java 发送post请求

package com.chengyi.cpms.dock;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

import common.Logger;

/**
* <li>Title: DockExecutor.java</li>
* <li>Project: CPMS</li>
* <li>Package: com.chengyi.cpms.dock</li>
* <li>Description: 对接执行类-发送url请求</li>
* <li>Copyright: Copyright (c) 2010</li>
* <li>Company: Crescent Studio </li>
* <li>Created on 2010-10-27 下午02:50:39</li>
*
* @author chun_chang
* @version 1.0.0.0
*
*/
public class DockExecutor {
private static final Logger log = Logger.getLogger(DockExecutor.class);

/**
* 描述：sendUrl 发送URL的post请求
* @param urlStr
* @param params
* @return
* @CreateOn 2010-10-28  下午01:39:00
* @author chun_chang
*/
public String sendUrl(String urlStr, String params) {
log.info(urlStr + "?" + params);
PrintWriter out = null;
BufferedReader in = null;
StringBuffer result = new StringBuffer();
try {
URL realUrl = new URL(urlStr);
// 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");
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);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(params);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line = "";
while ((line = in.readLine()) != null) {
result.append(line);
}
log.info(result);
} catch (Exception e) {
log.error(DockExecutor.class.getName(), e);
} finally {
try {
if (out != null) {
out.close();
out = null;
}
if (in != null) {
in.close();
in = null;
}
} catch (Exception ex) {
log.error(this.getClass().getName(), ex);
}
}
return result.toString();
}

public static void main(String args[]){
String urlStr = "http://mail.163.com";
String params = "aa=aaa&bbb=bbb";
new DockExecutor().sendUrl(urlStr, params);
}
}