从控制器传递的列表数据不会重置Spring mvc

list data being passed from controller is not resetting Spring mvc

本文关键字：Spring mvc 数据 控制器 列表      更新时间：2023-09-26

嗨，我有一个spring mvc web应用程序。当控制器被调用时，它会调用sql数据库来获取所有用户。然后，它将该列表传递给jasp，并将其添加到表中。但是，当我重新加载页面时，以前的列表数据仍然保留，新数据被附加到其中。有人能提供解决这个问题的方法吗?万分感谢

控制器方法

 @RequestMapping(value = "/getUsersTable", method = RequestMethod.GET)
 public ModelAndView getUses() {
    List<User> list = new ArrayList<User>();
    list.addAll(service.getUsers());
    logger.debug("[User Controller] getUsersTable: Button clicked on user page");
    ModelAndView model = new ModelAndView("usersTable");

正在填充的表

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<div class="table-responsive" id="userTable">
    <table class="table table-striped table-hover wrapped-table">
    <thead>
        <tr>
            <th>User Name</th>
            <th>First Name</th>
            <th>Last Name</th>
            <th>Email Address</th>
            <th>Password</th>
            <th></th>
        </tr>
    </thead>
    <tbody>
        <c:forEach var="user" items="${userList}">
        <tr>
                <td><c:out value="${user.username}"/></td>
                <td><c:out value="${user.firstName}"/></td>
                <td><c:out value="${user.lastName}"/></td>
                <td><c:out value="${user.emailAddress}"/></td>
                <td><c:out value="${user.password}"/></td>
                <td class="align-center">
                <div class="btn-group editBtn">
                    <button type="button" title="Edit" data-id="${user.userId}" data-username="${user.username}" data-firstname="${user.firstName}" 
                    data-lastname="${user.lastName}"  data-emailaddress="${user.emailAddress}" data-password="${user.password}"class="btn btn-primary editUser">
                        <span class="glyphicon glyphicon-pencil"></span>
                    </button>
                </div>
                <div class="btn-group deleteBtn">
                    <button type="button" id="deleteUser=${user.username}" title="Delete" data-id="${user.userId}" class="btn btn-danger deleteUser">
                        <span class="glyphicon glyphicon-trash"></span>
                    </button>
                </div>
            </td>
        </tr>
        </c:forEach>
    </tbody>
</table>

javascript正在使用

$('#userTable').load(contextpath +'/getUsersTable')
用户jsp 

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
 <html lang="en">
 <head>
<spring:url value="/resources/css/bootstrap.min.css" var="bootMinCss"/>
<spring:url value="/resources/css/main.css" var="mainCss" />
<spring:url value="/resources/js/jquery-3.1.1.min.js" var="jqueryJs" />
<spring:url value="/resources/js/jquery.editable.min.js" var="jqueryEditJs" />
<spring:url value="/resources/js/main.js" var="mainJs" />
<spring:url value="/resources/js/bootstrap.min.js" var="bootstrapMinJs"/>

<link href="${bootMinCss}" rel="stylesheet"/>
<link href="${mainCss}" rel="stylesheet" />
<script src="${jqueryJs}"></script>
<script src="${jqueryEditJs}"></script>
<script src="${bootstrapMinJs}"></script>
<script src="${mainJs}"></script>
<script>
    var contextpath='${contextpath}';
</script>
</head>
<body>
<%@ include file="userModal.jsp"%>
<%@ include file="navbar.jsp"%>
<div class="btn-group editBtn">
    <button type="button" class="btn btn-primary showTable">
        <span class="glyphicon glyphicon-pencil"></span>
    </button>
</div>
<div id="userTable"></div>
</body>
</html>

每次加载之前，像这样清除你的html元素

$('#userTable').empty();
$('#userTable').load(contextpath +'/getUsersTable')
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