[Java知识库]SpringBoot中的双数据源配置

1.引入使用的数据源类型(mysql oracle sqlserver等)依赖 本文配置为oracel和postgresql

        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0.3</version>
        </dependency>
         <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
        </dependency>
        

2.yml中配置数据源

3.数据源的配合

package com.cbd.findig.data.process.config;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
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 javax.sql.DataSource;

/**
 * 多数据源配置
 */
@Configuration
public class DataSourceConfig {

    //主数据源配置 ds1数据源
    @Primary
    @Bean(name = "ds1DataSourceProperties")
    @ConfigurationProperties(prefix = "spring.datasource.ds1")
    public DataSourceProperties ds1DataSourceProperties() {
        return new DataSourceProperties();
    }

    //主数据源 ds1数据源
    @Primary
    @Bean(name = "ds1DataSource")
    public DataSource ds1DataSource(@Qualifier("ds1DataSourceProperties") DataSourceProperties dataSourceProperties) {
        return dataSourceProperties.initializeDataSourceBuilder().build();
    }

    //第二个ds2数据源配置
    @Bean(name = "ds2DataSourceProperties")
    @ConfigurationProperties(prefix = "spring.datasource.ds2")
    public DataSourceProperties ds2DataSourceProperties() {
        return new DataSourceProperties();
    }

    //第二个ds2数据源
    @Bean("ds2DataSource")
    public DataSource ds2DataSource(@Qualifier("ds2DataSourceProperties") DataSourceProperties dataSourceProperties) {
        return dataSourceProperties.initializeDataSourceBuilder().build();
    }

}

4.JdbcTemplate的配置

package com.cbd.findig.data.process.config;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

/**
 * JdbcTemplate多数据源配置
 * 依赖于数据源配置
 *
 * @see DataSourceConfig
 */
@Configuration
public class JdbcTemplateDataSourceConfig {

    //JdbcTemplate主数据源ds1数据源
    @Primary
    @Bean(name = "ds1JdbcTemplate")
    public JdbcTemplate ds1JdbcTemplate(@Qualifier("ds1DataSource") DataSource dataSource) {
        return new JdbcTemplate(dataSource);
    }

    //JdbcTemplate第二个ds2数据源
    @Bean(name = "ds2JdbcTemplate")
    public JdbcTemplate ds2JdbcTemplate(@Qualifier("ds2DataSource") DataSource dataSource) {
        return new JdbcTemplate(dataSource);
    }
}

5.分别配置两个数据源的使用的包路径（注意换为自己的包路径）

package com.cbd.findig.data.process.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.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;

/**
 * Mybatis主数据源ds1配置
 * 多数据源配置依赖数据源配置
 * @see  DataSourceConfig
 */
@Configuration
@MapperScan(basePackages ="com.cbd.findig.data.process.mapper.**", sqlSessionTemplateRef  = "ds1SqlSessionTemplate")
public class MybatisPlusConfig4ds1 {

    //主数据源 ds1数据源
    @Primary
    @Bean("ds1SqlSessionFactory")
    public SqlSessionFactory ds1SqlSessionFactory(@Qualifier("ds1DataSource") DataSource dataSource) throws Exception {
       SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(dataSource);
        sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().
                        getResources("classpath*:com/cbd/findig/data/process/mapper/**/*.xml"));
        return sqlSessionFactory.getObject();
    }

    @Primary
    @Bean(name = "ds1TransactionManager")
    public DataSourceTransactionManager ds1TransactionManager(@Qualifier("ds1DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Primary
    @Bean(name = "ds1SqlSessionTemplate")
    public SqlSessionTemplate ds1SqlSessionTemplate(@Qualifier("ds1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}

package com.cbd.findig.data.process.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.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;

/**
 * Mybatis  第二个ds2数据源配置
 * 多数据源配置依赖数据源配置
 * @see  DataSourceConfig
 */
@Configuration
@MapperScan(basePackages ="com.cbd.findig.data.process.mapperds2.**", sqlSessionTemplateRef  = "ds2SqlSessionTemplate")
public class MybatisPlusConfig4ds2 {

    //ds2数据源
    @Bean("ds2SqlSessionFactory")
    public SqlSessionFactory ds2SqlSessionFactory(@Qualifier("ds2DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(dataSource);
        sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().
                getResources("classpath*:com/cbd/findig/data/process/mapperds2/**/*.xml"));
        return sqlSessionFactory.getObject();
    }

//事务支持
    @Bean(name = "ds2TransactionManager")
    public DataSourceTransactionManager ds2TransactionManager(@Qualifier("ds2DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "ds2SqlSessionTemplate")
    public SqlSessionTemplate ds2SqlSessionTemplate(@Qualifier("ds2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}