请老师看看问题
来源：2-8 自由编程
披着鱼皮的猫
2019-05-06 14:22:10
点击按钮之后没反应，是哪里拼写错误了吗
Employees.java
public class Employees {
private String name;
private String position;
private String depart;
//构造方法
public Employees(String name, String position, String depart) {
super();
this.name = name;
this.position = position;
this.depart = depart;
}
public Employees() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPosition() {
return position;
}
public void setPosition(String position) {
this.position = position;
}
public String getDepart() {
return depart;
}
public void setDepart(String depart) {
this.depart = depart;
}
}EmployeeServlet
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 EmployeeServlet
*/
@WebServlet("/Servlet")
public class EmployeeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public EmployeeServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Employees> list = new ArrayList<Employees>();
list.add(new Employees("小红","职员","人事部"));
list.add(new Employees("小明","职员","技术部"));
list.add(new Employees("小白","经理","无线事业部"));
String json = JSON.toJSONString(list);
System.out.println(json);
response.setContentType("text/html;charset=UTF-8");
response.getWriter().println(json);
}
}employee.jsp
<%@ 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>
<button id="btn1">员工列表</button>
<button id="btn2">职位列表</button>
<button id="btn3">部门列表</button>
<div id="con"></div>
<script type="text/javascript">
//1.创建XmlHttpRequesr对象
var xmlHttp;
xmlhttp = new XMLHttpRequest();
console.log(xmlhttp);
//2.发送Ajax请求
xmlhttp.open("GET","/Ajax/Servlet",true);
xmlhttp.send();
//3.处理服务器响应
//员工姓名
xmlhttp.onreadyStatechange=function() {
if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) {
var text = xmlhttp.responseText;
var json = JSON.parse(text);
document.getElementById("btn1").onclick=function() {
var html="";
for(var i=0;i<json.length;i++) {
html = html+json[i].name+"</br>";
}
document.getElementById("con").innerHTML = html;
}
}
}
//员工职位
xmlhttp.onreadyStatechange=function() {
if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) {
var text = xmlhttp.responseText;
var json = JSON.parse(text);
document.getElementById("btn2").onclick=function() {
var html="";
for(var i=0;i<json.length;i++) {
html = html+json[i].position+"</br>";
}
document.getElementById("con").innerHTML = html;
}
}
}
//部门列表
xmlhttp.onreadyStatechange=function() {
if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) {
var text = xmlhttp.responseText;
var json = JSON.parse(text);
document.getElementById("btn3").onclick=function() {
var html="";
for(var i=0;i<json.length;i++) {
html = html+json[i].depart+"</br>";
}
document.getElementById("con").innerHTML = html;
}
}
}
</script>
</body>
</html>写回答
5回答
-
同学你好！同学的代码有两处有问题呢
点击事件写错了
应该是如下写法：
同学检验状态是写错了呢，应该是readyState同学写成了readyStatechange
如果我的回答解决了你的疑惑，请采纳，祝学习愉快~
1 -
披着鱼皮的猫
提问者
2019-05-06
55555再次调整了之后还是没有反应，控制台也不给我报错55
employee.jsp
<%@ 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> <button id="btn1">员工列表</button> <button id="btn2">职位列表</button> <button id="btn3">部门列表</button> <div id="con"></div> <script type="text/javascript"> //1.创建XmlHttpRequesr对象 var xmlHttp; xmlhttp = new XMLHttpRequest(); console.log(xmlhttp); //员工姓名 document.getElementById("btn1").click(function(){ //2.发送Ajax请求 xmlhttp.open("GET","/Ajax/Servlet",true); xmlhttp.send(); //3.处理服务器响应 xmlhttp.onreadystatechange=function(){ if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) { var text = xmlhttp.responseText; var json = JSON.parse(text); var html=""; for(var i=0;i<json.length;i++){ var emp = json[i]; html = html+emp.name+"</br>"; } document.getElementById("con").innerHTML = html; } } }); //员工职位 document.getElementById("btn2").click(function() { //2.发送Ajax请求 xmlhttp.open("GET","/Ajax/Servlet",true); xmlhttp.send(); //3.处理服务器响应 xmlhttp.onreadystatechange=function() { if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) { var text = xmlhttp.responseText; var json = JSON.parse(text); var html=""; for(var i=0;i<json.length;i++) { var emp = json[i]; html = html+emp.position+"</br>"; } document.getElementById("con").innerHTML = html; } } }); //部门列表 document.getElementById("btn3").click(function() { //2.发送Ajax请求 xmlhttp.open("GET","/Ajax/Servlet",true); xmlhttp.send(); //3.处理服务器响应 xmlhttp.onreadystatechange=function() { if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) { var text = xmlhttp.responseText; var json = JSON.parse(text); var html=""; for(var i=0;i<json.length;i++) { var emp = json[i]; html = html+emp.depart+"</br>"; } document.getElementById("con").innerHTML = html; } } }); </script> </body> </html>0 -
好帮手慕柯南
2019-05-06
同学你好！同学的括号匹配有问题呢，建议同学仔细检查一下
同学以后遇到类似点击没有反映的问题，可以先看一下浏览器的控制台是否报错，然后根据报错信息排查原因，这样可以提高同学发现和解决问题的能力。有助于同学学习效果的提升~祝学习愉快~
0 -
披着鱼皮的猫
提问者
2019-05-06
调整了一下顺序之后还是点击按钮没有反应
employee.jsp
<%@ 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> <button id="btn1">员工列表</button> <button id="btn2">职位列表</button> <button id="btn3">部门列表</button> <div id="con"></div> <script type="text/javascript"> //1.创建XmlHttpRequesr对象 var xmlHttp; xmlhttp = new XMLHttpRequest(); console.log(xmlhttp); //员工姓名 document.getElementById("btn1").onclick=function() { //2.发送Ajax请求 xmlhttp.open("GET","/Ajax/Servlet",true); xmlhttp.send(); //3.处理服务器响应 xmlhttp.onreadyStatechange=function() { if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) { var text = xmlhttp.responseText; var json = JSON.parse(text); var html=""; for(var i=0;i<json.length;i++) { html = html+json[i].name+"</br>"; } document.getElementById("con").innerHTML = html; } } } //员工职位 document.getElementById("btn2").onclick=function() { //2.发送Ajax请求 xmlhttp.open("GET","/Ajax/Servlet",true); xmlhttp.send(); //3.处理服务器响应 xmlhttp.onreadyStatechange=function() { if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) { var text = xmlhttp.responseText; var json = JSON.parse(text); var html=""; for(var i=0;i<json.length;i++) { html = html+json[i].position+"</br>"; } document.getElementById("con").innerHTML = html; } } //部门列表 document.getElementById("btn3").onclick=function() { //2.发送Ajax请求 xmlhttp.open("GET","/Ajax/Servlet",true); xmlhttp.send(); //3.处理服务器响应 xmlhttp.onreadyStatechange=function() { if(xmlhttp.readyStatechange==4&&xmlhttp.status==200) { var text = xmlhttp.responseText; var json = JSON.parse(text); var html=""; for(var i=0;i<json.length;i++) { html = html+json[i].depart+"</br>"; } document.getElementById("con").innerHTML = html; } } </script> </body> </html>0 -
好帮手慕柯南
2019-05-06
同学你好！要点击按钮之后再去发送ajax请求哦，可参考如下代码：
如果我的回答解决了你的疑惑，请采纳，祝学习愉快~
0
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