小编lay*_*yne的帖子

我正在使用spring 2.5和注释来配置我的spring-mvc web上下文.不幸的是,我无法让以下工作.我不确定这是一个错误(似乎是这样),或者是否存在对注释和接口实现子类化如何工作的基本误解.

例如,

@Controller
@RequestMapping("url-mapping-here")
public class Foo {
  @RequestMapping(method=RequestMethod.GET)
  public void showForm() {
    ...
  }
  @RequestMapping(method=RequestMethod.POST)
  public String processForm() {
  ...
  }
}

工作良好.当上下文启动时,会发现此处理程序处理的URL,并且一切都很好.

然而,这不是:

@Controller
@RequestMapping("url-mapping-here")
public class Foo implements Bar {
  @RequestMapping(method=RequestMethod.GET)
  public void showForm() {
    ...
  }
  @RequestMapping(method=RequestMethod.POST)
  public String processForm() {
  ...
  }
}

当我尝试拉出网址时,我得到以下令人讨厌的堆栈跟踪:

javax.servlet.ServletException: No adapter for handler [com.shaneleopard.web.controller.RegistrationController@e973e3]: Does your handler implement a supported interface like Controller?
    org.springframework.web.servlet.DispatcherServlet.getHandlerAdapter(DispatcherServlet.java:1091)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:874)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:627)

但是,如果我将Bar更改为抽象超类并让Foo扩展它,那么它再次起作用.

@Controller
@RequestMapping("url-mapping-here")
public class Foo extends Bar …

我正在使用spring 2.5,并使用注释来配置我的控制器.如果我没有实现任何其他接口,我的控制器工作正常,但是当我添加接口实现时,spring容器无法识别控制器/请求映射.

我无法弄清楚为什么添加接口实现会混淆控制器的配置和请求映射.有任何想法吗？

所以,这有效:

package com.shaneleopard.web.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.providers.encoding.Md5PasswordEncoder;
import org.springframework.stereotype.Controller;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.shaneleopard.model.User;
import com.shaneleopard.service.UserService;
import com.shaneleopard.validator.RegistrationValidator;
import com.shaneleopard.web.command.RegisterCommand;

@Controller
public class RegistrationController {

    @Autowired
    private UserService userService;

    @Autowired
    private Md5PasswordEncoder passwordEncoder;

    @Autowired
    private RegistrationValidator registrationValidator;

    @RequestMapping( method = RequestMethod.GET, value = "/register.html" )
    public void registerForm(@ModelAttribute RegisterCommand registerCommand) {
        // no op
    }

    @RequestMapping( method = RequestMethod.POST, value = "/register.html" )
    public String registerNewUser( @ModelAttribute RegisterCommand command,
            Errors …