springboot2.x jpa接入多数据源

环境：springboot 2.1.4

数据源引入方式

• 数据源一

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "entityManagerFactoryPrimary",
        transactionManagerRef = "transactionManagerPrimary",
        basePackages = {"com.xxj.primary.repository"}
)
public class SourceDataConfig {

    @Autowired
    private HibernateProperties hibernateProperties;

    @Autowired
    private JpaProperties jpaProperties;

    private Map<String, Object> getVendorProperties() {
        return hibernateProperties.determineHibernateProperties(
                jpaProperties.getProperties(), new HibernateSettings()
        );
    }

    @Bean(name = "primaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary") # 配置数据源获取的涞源
    public DataSource primaryDataSource(){
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "entityManagerFactoryPrimary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(EntityManagerFactoryBuilder builder, @Qualifier("primaryDataSource") DataSource dataSource) {
        return builder.dataSource(dataSource)
                .properties(getVendorProperties())
                .packages("com.xxj.primary.model")
                .persistenceUnit("primaryPersistenceUnit")
                .build();
    }

    @Bean(name = "transactionManagerPrimary")
    public PlatformTransactionManager propertyTransactionManager(
            @Qualifier("entityManagerFactoryPrimary") EntityManagerFactory propertyEntityManagerFactory) {
        return new JpaTransactionManager(propertyEntityManagerFactory);
    }
}

• 数据源二

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "entityManagerFactorySecond",
        transactionManagerRef = "transactionManagerSecond",
        basePackages = {"com.xxj.second.repository"}
)
public class SecondDataConfig {

    @Autowired
    private HibernateProperties hibernateProperties;

    @Autowired
    private JpaProperties jpaProperties;

    private Map<String, Object> getVendorProperties() {
        Map<String, Object> map = hibernateProperties.determineHibernateProperties(
                jpaProperties.getProperties(), new HibernateSettings());return map;
    }

    @Primary
    @Bean(name = "secondDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.second")
    public DataSource targetDataSource(){
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = "entityManagerFactorySecond")
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(EntityManagerFactoryBuilder builder, @Qualifier("secondDataSource") DataSource dataSource) {
        return builder.dataSource(dataSource)
                .properties(getVendorProperties())
                .packages("com.xxj.second.model")
                .persistenceUnit("targetPersistenceUnit")
                .build();
    }

    @Primary
    @Bean(name = "transactionManagerSecond")
    public PlatformTransactionManager propertyTransactionManager(
            @Qualifier("entityManagerFactorySecond") EntityManagerFactory propertyEntityManagerFactory) {
        return new JpaTransactionManager(propertyEntityManagerFactory);
    }
}

数据源配置

spring.datasource.primary.jdbc-url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&serverTimezone=Asia/Shanghai&useSSL=false&requireSSL=false
spring.datasource.primary.username = root
spring.datasource.primary.password = 1234567
spring.datasource.primary.driver-class-name = com.mysql.jdbc.Driver

spring.datasource.second.jdbc-url = jdbc:mysql://localhost:3306/test2?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&serverTimezone=Asia/Shanghai&useSSL=false&rewriteBatchedStatements=true
spring.datasource.second.username = root
spring.datasource.second.password = 1234567
spring.datasource.second.driver-class-name = com.mysql.jdbc.Driver

springboot 2.x版本jpa多数据源引入跟1.x版本有些不太一样，还需要额外注意。

1. 获取jpa配置的方式
2. 数据源配置为jdbc-url

要注意：packages不能引用相同的model，否则会导致数据库卡死。