多数据源配置

【创建包：datasource,配置2个数据源（DataSource01主数据源）】

package com.java.test1.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;

import javax.sql.DataSource;

@Configuration  //注解到springboot容器中
@MapperScan(basePackages = "com.java.test1.test1.mapper",sqlSessionFactoryRef = "test1SqlSessionFactory")
public class DataSource01 {
    /**
     * 返回test1数据库的数据源
     */
    @Bean(name = "test1DataSource")
    @Primary//主数据源，一个应用只能有一个主数据源
    @ConfigurationProperties(prefix = "spring.datasource.test1")
    public DataSource dataSource(){
        return DataSourceBuilder.create().build();
    }

    /**
     * 返回test1数据库的会话工厂
     */
    @Bean(name = "test1SqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("test1DataSource") DataSource ds) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(ds);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/test1/*.xml"));
        return bean.getObject();
    }

    /**
     * 返回test1数据库的事务
     */
    @Bean(name = "test1TransactionManager")
    @Primary //主事务
    public DataSourceTransactionManager transactionManager(@Qualifier("test1DataSource") DataSource dataSource){
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 返回test1数据库的会话模板
     */
    @Bean(name = "test1SqlSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(
            @Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory){

        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

　　

package com.java.test1.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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration  //注解到springboot容器中
@MapperScan(basePackages = "com.java.test1.test2.mapper",sqlSessionFactoryRef = "test2SqlSessionFactory")
public class DataSource02 {
    /**
     * 返回test2数据库的数据源
     */
    @Bean(name = "test2DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.test2")
    public DataSource dataSource(){
        return DataSourceBuilder.create().build();
    }

    /**
     * 返回test2数据库的会话工厂
     */
    @Bean(name = "test2SqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("test2DataSource") DataSource ds) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(ds);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/test2/*.xml"));
        return bean.getObject();
    }

    /**
     * 返回test2数据库的事务
     */
    @Bean(name = "test2TransactionManager")
    public DataSourceTransactionManager transactionManager(@Qualifier("test2DataSource") DataSource dataSource){
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 返回test2数据库的会话模板
     */
    @Bean(name = "test2SqlSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(
            @Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory){

        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

　　

【配置文件】

#tomcat端口号
server.port=8080
#spring.datasource.url=jdbc:mysql://localhost:3306/study2020
#spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#spring.datasource.username=root
#spring.datasource.password=root
#数据库配置
spring.datasource.test1.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.test1.jdbc-url=jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf-8
spring.datasource.test1.username=root
spring.datasource.test1.password=root

spring.datasource.test2.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.test2.jdbc-url=jdbc:mysql://localhost:3306/test2?useUnicode=true&characterEncoding=utf-8
spring.datasource.test2.username=root
spring.datasource.test2.password=root
mybatis.configuration.map-underscore-to-camel-case=true
#mybatis 配置
# 配置映射文件加载，使用自定义数据源时此配置无效
#mybatis.mapper-locations=classpath*:mappers/*.xml
spring.resources.static-locations:classpath:/static/,classpath:/templates/

 

 

注：配置多数据源后，在application文件使用mybatis下划线转驼峰配置失效时，使用如下方法解决

#开启驼峰命名转换
mybatis.configuration.map-underscore-to-camel-case=true

 

 

将application.properties  mybatis的congfig加载到类中，再注入到SqlSessionFactoryBean中，问题解决