Mybatis多数据源配置

pom.xml

<!-- Spring Boot Mybatis 依赖 -->
<dependency>
  <groupId>org.mybatis.spring.boot</groupId>
  <artifactId>mybatis-spring-boot-starter</artifactId>
  <version>1.2.0</version>
</dependency>
 
<!-- MySQL 连接驱动依赖 -->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>5.1.39</version>
</dependency>
 
<!-- Druid 数据连接池依赖 -->
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>druid</artifactId>
  <version>1.0.18</version>
</dependency>

application.properties 配置两个数据源配置

# master 数据源配置
master:
  datasource:
    url: jdbc:sqlserver://localhost:1433;DatabaseName=RYAccountsDB
    driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver
    username: sa
    password: sa!@123
    initial-size: 1
    min-idle: 1
    max-active: 20
    test-on-borrow: true
    max-wait: 60000
    time-between-eviction-runs-millis: 60000
    min-evictable-idle-time-millis: 300000
    validation-query: SELECT 1 FROM DUAL
    test-While-Idle: true
    test-on-return: false
    pool-prepared-statements: false
    max-pool-prepared-statement-per-connection-size: 20
    filters: stat,wall,log4j,config
# second 数据源配置
second:
  datasource:
    url: jdbc:mysql://localhost:33306/game_score_log?serverTimezone=GMT&useUnicode=true&characterEncoding=utf8
    username: root
    password: 1q2w#E4r
    driver-class-name: com.mysql.cj.jdbc.Driver
    max-idle: 10
    max-wait: 10000
    min-idle: 5
    initial-size: 5
server:
  port: 7000

数据源配置

多数据源配置的时候注意，必须要有一个主数据源，即 MasterDataSourceConfig 配置

@Primary 标志这个 Bean 如果在多个同类 Bean 候选时，该 Bean 优先被考虑。「多数据源配置的时候注意，必须要有一个主数据源，用 @Primary 标志该 Bean
@MapperScan 扫描 Mapper 接口并容器管理，包路径精确到 master，为了和下面 cluster 数据源做到精确区分
@Value 获取全局配置文件 application.properties 的 kv 配置,并自动装配sqlSessionFactoryRef 表示定义了 key ，表示一个唯一 SqlSessionFactory 实例

MasterDataSourceConfig的代码：

package com.cjrh.game_api.jdbc;
 
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
 
import javax.sql.DataSource;
 
 
/**
 * @program: game_api
 * @description:
 * @author: Dading
 * @create: 2019-04-12 14:14
 * @version: 1.0
 **/
@Configuration
// 扫描 Mapper 接口并容器管理
@MapperScan(basePackages = MasterDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "masterSqlSessionFactory")
public class MasterDataSourceConfig {
 
 
    // 精确到 master 目录，以便跟其他数据源隔离
    static final String PACKAGE = "com.cjrh.game_api.dao.master";
    static final String MAPPER_LOCATION = "classpath:mapper/master/*.xml";
 
    @Value("${master.datasource.url}")
    private String url;
 
    @Value("${master.datasource.username}")
    private String user;
 
    @Value("${master.datasource.password}")
    private String password;
 
    @Value("${master.datasource.driver-class-name}")
    private String driverClass;
 
    @Bean(name = "masterDataSource")
    @Primary
    public DataSource masterDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }
 
    @Bean(name = "masterTransactionManager")
    @Primary
    public DataSourceTransactionManager masterTransactionManager() {
        return new DataSourceTransactionManager(masterDataSource());
    }
 
    @Bean(name = "masterSqlSessionFactory")
    @Primary
    public SqlSessionFactory masterSqlSessionFactory(@Qualifier("masterDataSource") DataSource masterDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(masterDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(MasterDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
 
}

第二个数据源SecondDataSourceConfig的配置如下:

package com.cjrh.game_api.jdbc;
 
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
 
import javax.sql.DataSource;
 
/**
 * @program: game_api
 * @description:
 * @author: Dading
 * @create: 2019-04-12 14:14
 * @version: 1.0
 **/
@Configuration
// 扫描 Mapper 接口并容器管理
@MapperScan(basePackages = SecondDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "secondSqlSessionFactory")
public class SecondDataSourceConfig {
 
    // 精确到 cluster 目录，以便跟其他数据源隔离
    static final String PACKAGE = "com.cjrh.game_api.dao.second";
    static final String MAPPER_LOCATION = "classpath:mapper/second/*.xml";
 
    @Value("${second.datasource.url}")
    private String url;
 
    @Value("${second.datasource.username}")
    private String user;
 
    @Value("${second.datasource.password}")
    private String password;
 
    @Value("${second.datasource.driver-class-name}")
    private String driverClass;
 
    @Bean(name = "secondDataSource")
    public DataSource clusterDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }
 
    @Bean(name = "secondTransactionManager")
    public DataSourceTransactionManager clusterTransactionManager() {
        return new DataSourceTransactionManager(clusterDataSource());
    }
 
    @Bean(name = "secondSqlSessionFactory")
    public SqlSessionFactory clusterSqlSessionFactory(@Qualifier("secondDataSource") DataSource clusterDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(clusterDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(SecondDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}