Springboot+MyBatis配置多数据源

结构：

先配置pom：

<dependencies>
        <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>1.3.2</version>
        </dependency>
        <!--<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
    </dependencies>


<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <!--    防止Mapper映射文件被过滤    -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resource</directory>
            </resource>
        </resources>
    </build>

配置数据源：

#Mybatis多数据源，两个不同的库
spring.datasource.one.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.one.url=jdbc:mysql://localhost:3306/dsjyone?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.one.username=root
spring.datasource.one.password=123456

spring.datasource.two.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.two.url=jdbc:mysql://localhost:3306/dsjytwo?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.two.username=root
spring.datasource.two.password=123456

配置类：

@Configuration
public class DataSourceConfig {
    @Bean
    @ConfigurationProperties("spring.datasource.one")
    DataSource dsOne(){
        return DruidDataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties("spring.datasource.two")
    DataSource dsTwo(){
        return DruidDataSourceBuilder.create().build();
    }
}

先配置MyBatis，提供实例：

@Configuration
@MapperScan(value = "com.jpa.mapper1",sqlSessionFactoryRef = "sqlSessionFactoryBean1")
public class MyBatisConfigOne {

    @Autowired
    @Qualifier("dsOne")
    DataSource dsOne;
    @Bean
    SqlSessionFactory sqlSessionFactoryBean1() throws Exception{
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dsOne);
        return factoryBean.getObject();
    }

    @Bean
    SqlSessionTemplate sqlSessionTemplate1() throws Exception {
        return new SqlSessionTemplate(sqlSessionFactoryBean1());
    }

}

@Configuration
@MapperScan(value = "com.jpa.mapper2",sqlSessionFactoryRef = "sqlSessionFactoryBean2")
public class MyBatisConfigTwo {
    @Autowired
    @Qualifier("dsTwo")
    DataSource dsTwo;
    @Bean
    SqlSessionFactory sqlSessionFactoryBean2() throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dsTwo);
        return factoryBean.getObject();
    }

    @Bean
    SqlSessionTemplate sqlSessionTemplate2() throws Exception {
        return new SqlSessionTemplate(sqlSessionFactoryBean2());
    }
}

创建mapper和xml，以1为例：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.jpa.mapper1.BookMapper1">
    <select id="getAllBooks" resultType="com.jpa.entity.Book">
        select * from book;
    </select>
</mapper>

@Repository
public interface BookMapper1 {
    public List<Book> getAllBooks();
}

控制器，太懒了，直接用的mapper：

@Autowired
    BookMapper1 bookMapper1;
    @Autowired
    BookMapper2 bookMapper2;


    @RequestMapping("getAllBooks")
    public void getAllBooks(){
        List<Book> list1 = bookMapper1.getAllBooks();
        List<Book> list2 = bookMapper2.getAllBooks();
        System.out.println("11111"+list1.get(0).getName());
        System.out.println("22222"+list2.get(0).getName());

    }