[转]java 下载网络上的图片并保存到本地目录

原文地址:http://takeme.iteye.com/blog/1683380

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;


public class DownloadImage {

    /**
     * @param args
     * @throws Exception 
     */
    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
         download("http://ui.51bi.com/opt/siteimg/images/fanbei0923/Mid_07.jpg", "51bi.gif","c:\image\");
    }
    
    public static void download(String urlString, String filename,String savePath) throws Exception {
        // 构造URL
        URL url = new URL(urlString);
        // 打开连接
        URLConnection con = url.openConnection();
        //设置请求超时为5s
        con.setConnectTimeout(5*1000);
        // 输入流
        InputStream is = con.getInputStream();
    
        // 1K的数据缓冲
        byte[] bs = new byte[1024];
        // 读取到的数据长度
        int len;
        // 输出的文件流
       File sf=new File(savePath);
       if(!sf.exists()){
           sf.mkdirs();
       }
       OutputStream os = new FileOutputStream(sf.getPath()+"\"+filename);
        // 开始读取
        while ((len = is.read(bs)) != -1) {
          os.write(bs, 0, len);
        }
        // 完毕，关闭所有链接
        os.close();
        is.close();
    } 

}