hibernate 5.3.6.Final 用SchemaExport 生成表结构

最新推荐文章于 2021-08-10 08:24:26 发布

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最新推荐文章于 2021-08-10 08:24:26 发布

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分类专栏： java 文章标签： java hibernate 生成表结构

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本文详细介绍Hibernate配置文件hibernate.cfg.xml的设置，包括数据库连接、Dialect选择及依赖配置。并演示如何通过Java代码生成数据库表结构，适用于Hibernate 5.3及以上版本。

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- 配置hibernate.cfg.xml

   <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE hibernate-configuration PUBLIC
    		"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    		"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
    <hibernate-configuration>
    	<session-factory>
    		<property name="connection.username">root</property>
    		<property name="connection.password"></property>
    		<property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
    		<property name="connection.url"><![CDATA[jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=PRC&useOldAliasMetadataBehavior=true]]></property>
    		<property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
    		<property name="show_sql">true</property>
    		<property name="format_sql">true</property>
    		<property name="hbm2ddl.auto">update</property>
    		<property name="hibernate.current_session_context_class">thread</property>
    		<mapping class="com.entity.Students" />
    	</session-factory>
    </hibernate-configuration>

- 生成表结构

    package com.entity;
    import java.util.EnumSet;
    
    import org.hibernate.boot.Metadata;
    import org.hibernate.boot.MetadataSources;
    import org.hibernate.boot.registry.StandardServiceRegistry;
    import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
    import org.hibernate.tool.hbm2ddl.SchemaExport;
    import org.hibernate.tool.schema.TargetType;
    import org.junit.Test;
    
    public class TestStudents {
    
    	@SuppressWarnings("unused")
    	@Test
    	public void testSchemaExport() {
    
    		// 1.创建服务注册对象
    		final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
    				.configure().build();
    		// 2.生成Metadata 
    		Metadata metadata = new MetadataSources(registry).buildMetadata();    
    		// 3.生成表结构
    		SchemaExport schemaExport = new SchemaExport();
    		schemaExport.create(EnumSet.of(TargetType.DATABASE), metadata);
    
    	}
    }

- pom依赖清单

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.10</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>5.3.6.Final</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.12</version>
		</dependency>
	</dependencies>

- 小结