导读
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。
添加依赖
<!--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>application.properties
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
2种方式创建DataSource
Master配置，使用druid连接池
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;
@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();
}
}Slave配置
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;
@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;
@Configuration
public class MybatisPlusPageConfig {
@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();
}启动类
@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！！！
演示
多个数据源，同时也是支持事务的
到此这篇关于SpirngBoot整合Mybatis Plus多数据源的实现示例的文章就介绍到这了,更多相关SpirngBoot MybatisPlus多数据源内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
