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Spring Security
Last Updated : 26 May, 2026
title: Spring Security
Spring Framework22 words3 headingsExamples included
title: Spring Security description: Spring Boot application secure karna
Authentication aur Authorization framework.
Dependency
xml exampleWoHoTech
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>Security Config (Spring Boot 3+)
java exampleWoHoTech
@Configuration
@EnableWebSecurity
public class SecurityConfig {
@Autowired
private UserDetailsService userDetailsService;
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.csrf(csrf -> csrf.disable())
.authorizeHttpRequests(auth -> auth
.requestMatchers("/api/auth/**").permitAll()
.requestMatchers("/api/admin/**").hasRole("ADMIN")
.requestMatchers(HttpMethod.GET, "/api/**").hasAnyRole("USER", "ADMIN")
.anyRequest().authenticated()
)
.sessionManagement(session ->
session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
.addFilterBefore(jwtAuthFilter, UsernamePasswordAuthenticationFilter.class);
return http.build();
}
@Bean
public PasswordEncoder passwordEncoder() {
return new BCryptPasswordEncoder();
}
@Bean
public AuthenticationManager authManager(AuthenticationConfiguration config) throws Exception {
return config.getAuthenticationManager();
}
}UserDetailsService
java exampleWoHoTech
@Service
public class CustomUserDetailsService implements UserDetailsService {
@Autowired UserRepository userRepo;
@Override
public UserDetails loadUserByUsername(String email) throws UsernameNotFoundException {
User user = userRepo.findByEmail(email)
.orElseThrow(() -> new UsernameNotFoundException("User not found: " + email));
return org.springframework.security.core.userdetails.User
.withUsername(user.getEmail())
.password(user.getPassword())
.roles(user.getRole())
.build();
}
}Exam Focus
Revise definitions, diagrams, examples, and short-answer points for Spring Security.
Interview Use
Prepare one clear explanation, one practical example, and one common mistake for this Java topic.
Search Terms
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