Spring Security with Spring boot

1. Go to maven Repository and search “Spring Boot Starter Security” Choose any of the latest

version adds a dependency to pom.xml

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-security</artifactId>

<version>3.1.2</version>

</dependency>

2. Run the Springboot application Spring Security will generate a new password for you

check-in console.

Using generated security password: f6f3790e-e62a-4147-bc08-d1d3bsa92fdd7

3. Try to access Rest API in a web browser it will redirect to a login page.

http://localhost:8080/login

4. you can log in with username=user and password = f6f3790e-e62a-4147-bc08-

d1d3bsa92fdd7 the generated password.

5. After that you can use your api6.Change username and password using the application. properties file

spring.security.user.name=neeraj

spring.security.user.password=Neeraj

now you can log in with this login and password while accessing the API.

7. To log out from the spring security use the logout path.

http://localhost:8080/logout

8. Create In memory user

Create a class and create and user annotate with @Configration user

@Configuration

public class Security {

@Bean

UserDetailsService userDetailsService() {

UserDetails user =

User.builder ().username("Duresh").password(passwordEncoder().encode("abc")).roles("ADMIN").build();

return new InMemoryUserDetailsManager(user);

}

@Bean

PasswordEncoder passwordEncoder() {

return new BCryptPasswordEncoder();

}

}

9. Get Current User by Principal class

@GetMapping("/getCurrentUser")

public String getLoggedInUser(Principal principal) {

return principal.getName();

}