[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();
     } 

 }