因项目多个库在不同服务器,一个数据源并不能满足正常需求,下面介绍springboot在yml文件中配置mysql多个数据源
1.首先在yml文件中配置数据源的
2.配置druid
3.配置主节点的数据源
package com.tmao.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.slf4j.Logger;
import org.slf4j.LoggerFactory;
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 = MasterDbConfig.PACKAGE,sqlSessionFactoryRef = "masterSqlSessionFactory")
public class MasterDbConfig {
private Logger logger = LoggerFactory.getLogger(MasterDbConfig.class);
// 精确到 master 目录,以便跟其他数据源隔离
static final String PACKAGE = "com.tmao.dao.master";
private static final String MAPPER_LOCATION = "classpath*:com/tmao/dao/master/*.xml";
private static final String DOMAIN_PACKAGE = "com.tmao.entity.tmall";
@Value("${spring.datasource.url1}")
private String dbUrl;
@Value("${spring.datasource.username1}")
private String username;
@Value("${spring.datasource.password1}")
private String password;
@Value("${spring.datasource.driverClassName}")
private String driverClassName;
@Bean(name="masterDataSource") //声明其为Bean实例
@Primary //在同样的DataSource中,首先使用被标注的DataSource
public DataSource masterDataSource() {
DruidDataSource datasource = new DruidDataSource();
datasource.setUrl(this.dbUrl);
datasource.setUsername(username);
datasource.setPassword(password);
datasource.setDriverClassName(driverClassName);
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(MasterDbConfig.MAPPER_LOCATION));
sessionFactory.setTypeAliasesPackage(DOMAIN_PACKAGE);
//mybatis 数据库字段与实体类属性驼峰映射配置
sessionFactory.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);
return sessionFactory.getObject();
}
}
4.配置子节点
package com.tmao.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.slf4j.Logger;
import org.slf4j.LoggerFactory;
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
@MapperScan(basePackages = ClusterDbConfig.PACKAGE , sqlSessionFactoryRef = "clusterSqlSessionFactory")
public class ClusterDbConfig {
private Logger logger = LoggerFactory.getLogger(ClusterDbConfig.class);
// 精确到 cluster 目录,以便跟其他数据源隔离
static final String PACKAGE = "com.tmao.dao.cluster1";
private static final String MAPPER_LOCATION = "classpath*:com/tmao/dao/cluster1/*.xml";
private static final String DOMAIN_PACKAGE = "com.tmao.entity.os";
@Value("${spring.datasource.url2}")
private String dbUrl;
@Value("${spring.datasource.username2}")
private String username;
@Value("${spring.datasource.password2}")
private String password;
@Value("${spring.datasource.driverClassName}")
private String driverClassName;
@Bean(name="clusterDataSource") //声明其为Bean实例
public DataSource clusterDataSource() {
DruidDataSource datasource = new DruidDataSource();
datasource.setUrl(this.dbUrl);
datasource.setUsername(username);
datasource.setPassword(password);
datasource.setDriverClassName(driverClassName);
return datasource;
}
@Bean(name = "clusterTransactionManager")
public DataSourceTransactionManager clusterTransactionManager() {
return new DataSourceTransactionManager(clusterDataSource());
}
@Bean(name = "clusterSqlSessionFactory")
public SqlSessionFactory clusterSqlSessionFactory(@Qualifier("clusterDataSource") DataSource culsterDataSource)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(culsterDataSource);
sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
.getResources(ClusterDbConfig.MAPPER_LOCATION));
sessionFactory.setTypeAliasesPackage(DOMAIN_PACKAGE);
//mybatis 数据库字段与实体类属性驼峰映射配置
sessionFactory.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);
return sessionFactory.getObject();
}
}
5.注意事项:
主节点和子节点的dao,xml,bean,都应该有单独的包进行分开,防止数据冲突