11、Springboot 方式搭建mybatis + 多数据源

1、配置数据源信息

     编辑application.yml文件，代码如下

spring:
  application:
    name:@project.name@
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    time-zone: GMT+8
    default-property-inclusion: non_null
  thymeleaf:
    mode: LEGACYHTML5
    encoding: UTF-8
    prefix: classpath:/templates/
    suffix: .html
    cache: false
    servlet:
      content-type: text/html
custom:
  ds:
    oracle:
      driverClassName: oracle.jdbc.OracleDriver
      jdbcUrl: jdbc:oracle:thin:@XXXXX:1521/XXXXX
      username: XXXXX
      password: XXXXX

    sqlserver:
      driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver
      jdbcUrl: jdbc:sqlserver://XXXXX:1433;DatabaseName=XXXXX
      username: XXXXX
      password: XXXXX
server:
  port: 80

上面配置代码中加入了oracle和sqlserver两种数据源，为此，在这之前，需要针对pom.xml的配置文件引入相关Jar包

     编辑pom.xml配置文件，代码如下

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>com.zaxxer</groupId>
    <artifactId>HikariCP</artifactId>
    <version>2.5.1</version>
</dependency>
<dependency>
    <groupId>com.microsoft.sqlserver</groupId>
    <artifactId>mssql-jdbc</artifactId>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>ojdbc6</artifactId>
    <version>6.0</version>
    <scope>system</scope>
    <systemPath>${project.basedir}/src/main/resources/lib/ojdbc6.jar</systemPath>
</dependency>

上面配置代码ojdbc6.jar为本地引入的jar包，自行下载完，放置到/resources/lib目录下

2、配置类

   Oracle数据源配置类，代码如下

package com.XXXXX.XXXXX.config;

import com.zaxxer.hikari.HikariDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
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;

@Configuration
@MapperScan(basePackages = "com.XXXXX.XXXXX.mapper.oracle", sqlSessionTemplateRef  = "primarySqlSessionTemplate")
public class OracleSqlSessionFactory {

    /**
     * 第一数据源：Oracle
     * @return
     */
    @Bean(name = "primaryDataSource")
    @Qualifier("primaryDataSource")
    @ConfigurationProperties(prefix = "custom.ds.oracle")
    public DataSource oracleDataSource() {
        return DataSourceBuilder.create().type(HikariDataSource.class).build();
    }

    @Bean(name = "primarySqlSessionFactory")
    public SqlSessionFactory primarySqlSessionFactory(@Qualifier("primaryDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/oracle/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "primaryTransactionManager")
    public DataSourceTransactionManager primaryTransactionManager(@Qualifier("primaryDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "primarySqlSessionTemplate")
    public SqlSessionTemplate primarySqlSessionTemplate(@Qualifier("primarySqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

   SqlServer数据源配置类，代码如下

package com.XXXXX.XXXXX.config;

import com.zaxxer.hikari.HikariDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
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;

@Configuration
@MapperScan(basePackages = "com.XXXXX.XXXXX.mapper.sqlserver", sqlSessionTemplateRef  = "secondSqlSessionTemplate")
public class SqlserverSqlSessionFactory {

    /**
     * 第二数据源：SqlServer
     * @return
     */
    @Bean(name = "secondDataSource")
    @Qualifier("secondDataSource")
    @ConfigurationProperties(prefix = "custom.ds.sqlserver")
    public DataSource secondDataSource() {
        return DataSourceBuilder.create().type(HikariDataSource.class).build();
    }

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

    @Bean(name = "secondTransactionManager")
    public DataSourceTransactionManager secondTransactionManager(@Qualifier("secondDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "secondSqlSessionTemplate")
    public SqlSessionTemplate secondSqlSessionTemplate(@Qualifier("secondSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

项目截图如下

最后不要忘记最重要的一点，在Springboot启动类上添加注解 @EnableAutoConfiguration 使其自动配置生效