Java 压缩图片

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.URL;


import javax.imageio.ImageIO;


import org.apache.commons.lang3.StringUtils;


import com.duozhuan.util.DuoZhuanUtil;
import com.duozhuan.util.QiniuUtil;

public class Test {

private static void watermarkImage() {
   
     try {
        //加载背景图
            Image bgImg = ImageIO.read(new File("D:\\01.jpg"));
            int bgImgWidth = bgImg.getWidth(null);
            int bgImgHeight = bgImg.getHeight(null);
            BufferedImage image = new BufferedImage(bgImgWidth, bgImgHeight,BufferedImage.TYPE_INT_RGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(bgImg, 0, 0, bgImgWidth, bgImgHeight, null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,0.6f));
            
            g.dispose();
            ImageIO.write((BufferedImage) image,  "JPEG", new File("D:\\test03102.jpg"));
            
//            baos = new ByteArrayOutputStream();
//            ImageIO.write((BufferedImage) image,  "JPEG", baos);
          //  baos.flush();
            
        } catch (Throwable e) {
        }finally{
        }      }

}

服务器返回地址

package com.duozhuan.action;


import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.URL;


import javax.imageio.ImageIO;


import org.apache.commons.lang3.StringUtils;


import com.duozhuan.util.DuoZhuanUtil;
import com.duozhuan.util.QiniuUtil;


public class Test {

private static String watermarkImage(String nickName, String headImgUrl, String area, String qrImgUrl, String bgImgPath) {
    if(StringUtils.isBlank(qrImgUrl)){
    return StringUtils.EMPTY;
    }
    ByteArrayOutputStream baos = null;
    String url = "";
        try {
        //加载背景图
            Image bgImg = ImageIO.read(new File(""));
            int bgImgWidth = bgImg.getWidth(null);
            int bgImgHeight = bgImg.getHeight(null);
            BufferedImage image = new BufferedImage(bgImgWidth, bgImgHeight,BufferedImage.TYPE_INT_RGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(bgImg, 0, 0, bgImgWidth, bgImgHeight, null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,0.9f));
            
            g.dispose();
            baos = new ByteArrayOutputStream();
            ImageIO.write((BufferedImage) image,  "JPEG", baos);
            baos.flush();
            url = QiniuUtil.imageUpload(baos.toByteArray(), QiniuUtil.getUploadToken(), DuoZhuanUtil.qrUserImgName(),"image/jpeg");
        } catch (Throwable e) {
        }finally{
        if(baos!=null){
        try {
baos.close();
} catch (IOException e) {
}
        }
        }  
        return url;
    }


}