Springboot中怎么连接多数据源
今天就跟大家聊聊有关Spring boot 中怎么连接多数据源，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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1.application.yml中添加两个datasource
server: port: 8080 spring: application: name: king datasource: master: type: com.zaxxer.hikari.HikariDataSource jdbc-url: jdbc:MySQL://localhost:3306/king?useUnicode=yes&characterEncoding=UTF-8&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver username: root password: 123456 idle-timeout: 10000 minimum-idle: 1 maximum-pool-size: 10 pool-name: master auto-commit: false connection-test-query: SELECT 1 slave: type: com.zaxxer.hikari.HikariDataSource jdbc-url: jdbc:mysql://localhost:3306/king?useUnicode=yes&characterEncoding=UTF-8&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver username: root password: 123456 idle-timeout: 10000 minimum-idle: 1 maximum-pool-size: 10 pool-name: slave auto-commit: false connection-test-query: SELECT 1
2.手动初始化数据源masterDataSource
package cn.bj.king.config;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
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.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 org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
/**
* @author ARongking
* @date 2019-03-28
*/
@Configuration
@EnableTransactionManagement
@MapperScan(basePackages = {"cn.bj.king.mapper.master"},
sqlSessionFactoryRef = "masterSqlSessionFactory")
public class WriteDataSourceConfig {
@Bean(name = "masterDataSource")
@Primary
@Qualifier("masterDataSource")
public DataSource masterDataSource(@Qualifier("masterHikariConfig")HikariConfig hikariConfig) {
System.out.println("实例化主库");
HikariDataSource hikariDataSource=new HikariDataSource(hikariConfig);
return hikariDataSource;
}
/**
* 配置连接池信息
* @return
*/
@ConfigurationProperties(prefix = "spring.datasource.master")
@Bean("masterHikariConfig")
public HikariConfig masterHikariConfig(){
HikariConfig hikariConfig=new HikariConfig();
return hikariConfig;
}
/**
* SqlSessionFactory配置
*
* @return
* @throws Exception
*/
@Bean(name = "masterSqlSessionFactory")
@Primary
public SqlSessionFactory masterSqlSessionFactory(@Qualifier("masterDataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
// 配置mapper文件位置
sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:mapper/master/*.xml"));
sqlSessionFactoryBean.setTypeAliasesPackage("cn.bj.king.entity");
return sqlSessionFactoryBean.getObject();
}
/**
* 配置事物管理器
*
* @return
*/
@Bean(name = "masterTransactionManager")
@Primary
public DataSourceTransactionManager masterTransactionManager(@Qualifier("masterDataSource") DataSource dataSource) {
DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
dataSourceTransactionManager.setDataSource(dataSource);
return dataSourceTransactionManager;
}
}3.手动初始化数据源ReadDataSource
package cn.bj.king.config;
import com.github.pagehelper.PageInterceptor;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
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.core.env.Environment;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
import java.util.Properties;
@Configuration
@EnableTransactionManagement
@MapperScan(basePackages = {"cn.bj.king.mapper.slave"},
sqlSessionFactoryRef = "slaveSqlSessionFactory")
public class ReadDataSourceConfig {
@Autowired
Environment environment;
@Bean(name = "slaveDataSource")
@Qualifier("slaveDataSource")
public DataSource slaveDataSource(@Qualifier("slaveHikariConfig")HikariConfig hikariConfig) {
System.out.println("实例化从库");
HikariDataSource hikariDataSource=new HikariDataSource(hikariConfig);
return hikariDataSource;
}
/**
* 配置连接池信息
* @return
*/
@ConfigurationProperties(prefix = "spring.datasource.slave")
@Bean("slaveHikariConfig")
public HikariConfig slaveHikariConfig(){
HikariConfig hikariConfig=new HikariConfig();
return hikariConfig;
}
/**
* SqlSessionFactory配置
*
* @return
* @throws Exception
*/
@Bean(name = "slaveSqlSessionFactory")
public SqlSessionFactory slaveSqlSessionFactory(@Qualifier("slaveDataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
// 配置mapper文件位置
sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:mapper/slave/*.xml"));
sqlSessionFactoryBean.setTypeAliasesPackage("cn.bj.king.entity");
return sqlSessionFactoryBean.getObject();
}
/**
* 配置事物管理器
*
* @return
*/
@Bean(name = "slaveTransactionManager")
public DataSourceTransactionManager slaveTransactionManager(@Qualifier("slaveDataSource") DataSource dataSource) {
DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
dataSourceTransactionManager.setDataSource(dataSource);
return dataSourceTransactionManager;
}
}4.测试启动是否正常初始化master和slave 两个数据源
5.这里需要注意几个地方：
配置数据库连接池的时候，如果不是手动设置HikariConfig ，即通过Environment 去一个个获取数据库连接池在yml中的配置的话，数据库连接池的（idle-timeout，minimum-idle， maximum-pool-size，pool-name，auto-commit，connection-test-query）等，一定要与slave节点平级，不然 HikariConfig 是读取不到这些信息的。
如果手动赋值HikariConfig 的话，那就没有什么限制了，写到哪里都行，只需要用Environment 去读取配置文件的值，手动设置到HikariConfig 就行了。
看完上述内容，你们对Spring boot 中怎么连接多数据源有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
文章名称：Springboot中怎么连接多数据源
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