception e) { // TODO: handle exception return false; } } public static BufferedImage Rotate(Image src, int angel) { int src_width = src.getWidth(null); int src_height = src.getHeight(null); // angel=angel>0?
angel:(360-angel); // calculate the new image size Rectangle rect_des = CalcRotatedSize(new Rectangle(new Dimension( src_width, src_height)), angel); BufferedImage res = null; res = new BufferedImage(rect_des.width, rect_des.height, BufferedImage.TYPE_INT_RGB); Graphics2D g2 = res.createGraphics(); g2.setPaint(Color.WHITE); g2.fillRect(0, 0, rect_des.width, rect_des.height); // transform g2.translate((rect_des.width - src_width) / 2, (rect_des.height - src_height) / 2); g2.rotate(Math.toRadians(angel), src_width / 2, src_height / 2); g2.drawImage(src, null, null); return res; } public static Rectangle CalcRotatedSize(Rectangle src, int angel) { // if angel is greater than 90 degree, we need to do some conversion if (angel >= 90) { if(angel / 90 % 2 == 1){ int temp = src.height; src.height = src.width; src.width = temp; } angel = angel % 90; } double r = Math.sqrt(src.height * src.height + src.width * src.width) / 2; double len = 2 * Math.sin(Math.toRadians(angel) / 2) * r; double angel_alpha = (Math.PI - Math.toRadians(angel)) / 2; double angel_dalta_width = Math.atan((double) src.height / src.width); double angel_dalta_height = Math.atan((double) src.width / src.height); int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width)); int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height)); int des_width = src.width + len_dalta_width * 2; int des_height = src.height + len_dalta_height * 2; return new java.awt.Rectangle(new Dimension(des_width, des_height)); } public static boolean Rotate(String srcImageFile, String result, int degree){ try{ degree=degree>0?
degree:(360-degree); BufferedImage src = ImageIO.read(new File(srcImageFile)); BufferedImage tag = Rotate(src, degree); ImageIO.write(tag, "JPEG", new File(result)); return true; }catch (Exception e) { // TODO: handle exception e.printStackTrace(); return false; } } public static boolean cutAndRotateImage(String srcImageFile,String dest,int x,int y,int w,int h,int degree){ try{ BufferedImage src = ImageIO.read(new File(srcImageFile)); // 读入文件 BufferedImage tag= Rotate(src, degree); Iterator iterator = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader)iterator.next(); // InputStream in=new FileInputStream(tag); ByteArrayOutputStream bs = new ByteArrayOutputStream(); ImageOutputStream ios = ImageIO.createImageOutputStream(bs); ImageIO.write(tag, "jpg", ios); InputStream in=new ByteArrayInputStream(bs.toByteArray()); ImageInputStream iis=ImageIO.createImageInputStream(in); reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam(); x=(x>0?x:0); y=(y>0?
y:0); Rectangle rect = new Rectangle(x, y, w,h); param.setSourceRegion(rect); BufferedImage bi = reader.read(0,param); ImageIO.write(bi, "jpg", new File(dest)); return true; }catch (Exception e) { // TODO: handle exception return false; } } /*** * 依照比例缩放 * @param srcImageFile * @param result * @param scale 缩放比例 * @param flag 缩放选择:true 放大; false 缩小; * @return * @date 2016-3-30下午2:39:44 */ public static boolean scale(String srcImageFile, String result, int scale, boolean flag) { try { File file = new File(srcImageFile); BufferedImage src = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width = reader.getWidth(0); // 得到源图宽 int height = reader.getHeight(0); // 得到源图长 if (flag) {// 放大 width = width * scale; height = height * scale; } else {// 缩小 width = width / scale; height = height / scale; } Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT); BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(image, 0, 0, null); // 绘制缩小后的图 g.dispose(); ImageIO.write(tag, "jpg", new File(result));// 输出到文件流 return true; } catch (IOException e) { e.printStackTrace(); return false; } } /*** * 缩放图像，依照长宽缩放 * @param srcImageFile * @param result * @param height 变换后的高度 * @param width 变换后的长度 * @param bb 比例不正确称时，是否补白，true 补白;false 不补白 * @return * @date 2016-3-30下午2:44:37 */ public static boolean scale2(String srcImageFile, String result, int height, int width, boolean bb) { try { double ratio = 0.0; // 缩放比例 File file = new File(srcImageFile); BufferedImage bi = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width1 = reader.getWidth(0); // 得到源图宽 int height1 = reader.getHeight(0); // 得到源图长 Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH); // 计算比例 if ((height1 > height) || (width1 > width)) { if (height1 > width1) { ratio = (new Integer(height)).doubleValue() / height1; } else { ratio = (new Integer(width)).doubleValue() / width1; } AffineTransformOp op = new AffineTransformOp(AffineTransform .getScaleInstance(ratio, ratio), null); itemp = op.filter(bi, null); } if (bb) {//补白 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.setColor(Color.white); g.fillRect(0, 0, width, height); if (width == itemp.getWidth(null)) g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); else g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); g.dispose(); itemp = image; } ImageIO.write((BufferedImage) itemp, "JPEG", new File(result)); return true; } catch (IOException e) { e.printStackTrace(); return false; } } /*** * 转换图像格式 * @param srcImageFile 原图像地址 * @param formatName 转换类型 * @param destImageFile 转换后的地址 * @return * @author roychenyi * @date 2016-3-30下午2:49:15 */ public static boolean convert(String srcImageFile, String formatName, String destImageFile) { try { File f = new File(srcImageFile); f.canRead(); f.canWrite(); BufferedImage src = ImageIO.read(f); ImageIO.write(src, formatName, new File(destImageFile)); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * 彩色转为黑白 * @param srcImageFile 源图像地址 * @param destImageFile 目标图像地址 */ public final static void gray(String srcImageFile, String destImageFile) { try { BufferedImage src = ImageIO.read(new File(srcImageFile)); ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY); ColorConvertOp op = new ColorConvertOp(cs, null); src = op.filter(src, null); ImageIO.write(src, "jpg", new File(destImageFile)); } catch (IOException e) { e.printStackTrace(); } } /** * 给图片加入图片水印 * @param pressImg 水印图片 * @param srcImageFile 源图像地址 * @param destImageFile 目标图像地址 * @param x 修正值。 默认在中间 * @param y 修正值。 默认在中间 * @param alpha 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包括边界值）的一个浮点数字 */ public static boolean pressImage(String pressImg, String srcImageFile,String destImageFile, int x, int y, float alpha) { try { File file = new File(srcImageFile); BufferedImage src = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width = reader.getWidth(0); // 得到源图宽 int height = reader.getHeight(0); // 得到源图长 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.drawImage(src, 0, 0, width, height, null); // 水印文件 Image src_biao = ImageIO.read(new File(pressImg)); int wideth_biao = src_biao.getWidth(null); int height_biao = src_biao.getHeight(null); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); g.drawImage(src_biao, (width-wideth_biao-x) , (height-height_biao-y) , wideth_biao, height_biao, null); // 水印文件结束 g.dispose(); ImageIO.write((BufferedImage) image, "jpg", new File(destImageFile)); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * 给图片加入文字水印 * @param pressText 水印文字 * @param srcImageFile 源图像地址 * @param destImageFile 目标图像地址 * @param fontName 水印的字体名称 * @param fontStyle 水印的字体样式 * @param color 水印的字体颜色 * @param fontSize 水印的字体大小 * @param x 修正值 * @param y 修正值 * @param alpha 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包括边界值）的一个浮点数字 */ public static boolean pressText(String pressText, String srcImageFile, String destImageFile, String fontName, int fontStyle, Color color, int fontSize,int x, int y, float alpha) { try { File file = new File(srcImageFile); BufferedImage src = ImageIO.read(file); // 读入文件 Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg"); ImageReader reader = (ImageReader) readers.next(); ImageInputStream iis = ImageIO.createImageInputStream(file); reader.setInput(iis, true); int width = reader.getWidth(0); // 得到源图宽 int height = reader.getHeight(0); // 得到源图长 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.drawImage(src, 0, 0, width, height, null); g.setColor(color); g.setFont(new Font(fontName, fontStyle, fontSize)); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); // 在指定坐标绘制水印文字 g.drawString(pressText, (width - (getLength(pressText) * fontSize)) / 2 + x, (height - fontSize) / 2 + y); g.dispose(); ImageIO.write(image, "jpg", new File(destImageFile));// 输出到文件流 return true; } catch (Exception e) { e.printStackTrace(); return false; } } /** * 计算text的长度（一个中文算两个字符） * @param text * @return */ public static int getLength(String text) { int length = 0; for (int i = 0; i < text.length(); i++) { if (new String(text.charAt(i) + "").getBytes().length > 1) { length += 2; } else { length += 1; } } return length / 2; } public static void main(String[] args) { String src="D:/0.jpg"; /* imageUtils.cutImage(src, "D://1cut.jpg", -10, 40, 100000, 560); imageUtils.rotateImage(src, "D:/2rotate.jpg", -30); imageUtils.rotateImage(src, "D:/2rotate1.png", 30); imageUtils.Rotate(src, "D://2rotate2.jpg", 330); imageUtils.Rotate(src,"D://2rotate21.jpg",30); imageUtils.cutAndRotateImage(src, "D://9cutRotate1.jpg", 244, 427, 614, 614, 0); imageUtils.scale(src, "D://3scale1.jpg", 3, false); imageUtils.scale2(src, "D://4scale2.jpg", 780,560, false); imageUtils.convert(src, "png", "D://5convert.png"); imageUtils.gray(src,"D://6gray.jpg"); imageUtils.pressImage("D://3scale1.jpg", src, "D://7pressImage.jpg", 100, 100, 0.9f); imageUtils.pressText("图片1414", src, "D://8pressText.jpg", "宋体", Font.BOLD, Color.black, 80, 10, 10,0.6f); */ imageUtils util = new imageUtils(); util.getImageSizeByImageReader(src); util.getImageSizeByBufferedImage(src); System.out.println(getImageHeight(src)); imageUtils.Rotate("E:\\apache-tomcat-7.0.59\\webapps\\wxs\\upload\\image\\1\\2016\\3\\30\\1459347622160.jpg","E:\\apache-tomcat-7.0.59\\webapps\\wxs\\upload/image/1/2016/3/30/1459347622160_s.jpg", 90); imageUtils.Rotate("E:/apache-tomcat-7.0.59/webapps/wxs/upload/image/1/2016/3/30/1459349306443_s.jpg", "E:/apache-tomcat-7.0.59/webapps/wxs/upload/image/1/2016/3/30/1459349306443_s_200.jpg", 45); } }