HTTP提交数据

    /**
     * 将放入的参数转换成POST的形式key=value
     * @param parames
     * @param encode
     * @return
     */
    public static String sendPostMessage(Map<String,String> parames,String encode){
        
        StringBuffer buffer=new StringBuffer();
        try{
        
        if(parames!=null&&!parames.isEmpty())
        {
            for(Map.Entry<String, String> entry:parames.entrySet()){
                buffer.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), encode)).append("&");
            }
        }
        return sendOutput(buffer.toString());
        }catch(Exception e){
            
        }
        return null;
        
    }
    /**
     * @param outputStream 传入的要输出的对象的流
     * @param data 获取发送的数据
     * @return 
     */
    private static String sendOutput(String data){
        try{
            byte[] mydata=data.getBytes();
            URL url=new URL(URL_path);
            HttpURLConnection connection=(HttpURLConnection)url.openConnection();
            connection.setConnectTimeout(3000);
            connection.setDoInput(true);
　　　　　　　　　connection.setDoOutput(true);
　　　　　　　　　//设置提交数据方式
　　　　　　　　　connection.setRequestMethod("POST");
            //设置手机端访问服务器端时请求头信息（http协议）
            //设置请求的类型为文本类型
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            //设置请求体的长度
            connection.setRequestProperty("Content-Length", String.valueOf(mydata.length));
            
            OutputStream outputStream=connection.getOutputStream();
            outputStream.write(mydata);
            
            return changeInputStream(connection.getInputStream(), "utf-8");
            
        }catch(Exception e){
            
        }
        return null;
    }
    
    /**
     * 强输入流转换为字符串输出到内存
     * @param inputStream
     * @param encode
     * @return
     */
    private static String changeInputStream(InputStream inputStream,String encode){
        ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
        byte[] buffer=new byte[1024];
        int length=0;
        try {
            while(-1!=(length=inputStream.read(buffer))){
                outputStream.write(buffer, 0, length);
            }
            return new String(outputStream.toByteArray(), "encode");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        return null;
    }
    public static void main(String[] args) {
        Map<String, String> parames=new HashMap<String,String>();
        parames.put("username", "admin");
        parames.put("password", "admin");
        sendPostMessage(parames, "utf-8");
    }
}