Spring Boot 2.0多数据源配置

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两个数据库实例，一个负责读，一个负责写。

datasource-reader:
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://192.168.43.61:3306/test?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false
    username: icbc
    password: icbc
    driver-class-name: com.mysql.jdbc.Driver
    continue-on-error: false
    sql-script-encoding: UTF-8

datasource-writer:
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://192.168.43.61:3306/hdfs?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false
    username: icbc
    password: icbc
    driver-class-name: com.mysql.jdbc.Driver
    continue-on-error: false
    sql-script-encoding: UTF-8

读数据库配置

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactoryPrimary", transactionManagerRef = "transactionManagerPrimary", basePackages = {
        "cn.cib.repository.read"})
public class RepositoryPrimaryConfig {

    @Autowired
    @Qualifier("r_ds")
    private DataSource r_ds;

    @Bean(destroyMethod = "", name = "entityManagerPrimary")
    @Primary
    public EntityManager entityManager() {
        return entityManagerFactoryPrimary().getObject().createEntityManager();
    }

    @Bean(destroyMethod = "", name = "entityManagerFactoryPrimary")
    @Primary
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary() {
        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();

        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
        factoryBean.setDataSource(r_ds);
        factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        factoryBean.setJpaProperties(HibernatePropertiesBuilder.hibernateProperties());
        factoryBean.setPackagesToScan("cn.cib.repository.read", "cn.cib.entity.read");
        factoryBean.setPersistenceUnitName("read");
        return factoryBean;
    }

    @Bean(destroyMethod = "", name = "transactionManagerPrimary")
    @Primary
    PlatformTransactionManager transactionManagerPrimary() {
        return new JpaTransactionManager(entityManagerFactoryPrimary().getObject());
    }

}

写数据库配置

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactorySecondary", transactionManagerRef = "transactionManagerSecondary", basePackages = {
        "cn.cib.repository.write"})
public class RepositorySecondaryConfig {

    @Autowired
    @Qualifier("w_ds")
    private  DataSource w_ds;

    @Bean(destroyMethod = "", name = "entityManagerSecondary")
    public  EntityManager entityManager() {
        return entityManagerFactorySecondary().getObject().createEntityManager();
    }

    @Bean(destroyMethod = "", name = "entityManagerFactorySecondary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactorySecondary() {
        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();

        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
        factoryBean.setDataSource(w_ds);
        factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        factoryBean.setJpaProperties(HibernatePropertiesBuilder.hibernateProperties());
        factoryBean.setPackagesToScan("cn.cib.repository.write","cn.cib.entity.write");
        factoryBean.setPersistenceUnitName("write");
        return factoryBean;
    }

    @Bean(destroyMethod = "", name = "transactionManagerSecondary")
    PlatformTransactionManager transactionManagerSecondary() {
        return new JpaTransactionManager(entityManagerFactorySecondary().getObject());
    }

}

Hibernate相关属性配置

public class HibernatePropertiesBuilder {

    public static Properties hibernateProperties() {
        final Properties hibernateProperties = new Properties();
        hibernateProperties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        hibernateProperties.setProperty("hibernate.hbm2ddl.auto", "update");
        hibernateProperties.setProperty("hibernate.show_sql", "true");
        hibernateProperties.setProperty("hibernate.format_sql", "true");
        return hibernateProperties;
    }
}

更多源码请参考链接：

https://github.com/ypmc/spring-cloud/tree/master/spring-batch