SpringBoot和Mybatis配置多个数据库

配置数据库连接信息(application.properties)
下面的是我自己的数据库的配置信息(需修改成自己的数据库信息)

spring.datasource.a.name=amy-blog-datasource
master.datasource.a.driverClassName=com.mysql.cj.jdbc.Driver
master.datasource.a.url=jdbc:mysql://XXXXX:28780/springboot_demo?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false&serverTimezone=UTC
master.datasource.a.username=root
master.datasource.a.password=XXXXX
second.datasource.b.name=bmy-blog-datasource
second.datasource.b.driverClassName=com.mysql.cj.jdbc.Driver
second.datasource.b.url=jdbc:mysql://XXXXXX:3306/halodb?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false&serverTimezone=UTC
second.datasource.b.username=root
second.datasource.b.password=XXXXX

读取配置的这两个数据库注入Bean中

a数据库配置到Bean容器中(需要修改自己的Dao路径和Mapper路径)

package com.site.blog.my.core.config;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;@Configuration
@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//需要修改自己的a数据库对应Dao层路径static final String PACKAGE = "com.site.blog.my.core.dao.master";//需要修改自己的a数据库对应mapper层路径static final String MAPPER_LOCATION = "classpath:mapper/master/*.xml";
//这里重点说一下，因为自己掉坑里了,我是mapper文件夹下有两个文件夹aa,bb,这里必须填到具体的文件夹，如mapper/aa或mapper/bb@Value("${master.datasource.a.url}")private String url;@Value("${master.datasource.a.username}")private String user;@Value("${master.datasource.a.password}")private String password;@Value("${master.datasource.a.driverClassName}")private String driverClass;@Bean(name = "masterDataSource")@Primarypublic DataSource masterDataSource() {DruidDataSource dataSource = new DruidDataSource();dataSource.setDriverClassName(driverClass);dataSource.setUrl(url);dataSource.setUsername(user);dataSource.setPassword(password);return dataSource;}@Bean(name = "masterTransactionManager")@Primarypublic DataSourceTransactionManager masterTransactionManager() {return new DataSourceTransactionManager(masterDataSource());}@Bean(name = "masterSqlSessionFactory")@Primarypublic 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();}
}

B数据库配置到Bean容器中(需要修改自己的Dao路径和Mapper路径)

package com.site.blog.my.core.config;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;@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//需要修改自己的a数据库对应Dao层路径static final String PACKAGE = "com.site.blog.my.core.dao.second";//需要修改自己的a数据库对应mapper层路径static final String MAPPER_LOCATION = "classpath:mapper/second/*.xml";@Value("${second.datasource.b.url}")private String url;@Value("${second.datasource.b.username}")private String user;@Value("${second.datasource.b.password}")private String password;@Value("${second.datasource.b.driverClassName}")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();}
}

我需要时https协议增加一个接口,接口数据又在另一个数据库中,故此返回JSON数据

@Controller
public class IndexController {@ResourceSecondData secondData;@RequestMapping(value = "findTagCqw",method = RequestMethod.GET)@ResponseBodypublic String getTagInfo(){final List<Object> tagInfo = secondData.findTagInfo();return JSON.toJSONString(tagInfo);}
}

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