javascript-ajax-json-java-servlet互相传值取值的学习心得

前几天突然想学习以下jquery easyui 但是里面涉及到了json的知识，于是恶补起来ajax知识，经过以上的查资料，终于弄清楚javascript-ajax-json-java-servlet互相传值取值,的过程，特此分享出来，希望能帮助到初学的朋友么，也为了日后自己查询是使用，好了闲话少说，看下面代码go！！

使用tomcat6.0

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
	
	
	    
	
	
	
	
	
  
  
  
    

    	
    	
    
   
  

UserActionServlet.java

package action;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UserActionServlet extends HttpServlet{

	@Override
	public void service(HttpServletRequest arg0, HttpServletResponse arg1)
			throws ServletException, IOException {
		//System.out.println(arg0.getParameter("json"));
		PrintWriter writer = arg1.getWriter();
		//将从javascript传过来的文本读取到，然后在将文本传回到客户端
		writer.print(arg0.getParameter("json"));
		writer.flush();
		writer.close();
	}
	
}

接下来配置web.xml文件

  
    index.jsp
  
  
  	UserServlet
  	action.UserActionServlet
  
  
  	UserServlet
  	/UserServlet