Spring-MVC annotated controller not recognized when controller extends interface

Question

I use spring 2.5 and use annotations to configure my controllers. My controller works fine if I do not implement any additional interfaces, but the spring container does not recognize the display of the controller / request when adding interface implementations.

I cannot understand why adding an interface implementation will ruin the controller configuration and query mappings. Any ideas?

So this works:

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 errors ) {
        String returnView = "redirect:index.html";

        if ( errors.hasErrors() ) {
            returnView = "register";
        } else {
            User newUser = new User();
            newUser.setUsername( command.getUsername() );
            newUser.setPassword( passwordEncoder.encodePassword( command
                    .getPassword(), null ) );
            newUser.setEmailAddress( command.getEmailAddress() );
            newUser.setFirstName( command.getFirstName() );
            newUser.setLastName( command.getLastName() );

            userService.registerNewUser( newUser );
        }
        return returnView;

    }

    public Validator getValidator() {
        return registrationValidator;
    }
}

but this is not so:

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 extends ValidatingController {

    @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 errors ) {
        String returnView = "redirect:index.html";

        if ( errors.hasErrors() ) {
            returnView = "register";
        } else {
            User newUser = new User();
            newUser.setUsername( command.getUsername() );
            newUser.setPassword( passwordEncoder.encodePassword( command
                    .getPassword(), null ) );
            newUser.setEmailAddress( command.getEmailAddress() );
            newUser.setFirstName( command.getFirstName() );
            newUser.setLastName( command.getLastName() );

            userService.registerNewUser( newUser );
        }
        return returnView;

    }

    public Validator getValidator() {
        return registrationValidator;
    }
}

Answer 1

layne, , , , , , , ValidatingController.

, Spring, Spring @Controller, . , , Spring, .

Answer 2

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SimpleFormController , ? , , .

Answer 3

By default, JDK proxies are created using the interface, and if the controller implements the interface, the RequestMapping annotation is ignored because targetClass is not used

Add this to the servlet context configuration:

<aop:aspectj-autoproxy proxy-target-class="true"/>