下载文件到某个路径

/**
	 * 下载文件到某个路径
	 * @param url
	 * @param path
	 */
    public static long downloadFile(String url,String path){
    	StringBuffer sb = new StringBuffer();
    	
    	
    	PrintWriter out = null;
    	InputStream in = null;
    	FileOutputStream os = null;
    	try {
             URL realUrl = new URL(url);
             // 打开和URL之间的连接
             URLConnection conn = realUrl.openConnection();
             // 设置通用的请求属性
             conn.setRequestProperty("accept", "*/*");
             conn.setRequestProperty("connection", "Keep-Alive");
//             if(StringUtils.isNotBlank(serverCode)){
//             	long time = System.currentTimeMillis();
//             	StringBuilder bd = new StringBuilder().append(serverCode).append(time).append(secret);
//             	String md5 = "";
//             	try {
//             		md5 = SecretFactory.getInstance().getSecret(SecretType.MD5).encode(bd.toString());
//             	} catch (SecretException e1) {
//             		e1.printStackTrace();
//             	}
//         	
//             	String auth = serverCode + ";" + time + ";" + md5;
//             	conn.setRequestProperty("Authorization", auth);
//             }
             conn.setRequestProperty("user-agent",
                     "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
             // 发送POST请求必须设置如下两行
             conn.setDoOutput(true);
             conn.setDoInput(true);
             out = new PrintWriter(conn.getOutputStream());
             out.print(sb.toString());
             // flush输出流的缓冲
             out.flush();
             // 定义InputStream输入流来读取URL的响应
             in = conn.getInputStream();
             os = new FileOutputStream(path); 
             byte[] buffer = new byte[4*1024]; 
             int read; 
             long size = 0;
             while((read = in.read(buffer)) > 0){ 
            	 os.write(buffer, 0, read); 
            	 size+=read;
             } 
             return size;
    	}catch(Exception e){
    		e.printStackTrace();
    		return 0;
    	}finally{
    		out.close();
    		try {
				in.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
    		try {
				os.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
    	}
    	
    	
    }