springboot+mybatis+druid 多数据源

1. 创建maven项目，引入依赖

         <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>1.3.5</version> <!--低版本可以解决mybatis不支持LocalDateTime问题-->
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!--druid数据源 start-->
        <!--配置druid多数据源时，要使用druid-spring-boot-starter包,否则会报错
          java: 程序包com.alibaba.druid.spring.boot.autoconfigure不存在
        -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.22</version>
        </dependency>
        <!--druid数据源 end-->
 

2. 配置多数据源

配置数据库连接 application.yml

 spring:
  datasource:
    # 数据源1
    url: jdbc:mysql://****:3306/dataSourceManagement?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai&allowMultiQueries=true
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource
    #数据源2
    icp:
      url: jdbc:mysql://****:3306/icp_rule?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai&allowMultiQueries=true
      username: root
      password: root
      type: com.alibaba.druid.pool.DruidDataSource
 

数据源配置类（druid配置，mybatis配置），通过 @MapperScan(basePackages = "com.example.datasource.mapper",sqlSessionTemplateRef = "primarySqlSessionTemplate") 注解将数据源与mapper文件对应

数据源1配置类

 @Configuration
@MapperScan(basePackages = "com.example.datasource.mapper",sqlSessionTemplateRef = "primarySqlSessionTemplate")
public class PrimaryDataSourceConfig {

    /**
    * 数据源配置
    *
    * @return
    */
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    DataSource primaryDs() {
        // 如果使用 druid 作为连接池，则需要使用DruidDataSourceBuilder
        return DruidDataSourceBuilder.create().build();
    }


    /**
    * mybatis配置SqlSessionFactory和SqlSessionTemplate
    *
    * @return
    */
    @Bean
    SqlSessionFactory primarySqlSessionFactory() {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(primaryDs());
        SqlSessionFactory sqlSessionFactory = null;
        try {
            sqlSessionFactory = sqlSessionFactoryBean.getObject();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return sqlSessionFactory;
    }

    @Bean
    SqlSessionTemplate primarySqlSessionTemplate() {
        return new SqlSessionTemplate(primarySqlSessionFactory());
    }
}
 

数据源2配置类

 @Configuration
@MapperScan(basePackages = "com.example.datasource.icpMapper", sqlSessionTemplateRef = "icpSqlSessionTemplate")
public class IcpDataSourceConfig {

    /**
    * 数据源配置
    *
    * @return
    */
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.icp")
    DataSource icpDs() {
        // 如果使用 druid 作为连接池，则需要使用DruidDataSourceBuilder
        return DruidDataSourceBuilder.create().build();
    }


    /**
    * mybatis配置SqlSessionFactory和SqlSessionTemplate
    *
    * @return
    */
    @Bean
    SqlSessionFactory icpSqlSessionFactory() {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(icpDs());
        SqlSessionFactory sqlSessionFactory = null;
        try {
            sqlSessionFactory = sqlSessionFactoryBean.getObject();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return sqlSessionFactory;
    }

    @Bean
    SqlSessionTemplate icpSqlSessionTemplate() {
        return new SqlSessionTemplate(icpSqlSessionFactory());
    }
}
 

完成，接下来编写mapper,数据源1的mapper写在 mapper 目录下，数据源2的mapper写在 icpMapper 目录项，再service层注入即可使用

springboot整合mybatis+mysql+druid 多个数据源

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