urlconnection代码

package com.yucheng.connection;

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

public class TestConnection {

	public static void main(String[] args) {

		/**

		 * 作为客户端，先向服务器发送数据，再从接受服务器返回的数据

		 */

		try {

			// 1.打开连接设置各种参数

			URL url = new URL("http://www.xxx.com:8080/crw/service/webserviceprovider");

			HttpURLConnection conn = (HttpURLConnection) url.openConnection();

			// 设置请求方法，这是HttpURLConnection实现类的方法

			conn.setRequestMethod("POST");

			// 设置http请求头

			conn.setRequestProperty("accept", "*/*");

			conn.setRequestProperty("connection", "keep-Alive");

			conn.setRequestProperty("content-type", "text/xml;charset=UTF-8");

			// URLConnection可用于输出和输入

			conn.setDoOutput(true);

			conn.setDoInput(true);

			// 请求超时时间

			conn.setConnectTimeout(3000);

			// 2.客户端向服务器发送数据

			OutputStream out = conn.getOutputStream();

			out.write("ssskkk".getBytes()); // 在服务器用io接收参数为字节数组 String str = new String(bytes[] b,"utf-8");

			out.flush();

			// 3.接收服务器返回的数据

			InputStream in = conn.getInputStream();

			BufferedReader br = new BufferedReader(new InputStreamReader(in));

			StringBuilder sb = new StringBuilder();

			String line = null;

			while ((line = br.readLine()) != null) {

				sb.append(line);

			}

			String returnMsg = sb.toString();

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

}