这篇“springboot怎么连接两个数据库”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“springboot怎么连接两个数据库”文章吧。
1.启动类需要不用加mybatis的@MapperScan注解
计算
安全
数据库
网络和加速
企业服务
@SpringBootApplication
public class AppPush {
public static void main(String[] args) {
SpringApplication.run(AppPush.class,args);
}
}配置俩个或多个数据库连接，我这里用的是postgresql，用mysql等也是一样
spring:
datasource:
# driver-class-name: org.postgresql.Driver
# url: jdbc:postgresql://127.0.0.1/aaa
# username: root
# password: root
one:
driver-class-name: org.postgresql.Driver
url: jdbc:postgresql://127.0.0.1/aaa
username: root
password: root
two:
driver-class-name: org.postgresql.Driver
url: jdbc:postgresql://127.0.0.1/bbb
username: root
password: root1.注意：@MapperScan 的basePackages就是你包的路径 ，
sqlSessionFactoryRef 可以随便起名 但是着两个类不能重复！
One配置类
package com.wys.config;
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.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
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.DriverManagerDataSource;
import javax.sql.DataSource;
/**
* @program:
* @description: 数据库配置1
* @author: wys
* @create: 2019-12-03 16:20
**/
@Configuration
@MapperScan(basePackages = "com.wys.mapper.**", sqlSessionFactoryRef = "oneSqlSessionFactory")
public class OneDataSourceConfig {
@Value("${spring.datasource.one.driver-class-name}")
String driverClass;
@Value("${spring.datasource.one.url}")
String url;
@Value("${spring.datasource.one.username}")
String userName;
@Value("${spring.datasource.one.password}")
String passWord;
@Primary
@Bean(name = "oneDataSource")
@ConfigurationProperties("spring.datasource.one")
public DataSource masterDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(userName);
dataSource.setPassword(passWord);
return dataSource;
}
@Bean(name = "oneSqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(@Qualifier("oneDataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource);
sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
.getResources("classpath:mybatis/mapper-postgre/*.xml"));
return sessionFactoryBean.getObject();
}
@Bean(name = "oneSqlSessionTemplate")
public SqlSessionTemplate sqlSessionFactoryTemplate(@Qualifier("oneSqlSessionFactory")SqlSessionFactory sqlSessionFactory ) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}Two配置类
package com.wys.config;
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.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
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.DriverManagerDataSource;
import javax.sql.DataSource;
/**
* @program:
* @description: 数据库配置2
* @author: wys
* @create: 2019-12-03 17:03
**/
@Configuration
@MapperScan(basePackages = "com.wys.mappers",sqlSessionFactoryRef = "twoSqlSessionFactory")
public class TwoDataSourceConfig {
@Value("${spring.datasource.two.driver-class-name}")
String driverClass;
@Value("${spring.datasource.two.url}")
String url;
@Value("${spring.datasource.two.username}")
String userName;
@Value("${spring.datasource.two.password}")
String passWord;
@Bean(name = "twoDataSource")
@ConfigurationProperties("spring.datasource.two")
public DataSource masterDataSource(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(userName);
dataSource.setPassword(passWord);
return dataSource;
}
@Bean(name = "twoSqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(@Qualifier("twoDataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource);
sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
.getResources("classpath:mybatis/mapper-postgres/*.xml"));
return sessionFactoryBean.getObject();
}
@Bean(name = "twoSqlSessionTemplate")
public SqlSessionTemplate sqlSessionFactoryTemplate(@Qualifier("twoSqlSessionFactory")SqlSessionFactory sqlSessionFactory ) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}可能有人不清楚项目的结构，我在下面放了一张类结构图，能更清晰和方便理解。
注意：和之前的项目的主要区别就是 mapper包多了一个，mapper的xml包也多了一个，不同的数据库mapper放到不同的包内就可以了。
以上就是关于“springboot怎么连接两个数据库”这篇文章的内容，相信大家都有了一定的了解，希望小编分享的内容对大家有帮助，若想了解更多相关的知识内容，请关注亿速云行业资讯频道。
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