spring boot 多数据源配置

新建一个spring boot项目。然后贴代码

配置文件：application.properties

bootapp.name=SpringBoot
bootapp.description=${bootapp.name}

server.port=8080
spring.profiles.active=dev

server.tomcat.uri-encoding=utf-8
server.servlet.encoding.force=true
server.servlet.encoding.charset=UTF-8
server.servlet.encoding.enabled=true

spring.datasource.primary.jdbc-url=jdbc:mysql://127.0.0.1:3306/db2?characterEncoding=utf-8&serverTimezone=GMT%2B8
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.primary.username=root
spring.datasource.primary.password=123456

spring.datasource.datasource2.jdbc-url=jdbc:mysql://127.0.0.1:3306/db3?characterEncoding=utf-8&serverTimezone=GMT%2B8
spring.datasource.datasource2.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.datasource2.username=root
spring.datasource.datasource2.password=123456

spring.datasource.datasource3.jdbc-url=jdbc:kingbase8://10.10.5.189:54321/test?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf-8
spring.datasource.datasource3.driver-class-name=com.kingbase8.Driver
spring.datasource.datasource3.username=KCDB
spring.datasource.datasource3.password=1kc@QAZ

# mybatis
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.wdbyte.domain

目录结构：

PrimaryDataSourceConfig类

package com.wdbyte.config;

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.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
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;

/**
 * 主数据源配置
 *

 */
@Configuration
@MapperScan(basePackages = {"com.wdbyte.mapper.primary"}, sqlSessionFactoryRef = "sqlSessionFactory")
public class PrimaryDataSourceConfig {

    @Bean(name = "dataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    @Primary
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "sqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("dataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return bean.getObject();
    }

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

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

SecondData2SourceConfig类：

package com.wdbyte.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.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
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;

/**
 * @author guoshuai
 * @date 2022年01月05日 17:37
 */
@Configuration
@MapperScan(basePackages = {"com.wdbyte.mapper.datasource3"}, sqlSessionFactoryRef = "sqlSessionFactory3")
public class SecondData2SourceConfig {
    @Bean(name = "dataSource3")
    @ConfigurationProperties(prefix = "spring.datasource.datasource3")
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "sqlSessionFactory3")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("dataSource3") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "transactionManager3")
    public DataSourceTransactionManager transactionManager(@Qualifier("dataSource3") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "sqlSessionTemplate3")
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("sqlSessionFactory3") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

SecondDataSourceConfig类：

package com.wdbyte.config;

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.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

/**
 * 第二个数据源配置
 *
 * @author
 * @website: https://www.wdbyte.com
 * @date 2020/12/19
 */
@Configuration
@MapperScan(basePackages = {"com.wdbyte.mapper.datasource2"}, sqlSessionFactoryRef = "sqlSessionFactory2")
public class SecondDataSourceConfig {

    @Bean(name = "dataSource2")
    @ConfigurationProperties(prefix = "spring.datasource.datasource2")
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "sqlSessionFactory2")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("dataSource2") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "transactionManager2")
    public DataSourceTransactionManager transactionManager(@Qualifier("dataSource2") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "sqlSessionTemplate2")
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("sqlSessionFactory2") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

其他的看gitee吧  懒得复制了

https://gitee.com/work123gs/springboot-data-mybatis-multiple-datasource.git