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Asked by Mahender Last Modified
Answer 
Java Spring Tricks & Best Practices
1. Use @RestController Instead of @Controller + @ResponseBody
@RestController
public class MyController {
@GetMapping("/hello")
public String hello() {
return "Hello, World!";
}
}
2. Enable Caching with @Cacheable
@Cacheable("users")
public User getUserById(Long id) { return userRepo.findById(id).get(); }
3. Use @Transactional for Automatic Rollback
@Transactional
public void transferMoney(Account from, Account to, double amount) { /* logic */ }
4. Profile-Based Configurations (@Profile)
@Profile("dev")
@Service
public class DevService { /* Development-specific code */ }
5. Use @Async for Background Tasks
@Async
public void sendEmail(String to) { /* Async email sending logic */ }
6. Externalize Configs with @Value
@Value("${app.name}")
private String appName;
7. Use Lombok to Reduce Boilerplate Code
@Getter @Setter @AllArgsConstructor
public class User { private String name; priv
ate int age; }
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