jsp使用jquery通过ajax方式访问servlet



jsp使用jquery通过ajax方式访问servlet。摘自：http://hi.baidu.com/mengxingle_13/blog/item/358c4319c3994abe4bedbce2.html【jquery $.ajax({})例子 java】

jsp
<%@ page language=”java” contentType=”text/html” pageEncoding=”utf-8″%>
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”>
<html>
<head>
 
  <title>My JSP ‘index.jsp’ starting page</title>
<meta http-equiv=”content” content=”text/html;charset=utf-8″>
<!–
<link rel=”stylesheet” type=”text/css” href=”styles.css”>
–>
<script type=”text/javascript” src=”jquery-1.3.2.js”></script>
<script type=”text/javascript”>
function sub()
{
$.ajax({
type:”post”,//请求方式
url:”./test”,//发送请求地址
data:{//发送给数据库的数据
username:$(“#username”).val(),
content:$(“#content”).val()
},
//请求成功后的回调函数有两个参数
success:function(data,textStatus){
  $(“#resText”).html(data);
}
});
}
</script>
</head>
<body>
<form action=”./test” id=”form1″ method=”post”>
<p>评论：</p>
<p>姓名：<input type=”text” name=”username” id=”username”/></p>
<p>内容：<textarea name=”content” id=”content” rows=”2″ cols=”20″></textarea></p>
<p><input type=”button” id=”send” value=”提交” onclick=”sub();”/></p>
</form>
<div>
已有评论：
</div>
<div id=”resText”>
</div>
</body>
</html>
java代码
package com;
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 test extends HttpServlet {
public void service(HttpServletRequest request, HttpServletResponse response)
  throws ServletException, IOException {
  //处理中文问题
request.setCharacterEncoding(“utf-8″);
response.setContentType(“text/html;charset=utf-8″);
System.out.println(“start…………”);
String username=request.getParameter(“username”);
String content=request.getParameter(“content”);
//username=new String(username.getBytes(“gb2312″),”utf-8″);
PrintWriter out = response.getWriter();
out.write(username);
System.out.println(“username>>==”+username);
out.write(content);
out.flush();
out.close();
System.out.println(“end”);
}
}