java上传图片剪切工具类
package com.up.util; import java.awt.Rectangle; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.util.Iterator; import javax.imageio.ImageIO; import javax.imageio.ImageReadParam; import javax.imageio.ImageReader; import javax.imageio.stream.ImageInputStream; public class OperateImage { private String srcpath; //原图路径 private String subpath; //目标存放路径 private String imageType; //图片类型 private int x; private int y; private int width; //图片目标宽度 private int height; //图片目标高度 public OperateImage() { } public OperateImage(String srcpath, int x, int y, int width, int height) { this.srcpath = srcpath; this.x = x; this.y = y; this.width = width; this.height = height; } public int getHeight() { return height; } public void setHeight(int height) { this.height = height; } public String getSrcpath() { return srcpath; } public void setSrcpath(String srcpath) { this.srcpath = srcpath; if(srcpath != null) { this.imageType = srcpath.substring(srcpath.indexOf(".")+1, srcpath.length()); } } public String getSubpath() { return subpath; } public void setSubpath(String subpath) { this.subpath = subpath; } public int getWidth() { return width; } public void setWidth(int width) { this.width = width; } public int getX() { return x; } public void setX(int x) { this.x = x; } public int getY() { return y; } public void setY(int y) { this.y = y; } public String getImageType() { return imageType; } public void setImageType(String imageType) { this.imageType = imageType; } public boolean cut() throws IOException { FileInputStream is = null; ImageInputStream iis = null; boolean bol = false; try { is = new FileInputStream(srcpath); Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName(this.imageType); ImageReader reader = it.next(); iis = ImageIO.createImageInputStream(is); reader.setInput(iis, true); ImageReadParam param = reader.getDefaultReadParam(); Rectangle rect = new Rectangle(x, y, width, height); param.setSourceRegion(rect); BufferedImage bi = reader.read(0, param); //实际高度大于目标高度或者实际宽度大于目标宽度则进行剪切 File o = new File(srcpath); BufferedImage bii = ImageIO.read(o); int itempWidth = bii.getWidth(); //实际宽度 int itempHeight = bii.getHeight(); //实际高度 if ((itempHeight > height) || (itempWidth > width)) { ImageIO.write(bi, this.imageType, new File(subpath)); bol = true; } } finally { if (is != null) is.close(); if (iis != null) iis.close(); } return bol; } public static void main(String[] args) { OperateImage o = new OperateImage("E:\\testdata\\1.jpg", 0, 0, 100, 100); o.setSubpath("E:\\testdata\\2.jpg"); o.setImageType("jpg"); try { o.cut(); } catch (IOException e) { e.printStackTrace(); } } }