SpringBoot项目配置Mysql多数据源

SpringBoot现在是很多很多公司应用的后端框架，Spring Boot是一个便捷搭建 基于spring工程的脚手架；作用是帮助开发人员快速搭建大型的spring 项目。简化工程的配置，依赖管理；实现开发人员把时间都集中在业务开发上。现在呢我们就来聊一聊使用Spring Boot如何接入并使用多个数据源的问题.这里呢我只写一些主要的DataSource配置类.

这里先准备新建一个干净的SpringBoot项目做一个demo(springboot版本我这里选择的是2.2.2)

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
</parent>

引入主要pom文件如下:

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>

 新建application.yml配置文件,设置数据源信息

• • #ty_bigdata
  • spring.datasource.test1.jdbcUrl = jdbc:mysql://127.0.0.1:3306/test1?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=UTF-8
  • spring.datasource.test1.username = root
  • spring.datasource.test1.password = root
  • spring.datasource.test1.driverClassName = com.mysql.jdbc.Driver
  • #test2数据库的配置
  • spring.datasource.test2.jdbcUrl = jdbc:mysql://127.0.0.1:3306/test2?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=UTF-8
  • spring.datasource.test2.username = root
  • spring.datasource.test2.password = root
  • spring.datasource.test2.driverClassName = com.mysql.jdbc.Driver

在项目目录下新建config包,用于放数据源配置类:

在config包下新建DataSource1Config类:

• • 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.jdbc.datasource.DataSourceTransactionManager;

• • import javax.sql.DataSource;

• • @Configuration
  • @MapperScan(basePackages = "cn.vernall.mapper.test1", sqlSessionFactoryRef = "test1SqlSessionFactory")
  • public class DataSource1Config {
  • @Bean(name = "test1DataSource")
  • @ConfigurationProperties(prefix = "spring.datasource.test1")
  • @Primary
  • public DataSource testDataSource() {
  • return DataSourceBuilder.create().build();
  • }

• • @Bean(name = "test1SqlSessionFactory")
  • @Primary
  • public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {
  • SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
  • bean.setDataSource(dataSource);
  • return bean.getObject();
  • }

• • @Bean(name = "test1TransactionManager")
  • @Primary
  • public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
  • return new DataSourceTransactionManager(dataSource);
  • }

• • @Bean(name = "test1SqlSessionTemplate")
  • @Primary
  • public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
  • return new SqlSessionTemplate(sqlSessionFactory);
  • }

}
其中@primary注解是用来表示当前数据源为默认数据源,没有特别指定的情况下项目使用的数据源为被该注解修饰的数据源,@primary必需要有并且只能修饰一个数据源,不然会有异常.

在config包下新建DataSource2Config类

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.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration

@MapperScan(basePackages = "cn.vernall.mapper.test2", sqlSessionFactoryRef = "test2SqlSessionFactory")

public class DataSource2Config {

@Bean(name = "test2DataSource")

@ConfigurationProperties(prefix = "spring.datasource.test2")

public DataSource testDataSource() {

return DataSourceBuilder.create().build();

}

@Bean(name = "test2SqlSessionFactory")

@Primary

public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource) throws Exception {

SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

bean.setDataSource(dataSource);

return bean.getObject();

}

@Bean(name = "test2TransactionManager")

@Primary

public DataSourceTransactionManager testTransactionManager(@Qualifier("test2DataSource") DataSource dataSource) {

return new DataSourceTransactionManager(dataSource);

}

@Bean(name = "test2SqlSessionTemplate")

@Primary

public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {

return new SqlSessionTemplate(sqlSessionFactory);

}

}
springboot项目整合数据源到此结束,欢迎各位大神补充修改