这块是比较基础的配置，阿里数据库配置还是比较好用的，并且可以用来监控数据源的情况。废话不多说，下面看代码。

基于maven项目，在pom.xml中添加引用：

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>druid</artifactId>

            <version>1.0.11</version>

        </dependency>

配置文件如下：

server.port=9090

logging.level.tk.mybatis=TRACE

druid1.type=com.alibaba.druid.pool.DruidDataSource

druid1.url=jdbc:mysql://192.168.0.190:3306/bestPractices

druid1.driver-class=com.mysql.jdbc.Driver

druid1.username=root

druid1.password=youeDATA2016_

druid1.initial-size=1

druid1.min-idle=1

druid1.max-active=20

druid1.test-on-borrow=true

druid1.filters=stat,wall,log4j

druid1.poolPreparedStatements=true

druid1.datasource.maxPoolPreparedStatementPerConnectionSize=20

druid1.datasource.logAbandoned=true 

druid2.type=com.alibaba.druid.pool.DruidDataSource

druid2.url=jdbc:mysql://192.168.0.190:3306/bestPracticesTwo

druid2.driver-class=com.mysql.jdbc.Driver

druid2.username=root

druid2.password=youeDATA2016_

druid2.initial-size=1

druid2.min-idle=1

druid2.max-active=20

druid2.test-on-borrow=true

druid2.filters=stat,wall,log4j

druid2.poolPreparedStatements=true

druid2.datasource.maxPoolPreparedStatementPerConnectionSize=20

druid2.datasource.logAbandoned=true

spring.mvc.view.prefix=/WEB-INF/jsp/

spring.mvc.view.suffix=.jsp

mybatis.type-aliases-package=bp.model

mybatis.mapper-locations=classpath:mybatis/mybatis-config.xml

mapper.mappers=bp.util.MyMapper

#mapper.not-empty=false

#mapper.identity=MYSQL

pagehelper.helperDialect=mysql

pagehelper.reasonable=true

pagehelper.supportMethodsArguments=true

pagehelper.dialect=com.github.pagehelper.dialect.helper.MySqlDialect

pagehelper.params=count=countSql

pagehelper.autoDialect=true

pagehelper.closeConn=false

pagehelper.offsetAsPageNum=true

spring.http.encoding.force=true

spring.redis.database= 0

spring.redis.host= 192.168.237.128

spring.redis.port= 6379

spring.redis.pool.max-active= 8

spring.redis.pool.max-idle= 8

spring.redis.pool.max-wait=-1

spring.redis.pool.min-idle=0

spring.redis.timeout= 1500

配置文件：数据源1

package bp.config;

import java.sql.SQLException;

import javax.sql.DataSource;

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.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.boot.autoconfigure.AutoConfigureBefore;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;

import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;

import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

import org.springframework.boot.context.properties.EnableConfigurationProperties;

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.core.io.support.ResourcePatternResolver;

import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import com.alibaba.druid.pool.DruidDataSource;

/**

 * 数据源1

 */

@Configuration

@EnableConfigurationProperties(DruidProperties1.class)

@AutoConfigureBefore(DataSourceAutoConfiguration.class)

@ConditionalOnClass(DruidDataSource.class)

@MapperScan(basePackages = "bp.mapper.mapper1", sqlSessionTemplateRef  = "SqlSessionTemplate1")

public class DataSource1Config {

    @Autowired

    private DruidProperties1 properties;

    @Bean(name = "DataSource1")

    @ConditionalOnProperty(prefix = "druid1", name = "url")

    @Primary

    public DataSource dataSource() throws SQLException {

        DruidDataSource dataSource = new DruidDataSource();

        dataSource.setUrl(properties.getUrl());

        dataSource.setUsername(properties.getUsername());

        dataSource.setPassword(properties.getPassword());

        dataSource.setFilters(properties.getFilters());

        if (properties.getInitialSize() > 0) {

            dataSource.setInitialSize(properties.getInitialSize());

        }

        if (properties.getMinIdle() > 0) {

            dataSource.setMinIdle(properties.getMinIdle());

        }

        if (properties.getMaxActive() > 0) {

            dataSource.setMaxActive(properties.getMaxActive());

        }

        dataSource.setTestOnBorrow(properties.isTestOnBorrow());

        try {

            dataSource.init();

        } catch (SQLException e) {

            throw new RuntimeException(e);

        }

        return dataSource;

    }

    @Bean(name = "SqlSessionFactory1")

    @Primary

    public SqlSessionFactory test1SqlSessionFactory(@Qualifier("DataSource1") DataSource dataSource) throws Exception {

        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        bean.setDataSource(dataSource);

        bean.setConfigLocation(resolver.getResource("classpath:mybatis/mybatis-config.xml"));

        bean.setMapperLocations(resolver.getResources("bp/mapper/mapper1/*.xml"));

        return bean.getObject();

    }

    @Bean(name = "TransactionManager1")

    @Primary

    public DataSourceTransactionManager test1TransactionManager(@Qualifier("DataSource1") DataSource dataSource) {

        return new DataSourceTransactionManager(dataSource);

    }

    @Bean(name = "SqlSessionTemplate1")

    @Primary

    public SqlSessionTemplate test1SqlSessionTemplate(@Qualifier("SqlSessionFactory1") SqlSessionFactory sqlSessionFactory) throws Exception {

        return new SqlSessionTemplate(sqlSessionFactory);

    }

}

数据源2：

package bp.config;

import java.sql.SQLException;

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.aop.framework.autoproxy.BeanNameAutoProxyCreator;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.boot.autoconfigure.AutoConfigureBefore;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;

import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;

import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;

import org.springframework.boot.context.properties.ConfigurationProperties;

import org.springframework.boot.context.properties.EnableConfigurationProperties;

import org.springframework.boot.web.servlet.FilterRegistrationBean;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

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.core.io.support.ResourcePatternResolver;

import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import com.alibaba.druid.pool.DruidDataSource;

import com.alibaba.druid.support.http.StatViewServlet;

import com.alibaba.druid.support.http.WebStatFilter;

import com.alibaba.druid.support.spring.stat.DruidStatInterceptor;

import javax.annotation.Resource;

import javax.sql.DataSource;

/**

 * 数据源2

 */

@Configuration

@EnableConfigurationProperties(DruidProperties2.class)

@AutoConfigureBefore(DataSourceAutoConfiguration.class)

@ConditionalOnClass(DruidDataSource.class)

@MapperScan(basePackages = "bp.mapper.mapper2", sqlSessionTemplateRef  = "SqlSessionTemplate2")

public class DataSource2Config {

    @Autowired

    private DruidProperties2 properties;

    @Bean(name = "DataSource2")

    @ConditionalOnProperty(prefix = "druid2", name = "url")

    public DataSource dataSource() throws SQLException {

        DruidDataSource dataSource = new DruidDataSource();

        dataSource.setUrl(properties.getUrl());

        dataSource.setUsername(properties.getUsername());

        dataSource.setPassword(properties.getPassword());

        dataSource.setFilters(properties.getFilters());

        if (properties.getInitialSize() > 0) {

            dataSource.setInitialSize(properties.getInitialSize());

        }

        if (properties.getMinIdle() > 0) {

            dataSource.setMinIdle(properties.getMinIdle());

        }

        if (properties.getMaxActive() > 0) {

            dataSource.setMaxActive(properties.getMaxActive());

        }

        dataSource.setTestOnBorrow(properties.isTestOnBorrow());

        try {

            dataSource.init();

        } catch (SQLException e) {

            throw new RuntimeException(e);

        }

        return dataSource;

    }

    @Bean(name = "SqlSessionFactory2")

    public SqlSessionFactory test2SqlSessionFactory(@Qualifier("DataSource2") DataSource dataSource) throws Exception {

        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        bean.setDataSource(dataSource);

        bean.setConfigLocation(resolver.getResource("classpath:mybatis/mybatis-config.xml"));

        bean.setMapperLocations(resolver.getResources("bp/mapper/mapper2/*.xml"));

        return bean.getObject();

    }

    @Bean(name = "TransactionManager2")

    public DataSourceTransactionManager test2TransactionManager(@Qualifier("DataSource2") DataSource dataSource) {

        return new DataSourceTransactionManager(dataSource);

    }

    @Bean(name = "SqlSessionTemplate2")

    public SqlSessionTemplate test2SqlSessionTemplate(@Qualifier("SqlSessionFactory2") SqlSessionFactory sqlSessionFactory) throws Exception {

        return new SqlSessionTemplate(sqlSessionFactory);

    }

}

启动项目就发现是双数据源了

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