Question

我升级到Spring 3.1.1.RELEASE，现在我在以下方法上遇到异常：

@RequestMapping(method = RequestMethod.POST, params = "_finish")
public ModelAndView doPostFinish(@PathVariable("runEnvironmentName") RunEnvironment pEnvironment, @ModelAttribute("command") JobSpecNewCommand pCommand, BindingResult pErrors) 
{
...
}

引发以下异常：

java.lang.IllegalStateException: An Errors/BindingResult argument is expected 
to be immediately after the model attribute argument in the controller method 
signature: 

java.lang.IllegalStateException: An Errors/BindingResult argument is expected to be immediately after the model attribute argument in the controller method signature: public org.springframework.web.servlet.ModelAndView de.wwag.infra.oocsd.projectAdmin.fe.natures.hudson.jobspecs.RunEnvJobSpecNewController.doPostFinish(de.wwag.infra.oocsd.projectAdmin.common.domain.RunEnvironment,de.wwag.infra.oocsd.projectAdmin.fe.natures.hudson.jobspecs.JobSpecNewCommand,org.springframework.validation.BindingResult)
    at org.springframework.web.method.annotation.ErrorsMethodArgumentResolver.resolveArgument(ErrorsMethodArgumentResolver.java:62) ...

如您所见，方法签名符合预期。 BindingResult参数在model属性之后声明。

在同一个类中声明了以下方法：

@ModelAttribute("otherJobSpecs")
public List<JobReference> modelOtherJobSpecs(@PathVariable("runEnvironmentName") RunEnvironment pEnvironment, @ModelAttribute("command") JobSpecNewCommand pCommand) 
{
...
}

当我从课程中删除该方法时，一切都按预期工作。

有什么想法吗？

Answer 1

这是Spring的一个错误，我报告了它：SPR-9378。

Answer 2

阅读Spring错误SPR-9378，您必须从@ModelAttribute方法中删除模型变量：

@ModelAttribute
public void populateModel(Model model) { //this method haven't Libro Object
    model.addAttribute(Genero.values());
    model.addAttribute(EstadoLibro.values());
}

@RequestMapping(method=RequestMethod.POST)
public String grabarLibro(@Validated @ModelAttribute Libro libro, BindingResult result) {
   ...
}

它对我有用。

Spring MVC 3.1异常：错误/ BindingResult参数应该紧跟在model属性参数之后

2 个答案: