SimpleFormController报错

严重: Servlet.service() for servlet springServlet threw exception

java.lang.IllegalStateException: Cannot create command without commandClass being set - either set commandClass or (in a form controller) override formBackingObject

at org.springframework.web.servlet.mvc.BaseCommandController.createCommand(BaseCommandController.java:358)

at org.springframework.web.servlet.mvc.AbstractFormController.formBackingObject(AbstractFormController.java:477)

at org.springframework.web.servlet.mvc.AbstractFormController.getErrorsForNewForm(AbstractFormController.java:358)

at org.springframework.web.servlet.mvc.AbstractFormController.showNewForm(AbstractFormController.java:338)

at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:278)

at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)

at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

原因： 是controller配置文件中忘了加<property name="commandName" value="passengerCardForm"></property>

<property name="commandClass" value="xxxxxx.domain.User"></property>