- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
我已经包含了所有必要的内容,但没有包含为什么会出现错误,请帮助我
我的模型是:
Entity
@Table(name = "user")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String username;
private String mobileno;
private String password;
private String passwordConfirm;
并且包含所有 getter setter
我的 Controller :
@Controller
public class AdminController {
@Autowired
private UserValidator userValidator;
@Autowired
private UserService userService;
@Autowired
private SecurityService securityService;
@RequestMapping(value = "/list-user", method = RequestMethod.GET)
public ModelAndView DisplayUser(ModelAndView mv) {
mv.addObject("userlist",userService.getallUsers());
mv.setViewName("list-user");
return mv;
}
}
我的jsp页面
<div class="row">
<!-- main contain here -->
<h1>List of Users</h1>
<table>
<thead>
<tr>
<th>Name</th>
<th>Phone no</th>
<th>Password</th>
</tr>
</thead>
<c:forEach items="${userlist} " var="user">
<tbody>
<td><c:out value=${user.username }></c:out></td>
<td>${user.mobileno }</td>
<td>${user.password }</td>
</tbody>
</c:forEach>
</table>
<!-- Content Row -->
<!-- /.container-fluid -->
</div>
我得到的错误是
ERROR 13620 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [An exception occurred processing JSP page /list-user.jsp at line 58
null
Stacktrace:] 以及根本原因
javax.el.PropertyNotFoundException: Property 'username' not found on type java.lang.String
at javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:268) ~[tomcat-embed-el-8.0.33.jar:8.0.33]
at javax.el.BeanELResolver$BeanProperties.access$300(BeanELResolver.java:221) ~[tomcat-embed-el-8.0.33.jar:8.0.33]
at javax.el.BeanELResolver.property(BeanELResolver.java:355) ~[tomcat-embed-el-8.0.33.jar:8.0.33]
at javax.el.BeanELResolver.getValue(BeanELResolver.java:95) ~[tomcat-embed-el-8.0.33.jar:8.0.33]
at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110) ~[tomcat-embed-jasper-8.0.33.jar:8.0.33]
at org.apache.el.parser.AstValue.getValue(AstValue.java:169) ~[tomcat-embed-el-8.0.33.jar:8.0.33]
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184) ~[tomcat-embed-el-8.0.33.jar:8.0.33]
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:943) ~[tomcat-embed-jasper-8.0.33.jar:8.0.33]
at org.apache.jsp.list_002duser_jsp._jspx_meth_c_005fforEach_005f0(list_002duser_jsp.java:478) ~[na:na]
at org.apache.jsp.list_002duser_jsp._jspService(list_002duser_jsp.java:355) ~[na:na]
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) ~[tomcat-embed-jasper-8.0.33.jar:8.0.33]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438) ~[tomcat-embed-jasper-8.0.33.jar:8.0.33]
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396) ~[tomcat-embed-jasper-8.0.33.jar:8.0.33]
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340) ~[tomcat-embed-jasper-8.0.33.jar:8.0.33]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.0.33.jar:8.0.33]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:69) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:68) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:184) ~[spring-security-web-4.0.4.RELEASE.jar:4.0.4.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.33.jar:8.0.33]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
最佳答案
请检查以下方法是否返回任何值。
userService.getallUsers()
然后,尝试使用 addAttribute()
而不是 addObject()
mv.addAttribute("userlist",userService.getallUsers());
如果仍然有任何问题,请尝试使用以下代码替换您的 Controller 方法。
public String DisplayUser(ModelMap map) {
map.addObject("userlist",userService.getallUsers());
return "list-user";
}
如果仍然存在,您有任何问题请参阅此 link
关于javax.el.PropertyNotFoundException : Property 'username' not found on type java. lang.String,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58492305/
我升级了 Java EE Web 应用程序以使用较新的 PrimeFaces 版本,突然在 PrimeFaces commandlink 的操作属性中调用重载 bean 方法不再起作用。我尝试使用 J
考虑以下代码片段。 var SomeView = Backbone.View.extend({ collection: new SomeCollection(), render: fu
很难说出这里问的是什么。这个问题是含糊的、模糊的、不完整的、过于宽泛的或修辞性的,无法以目前的形式得到合理的回答。如需帮助澄清此问题以便重新打开它,visit the help center 。 已关
我的 JSP 在 Tomcat 7 中运行良好,但在 Tomcat 6 中不起作用,我认为这是因为您不能从 EL 2.1 调用方法(getter/setter 除外)。 我需要调用的方法不能命名为ge
这个问题在这里已经有了答案: How to nest an EL expression in another EL expression (2 个答案) 关闭 5 年前。 我有 Java 枚举类型,
为什么会这样? ....Some Code 在我的 profielForm 中,我只有一个 getCityOptions() 方法,没有 cityO
我正在关注 backbone.js tutorial并遇到了 2 个函数 initialize() 和 render()。 initialize() 在附加一些 html 时使用了 $(self.el
对于给定的示例,this.el 和 this.$el 之间有什么区别? 我知道 this.$el 指向 this.el 的 jQuery 对象,在本例中是 'li'。 当我呈现 View 时,我可以在
我一直在我的主干应用程序中使用 this.$el,如下所示: render: function() { this.$el.html(this.template); }, 然后我在网上看到代码使
我想使用 EL 在 jsp 中调用一个传递给它的参数的 bean 函数。问题是它不允许这样的事情:“${teacherBean.certificationFor(${particularField})
有没有办法可以在 EL 中获取 ServletContext 中设置的属性,使其最终成为 JavaScript 变量? 我将其设置为 context.setAttribute("testing.por
我正在编写 JSP/JSTL,并且我正在尝试遍历数据库中的几个项目。 我目前在数据库中有三列,${image1} , ${image2}和 ${image3} .我正在尝试使用以下代码为他们打印信息:
this.$el.html 和 this.$el.append 在渲染模板时有区别吗?我对 js、backbone 等完全陌生。在我正在从事的当前项目中,我看到类似 this.$el.append(P
我刚刚学习了一些主干教程,我有一个一般的 jQuery 问题,我实际上已经想知道了一段时间。 有时我会在 jQuery 选择器中看到带有第二个参数的调用,例如 $('ul', this.el)。 选择
有没有办法在 SpEL 中调用静态接口(interface)方法?例如: T(java.util.stream.IntStream).of(new Integer[]{1,2,3}).sum() 当我
这个问题已经有答案了: If a DOM Element is removed, are its listeners also removed from memory? (6 个回答) 已关闭 5 年
JBoss EL resolver online documentation中有这句话: It's important to fully understand how this extension t
使用 JSF 2.0 和 EL,我试图在 POJO 上调用一个方法,它是一个 viewscoped bean 的一个属性。该代码实际上与 @BalusC 非常相似的教程here .当我调用一个不带参数
所以我整个下午都在 this problem 上卡住了我最终解决了。原来我分配的是 el 而不是 $el。 两者有什么区别,我应该在什么时候使用它们? 最佳答案 直接来自 the documentat
我正在努力学习 Backbone 。我知道 el 是正在执行的元素。如果未指定,则为空 div。我正在我的 View 中创建一个模板并返回 View 对象。然后我正在渲染 View ,但我不明白为什么
我是一名优秀的程序员,十分优秀!