基于JPA实体类监听器@EntityListeners注解的使用实例

import org.springframework.stereotype.Component;
import javax.persistence.PostPersist;
import javax.persistence.PostUpdate;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
public class TestEntityListeners {
	@PrePersist
	public void PrePersist(Object entity){
		System.out.println("开始保存--"+entity.toString());
	}
	@PreUpdate
	public void PreUpdate(Object entity){
		System.out.println("开始更新--"+entity.toString());
	}
 
	@PostPersist
	public void PostPersist(Object entity){
		System.out.println("结束保存--"+entity.toString());
	}
 
       @PostUpdate
	public void PostUpdate(Object entity){
		System.out.println("结束更新--"+entity.toString());
	}
}

@EntityListeners(value = {TestEntityListeners.class})

@Entity
@Table(name = "product")
@EntityListeners(value = {TestEntityListeners.class})
public class Product {
	private int id;
	private String productId;
	private String productName;
    //getter setter toString()
}

import com.goods.evaluate.entity.Product;
import com.goods.evaluate.service.TestService1;
import com.goods.evaluate.repository.ProductRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional; 
import java.util.Optional; 
@Service
public class TestService implements TestService1 { 
	@Autowired
	private ProductRepository productRepository; 
	@Transactional
	public void testSave(){
		Optional<Product> product = productRepository.findById(10);
		productRepository.save(product.orElse(null));
		System.out.println("保存。。。");
	} 
	@Transactional
	public void testUpdate(){
		productRepository.updateProduct("test10");
		System.out.println("更新。。。");
	}
}

@SpringBootApplication
@EnableSpringConfigured
@EnableJpaAuditing
@EnableAspectJAutoProxy(proxyTargetClass=true)
public class EvaluateApplication { 
	public static void main(String[] args) {
		SpringApplication.run(EvaluateApplication.class, args);
	} 
}

//AuditorAware 实现类，指定当前操作用户信息
@Configuration
public class UserAuditorConfig implements AuditorAware<String> {
    @Override
    public Optional<String> getCurrentAuditor() {
        return Optional.of(SpringSecurityHolder.currentUserName());
    }
}