晚上好，我有一个大问题，我不知道该如何解决，我的问题是我想在我的页面jsp中编写我的Java代码，所以我使用scriptlet ，但是当我想在上面写时如果我想放一个字符串，我放了S，然后单击ctrl +空格，以便它使我完成单词String的工作，但是没有它不能识别连接的同一事物，结果集，没有结果。当我执行它时会显示错误
org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP
PWC6199：生成的servlet错误：源值1.5已过时，将在以后的版本中删除
PWC6199：生成的servlet错误：目标值1.5已过时，将在以后的版本中删除
PWC6199：生成的servlet错误：要禁止显示有关过时选项的警告，请使用-Xlint：-options。
PWC6197：jsp文件：/WEB-INF/Acceuil_proprietaire.jsp中的第10行出现错误PWC6199：生成的servlet错误：找不到标志符号：类Connectionenter code here位置：类org.apache.jsp.WEB_002dINF.Acceuil_005fproprietaire_jsp
<%--
Document : Acceuil_proprietaire
Created on : 3 oct. 2019, 20:13:00
Author : hp
--%>
<%@page import="controller.Cnx"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%
Connection c=Cnx.getcnx();
%>
<html class="no-js" lang="en">
<!--<![endif]-->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Gestion parkings</title>
<meta name="description" content="Sufee Admin - HTML5 Admin Template">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="apple-touch-icon" href="apple-icon.png">
<link rel="shortcut icon" href="favicon.ico">
<link rel="stylesheet" href="vendors/bootstrap/dist/css/bootstrap.min.css">
<link rel="stylesheet" href="vendors/font-awesome/css/font-awesome.min.css">
<link rel="stylesheet" href="vendors/themify-icons/css/themify-icons.css">
<link rel="stylesheet" href="vendors/flag-icon-css/css/flag-icon.min.css">
<link rel="stylesheet" href="vendors/selectFX/css/cs-skin-elastic.css">
<link rel="stylesheet" href="vendors/jqvmap/dist/jqvmap.min.css">
<link rel="stylesheet" href="assets/css/style.css">
<link rel="stylesheet" href="css/ccs_accueil_proprietaire.css">
<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,600,700,800' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<script src="https://kit.fontawesome.com/e3fd0d5f24.js" crossorigin="anonymous"></script>
</head>
<body>
<%
String msg=(String) request.getAttribute("msg");
if(msg!=null && !msg.equals("") ){
%>
<script>
$(document).ready(function (){
$("#myModal").modal('toggle');
});
</script>
<% } %>
<!-- Left Panel -->
<aside id="left-panel" class="left-panel">
<nav class="navbar navbar-expand-sm navbar-default" style="flex-flow:column wrap;">
<div class="navbar-header">
<a class="navbar-brand" href="#">Gestion parkings</a>
<a class="navbar-brand hidden" href="./"><img src="images/logo2.png" alt="Logo"></a>
</div>
<div id="main-menu" class="main-menu collapse navbar-collapse">
<ul class="nav navbar-nav">
<li class="nav-item ">
<a href="#" class="nav-link" aria-haspopup="true" aria-expanded="false"> <i class="fas fa-arrow-alt-circle-right" style="margin-right: 20px;" selected></i>Gestion locaux</a>
</li>
<li class="nav-item ">
<a href="#" class="nav-link" aria-haspopup="true" aria-expanded="false"> <i class="fas fa-arrow-alt-circle-right" style="margin-right: 20px;"></i>Places</a>
</li>
<li class="nav-item ">
<a href="#" class="nav-link" aria-haspopup="true" aria-expanded="false"> <i class="fas fa-arrow-alt-circle-right" style="margin-right: 20px;"></i>Contrats</a>
</li>
</ul>
</div>
</nav>
</aside>
<nav class="navbar" style="height:70px;" id='nav-proprietaire'>
<ul class="nav navbar-nav">
<li class="nav-item ">
<a href="Page_de_cnx" class="nav-link" aria-haspopup="true" aria-expanded="false" style="padding-left: 1470px; text-transform: uppercase"> <i class="fas fa-exclamation-circle" style="margin-right: 20px;"></i>Déconnection</a>
</li>
</ul>
</nav>
<div id='divformproprietaire'>
<form method="POST" action='Gestion_des_locaux'>
<div class="form-group">
<label class='labelproprietaire'>Nom du local :</label>
<input type="text" class="form-control" name="nomlocal" id="nomlocal" aria-describedby="nomlocalHelp" placeholder="Enter the name of local">
</div>
<div class="form-group">
<label class='labelproprietaire'>Nom proprietaire :</label>
<input type="text" class="form-control" id="nomproprietaire" placeholder="Entrer votre nom" name="nomproprietaire">
`enter code here`</div>
`enter code here`<div class="form-group">
`enter code here`<label class='labelproprietaire'>Adresse du local :</label>
<input type="text" class="form-control" id="adresselocal" placeholder="Entrer l'adresse du local" name="adresselocal">
</div>
<div class="form-group">
<label class='labelproprietaire'>Nombre de place disponible :</label>
<input type="number" class="form-control" id="nbrplacedispo" placeholder="Entrer le nombre de place disponible dans le local" name="nbrplace">
</div>
<div class="form-group">
<label class='labelproprietaire'>Superficie :</label>
<input type="text" class="form-control" id="Superficielocal" placeholder="Entrer la superficie du local" name="superficielocal">
</div>
<div id='divbtnaddlocal'>
<button type="submit" class="btn btn-primary" id='btnajouterlocal' style='vertical-align: 0;' name='action' value='ajouter'><i class="fas fa-plus-circle"></i>Ajouter</button>
</div>
</form>
</div>
<table class="table table-hover">
<thead>
<tr class="table-active">
<th scope="col">Nom local</th>
<th scope="col">Nom proprietaire</th>
<th scope="col">Adresse local</th>
<th scope="col">Nombre de place</th>
<th scope="col">Superficie</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row"></th>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title">Information</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<!-- Modal body -->
<div class="modal-body">
${msg}
</div>
<!-- Modal footer -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-dismiss="modal">Fermer</button>
</div>
</div>
</div>
</div>
<!-- /#left-panel -->
<!-- Left Panel -->
<!-- Right Panel -->
<!-- Right Panel -->
<script src="vendors/jquery/dist/jquery.min.js"></script>
<script src="vendors/popper.js/dist/umd/popper.min.js"></script>
<script src="vendors/bootstrap/dist/js/bootstrap.min.js"></script>
<script src="assets/js/main.js"></script>
<script src="vendors/chart.js/dist/Chart.bundle.min.js"></script>
<script src="assets/js/dashboard.js"></script>
<script src="assets/js/widgets.js"></script>
<script src="vendors/jqvmap/dist/jquery.vmap.min.js"></script>
<script src="vendors/jqvmap/examples/js/jquery.vmap.sampledata.js"></script>
<script src="vendors/jqvmap/dist/maps/jquery.vmap.world.js"></script>
<script>
(function($) {
"use strict";
jQuery('#vmap').vectorMap({
map: 'world_en',
backgroundColor: null,
color: '#ffffff',
hoverOpacity: 0.7,
selectedColor: '#1de9b6',
enableZoom: true,
showTooltip: true,
values: sample_data,
scaleColors: ['#1de9b6', '#03a9f5'],
normalizeFunction: 'polynomial'
});
})(jQuery);
</script>
</body>
</html>
您的IDE无法自动完成“连接”，因为您没有将Connection类导入到JSP文件中。
您需要为Connection添加导入语句，如下所示：
<%@page import="java.sql.Connection"%>
或者，您可能有点懒，只需导入整个java.sql包：
<%@page import="java.sql.*"%>
一旦正确设置了文件，IDE就应该能够正确自动完成。