抓取网上的图片（转）

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我是靠谱客的博主稳重哈密瓜，这篇文章主要介绍抓取网上的图片（转），现在分享给大家，希望可以做个参考。

package com.winkee.wse.util;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class ImageUtil {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        try{
             new ImageUtil().createImage(new URL("http://www.google.cn/intl/zh-CN/images/logo_cn.gif"),new File("./loge.jpg"));
         }catch(Exception e){
                 e.printStackTrace();
         }
    }

    public void createImage(File file,File targetFile) throws IOException{
        Image src=ImageIO.read(file);
        int width=src.getWidth(null);
        int height=src.getHeight(null);
        this.writerToImage(src, targetFile, width, height);
    }

    public void createImage(File file,File targetFile,int width,int height) throws IOException{
        Image src=ImageIO.read(file);
        this.writerToImage(src, targetFile, width, height);
    }

    public void createImage(URL url,File targetFile) throws IOException{
        Image src=ImageIO.read(url);
        int width=src.getWidth(null);
        int height=src.getHeight(null);
        this.writerToImage(src, targetFile, width, height);
    }

    public void createImage(URL url,File targetFile,int width,int height) throws IOException{
        Image src=ImageIO.read(url);
        this.writerToImage(src, targetFile, width, height);
    }

    //生成图片（长width,宽height）并将图片放入targetFile中。

    public void writerToImage(Image src,File targetFile,int width,int height) throws IOException{
        BufferedImage tag=new BufferedImage(width,height,BufferedImage.TYPE_3BYTE_BGR);
        tag.getGraphics().drawImage(src,0,0,width,height,null); //绘制缩小后的图
        FileOutputStream destOut=new FileOutputStream(targetFile); //输出到文件流
        JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(destOut);
        encoder.encode(tag); //JPEG编码