How to resolve SpringBoot 405 Method Not Allowed Error? - spring-boot

Question

I am expecting to receive the message "Works" on Postman (used for temporary testing until I implement the frontend and forms using HTML and CSS) when I type in the URL "http://localhost:8080/registration". This should be happening based on the code posted below. Instead, I receive the 405 Method Not Allowed Error.
WebSecurityConfig class
package com.example.finalVersionBookProject.security.config;
import com.example.finalVersionBookProject.appuser.AppUserService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
#Configuration
#EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
private final AppUserService appUserService;
private final BCryptPasswordEncoder bCryptPasswordEncoder;
public WebSecurityConfig(AppUserService appUserService, BCryptPasswordEncoder bCryptPasswordEncoder) {
this.appUserService = appUserService;
this.bCryptPasswordEncoder = bCryptPasswordEncoder;
}
Registration class
package com.example.finalVersionBookProject.registration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
#Controller
#RequestMapping(path = "/registration")
public class Registration {
private RegistrationService registrationService;
#PostMapping()
public String register(#RequestBody RegistrationRequest request) {
return registrationService.register(request);
}
}
Registration Service Class
package com.example.finalVersionBookProject.registration;
import org.springframework.stereotype.Service;
#Service
public class RegistrationService {
public String register(RegistrationRequest request) {
return "works";
}
}
I have tried replacing RestController with Controller, changing some of the annotations, both with no success. I tried using the IntelliJ debugger to resolve the issue, but it did not provide any new information that was helpful in solving the problem. I am expecting the message "Works" to be outputted to Postman, but I get the 405 Error.

Answer 1

When you type in URL http://localhost:8080/registration in Postman, what method did you use? I suspect you are using GET whilst your controller has a #PostMapping which support POST method.
You can try to use #GetMapping instead.