java 下载网络上的图片并保存到本地目录

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();} }