Java压缩图片的实现类

package com.function;import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
/** 这是一个压缩图片的实现类*/
public class Tools_CompressPictures {public void compressPicture(String srcImage,String tarImage) {File srcImageFile = new File(srcImage);File tarImageFile = new File(tarImage);// 生成图片转化对象AffineTransform transform = new AffineTransform();// 通过缓存读入缓存对象BufferedImage image = null;try {image = ImageIO.read(srcImageFile);} catch (IOException e) {e.printStackTrace();}int imageWidth = image.getWidth();//原图片的高度int imageHeight = image.getHeight();//原图片的宽度int changeWidth = 640;//压缩后图片的高度int changeHeight = 480;//压缩后图片的宽度double scaleWidth = 0;// 定义小图片和原图片比例double scaleHeight = 0;scaleWidth = (double) changeWidth / (double) imageWidth;scaleHeight = (double) changeHeight / (double) imageHeight;// 生成转换比例transform.setToScale(scaleWidth, scaleHeight);// 生成转换操作对象AffineTransformOp transOp = new AffineTransformOp(transform, null);//生成压缩图片缓冲对象BufferedImage basll = new BufferedImage(changeWidth, changeHeight,BufferedImage.TYPE_3BYTE_BGR);//生成缩小图片transOp.filter(image, basll);try {//输出缩小图片ImageIO.write(basll, "jpg",tarImageFile);} catch (IOException e) {e.printStackTrace();}}}