Spring Boot MyBatis配置多数据源

SpringBoot

项目中有时候需要用到多数据源，但是Spring Boot的自动配置并不支持，所以需要手动做很多工作，其实也不难

整体架构

添加依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.0.1</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.15</version>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

First数据源配置

• FirstDataSourceConfig

@Configuration
@MapperScan(basePackages = "com.tenmao.multiplemybatis.mapper.first",sqlSessionFactoryRef = "firstSqlSessionFactory")
public class FirstDataSourceConfig {
    @Bean(name = "firstDataSource")
    @ConfigurationProperties("datasource.first")
    public DataSource firstDataSource(){
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "firstSqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("firstDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sessionFactoryBean.setDataSource(dataSource);
        sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
        .getResources("classpath*:mapper/first/*.xml"));
        return sessionFactoryBean.getObject();
    }
}

Second数据源配置

• SecondDataSourceConfig

@Configuration
@MapperScan(basePackages = "com.tenmao.multiplemybatis.mapper.second",sqlSessionFactoryRef = "secondSqlSessionFactory")
public class SecondDataSourceConfig {
    @Bean(name = "secondDataSource")
    @ConfigurationProperties("datasource.second")
    public DataSource secondDataSource(){
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "secondSqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("secondDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sessionFactoryBean.setDataSource(dataSource);
        sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources("classpath*:mapper/second/*.xml"));
        return sessionFactoryBean.getObject();
    }
}

配置信息

• application.properties

datasource.first.jdbcUrl=jdbc:mysql://127.0.0.1:3306/blog-first?useUnicode=true&characterEncoding=UTF8&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2B8
datasource.first.driverClassName=com.mysql.cj.jdbc.Driver
datasource.first.username=tenmao
datasource.first.password=123456


datasource.second.jdbcUrl=jdbc:mysql://127.0.0.1:3306/blog-second?useUnicode=true&characterEncoding=UTF8&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2B8
datasource.second.driverClassName=com.mysql.cj.jdbc.Driver
datasource.second.username=tenmao
datasource.second.password=123456

使用

@SpringBootApplication
public class MultipleMybatisApplication {
    @Resource
    private PersonMapper personMapper;
    @Resource
    private CarMapper carMapper;

    public static void main(String[] args) {
        SpringApplication.run(MultipleMybatisApplication.class, args);
    }
    @Bean
    public CommandLineRunner commandLineRunner(ApplicationContext context) {
        return args -> {
            Person person = personMapper.selectById(1);
            System.out.println(person);
            Car car = carMapper.selectById(1);
            System.out.println(car);
        };
    }
}

注意事项

• datasource.first.jdbcUrl：注意是jdbcUrl而不是url
• 按照这种配置，发现其实并不需要添加注解@EnableAutoConfiguration

@SpringBootApplication
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class,DataSourceTransactionManagerAutoConfiguration.class, MybatisAutoConfiguration.class})

参考

• springboot mybatis多数据源配置

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