springboot在yml中配置多个数据源

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

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