tk-mybatis整合springBoot使用两个数据源的方法
目录
- 一、配置连接信息
- 二、配置DataSource数据源
- 三、Application配置
- 四、Mapper代码结构
- 补充:
根据项目功能需求,需要与第三方公共库对接,需要对公共库进行相关操作,由于不想使用原生jdbc,所以采用mybaits进行多数据配置。
单纯的使用mybaits进行多数据配置网上资料很多,但由于前期为了方便开发,采用了tk-mybaits。关于tk-mybaits多数据源配置没有相关材料,官方也没有提供相关功能说明,所以最终采用mybatis+tk-mybaits分别使用的策略进行多数据源配置功能实现。具体代码如下
一、配置连接信息
#开发运行环境数据库 spring.datasource.local.url=jdbc:mysql://0.0.0.0:3306/zhdd spring.datasource.local.username=root spring.datasource.local.password= spring.datasource.local.driver-class-name=com.mysql.jdbc.Driver spring.datasource.local.druid.initial-size=1 spring.datasource.local.druid.min-idle=1 spring.datasource.local.druid.max-active=20 spring.datasource.local.druid.test-on-borrow=true spring.datasource.local.druid.stat-view-servlet.allow=true #第三方对接通用数据库 spring.datasource.public.url=jdbc:mysql://0.0.0.0:3306/zhdd spring.datasource.public.username=root spring.datasource.public.password= spring.datasource.public.driver-class-name=com.mysql.jdbc.Driver spring.datasource.public.druid.initial-size=1 spring.datasource.public.druid.min-idle=1 spring.datasource.public.druid.max-active=20 spring.datasource.public.druid.test-on-borrow=true spring.datasource.public.druid.stat-view-servlet.allow=true
二、配置DataSource数据源
注意两个数据源中有一个是为主数据源,需要增加一个@Primary注解,有且只能有一个需要。关于2个以上数据源没有额外再进行研究了,不过利用mybatis再额外配置多个数据源应该可以实现
1.数据源1配置
package com.hiynn.core.mybatis; import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.springframework.beans.factory.annotation.Qualifier; 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 org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource; /** * 开发运行环境数据库 */ @Configuration public class LocalDataSourceConfig { @Bean(name = "localDataSource") @ConfigurationProperties(prefix = "spring.datasource.local") @Primary public DataSource localDataSource() { return DruidDataSourceBuilder.create().build(); } @Bean(name = "localTransactionManager") @Primary public DataSourceTransactionManager mysqlTransactionManager() { return new DataSourceTransactionManager(localDataSource()); } @Bean(name = "localSqlSessionFactory") @Primary public SqlSessionFactory mysqlSqlSessionFactory(@Qualifier("localDataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean(); sessionFactory.setDataSource(dataSource); //如果不使用xml的方式配置mapper,则可以省去下面这行mapper location的配置。 sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources("classpath*:mapper/*.xml")); return sessionFactory.getObject(); } }
2.数据源2配置
package com.hiynn.core.mybatis; import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.context.properties.ConfigurationProperties; 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; /** * 公共通用数据库 */ @Configuration public class PublicDataSourceConfig { @Bean(name = "publicDataSource") @ConfigurationProperties(prefix = "spring.datasource.public") public DataSource publicDataSource() { return DruidDataSourceBuilder.create().build(); } @Bean(name = "publicTransactionManager") public DataSourceTransactionManager mysqlTransactionManager() { return new DataSourceTransactionManager(publicDataSource()); } @Bean(name = "publicSqlSessionFactory") public SqlSessionFactory mysqlSqlSessionFactory(@Qualifier("publicDataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean(); sessionFactory.setDataSource(dataSource); //如果不使用xml的方式配置mapper,则可以省去下面这行mapper location的配置。 sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources("classpath*:mapper2/*.xml")); return sessionFactory.getObject(); } }
三、Application配置
package com.hiynn.core; //特别注意,下面的是 tk.MapperScan import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.boot.web.servlet.support.SpringBootServletInitializer; import org.springframework.transaction.annotation.EnableTransactionManagement; import springfox.documentation.swagger2.annotations.EnableSwagger2; import tk.mybatis.spring.annotation.MapperScan; /** * @author zz * @date 2018-7-2 */ @ServletComponentScan @SpringBootApplication @EnableTransactionManagement @EnableSwagger2 @MapperScan(basePackages = "com.hiynn.core.**.mapper",sqlSessionFactoryRef = "localSqlSessionFactory") @org.mybatis.spring.annotation.MapperScan(basePackages = "com.hiynn.core.**.mapper2",sqlSessionFactoryRef = "publicSqlSessionFactory") public class Application extends SpringBootServletInitializer{ public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
四、Mapper代码结构
补充:
一、解决mybatis数据库驼峰命名自动映射问题以及sql语句打印问题,通过读取配置文件实现。两个数据源都需要设置
@Bean(name = "localSqlSessionFactory") @Primary public SqlSessionFactory mysqlSqlSessionFactory(@Qualifier("localDataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean(); sessionFactory.setDataSource(dataSource); //添加mybatis配置文件读取功能更 sessionFactory.setConfigLocation(new PathMatchingResourcePatternResolver().getResource("mybatis-config.xml")); //如果不使用xml的方式配置mapper,则可以省去下面这行mapper location的配置。 sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources("classpath*:mapper/*.xml")); return sessionFactory.getObject(); }
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <settings> <setting name="mapUnderscoreToCamelCase" value="true" /> <!-- 打印查询语句 --> <setting name="logImpl" value="STDOUT_LOGGING" /> </settings> </configuration>
二、配置PageHelper分页插件,在application.properties统一配置
数据库方言 指定分页插件使用哪种数据库方言 pagehelper.helperDialect=mysql #分页参数合理化 pageNum<=0 时会查询第一页, pageNum>pages(超过总数时),会查询最后一页 pagehelper.reasonable=true pagehelper.supportMethodsArguments=true pagehelper.params=count=countSql
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