HttpClient_001_初步实现项目01的servlet，与项目02的servlet，之间数据访问

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>600</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>