有时候项目中会遇到需要配置双数据源的情况，到SpringBoot2.0版本后和之前配置双数据源的方法有些区别，这里我用的SpringBoot版本是2.0.3，废话不多说，给出主要步骤： 一、项目依赖pom.xml配置 org.springframework.boot spring-boot-starter-parent 2.0.3.RELEASE org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-data-jpa com.microsoft.sqlserver mssql-jdbc runtime org.springframework.boot spring-boot-starter-test test mysql mysql-connector-java
二、application.properties配置文件配置 datasource.main.jdbc-url=jdbc:sqlserver://xxxxxxxxxx:1433;DatabaseName=xxx datasource.main.username=sa datasource.main.password=xxxxxxx datasource.main.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver spring.jpa.main.database=sql_server spring.jpa.hibernate.main-dialect=org.hibernate.dialect.SQLServer2008Dialect datasource.main.configuration.maximum-pool-size=30
datasource.second.jdbc-url=jdbc:mysql://localhost:3306/xxxxx?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC&useSSL=true datasource.second.username=root datasource.second.password=root datasource.second.driver-class-name=com.mysql.jdbc.Driver datasource.second.database=mysql datasource.second.configuration.maximum-pool-size=30 mybatis.configuration.mapUnderscoreToCamelCase=true spring.jpa.hibernate.second-dialect=org.hibernate.dialect.MySQL5Dialect
三、配置双数据源主要代码
1.创建主从数据源DataSourceConfig配置类 @Configuration public class DataSourceConfig {
@Bean(name = “primaryDataSource”) @Primary @Qualifier(“primaryDataSource”) @ConfigurationProperties(prefix = “datasource.main”) public DataSource primaryDatasource() { return DataSourceBuilder.create().build(); }
@Bean(name = “secondaryDataSource”) @Qualifier(“secondaryDataSource”) @ConfigurationProperties(prefix = “datasource.second”) public DataSource secondaryDataSource() { return DataSourceBuilder.create().build(); }
} 2.主数据源的配置 @Configuration @EnableTransactionManagement @EnableJpaRepositories( entityManagerFactoryRef = “entityManagerFactoryPrimary”,//配置连接工厂 entityManagerFactory transactionManagerRef = “transactionManagerPrimary”, //配置 事物管理器 transactionManager basePackages = {“com.greek.www.dao”}//设置持久层所在位置 ) public class PrimaryConfig {
@Autowired private JpaProperties jpaProperties;
@Autowired @Qualifier(“primaryDataSource”) private DataSource primaryDataSource;// 自动注入配置好的数据源
@Value("${spring.jpa.hibernate.main-dialect}") private String primaryDialect;// 获取对应的数据库方言
/** *
@param builder
@return */ @Bean(name = “entityManagerFactoryPrimary”) @Primary public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary(EntityManagerFactoryBuilder builder) {
return builder //设置数据源 .dataSource(primaryDataSource) //设置数据源属性 .properties(getVendorProperties(primaryDataSource)) //设置实体类所在位置.扫描所有带有 @Entity 注解的类 .packages(“com.greek.www.entity”) // Spring会将EntityManagerFactory注入到Repository之中.有了 EntityManagerFactory之后, // Repository就能用它来创建 EntityManager 了,然后 EntityManager 就可以针对数据库执行操作 .persistenceUnit(“primaryPersistenceUnit”) .build();
}
private Map<String, String> getVendorProperties(DataSource dataSource) { Map<String,String> map = new HashMap<>(); map.put(“hibernate.dialect”,primaryDialect);// 设置对应的数据库方言 //jpaProperties.getHibernate().getNaming().setPhysicalStrategy(“org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl”); jpaProperties.setProperties(map); return jpaProperties.getProperties(); }
/**
配置事物管理器@param builder@return */ @Bean(name = “transactionManagerPrimary”) @Primary PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) { return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject()); } } 3.从数据源的配置 @Configuration @EnableTransactionManagement @EnableJpaRepositories( entityManagerFactoryRef=“entityManagerFactorySecondary”, transactionManagerRef=“transactionManagerSecondary”, basePackages= { “com.greek.www.repository” }) public class SecondaryConfig {@Autowired private JpaProperties jpaProperties;
@Autowired @Qualifier(“secondaryDataSource”) private DataSource secondaryDataSource;
@Value("${spring.jpa.hibernate.second-dialect}") private String secondaryDialect;
@Bean(name = “entityManagerSecondary”) public EntityManager entityManager(EntityManagerFactoryBuilder builder) { return entityManagerFactorySecondary(builder).getObject().createEntityManager(); }
@Bean(name = “entityManagerFactorySecondary”) public LocalContainerEntityManagerFactoryBean entityManagerFactorySecondary (EntityManagerFactoryBuilder builder) { return builder .dataSource(secondaryDataSource) .properties(getVendorProperties(secondaryDataSource)) .packages(“com.greek.www.domain”) .persistenceUnit(“secondaryPersistenceUnit”) .build(); }
private Map<String, String> getVendorProperties(DataSource dataSource) { Map<String,String> map = new HashMap<>(); map.put(“hibernate.dialect”,secondaryDialect); // jpaProperties.getHibernate().getNaming().setPhysicalStrategy(“org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy”); //jpaProperties.getHibernate().getNaming().setImplicitStrategy(“org.springframework.boot.orm.jpa.hibernate.SpringImplicitNamingStrategy”); jpaProperties.setProperties(map); return jpaProperties.getProperties(); }
@Bean(name = “transactionManagerSecondary”) PlatformTransactionManager transactionManagerSecondary(EntityManagerFactoryBuilder builder) { return new JpaTransactionManager(entityManagerFactorySecondary(builder).getObject()); }
} 这样双数据源的配置就完成了，但是有一个问题我没有解决，就是mysql数据库有下划线的字段不能解析，必须在实体类中加上注解指定字段，比如：
@Column(name = "rpt_time") private Date rptTime;作者：坏菠萝 来源： 原文：https://blog.csdn.net/abcwanglinyong/article/details/85924615 版权声明：本文为博主原创文章，转载请附上博文链接！
