http://download.csdn.net/detail/poiuy1991719/8594485

package com.west.test.httpclient;

/**

 *01：定义访问路径

 *com.west.test.httpclient.PostServlet

 */

public class URLUtil {

    public static final String HttpClient_002="http://localhost:8080/httpClient_002/";//访问本地项目2路径

    public static final String POST_CONTENT=HttpClient_002+"PostContent";

}

package com.west.test.httpclient;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.HttpStatus;

import org.apache.commons.httpclient.NameValuePair;

import org.apache.commons.httpclient.methods.PostMethod;

import javax.servlet.ServletException;

public class PostServlet extends HttpServlet {

    @Override

    protected void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        System.out.println("httpClient_001:doGet方式提交");

        System.out.println("========PostServlet start=========");

        /**02：定义实例化对象*/

        HttpClient httpClient = new HttpClient();

        //03：Post需要创建PostMethod

        PostMethod method=new PostMethod(URLUtil.POST_CONTENT);

        //04：创建NameValuePair对象，保存需要存入到路径的值

        NameValuePair name=new NameValuePair("name", "zhagnsan");

        System.out.println("NameValuePair:name:"+name.toString());

        NameValuePair password=new NameValuePair("password", "password:123321");

        //05：利用method设置需要加入到访问路径后面的值（相当于url传值）

        method.setRequestBody(new NameValuePair[]{name,password});

        String rt="";

        try {

            //06：提交数据，并且获取提交结果

            int status=httpClient.executeMethod(method);

            //07：HttpStatus.SC_OK=200，表明提交数据成功

            if(status==HttpStatus.SC_OK){

                //08：获取返回的字符串

                rt=method.getResponseBodyAsString();

                System.out.println("httpClient_001得到httpClient_002返回的字符串：rt："+rt);

            }

        } catch (Exception e) {

            e.printStackTrace();

            System.out.println("网络连接失败，请联系管理员！");

        }

        //释放HttpClient资源

        method.releaseConnection();

        /**09：编写outMessage()方法*/

        outMessage(response, rt);

    }

    /**09：编写outMessage()方法*/

    public void outMessage(HttpServletResponse response, String message) {

        try {

            PrintWriter out = response.getWriter();

            out.print(message);

            out.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_ID" version="2.5"

 xmlns="http://java.sun.com/xml/ns/javaee"

 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

 <display-name>test</display-name>

  <servlet>

    <servlet-name>PostServlet</servlet-name>

    <servlet-class>com.west.test.httpclient.PostServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>PostServlet</servlet-name>

    <url-pattern>/PostServlet</url-pattern>

  </servlet-mapping>

 <session-config>

  <session-timeout></session-timeout>

 </session-config>

 <welcome-file-list>

  <welcome-file>index.jsp</welcome-file>

 </welcome-file-list>

</web-app>

package com.test.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.UnsupportedEncodingException;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class PostContent  extends HttpServlet {

    @Override

    protected void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        System.out.println("=========PostContent start============");

        System.out.println("httpClient_002:doPost方式执行");

        String name=request.getParameter("name");

        String password=request.getParameter("password");

        String reStr="httpClient_002:name="+name+"======password="+password;

        System.out.println("reStr："+reStr);

        outMessage(response, reStr);

    }

    public void outMessage(HttpServletResponse response, Object message) {

        try {

            PrintWriter out = response.getWriter();

            out.print(message);

            out.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_ID" version="2.5"

 xmlns="http://java.sun.com/xml/ns/javaee"

 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

 <display-name>test002</display-name>

  <servlet>

    <servlet-name>PostContent</servlet-name>

    <servlet-class>com.test.servlet.PostContent</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>PostContent</servlet-name>

    <url-pattern>/PostContent</url-pattern>

  </servlet-mapping>

 <welcome-file-list>

  <welcome-file>index.jsp</welcome-file>

  <welcome-file>default.html</welcome-file>

 </welcome-file-list>

</web-app>