IDEA，报错500
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta charset="utf-8"/>
<title>ford-用户登录</title>
<base href="http://localhost:8080/BWCFdatabase/">
<link ) rel="shortcut icon" href="favicon.ico" type="http://localhost:8080/BWCFdatabase/image/vnd.microsoft.icon">
<link ) rel="icon" href="theme.ico" type="image/vnd.microsoft.icon">
<link rel="stylesheet" href="http://localhost:8080/BWCFdatabase/assets/libs/layui/css/layui.css?20221225140425" />
<link rel="stylesheet" href="http://localhost:8080/BWCFdatabase/assets/css/login.css?20221225140425" media="all">
<link rel="stylesheet" href="http://localhost:8080/BWCFdatabase/assets/css/foxnic-web.css?20221225140425">
<link rel="stylesheet" href="http://localhost:8080/BWCFdatabase/console/pear/component/pear/css/pear-support.css?20221225140425">
<script>var foxnic_cachekey="20221225140425";</script>
<style>
#login-panel {
width: 300px;
border-radius: 16px;
position: absolute;
background-color: #fff;
left: 100px;
top: 100px;
box-shadow: 0px 0px 4px 4px rgba(0, 0, 0, .15);
display: flex;
flex-direction: column;
align-content: center;
align-items: center;
padding-top: 20px;
opacity:0.0;
}
.logo {
width: 80px;
height: auto;
}
.title {
margin-top: 16px;
margin-bottom: 8px;
font-weight: 700;
font-size: 15px;
color: #444;
}
.tool-button {
width: 40px;
height: 40px;
padding: 2px;
font-size: 18px;
cursor: pointer;
background: #FFF;
text-align: center;
line-height: 40px;
margin-bottom: 0px;
border-radius: 50%;
position: absolute;
color: #acacac;
right: 24px;
bottom: 28px;
display: block;
-webkit-box-shadow: 0px 1px 20px 0px rgb(0 0 0 / 10%), inset 0px -1px 0px 0px rgb(0 0 0 / 10%);
box-shadow: 0px 1px 20px 0px rgb(0 0 0 / 10%), inset 0px -1px 0px 0px rgb(0 0 0 / 10%);
}
.lang-icon {
font-size: 24px;
}
.lang-icon:hover {
font-size: 24px;
color: #333;
}
span{
color: red;
}
</style>
</head>
<body style="background-image:url(http://localhost:8080/BWCFdatabase/assets/images/bg_login_2.png);background-repeat:no-repeat;background-size:cover;">
<div class="login-body">
<div id="login-panel" class="layui-form-pane">
<img class="logo" src="http://localhost:8080/BWCFdatabase/assets/images/foxnic.png">
<div class="title">百旺长福数据中心</div>
<form action="http://localhost:8080/BWCFdatabase/registServlet" method="post">
<div class="layui-form-item">
<label class="layui-form-label"><i class="layui-icon layui-icon-username"></i></label>
<div class="layui-input-block">
<input name="username" type="text" lay-verify="required" placeholder="账号" value=""
class="layui-input">
<%
String loginMsg = (String)request.getAttribute("login_msg");
%>
<span ><%=loginMsg %></span>
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label"><i class="layui-icon layui-icon-password"></i></label>
<div class="layui-input-block">
<input name="password" type="password" lay-verify="required" placeholder="密码" value=""
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<button lay-filter="login-submit" id="login-submit" class="layui-btn layui-btn-fluid" style="background-color: #f56c6c;" lay-submit>登 录</button>
</div>
</form>
</div>
</div>
<div class="login-footer" style="background-color: rgb(0,0,0,0.0);height: 32px;padding-bottom: 0px">
<p><a target="_blank">百旺长福数据中心</a></p>
</div>
<div class="tool-button foxnic-lang">
<i class="layui-icon layui-icon-website lang-icon" update-text="0"></i>
</div>
<script type="text/javascript" src="http://localhost:8080/BWCFdatabase/module/global.js?20221225140425"></script>
<script type="text/javascript" src="http://localhost:8080/BWCFdatabase/assets/libs/layui/layui.js?20221225140425"></script>
<script type="text/javascript" src="http://localhost:8080/BWCFdatabase/module/Math.uuid.js?20221225140425"></script>
<script>
var LANGUAGES = [{"code":"auto","property":"auto","text":"\u81EA\u52A8\u8BC6\u522B"},{"code":"defaults","property":"defaults","text":"\u9ED8\u8BA4\u8BED\u8A00"},{"code":"zh_cn","property":"zhCn","text":"\u4E2D\u6587\u7B80\u4F53"},{"code":"zh_tw","property":"zhTw","text":"\u4E2D\u6587(\u53F0\u6E7E)"},{"code":"zh_hk","property":"zhHk","text":"\u4E2D\u6587(\u9999\u6E2F)"},{"code":"zh_mo","property":"zhMo","text":"\u4E2D\u6587(\u6FB3\u95E8)"},{"code":"en_us","property":"enUs","text":"English-US"},{"code":"en_gb","property":"enGb","text":"English-UK"},{"code":"ko_kr","property":"koKr","text":"\uD55C\uAD6D\uC5B4"},{"code":"ja_jp","property":"jaJp","text":"\u65E5\u672C\u8A9E"},{"code":"confuse","property":"confuse","text":"\u6DF7\u6DC6"}];
var USER_LANGUAGE_PROP="zhCn";
var USER_LANGUAGE_CODE="zh_cn";
var LANGUAGE_RANGE = ["defaults","auto","zh_cn","en_gb","zh_tw"];
</script>
<script>
localStorage.setItem("theme","PEAR");
if(window!=top) top.location="/login.html"
layui.config({
base: 'http://localhost:8080/BWCFdatabase/module/'
}).use(['form','settings','dropdown'], function () {
let $ = layui.jquery;
function updatePosition() {
var fullHeight = $(window).height();
var fullWidth = $(window).width();
var formHeight = $("#login-panel").height();
var formWidth = $("#login-panel").width();
var formTop = (fullHeight - formHeight) * 0.4;
var formLeft = (fullWidth - formWidth) / 2;
$("#login-panel").css("top", formTop + "px");
$("#login-panel").css("left", formLeft + "px");
console.log("resize:"+formTop+","+formLeft);
}
updatePosition();
$("#login-panel").css("display","");
setTimeout(function (){
$("#login-panel").animate({
opacity:'1.0'
},1000);
},16)
$(window).on('resize', updatePosition);
//debugger
});
</script>
<script type="text/javascript" src="http://localhost:8080/BWCFdatabase/login.js?20221225140425"></script>
</body>
</html>
HTTP状态 500 - 内部服务器错误
类型 异常报告
描述 服务器遇到一个意外的情况，阻止它完成请求。
例外情况
java.lang.NullPointerException
com.bwcf.web.RegistServlet.doPost(RegistServlet.java:33)
javax.servlet.http.HttpServlet.service(HttpServlet.java:682)
javax.servlet.http.HttpServlet.service(HttpServlet.java:765)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
):注意 主要问题的全部 stack 信息可以在 server logs 里查看
Apache Tomcat/8.5.85
package com.bwcf.web;
import com.bwcf.pojo.User;
import com.bwcf.service.UserService;
import com.bwcf.service.impl.UserServiceImpl;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class RegistServlet extends HttpServlet {
private UserService userService = new UserServiceImpl();
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//获取请求的参数
String username = req.getParameter("username");
String password = req.getParameter("password");
//调用userService.login()登录处理业务
User loginUser = userService.login(new User(null, username, password, null));
//如果等于null说明登录失败
if (loginUser == null){
// 跳回登录界面
req.setAttribute("login_msg", "账户或密码不正确");
RequestDispatcher rd = req.getRequestDispatcher("index.jsp");
rd.forward(req,resp);
} else {
//登录成功
req.getRequestDispatcher("../web/pages/index11.jsp").forward(req,resp);
}
}
}
