1.利用myecilpse建立一个web项目
2.导入需要的包：
commons-beanutils.jar
commons-collections-3.1.jar
commons-lang-2.3.jar
commons-logging-1.1.jar
ezmorph-1.0.6.jar
json-lib-2.1.jar
json-lib.2.2.2-jdk15.jar
3.建立index.jsp页面（记得导入jquery包）
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
function test()
{
//alert(1);
$.ajax({
url:'<%=path%>/HelloServlet',
dataType: "json",
data:{
name:"zhangsan",
password:"123123"
},
type :'GET',
success:function(data)
{
//alert(data.length);
//var stu = eval("(" + data + ")");
//alert( $(data).get(0).name);
//alert( $(data).get("age"));
}
});
} </script>
</head> <body>
<table>
<tr>
<td>姓名:</td>
<td><input type="text" id="userName" name="userName"></td>
</tr> <tr>
<td>密码:</td>
<td><input type="text" id="passWord" name="passWord"></td>
</tr> <tr>
<td><input type="button" value="提交" onclick="test();"></td>
</tr>
</table>
</body>
</html>
4.建立Servlet
public class HelloServlet extends HttpServlet
{
public HelloServlet()
{
super();
} public void destroy()
{
super.destroy(); // Just puts "destroy" string in log
// Put your code here
} public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
System.out.println("执行了-------------");
String name = (String)request.getParameter("name");
String password = (String)request.getParameter("password");
System.out.println(name + " ," + password); student stu = new student();
stu.setAge(18);
stu.setName("zhangsan");
JSONArray arr=JSONArray.fromObject(stu);
PrintWriter out = response.getWriter();
out.println(arr.toString());
out.flush();
out.close();
} public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{ } public void init() throws ServletException
{ } }
5.web.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
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_3_0.xsd"> <servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>com.milk.servlet.HelloServlet</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping> <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>