Hibernate 使用注释
Hibernate使用注释有个好处就是我们不需要建立.hbm.xml文件，直接在实体类中添加注解就可以完成往数据库中进行数据操作
配置文件：hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC ???"-//Hibernate/Hibernate Configuration DTD//EN" ???"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration> ???<session-factory> ???????<!-- Database connection settings --> ?????<property name="connection.driver_class">com.mysql.jdbc.Driver</property> ?????<property name="connection.url">jdbc:mysql://localhost:3306/student?serverTimezone=UTC</property> ?????<property name="connection.username">root</property> ?????<property name="connection.password">123456</property> ?????<!-- JDBC connection pool (use the built-in) --> ?????<!-- <property name="connection.pool_size">1</property> --> ?????<!-- SQL dialect 方言 MySQLDialect不同数据库不一样--> ?????<property name="dialect">org.hibernate.dialect.MySQLDialect</property> ?????<!-- Enable Hibernate‘s automatic session context management --> ?????<!-- <property name="current_session_context_class">thread</property> --> ?????<!-- Disable the second-level cache --> ?????<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property> ?????<!-- Echo all executed SQL to stdout ?生产的sql打印出来--> ?????<property name="show_sql">true</property> ?????<!-- <mapping resource="com/xxc/model/Student.hbm.xml"></mapping> --> ?????<mapping class="com.xxc.model.Teacher"></mapping> ???</session-factory></hibernate-configuration>
实体类Teacher.java
package com.xxc.model;import javax.persistence.Entity;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name="teacher")public class Teacher { ???private int id; ???private String name; ???private String title; ???@Id ???public int getId() { ???????return id; ???} ???public void setId(int id) { ???????this.id = id; ???} ???public String getName() { ???????return name; ???} ???public void setName(String name) { ???????this.name = name; ???} ???public String getTitle() { ???????return title; ???} ???public void setTitle(String title) { ???????this.title = title; ???} ???}操作类TeacherTest.java
在这里，我们使用StandardServiceRegistryBuilder类和MetadataSources类从持久化类获取映射的信息。
package hibernateTest;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.boot.MetadataSources;import org.hibernate.boot.registry.StandardServiceRegistry;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import com.xxc.model.Teacher;public class TeacherTest { ???public static void main(String[] args) { ???????Teacher t = new Teacher(); ???????t.setId(1); ???????t.setName("xxc"); ???????t.setTitle("高级"); ???????final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure("hibernate.cfg.xml").build(); ???????SessionFactory sf = new MetadataSources(registry).buildMetadata().buildSessionFactory(); ???????Session session = sf.openSession(); ???????//开始事务 ???????????session.beginTransaction(); ???????session.save(t); ???????//结束事务 ???????session.getTransaction().commit(); ???????session.close(); ???????sf.close(); ???}}Hibernate 使用注释
原文地址：https://www.cnblogs.com/alex-xxc/p/9751901.html