Spring Boot In Action [cracked] May 2026

@Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(); } } @Service public class JwtService { public String generateToken(User user) { return Jwts.builder() .setSubject(user.getEmail()) .claim("roles", user.getRoles()) .setIssuedAt(new Date()) .setExpiration(new Date(System.currentTimeMillis() + 86400000)) .signWith(getSigningKey(), SignatureAlgorithm.HS256) .compact(); } } 6. Actuator & Monitoring Enable Actuator management: endpoints: web: exposure: include: health,info,metrics,prometheus endpoint: health: show-details: always metrics: export: prometheus: enabled: true Custom Health Indicator @Component public class CustomHealthIndicator implements HealthIndicator { @Override public Health health() { boolean healthy = checkExternalService(); return healthy ? Health.up().build() : Health.down().withDetail("reason", "Service unavailable").build(); } } Custom Metrics @Service public class MonitoredService { private final Counter requestCounter; public MonitoredService(MeterRegistry meterRegistry) { this.requestCounter = Counter.builder("api.requests.total") .description("Total API requests") .register(meterRegistry); }

@Component public class OrderPublisher { @Autowired private RabbitTemplate rabbitTemplate; spring boot in action

myapp: custom-property: value @ConfigurationProperties(prefix = "myapp") @Component public class AppProperties { private String customProperty; private EmailConfig email = new EmailConfig(); // getters/setters @Data public static class EmailConfig { private String host; private int port; } } private EmailConfig email = new EmailConfig()

This comprehensive guide covers the essential features of Spring Boot in action for building production-ready applications. private int port