Java--Http向服务端提交字条串数据

package com.joye3g.http;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.util.Log;


public class UploadFile {
	// 上传代码，第一个参数，为要使用的URL，第二个参数，为提交的内容
	public static String post(String actionUrl, String jsonData) throws IOException {

		URL uri = new URL(actionUrl);
		HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
		conn.setReadTimeout(30 * 1000);
		conn.setRequestMethod("POST"); // Post方式
		conn.setDoOutput(true);// 允许输出
		conn.setRequestProperty("connection", "keep-alive"); //客户端到服务器端的连接持续有效
		conn.setRequestProperty("Content-Type", "application/x-javascript; charset=UTF-8");
		DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
		outStream.write(jsonData.getBytes());
		outStream.flush();
		// 得到响应码
		String result = "-1";  //-1请示请求失败
		if(conn.getResponseCode()==200){
			InputStream in = conn.getInputStream();
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			result = br.readLine();
			Log.e("System.out.println", result);
			br.close();
			in.close();
		}
		outStream.close();
		conn.disconnect();
		return result;
	}
}