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1 import java.io.File; 2 import java.io.FileOutputStream; 3 import java.io.InputStream; 4 import java.io.OutputStream; 5 import java.net.URL; 6 import java.net.URLConnection; 7  8  9 public class DownloadImage {10 11     /**12      * @param args13      * @throws Exception 14      */15     public static void main(String[] args) throws Exception {16         // TODO Auto-generated method stub17          download("http://ui.51bi.com/opt/siteimg/images/fanbei0923/Mid_07.jpg", "51bi.gif","c:\\image\\");18     }19     20     public static void download(String urlString, String filename,String savePath) throws Exception {21         // 构造URL22         URL url = new URL(urlString);23         // 打开连接24         URLConnection con = url.openConnection();25         //设置请求超时为5s26         con.setConnectTimeout(5*1000);27         // 输入流28         InputStream is = con.getInputStream();29     30         // 1K的数据缓冲31         byte[] bs = new byte[1024];32         // 读取到的数据长度33         int len;34         // 输出的文件流35        File sf=new File(savePath);36        if(!sf.exists()){37            sf.mkdirs();38        }39        OutputStream os = new FileOutputStream(sf.getPath()+"\\"+filename);40         // 开始读取41         while ((len = is.read(bs)) != -1) {42           os.write(bs, 0, len);43         }44         // 完毕，关闭所有链接45         os.close();46         is.close();47     } 48 49 }