java裁剪图片
前台用javaScript，后台用java裁剪图片
<blockquote style="margin-right: 0px;">总体思想：
1.前台网页用js得到裁剪图片的id及x,y，宽度和高度。
2.服务端根据id取出要裁剪的图片 。
3.根据这些参数来生成裁剪的图像。
后台代码如下：
<div style="padding-right: 5.4pt; padding-left: 5.4pt; background: #e6e6e6; padding-bottom: 4px; width: 95%; padding-top: 4px;">http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifpackage com.wodexiangce;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport java.awt.Rectangle;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport java.awt.image.BufferedImage;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport java.io.File;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport java.io.FileInputStream;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport java.io.IOException;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport java.util.Iterator;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport javax.imageio.ImageIO;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport javax.imageio.ImageReadParam;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport javax.imageio.ImageReader;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gifimport javax.imageio.stream.ImageInputStream;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif/** *//**
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * @author <a href="mailto:lqinglong@yahoo.cn">qinglong.lu</a>
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 2008-3-21
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gifpublic class OperateImage ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //===源图片路径名称如:c:\1.jpg
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private String srcpath ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //===剪切图片存放路径名称.如:c:\2.jpg
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private String subpath ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //===剪切点x坐标
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private int x ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private int y ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //===剪切点宽度
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private int width ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private int height ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public OperateImage()...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public OperateImage(int x,int y,int width,int height)...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.x = x ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.y = y ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.width = width ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.height = height ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /** *//**
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 对图片裁剪，并把裁剪完蛋新图片保存 。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public void cut() throws IOException...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif FileInputStream is = null ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif ImageInputStream iis =null ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif try...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //读取图片文件
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif is = new FileInputStream(srcpath);
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /**//*
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 返回包含所有当前已注册 ImageReader 的 Iterator，这些 ImageReader
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 声称能够解码指定格式。 参数：formatName - 包含非正式格式名称 .
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *（例如 "jpeg" 或 "tiff"）等 。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg");
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif ImageReader reader = it.next();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //获取图片流
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif iis = ImageIO.createImageInputStream(is);
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /**//*
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * <p>iis:读取源.true:只向前搜索 </p>.将它标记为 ‘只向前搜索’。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 此设置意味着包含在输入源中的图像将只按顺序读取，可能允许 reader
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 避免缓存包含与以前已经读取的图像关联的数据的那些输入部分。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif reader.setInput(iis,true) ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /**//*
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * <p>描述如何对流进行解码的类<p>.用于指定如何在输入时从 Java Image I/O
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 框架的上下文中的流转换一幅图像或一组图像。用于特定图像格式的插件
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 将从其 ImageReader 实现的 getDefaultReadParam 方法中返回
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * ImageReadParam 的实例。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif ImageReadParam param = reader.getDefaultReadParam();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /**//*
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 图片裁剪区域。Rectangle 指定了坐标空间中的一个区域，通过 Rectangle 对象
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 的左上顶点的坐标（x，y）、宽度和高度可以定义这个区域。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif Rectangle rect = new Rectangle(x, y, width, height);
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //提供一个 BufferedImage，将其用作解码像素数据的目标。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif param.setSourceRegion(rect);
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /**//*
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 使用所提供的 ImageReadParam 读取通过索引 imageIndex 指定的对象，并将
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 它作为一个完整的 BufferedImage 返回。
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif BufferedImage bi = reader.read(0,param);
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif //保存新图片
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif ImageIO.write(bi, "jpg", new File(subpath));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif finally...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif if(is!=null)
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif is.close() ;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif if(iis!=null)
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif iis.close();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public int getHeight() ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return height;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public void setHeight(int height) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.height = height;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public String getSrcpath() ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return srcpath;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public void setSrcpath(String srcpath) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.srcpath = srcpath;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public String getSubpath() ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return subpath;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public void setSubpath(String subpath) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.subpath = subpath;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public int getWidth() ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return width;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public void setWidth(int width) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.width = width;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public int getX() ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return x;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public void setX(int x) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif this.x = x;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public int getY() ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return y;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public
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