如图我已经获取了数据了,但是在遍历的时候为什么只出来一行记录?明明有九行
前端代码
<%--
Created by IntelliJ IDEA.
Date: 2023/8/14
Time: 12:43
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>评论区</title>
</head>
<body>
ID:<input type="text" name="id" id="id"/><br><br>
评论:<textarea name="comment" id="words" required></textarea><br><br>
<button onclick="setDate()">发表评论</button><br><br>
ID:<input type="text" id="commentID" placeholder="请在此输入要获取的ID值">
<button onclick="getComments()">获取评论</button>
<div id="comments"></div>
</body>
<script type="text/javascript">
function setDate() {
const time = new Date();
const data = {
id : document.getElementById("id").value,
comment : document.getElementById("words").value,
time : time.toLocaleDateString()
}
var xhr =new XMLHttpRequest()
xhr.open("POST","/addComment",true)
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.onreadystatechange = function () {
if(xhr.status === 200 && xhr.readyState === 4){
console.log("请求发送成功,服务器端口响应全部数据!")
}
}
xhr.send(JSON.stringify(data));
xhr.timeout = 2000
xhr.timeout =function () {
alert("超时!")
}
xhr.onerror =function () {
alert("网络异常!")
}
}
getComments()
function getComments() {
const comments = document.getElementById("comments")
comments.value = ''
const commentID =document.getElementById("commentID").value
const xhr = new XMLHttpRequest();
xhr.open("GET","/getComment?id="+commentID,true);
xhr.onreadystatechange = function (){
if (xhr.status === 200 && xhr.readyState ===4){
let data =JSON.parse(xhr.responseText)
console.log(data)
for(var i =0 ; i<data.length ; i++){
comments.innerHTML = data[i].id+data[i].comment+data[i].time+"<br/>"
}
}
}
xhr.send()
xhr.timeout = 2000
xhr.timeout =function () {
alert("超时!")
}
xhr.onerror =function () {
alert("网络异常!")
}
}
</script>
</html>
