尝试在JSP中提交表单时出现IllegalArgumentException

Question

在JSP中尝试提交表单时出现IllegalArgumentException。我试图将这个请求路由到一个spring mvc控制器。虽然信息很清楚，但我不明白需要改变的是什么。 这里是trace-

Apr 25, 2017 9:29:29 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [EWeb] in context with path [/EWeb] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: argument type mismatch HandlerMethod details: Controller [com.test.pm.crequest.web.NewRequestController] Method [protected void com.test.pm.crequest.web.NewRequestController.onSubmitAction(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse,java.lang.Object,org.springframework.validation.BindException) throws java.lang.Exception] Resolved arguments: [0] [type=org.apache.catalina.connector.RequestFacade] [[email protected]] [1] [type=org.apache.catalina.connector.ResponseFacade] [[email protected]] [2] [type=java.lang.Object] [[email protected]] [3] [type=org.springframework.validation.BeanPropertyBindingResult] [value=org.springframework.validation.BeanPropertyBindingResult: 0 errors] ] with root cause

Answer 1

我改变了参数的onSubmitMethod到异常：

protected String onSubmitAction(HttpServletRequest request, 
     HttpServletResponse response, @ModelAttribute CRequestForm command, BindingResult errors) 
     throws Exception { 

和问题就解决了。