这篇文章主要讲解了“SpringBoot整合Mybatis Plus多数据源的实现方法是什么”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“SpringBoot整合Mybatis Plus多数据源的实现方法是什么”吧!
有一个这样子的需求,线上正在跑的业务,由于业务发展需要,需重新开发一套新系统,等新系统开发完成后,需要无缝对接切换,当初具体设计见草图。
<!--lombok--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.16</version> <!--scope=provided,说明它是在编译阶段生效,不需要打入包中,Lombok在编译期将带Lombok注解的Java文件正确编译为完整的Class文件--> <scope>provided</scope> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!--mybatis plus和spring boot整合--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.0</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency>
server.port=9999 spring.datasource.master.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.master.url=jdbc:mysql://127.0.0.1/test?useUnicode=true&characterEncoding=utf-8&useSSL=false spring.datasource.master.username=root spring.datasource.master.password=root spring.datasource.slave.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.slave.jdbc-url=jdbc:mysql://127.0.0.1/test2?useUnicode=true&characterEncoding=utf-8&useSSL=false spring.datasource.slave.username=root spring.datasource.slave.password=root
import com.alibaba.druid.pool.DruidDataSource; import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.core.env.Environment; import javax.sql.DataSource; /** * @Author:chenyanbin */ @Configuration @MapperScan(basePackages = "com.example.demo.mapper", sqlSessionFactoryRef = "masterSqlSessionFactory") public class MasterDataSourceConfig { @Autowired private Environment env; @Primary @Bean(name = "masterDataSource") // @ConfigurationProperties("spring.datasource.master") public DataSource masterDataSource() { // return DataSourceBuilder.create().build(); DruidDataSource dataSource = new DruidDataSource(); dataSource.setUrl(env.getProperty("spring.datasource.master.url")); dataSource.setUsername(env.getProperty("spring.datasource.master.username")); dataSource.setPassword(env.getProperty("spring.datasource.master.password")); dataSource.setDriverClassName(env.getProperty("spring.datasource.master.driver-class-name")); //配置初始化大小、最小、最大 dataSource.setMinIdle(10); //配置初始化大小、最小、最大 dataSource.setMaxActive(200); //配置初始化大小、最小、最大 dataSource.setInitialSize(10); //配置获取连接等待超时的时间 dataSource.setMaxWait(60000); //配置一个连接在池中最小生存的时间,单位是毫秒 dataSource.setMinEvictableIdleTimeMillis(300000); //配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 dataSource.setTimeBetweenEvictionRunsMillis(60000); //默认的testWhileIdle=true,testOnBorrow=false,testOnReturn=false dataSource.setValidationQuery("SELECT 1"); //申请连接时执行validationQuery检测连接是否有效 dataSource.setTestOnBorrow(false); //建议配置为true,不影响性能,并且保证安全性。 dataSource.setTestWhileIdle(true); //是否缓存preparedStatement,也就是PSCache dataSource.setPoolPreparedStatements(false); return dataSource; } @Bean(name = "masterSqlSessionFactory") public SqlSessionFactory sqlSessionFactory(@Qualifier("masterDataSource") DataSource dataSource) throws Exception { MybatisSqlSessionFactoryBean sessionFactoryBean = new MybatisSqlSessionFactoryBean(); sessionFactoryBean.setDataSource(dataSource); return sessionFactoryBean.getObject(); } }
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean; import org.apache.ibatis.session.SqlSessionFactory; 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 javax.sql.DataSource; /** * @Author:chenyanbin */ @Configuration @MapperScan(basePackages = "com.example.demo.mapper2",sqlSessionFactoryRef = "slaveSqlSessionFactory") public class SlaveDataSourceConfig { @Bean(name = "slaveDataSource") @ConfigurationProperties("spring.datasource.slave") public DataSource slaveDataSource(){ return DataSourceBuilder.create().build(); } @Bean(name = "slaveSqlSessionFactory") public SqlSessionFactory sqlSessionFactory(@Qualifier("slaveDataSource") DataSource dataSource) throws Exception { MybatisSqlSessionFactoryBean sessionFactoryBean = new MybatisSqlSessionFactoryBean(); sessionFactoryBean.setDataSource(dataSource); return sessionFactoryBean.getObject(); } }
注意
master和slave扫描不同的mapper包路径!!!!!!
如果需要指定.xml文件,需这样配置!!!
@Bean(name = "masterSqlSessionFactory") public SqlSessionFactory sqlSessionFactory(@Qualifier("masterDataSource") DataSource dataSource) throws Exception { MybatisSqlSessionFactoryBean sessionFactoryBean = new MybatisSqlSessionFactoryBean(); sessionFactoryBean.setDataSource(dataSource); sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources("classpath:mapper/**/*.xml")); return sessionFactoryBean.getObject(); }
MybatisPlus分页插件设置
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor; import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; /** * MybatisPlus分页配置 * * @Author:chenyanbin */ @Configuration public class MybatisPlusPageConfig { /** * 新版分页插件 * * @return */ @Bean public MybatisPlusInterceptor mybatisPlusInterceptor() { MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor(); mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor()); return mybatisPlusInterceptor; } }
@Bean(name = "masterSqlSessionFactory") public SqlSessionFactory sqlSessionFactory( @Qualifier("masterDataSource") DataSource dataSource, @Qualifier("mybatisPlusInterceptor") MybatisPlusInterceptor mybatisPlusInterceptor ) throws Exception { MybatisSqlSessionFactoryBean sessionFactoryBean = new MybatisSqlSessionFactoryBean(); sessionFactoryBean.setDataSource(dataSource); sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources("classpath:mapper/**/*.xml")); sessionFactoryBean.setPlugins(mybatisPlusInterceptor); return sessionFactoryBean.getObject(); }
@SpringBootApplication( exclude = {DataSourceAutoConfiguration.class, MybatisPlusAutoConfiguration.class} )
启动类上排查,自动装配,使用我们自定义的多数据源!!!
多个数据源,同时也是支持事务的
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