JPA实体类监听器@EntityListeners注解使用实例

 
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());
    }
}

@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);
    }
 
}