Spring Boot集成MyBatis配置多数据源详细教程
一、工程创建申明一点本案例使用的springboot版本是1.5.6.RELEASE。首先需要创建springBoot项目，添加springBoot框架对MyBatis支持的相关依赖Jar：分别添加MyBatis、MySQL以及W
一、工程创建
申明一点本案例使用的springboot版本是1.5.6.RELEASE。首先需要创建springBoot项目，添加springBoot框架对MyBatis支持的相关依赖Jar：分别添加MyBatis、MySQL以及Web依赖以及Druid依赖，这里添加Druid依赖必须是Spring boot支持的Druid，不能使用传统的Druid。完整的依赖jar如下：
<dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.28</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.3</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.15</version> <scope>runtime</scope> </dependency> </dependencies>
二、多数据源配置
接下来配置多数据源，首先在配置文件application.properties中配置2个数据库基本信息，然后配置两个DataSource即可，这里笔者把代码贴出来，并且附上解释说明信息。application.properties文件的配置：
server.port=7001
spring.application.name=springCloud-multiple-dataSources
spring.instance.instance-id=${spring.application.name}:${server.port}
## 数据源1的配置(此处***替换成自己数据库的连接串以及用户名和密码)
spring.datasource.wxdev.url= ****
spring.datasource.wxdev.username=****
spring.datasource.wxdev.password=****
spring.datasource.wxdev.driverClassName=com.mysql.jdbc.Driver
spring.datasource.wxdev.type=com.alibaba.druid.pool.DruidDataSource
## 数据源2的配置(此处***替换成自己数据库的连接串以及用户名和密码)
spring.datasource.platform.url=***
spring.datasource.platform.username=****
spring.datasource.platform.password=****
spring.datasource.platform.driverClassName=com.mysql.jdbc.Driver
spring.datasource.platform.type=com.alibaba.druid.pool.DruidDataSource
logging.config=classpath:logback_spring.xml
## mybatis mapper文件配置
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
mybatis.config-location=classpath:mybatis/mybatis-config.xml然后再定义两个DataSource的配置类(分别对应上面的2个数据源)，如下：
数据源1配置
@Configuration
@MapperScan(basePackages = "com.chenyun.cloud.mapper.wxdev",sqlSessionTemplateRef = "SqlSessionTemplate1")
public class DataSourceOneConfig {
private static final String MAPPER_LOCATION = "classpath:mybatis/mapper/wxdev/*.xml";
@Value("${spring.datasource.wxdev.url}")
private String url;
@Value("${spring.datasource.wxdev.username}")
private String user;
@Value("${spring.datasource.wxdev.password}")
private String password;
@Value("${spring.datasource.wxdev.driverClassName}")
private String driverClass;
@Bean
@Primary
public DataSource dataSourceOne() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(user);
dataSource.setPassword(password);
return dataSource;
}
@Bean(name = "dataSourceOneTransactionManager")
public DataSourceTransactionManager transactionManager() {
return new DataSourceTransactionManager(dataSourceOne());
}
@Bean(name = "SqlSessionFactory1")
public SqlSessionFactory getSqlSessionFactory1(@Qualifier("dataSourceOne") DataSource dataSource)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return sessionFactory.getObject();
}
@Bean(name = "SqlSessionTemplate1")
public SqlSessionTemplate getSqlSessionTemplate1(
@Qualifier("SqlSessionFactory1") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}数据源2配置
@Configuration
@MapperScan(basePackages = "com.chenyun.cloud.mapper.platform", sqlSessionTemplateRef = "SqlSessionTemplate2")
public class DataSourceTwoConfig {
private static final String MAPPER_LOCATION = "classpath:mybatis/mapper/platform/*.xml";
@Value("${spring.datasource.platform.url}")
private String url;
@Value("${spring.datasource.platform.username}")
private String user;
@Value("${spring.datasource.platform.password}")
private String password;
@Value("${spring.datasource.platform.driverClassName}")
private String driverClass;
@Bean(name = "dataSourceTwo")
public DataSource dataSourceTwo() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(user);
dataSource.setPassword(password);
return dataSource;
}
@Bean(name = "dataSourceOneTransactionManager")
public DataSourceTransactionManager transactionManager() {
return new DataSourceTransactionManager(dataSourceTwo());
}
@Bean(name = "SqlSessionFactory2")
public SqlSessionFactory getSqlSessionFactory2(@Qualifier("dataSourceTwo") DataSource dataSourceTwo)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSourceTwo);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return sessionFactory.getObject();
}
@Bean(name = "SqlSessionTemplate2")
public SqlSessionTemplate getSqlSessionTemplate2(
@Qualifier("SqlSessionFactory2") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}上面这个数据源配置类说明：在配置类上面加注解@Configuration表示这是一个可以被spring容器扫描到的配置类，配置类中注解@MapperScan表示要扫描的包路径com.chenyun.cloud.mapper.platform，即该包下的Mapper接口将操作dataSourceTwo中的数据，对应的SqlSessionFactory和SqlSessionTemplate分别是sqlSessionFactory2和sqlSessionTemplate2，在配置类内部，分别提供SqlSessionFactory和SqlSessionTemplate即可。需要注意的是，多数据源配置必须指定哪个数据源是主数据源，需用注解@Primary标明，例如本案例数据源dataSourceOne上的注解。
现在MyBatis多数据源就配置好了，接下来只需要在com.chenyun.cloud.mapper.wxdev和com.chenyun.cloud.mapper.platform包中提供不同的Mapper接口以及在resources目录下面创建不同xml映射文件。
接下来，在Service中注入两个不同的Mapper接口，就可以操作不同的数据源，关于springBoot集成MyBatis多数据源案例就分享到这里，如有问题，扫码关注公众号，联系笔者微信。
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