使用ControllerClassNameHandlerMapping找到不明确的映射

如何在方法之上将请求映射到没有显式注释的方法？例如,以下请求:

http://somedomain:8080/SampleSpring/access/loginFailed

应该映射到

"AccessController"的"loginFailed"方法,不需要对方法的显式注释,如:

@RequestMapping("/access/loginFailed")

这是我的弹簧配置:

这是我的控制器:

@Controller
public class AccessController{

    @RequestMapping(method = RequestMethod.GET)
    public void login(ModelMap m) {}

    @RequestMapping(method = RequestMethod.GET)
    public String loginFailed(ModelMap m) {
        m.addAttribute("error", "true");
        return "access/login";
    }

    @RequestMapping(method = RequestMethod.GET)
    public String logout(ModelMap m) {
        m.addAttribute("logoutStatus","true");
        return "access/login";
    }
}

我收到以下错误(似乎只有登录方法被正确映射):

org.apache.catalina.LifecycleException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'accessController' bean method 
public java.lang.String com.robikcodes.samplespring.controller.AccessController.logout(org.springframework.ui.ModelMap)
to {[],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'accessController' bean method
public void com.robikcodes.samplespring.controller.AccessController.login(org.springframework.ui.ModelMap) mapped.

nobeh.. 5

您使用ControllerClassNameHandlerMapping的假设不正确; 来自Java doc:

HandlerMapping的实现遵循一个简单的约定,用于从已注册的Controller bean的类名以及@Controller注释bean生成URL路径映射.

该文档并未说明它也遵循方法名称.比较控制器的"处理程序映射"的主要参考是@RequestMapping放在方法上的注释.因此,使用您的控制器Spring将它们读取为:

{methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}

对于所有已定义的方法AccessController,具有以下内容@RequestMapping:

@RequestMapping(method = RequestMethod.GET)

这就是你看到模棱两可的例外的原因.

据我了解,最干净的解决方案是使用value属性@RequestMapping来定义不同的请求URI.实际上并不建议尝试将请求URI映射到方法名称的解决方案.