老师看看,点击按钮无响应
package com.ajax.practice; public class Employee { private String name; private String job; private String department; public Employee() { } public Employee(String name, String job, String department) { super(); this.name = name; this.job = job; this.department = department; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getJob() { return job; } public void setJob(String job) { this.job = job; } public String getDepartment() { return department; } public void setDepartment(String department) { this.department = department; } }
package com.ajax.practice; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.alibaba.fastjson.JSON; /** * Servlet implementation class ajaxEmp */ @WebServlet("/ajaxEmp") public class ajaxEmp extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { List list=new ArrayList(); list.add(new Employee("小红","职员","人事部")); list.add(new Employee("小明","经理","技术部")); list.add(new Employee("小白","职员","无线事业部")); String json=JSON.toJSONString(list); response.setContentType("text/html;charset=UTF-8"); response.getWriter().println(json); } }
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <div align="center"> <input style="width:200px" id="btn0" type="button" value="员工列表"> <input style="width:200px" id="btn1" type="button" value="职位列表"> <input style="width:200px" id="btn2" type="button" value="部门列表"> </div> <div id="content" align="center"></div> <script type="text/javascript"> var xmmlhttp; if(windows.XMLHttpRequest){ xmlhttp=new XMLHttpRequest(); }else{ xmlhttp=new ActiveXOject("Microsoft.XMLHttp") } xmlhttp.open("GET","/jQueryPractice/ajaxEmp",true); xmlhttp.send(); xmlhttp.onreadyStatechange=function(){ if(xmlhttp.readyState==4&&xmlhttp.status==200){ var text=xmlhttp.responseText; var json=JSON.parse(text); //员工列表 document.getElementById("btn0").onclick=function(){ var html=""; var num=0; for(var i=0;i<json.length;i++){ html+=json[i].name+"<br>"; } document.getElementById("content").innerHTML=html; } //职位列表 document.getElementById("btn1").onclick=function(){ var html=""; var num=0; for(var i=0;i<json.length;i++){ var job=json[i].job; html+=json[i].job+"<br>"; } document.getElementById("content").innerHTML=html; //部门列表 document.getElementById("btn2").onclick=function(){ var html=""; for(var i=0;i<json.length;i++){ html+=json[i].department+"<br>"; } document.getElementById("content").innerHTML=html; } } } } </script> </body> </html>
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同学你好!
1.在你的代码中有个小问题,这里应该是window,同学多加了s
2.点击按钮没有反应是因为同学在点击按钮后没有去发送ajax请求,同学可以参考如下代码(以员工列表为例):
如果我的回答解决了你的疑惑,请采纳,祝学习愉快~
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