提交的数据未存储在数据库中

Question

在我当前的 spring-boot 项目中，我有一个用 Thymeleaf 构建的页面，其中我有一个这样的表单：

<form class="form" role="form" method="post" th:action="@{/__${command.getClass().getSimpleName()}__/cadastra}">
   ...
</form>

渲染到这个：

<form class="form" role="form" method="post" action="/Usuario/cadastra">
    ...
</form>

当我尝试提交表单时出现问题：触发了以下错误：

error: "Internal Server Error"
exception: "org.thymeleaf.exceptions.TemplateInputException"
message: "Error resolving template "Usuario/cadastra", template might not exist or might not be accessible by any of the configured Template Resolvers"
path: "/Usuario/cadastra"
status: 500
timestamp: 1417225370311

在控制台中显示：

2014-11-28 22:42:50.303 ERROR 32286 --- [nio-8080-exec-4] org.thymeleaf.TemplateEngine             : [THYMELEAF][http-nio-8080-exec-4] Exception processing template "Usuario/cadastra": Error resolving template "Usuario/cadastra", template might not exist or might not be accessible by any of the configured Template Resolvers
2014-11-28 22:42:50.305 ERROR 32286 --- [nio-8080-exec-4] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateInputException: Error resolving template "Usuario/cadastra", template might not exist or might not be accessible by any of the configured Template Resolvers] with root cause

org.thymeleaf.exceptions.TemplateInputException: Error resolving template "Usuario/cadastra", template might not exist or might not be accessible by any of the configured Template Resolvers
        at org.thymeleaf.TemplateRepository.getTemplate(TemplateRepository.java:245)
        at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1104)
        at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1060)
        at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1011)
        at org.thymeleaf.spring4.view.ThymeleafView.renderFragment(ThymeleafView.java:335)
        at org.thymeleaf.spring4.view.ThymeleafView.render(ThymeleafView.java:190)
        at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1221)
        at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1005)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:952)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1736)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1695)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)

任何人都可以看到这里有什么问题？

PS.：提交数据的处理程序是这个控制器方法：

  @RequestMapping(value = "cadastra", method=RequestMethod.POST)
  public void cadastra(@ModelAttribute("object") E object, BindingResult result) {
    serv.cadastra(object);
  }

更新

我解决了上面添加注释@ResponseBody到控制器中的方法的错误，但现在我有另一个问题：尽管没有显示更多错误，但提交的数据没有保存在数据库中（如果我尝试也会发生同样的情况更新或删除对象）。

控制器中处理此操作的方法是：

  @RequestMapping(value = "cadastra", method=RequestMethod.POST)
  @ResponseBody
  public void cadastra(@ModelAttribute("object") E object, BindingResult result) {
    serv.cadastra(object);
  }

  @RequestMapping(value = "altera", method=RequestMethod.POST)
  @ResponseBody
  public void altera(@ModelAttribute("object") E object, BindingResult result) {
    serv.altera(object);
  }

  @RequestMapping(value = "remove", method=RequestMethod.POST)
  @ResponseBody
  public void remove(@ModelAttribute("object") E object, BindingResult result) {
    serv.remove(object);
  }

在我的服务类中：

  @PreAuthorize("hasPermission(#user, 'cadastra_'+#this.this.name)")
  @Transactional
  public void cadastra(E object) {
    dao.insert(object);
  }

  @PreAuthorize("hasPermission(#user, 'altera_'+#this.this.name)")
  @Transactional
  public void altera(E object) {
    dao.update(object);
  }

  @PreAuthorize("hasPermission(#user, 'remove_'+#this.this.name)")
  @Transactional
  public void remove(E object) {
    dao.delete(object);
  }

在我的 Dao 课上：

@Transactional
public void insert(E object) {
    getEntityManager().persist(object);
}

@Transactional
public void update(E object) {
    getEntityManager().merge(object);
}

@Transactional
public void delete(E object) {
    getEntityManager().remove(object);
}

现在怎么了？

Answer 1

问题是模板丢失。如果您的模板与默认位置不同，您需要从@RequestMapping 返回一个字符串。

Answer 2

我设法在我的 dao 类的方法中使用这个结构解决了这个问题：

public void insert(E object) {
    EntityManager entityManager = getEntityManager();
    entityManager.getTransaction().begin();
        entityManager.persist(object);
    entityManager.getTransaction().commit();
}