Spring-data jpa学习之路（第一站）

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• Spring-data jpa学习之路（第一站）
• • Hibernate&Jpa的快速创建
  • 总结

实体类Customer:

package com.alice.pojo;

import javax.persistence.*;

@Entity
@Table(name = "td_customer")
public class Customer {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "cust_id")
    private Long custId;

    @Column(name = "cust_name")
    private String custName;

    @Column(name = "cust_address")
    private String custAddress;

    public Long getCustId() {
        return custId;
    }

    public void setCustId(Long custId) {
        this.custId = custId;
    }

    public String getCustName() {
        return custName;
    }

    public void setCustName(String custName) {
        this.custName = custName;
    }

    public String getCustAddress() {
        return custAddress;
    }

    public void setCustAddress(String custAddress) {
        this.custAddress = custAddress;
    }

    @Override
    public String toString() {
        return "Customer{" +
                "custId=" + custId +
                ", custName='" + custName + ''' +
                ", custAddress='" + custAddress + ''' +
                '}';
    }
}

hibernate.cfg.xml配置详情

    
        
        com.mysql.cj.jdbc.Driver
        jdbc:mysql://localhost:3306/springdata_jpa?serverTimezone=UTC&characterEncoding=UTF-8
        root
        root


        
        
        true
        
        true
        
        update

        org.hibernate.dialect.MySQL8Dialect
        
        

        

        
        
    

persistence.xml配置详情

    
        
        
        
        org.hibernate.jpa.HibernatePersistenceProvider

        
        com.alice.pojo.Customer

        
            
            
            
            
            

            
            
            
            
            

        
    

HibernateTest测试类

package com.alice.test;

import com.alice.pojo.Customer;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.junit.Before;
import org.junit.Test;

import java.util.List;

public class HibernateTest {

    //session工厂，:数据库的一个会话，代码持久化操作数据库的桥梁

    private SessionFactory sf;

    @Before
    public void init(){
        StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure("/hibernate.cfg.xml").build();
        sf = new MetadataSources(registry).buildMetadata().buildSessionFactory();
    }

    @Test
    public void testC(){

        try(Session session = sf.openSession()){
            Transaction transaction = session.beginTransaction();
            Customer customer = new Customer();
            customer.setCustName("AIX");
            session.save(customer);
            transaction.commit();
        }
    }
    @Test
    public void testR(){

        try(Session session = sf.openSession()){
            Transaction transaction = session.beginTransaction();
            String hql = " FROM Customer ";
            List resultList = session.createQuery(hql, Customer.class).getResultList();
            System.out.println(resultList);
            transaction.commit();
        }
    }
    @Test
    public void testR2(){

        try(Session session = sf.openSession()){
            Transaction transaction = session.beginTransaction();
            String hql = " FROM Customer where custId=:id";
            List resultList = session.createQuery(hql, Customer.class)
                    .setParameter("id",1L)
                    .getResultList();
            System.out.println(resultList);
            transaction.commit();
        }
    }

}

JpaTest测试类

package com.alice.test;

import com.alice.pojo.Customer;
import org.junit.Before;
import org.junit.Test;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

public class JpaTest {

    EntityManagerFactory factory;

    @Before
    public void before(){
        factory = Persistence.createEntityManagerFactory("hibernateJPA");
    }

    @Test
    public void testC(){
        EntityManager entityManager = factory.createEntityManager();
        EntityTransaction tx = entityManager.getTransaction();
        tx.begin();
        Customer customer = new Customer();
        customer.setCustName("张三");
        entityManager.persist(customer);
        tx.commit();
    }
}

依赖

        
            junit
            junit
            4.13
            test
        
        
            org.hibernate
            hibernate-entitymanager
            5.4.32.Final
        
        
        
            mysql
            mysql-connector-java
            8.0.19
            runtime
        


    

上述所讲主要是集成hibernate，之后以hibernate为基础继承Jpa