在Spring项目中使用@ModelAttribute时出错SpringInputGeneralFieldAttrProcessor-Java 学习之路

我正在尝试使用表单更新用户名 . 问题是，当我使用@ModelAttribute时，我得到以下错误：

执行处理器'org.thymeleaf.spring4.processor.attr.SpringInputGeneralFieldAttrProcessor'时出错（帐号：79）

Full error information from IDE:

2017-12-30 09：03：16.082 ERROR 6536 --- [nio-8080-exec-7] oaccC [ . [ . [/] . [dispatcherServlet]：Servlet中的Servlet.service（）[dispatcherServlet] with path []抛出异常[请求处理失败;嵌套异常是org.thymeleaf.exceptions.TemplateProcessingException：执行处理器'org.thymeleaf.spring4.processor.attr.SpringInputGeneralFieldAttrProcessor'（帐号：79）]时出错，根本原因java.lang.IllegalStateException：既不是BindingResult也不是普通的目标对象for bean name'user'可在org.springframework.web.servlet.support.BindStatus中作为请求属性使用 . （BindStatus.java:144）〜[spring-webmvc-4.3.13.RELEASE.jar：4.3.13.RELEASE]在org.thymeleaf.spring4.util.FieldUtils.getBindStatusFromParsedExpression（FieldUtils.java:401）〜[thymeleaf-spring4-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.spring4.util.FieldUtils . 在org.thymeleaf.spring4.util.FieldUtils.getBindStatus（FieldUtils.java:294）〜[thymeleaf]的getBindStatus（FieldUtils.java:328）〜[thymeleaf-spring4-2.1.6.RELEASE.jar：2.1.6.RELEASE] -spring4-2.1.6.RELEASE.jar：2.1.6.RELEASE] at org.thymeleaf.spring4.processor.attr.AbstractSpringFieldAttrProcessor.processAttribute（AbstractSpringFieldAttrProces sor.java:98）〜[thymeleaf-spring4-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess（AbstractAttrProcessor.java:87）〜[thymeleaf-2.1 .6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.processor.AbstractProcessor.process（AbstractProcessor.java:212）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] at org .thymeleaf.dom.Node.applyNextProcessor（Node.java:1017）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:972）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6 .RELEASE] org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.Node.processNode（Node .java：990）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1.6.RELEASE . jar：2.1.6.RELEASE] at org orthy.lemeleaf.dom.Node.processNode上的.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE]（Node.java:990）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6 .RELEASE] org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.Node.processNode（Node .java：990）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1.6.RELEASE . jar：2.1.6.RELEASE]在org.thymeleaf.dom的org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] . Node.processNode（Node.java:990)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] atg.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1 .6.RELEASE.jar：2.1 . 6.RELEASE] org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] at org.thymeleaf.dom.Node.processNode（ Node.java:990)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] atg.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1.6.RELEASE .jar：2.1.6.RELEASE]在org.thymeleaf.dom的org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] .Node.processNode（Node.java:990)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] atg.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf- 2.1.6.RELEASE.jar：2.1.6.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695 ）〜[thymeleaf-2.1.6 .RELEASE.jar：2.1.6.RELEASE]在org.thymeleaf的org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] .dom.Node.processNode（Node.java:990)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] atg.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [ thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] atorg.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.Node.processNode（Node.java:990 ）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695)~ [thymeleaf-2.1.6.RELEASE.jar：2.1 . 6.RELEASE] org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] at org.thymeleaf.dom.Node.processNode（ Node.java:990)~ [thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.dom.Document.process（Document.java:93）〜[thymeleaf-2.1.6.RELEASE .jar：2.1.6.RELEASE] org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1155）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.TemplateEngine.process （TemplateEngine.java:1060）〜[thymeleaf-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1011）〜[thymeleaf-2.1.6.RELEASE . jar：2.1.6.RELEASE]在org.thy meleaf.spring4.view.ThymeleafView.renderFragment（ThymeleafView.java:335)~ [thymeleaf-spring4-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.thymeleaf.spring4.view.ThymeleafView.render（ThymeleafView） .java：190）〜[thymeleaf-spring4-2.1.6.RELEASE.jar：2.1.6.RELEASE] org.springframework.web.servlet.DispatcherServlet.render（DispatcherServlet.java:1286）〜[spring-webmvc- 4.3.13.RELEASE.jar：4.3.13.RELEASE] at org.springframework.web.servlet.DispatcherServlet.processDispatchResult（DispatcherServlet.java:1041）〜[spring-webmvc-4.3.13.RELEASE.jar：4.3.13 .RELEASE] org.springframework.web.serv宿舍上的org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:984）〜[spring-webmvc-4.3.13.RELEASE.jar：4.3.13.RELEASE] org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:970）中的.DispatcherServlet.doService（DispatcherServlet.java:901)~ [spring-webmvc-4.3.13.RELEASE.jar：4.3.13.RELEASE] org.springframewor上的〜[spring-webmvc-4.3.13.RELEASE.jar：4.3.13.RELEASE] k.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:861）〜[spring-webmvc-4.3.13.RELEASE.jar：4.3.13.RELEASE]，位于javax.servlet.http.HttpServlet.service（HttpServlet.java）：635）〜[tomcat-embed-core-8.5.23.jar：8.5.23]在org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:846）〜[spring-webmvc-4.3.13 . RELEASE.jar：4.3.13.RELEASE]在org.apache的javax.servlet.http.HttpServlet.service（HttpServlet.java:742）〜[tomcat-embed-core-8.5.23.jar：8.5.23] . catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:231）〜[tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166 ）〜[tomcat-embed-core-8.5.23.jar：8.5.23]在org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）〜[tomcat-embed-websocket-8.5 . 23.jar：8.5.23]在org.apac的org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜[tomcat-embed-core-8.5.23.jar：8.5.23] he.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166)~ [tomcat-embed-core-8.5.23.jar：8.5.23] at org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy） .java：317）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke（FilterSecurityInterceptor.java:127）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter（FilterSecurityInterceptor.java:91）〜[spring-security -web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[spring-security-web-4.2.3 . RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.access.ExceptionTranslationFilter.doFilter（ExceptionTranslationFilter.java:114）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3 .RELEASE]在org.springframework.secu org.springframework.security.web.session.SessionManagementFilter上的rity.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331)~ [spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] .doFilter（SessionManagementFilter.java:137）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java： 331）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter（AnonymousAuthenticationFilter.java:111)~ [spring-security -web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[spring-security-web-4.2.3 . RELEASE.jar：4.2.3.RELEASE] at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter（SecurityContextHolderAwareRequestFilter.java:170）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[spring-security-web -4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter（RequestCacheAwareFilter.java:63）〜[spring-security-web-4.2.3.RELEASE . jar：4.2.3.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE在org.springframework.security的org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter（AbstractAuthenticationProcessingFilter.java:200）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.security.web.authentication.logout中的.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] . LogoutFilter.doFilter（登录outFilter.java:116）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜 [spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal（HeaderWriterFilter.java:64）〜[spring-security-web- 4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.13.RELEASE.jar：4.3.13 .RELEASE] org.springframework上的org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331)~ [spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.security.web.FilterChainProxy $ .security.web.context.SecurityContextPersistenceFilter.doFilter（SecurityContextPersistenceFilter.java:105）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[ spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal（WebAsyncManagerIntegrationFilter.java:56）〜[spring-security -web-4.2.3.RELEASE.jar：4.2.3.RELEASE]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.13.RELEASE.jar： 4.3.13.RELEASE]在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] at at org.springframework.security.web.FilterChainProxy.doFilterInternal（FilterChainProxy.java:214）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.security.web.FilterChainProxy .doFilter（FilterChainProxy.java:177）〜[spring-security-web-4.2.3.RELEASE.jar：4.2.3.RELEASE] org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:347）〜[ spring 网络4.3.13.RELEASE.jar：4.3.1 3.RELEASE]在org.apache.catalina的org.springframework.web.filter.DelegatingFilterProxy.doFilter（DelegatingFilterProxy.java:263）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] . core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193)~ [tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166)~ [tomcat-embed-core-8.5.23.jar：8.5.23]在org.springframework.web.filter.RequestContextFilter.doFilterInternal（RequestContextFilter.java:99）〜[spring-web-4.3.13.RELEASE.jar： 4.3.13.RELEASE]在org.apache的org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] . catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜[tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166在组织中~~ [tomcat-embed-core-8.5.23.jar：8.5.23] . orframe.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter）中的springframework.web.filter.HttpPutFormContentFilter.doFilterInternal（HttpPutFormContentFilter.java:108）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] .java：107）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193)~ [tomcat-embed- core-8.5.23.jar：8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166)~ [tomcat-embed-core-8.5.23.jar：8.5.23] at at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal（HiddenHttpMethodFilter.java:81）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] org.springframework.web.filter.OncePerRequestFilter.doFilter （OncePerRequestFilter.java:107）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜[tomcat-embed-core-8.5.23.jar：8.5.23]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）〜[tomcat-embed-core-8.5.23.jar ：8.5.23]在org.springframework.web的org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:197）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE] .filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.13.RELEASE.jar：4.3.13.RELEASE]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java： 193）〜[tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166)~ [tomcat-embed-core-8.5.23 .jar：8.5.23]在org.apache.catalina的org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:199）〜[tomcat-embed-core-8.5.23.jar：8.5.23]组织中的.core.StandardContextValve.invoke（StandardContextValve.java:96）[tomcat-embed-core-8.5.23.jar：8.5.23] . apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:478）[tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java： 140）[tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:81）[tomcat-embed-core-8.5.23.jar ：8.5.23] org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:87）[tomcat-embed-core-8.5.23.jar：8.5.23] org.apache.catalina.connector . CoyoteAdapter.service（CoyoteAdapter.java:342）[tomcat-embed-core-8.5.23.jar：8.5.23]在org.apache.coyote.http11.Http11Processor.service（Http11Processor.java:803）[tomcat-embed -core-8.5.23.jar：8.5.23] org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:66）[tomcat-embed-core-8.5.23.jar：8.5.23] at org . apache.coyote.AbstractProtocol $ ConnectionHandler.process（AbstractProtocol.java:868）[tomcat-embed-core-8.5.23.jar：8.5.23] at org.apache.tomcat.util.net.NioEnd在org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49）中指向$ SocketProcessor.doRun（NioEndpoint.java:1459）[tomcat-embed-core-8.5.23.jar：8.5.23] [tomcat-embed-core-8.5.23.jar：8.5.23] at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1149）[na：1.8.0_152] at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:624）[na：1.8.0_152] at org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）[tomcat-embed-core-8.5.23 .jar：8.5.23] at java.lang.Thread.run（Thread.java:748)[na:1.8.0_152]

Account Controller class:

@Controller
public class AccountController {

    @Autowired
    private UserService userService;

    @GetMapping("/account")
    public ModelAndView adminPage(){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("account");
        //modelAndView.addObject("users", userService.getAllUsers());
        return modelAndView;
    }


    @PutMapping("/renameUsername")
    public ModelAndView renameUserName(@ModelAttribute("user") User newUserName) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        String currentUser = auth.getName();
        userService.changeUsername(currentUser, newUserName);
        return new ModelAndView("account");
    }

Model User class:

@Entity
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
@ToString
public class User {
    @Id
    private String logonName;
    private String firstName;
    private String lastName;
    @JsonIgnore
    private String password;
    private String recoveryQuestion;
    @JsonIgnore
    private String recoveryAnswer;

}

User service method responsible for username change:

public  void changeUsername(String oldUserName, User newUserName) {
    User user = userRepository.findOne(oldUserName);
    user.setLogonName(newUserName.getLogonName());
    userRepository.save(user);
}

account.html code snippet:

<div class="jumbotron">
  <form th:action="@{/renameUsername}" th:method="put" th:object="${user}">
    <dl class="row">
      <dt class="col-sm-5">
<p>Change username:</p>
<p class="description">Enter your username, which you will use to login</p>
</dt>
      <dd class="col-sm-7">
        <p>
          <label for="inputUser" class="sr-only">username</label>
          <input type="text" id="inputUser" class="form-control" name="logonName" th:field="*{logonName}" placeholder="Username" />
        </p>
        <p>
          <button type="submit" class="btn btn-sm btn-warning">Update username</button>a
        </p>
      </dd>
    </dl>
  </form>
</div>

我试图使用文章来解决问题，在这些文章中，报告类似问题但解决方案不起作用的人 . 大多数情况下，变量/型号名称中存在拼写错误 . 我检查了这个，但我仍然遇到这个问题 .

有什么建议我收到此错误？

1 回答

0

在你的代码 /modelAndView.addObject("users", userService.getAllUsers()); . 但在你看来 <form th:action="@{/renameUsername}" th:method="put" th:object="${user}"> ：

将 users 更改为 user .

回复于 2024-04-24T15:03:23+08:00

在Spring项目中使用@ModelAttribute时出错SpringInputGeneralFieldAttrProcessor

1 回答

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