Use authenticationManager Bean in 5.7.1 ver

README.md

@@ -2,5 +2,26 @@
 
 Spring Boot를 이용한 간단한 JWT 예시 레포지토리 
 
-# Getting Started
 
+# How to use authenticationManager Bean in 5.7.1
+
+> 참고 : https://spring.io/blog/2022/02/21/spring-security-without-the-websecurityconfigureradapter
+
+### Question
+Is there any example how can I expose the AuthenticationManager bean? Previously I could do this by extending WebSecurityConfigurerAdapter and then creating the following method in my security config:
+```
+@Override
+@Bean
+public AuthenticationManager authenticationManagerBean() throws Exception {
+    return super.authenticationManagerBean();
+}
+```
+
+### Answer
+The following solution solved the issue for me.
+```
+@Bean
+public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
+    return authenticationConfiguration.getAuthenticationManager();
+}
+```

src/main/java/demo/api/config/JwtSecurityConfig.java

@@ -17,10 +17,6 @@ import org.springframework.security.web.authentication.UsernamePasswordAuthentic
 public class JwtSecurityConfig extends SecurityConfigurerAdapter<DefaultSecurityFilterChain, HttpSecurity> {
   private final JwtTokenProvider jwtTokenProvider;
 
-//  public JwtSecurityConfig(JwtTokenProvider jwtTokenProvider) {
-//    this.jwtTokenProvider = jwtTokenProvider;
-//  }
-
   @Override
   public void configure(HttpSecurity http) throws Exception {
     JwtTokenFilter customFilter = new JwtTokenFilter(jwtTokenProvider);

src/main/java/demo/api/config/SecurityConfig.java

@@ -6,9 +6,13 @@ import demo.api.jwt.JwtTokenFilter;
 import demo.api.jwt.JwtTokenProvider;
 import lombok.RequiredArgsConstructor;
 import org.springframework.context.annotation.Bean;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.security.web.SecurityFilterChain;
@@ -26,6 +30,13 @@ public class SecurityConfig {
   public BCryptPasswordEncoder passwordEncoder() {
     return new BCryptPasswordEncoder();
   }
+
+  @Bean
+  public AuthenticationManager authenticationManager(
+      AuthenticationConfiguration authenticationConfiguration) throws Exception {
+    return authenticationConfiguration.getAuthenticationManager();
+  }
+
   @Bean
   public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
     // 

src/main/java/demo/api/config/UserDetailsServiceImpl.java

@@ -3,16 +3,12 @@ package demo.api.config;
 import demo.api.user.domain.User;
 import demo.api.user.exception.UserNotFoundException;
 import demo.api.user.repository.UserRepository;
-import java.util.ArrayList;
-import java.util.Collection;
 import java.util.HashSet;
 import java.util.Set;
-import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
-import org.springframework.stereotype.Component;
 import org.springframework.stereotype.Service;
 
 @Service