spring boot 项目多数据源的创建

spring boot 项目多数据源的创建：

第一步：搭建 spring boot 工程，在这里使用的是 idea 这个软件，

首先：搭建一个 waven 工程

其次：创建完 maven 工程之后，需要将其转换为 spring boot 工程，在 pom.xml 文件中引入对应的 springboot 工程的包，

我这里的是 MAVEN 的聚合工程，大家只需关心 springboot 所需要的包即可。

最后：创建 springboot 的启动类

第二步：由于业务需求需要三个数据源

需要配置三个数据源的配置类，

HisDsConfig，PeisSqlConfig，RisDsConfig

这三个配置类，都精确到 mapper 目录，以便跟其他数据源隔离

HisDsConfig：

package com.jfsoft.conf;

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.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 = HisDsConfig.PACKAGE, sqlSessionFactoryRef = "hisSqlSessionFactory")
public class HisDsConfig {

    static final String PACKAGE = "com.jfsoft.dao.view.his";
    static final String MAPPER_LOCATION = "com.jfsoft.dao.view.his.*.xml";

    @Value("${spring.datasource.his.url}")
    private String url;

    @Value("${spring.datasource.his.username}")
    private String user;

    @Value("${spring.datasource.his.password}")
    private String password;

    @Value("${spring.datasource.his.driver-class-name}")
    private String driverClass;

    @Bean(name = "hisDataSource")
    @Qualifier
    public DataSource hisDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean(name = "hisTransactionManager")
    @Qualifier
    public DataSourceTransactionManager hisTransactionManager() {
        return new DataSourceTransactionManager(hisDataSource());
    }

    @Bean(name = "hisSqlSessionFactory")
    @Qualifier
    public SqlSessionFactory hisSqlSessionFactory(@Qualifier("hisDataSource") DataSource hisDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(hisDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(HisDsConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}

PeisSqlConfig：

package com.jfsoft.conf;

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.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 = PeisSqlConfig.PACKAGE, sqlSessionFactoryRef = "peisSqlSessionFactory")
public class PeisSqlConfig {

    static final String PACKAGE = "com.jfsoft.dao.view.peis";

    static final String MAPPER_LOCATION = "com.jfsoft.dao.view.peis.*.xml";

    @Value("${spring.datasource.peis.url}")
    private String url;

    @Value("${spring.datasource.peis.username}")
    private String user;

    @Value("${spring.datasource.peis.password}")
    private String password;

    @Value("${spring.datasource.peis.driver-class-name}")
    private String driverClass;

    @Bean(name = "peisDataSource")
    @Qualifier
    public DataSource peisDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean(name = "peisTransactionManager")
    @Qualifier
    public DataSourceTransactionManager peisTransactionManager() {
        return new DataSourceTransactionManager(peisDataSource());
    }

    @Bean(name = "peisSqlSessionFactory")
    @Qualifier
    public SqlSessionFactory peisSqlSessionFactory(@Qualifier("peisDataSource") DataSource peisDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(peisDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(PeisSqlConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}

RisDsConfig：

package com.jfsoft.conf;

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.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 = HisDsConfig.PACKAGE, sqlSessionFactoryRef = "hisSqlSessionFactory")
public class HisDsConfig {

    static final String PACKAGE = "com.jfsoft.dao.view.his";
    static final String MAPPER_LOCATION = "com.jfsoft.dao.view.his.*.xml";

    @Value("${spring.datasource.his.url}")
    private String url;

    @Value("${spring.datasource.his.username}")
    private String user;

    @Value("${spring.datasource.his.password}")
    private String password;

    @Value("${spring.datasource.his.driver-class-name}")
    private String driverClass;

    @Bean(name = "hisDataSource")
    @Qualifier
    public DataSource hisDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driverClass);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean(name = "hisTransactionManager")
    @Qualifier
    public DataSourceTransactionManager hisTransactionManager() {
        return new DataSourceTransactionManager(hisDataSource());
    }

    @Bean(name = "hisSqlSessionFactory")
    @Qualifier
    public SqlSessionFactory hisSqlSessionFactory(@Qualifier("hisDataSource") DataSource hisDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(hisDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(HisDsConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}

在 application.yml 配置文件中配置三个数据源

spring:
  datasource:
    ris:
      url: jdbc:oracle:thin:@10.0.2.200:1521:orcl
      driver-class-name: oracle.jdbc.driver.OracleDriver
      username: ris
      password: 123456
    peis:
      url: jdbc:sqlserver://localhost:1433;DatabaseName=xxxxx
      driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver
      username: ris
      password: 123456
    his:
      url: jdbc:oracle:thin:@10.0.2.70:1521:orcl
      driver-class-name: oracle.jdbc.driver.OracleDriver
      username: ris
      password: 123456

第三步：测试结果

将 his 数据源中的内容，插入到 ris 数据库中。测试成功！