基本的JSP中调用Ajax与Servlet进行数据交互

56 阅读 0 评论 37 点赞

我是靠谱客的博主危机汽车，最近开发中收集的这篇文章主要介绍基本的JSP中调用Ajax与Servlet进行数据交互，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

首先创建jsp页面中然后在页面中写入js代码!

<span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html; charset=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>
<base href="<%=basePath%>">
<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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="<%=path%>/js/jquery-2.1.1.min.js" ></script>
<script type="text/javascript">
function
sub(){
$.ajax({
type:"GET",
url:"/Ajaxex/testServlet",
data:{username:$("#name").val()},
statusCode: {404: function() {
alert('page not found'); }
},
success:function(data,textStatus){
$("#sp").html(data);
}
});
}
</script>
</head>
<body>
This is my JSP page. <br>
<input type="text" name="username" id="name">
<br>
<input type="submit" id="btn" οnclick="sub()">
<br>
result : <span id="sp"></span>
</body>
</html>
写一个Servlet类
package com.hal.servlet;
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;
import javax.xml.ws.Dispatch;
public class testServlet extends HttpServlet {
    /**
     *
     */
    private static final long serialVersionUID = 1L;
    /**
     * Constructor of the object.
     */
    public testServlet() {
        super();
    }
    /**
     * Destruction of the servlet. <br>
     */
    public void destroy() {
        super.destroy(); // Just puts "destroy" string in log
        // Put your code here
    }
    /**
     * The doGet method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to get.
     *
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text");
        String   username = request.getParameter("username");
        System.out.println(username);
        PrintWriter out = response.getWriter();
        out.write(username);
        request.getRequestDispatcher("index.jsp").forward(request, response);
        out.flush();
        out.close();
    }
    /**
     * The doPost method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to post.
     *
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text");
        PrintWriter out = response.getWriter();
        out.flush();
        out.close();
    }
    /**
     * Initialization of the servlet. <br>
     *
     * @throws ServletException if an error occurs
     */
    public void init() throws ServletException {
        // Put your code here
    }
}
配置web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Ajaxex</display-name>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>AjaxexServlet</servlet-name>
    <servlet-class>com.hal.servlet.AjaxexServlet</servlet-class>
  </servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>testServlet</servlet-name>
    <servlet-class>com.hal.servlet.testServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>AjaxexServlet</servlet-name>
    <url-pattern>/AjaxexServlet</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>testServlet</servlet-name>
    <url-pattern>/testServlet</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>
</span>