主數據源（由於代碼沒有辦法複製的原因，下面圖片和文字不一致）
package com.xxxx.config; import com.alibaba.druid.pool.DruidDataSource; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.beans.factory.annotation.Value; 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; /** * @program: test * @description: * @author: chenzhian * @create: 2021-10-13 20:31:54 * @version: 1.0 **/ @Configuration // 掃描 Mapper 接口並容器管理 // @MapperScan(basePackages = MasterDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "masterSqlSessionFactory") public class MasterDataSourceConfig { // 精確到 master 目錄，以便跟其他數據源隔離 static final String PACKAGE = "com.xxx.masterdao"; static final String MAPPER_LOCATION = "classpath:mapper/master/*.xml"; @Bean(name = "masterDataSource") @Primary public DataSource masterDataSource() { return new HikariDataSource(); } @Bean(name = "masterTransactionManager") @Primary public DataSourceTransactionManager masterTransactionManager() { return new DataSourceTransactionManager(masterDataSource()); } @Bean(name = "masterSqlSessionFactory") @Primary public SqlSessionFactory masterSqlSessionFactory(@Qualifier("masterDataSource") DataSource masterDataSource) throws Exception { final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean(); sessionFactory.setDataSource(masterDataSource); sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources(MasterDataSourceConfig.MAPPER_LOCATION)); return sessionFactory.getObject(); }
/*
可以另外手動指定目錄
*/
@Bean(name="masterMapperScannerConfigurer")
public MapperScannerConfigurer masterMapperScannerConfigurer(){
MapperScannerConfigurer configurer = new MapperScannerConfigurer();
configurer.setSqlSessionFactoryBeanName("secondSqlSessionFactory");
configurer.setBasePackage(PACKAGE);
return configurer;
}
}
第二個數據源（由於代碼沒有辦法複製的原因，下面圖片和文字不一致）
package com.xxxx.config; import com.alibaba.druid.pool.DruidDataSource; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.beans.factory.annotation.Value; 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; /** * @program: test * @description: * @author: chenzhian * @create: 2021-10-13 20:31:54 * @version: 1.0 **/ @Configuration // 掃描 Mapper 接口並容器管理 // @MapperScan(basePackages = secondDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "secondSqlSessionFactory") public class SecondDataSourceConfig { // 精確到 second 目錄，以便跟其他數據源隔離 static final String PACKAGE = "com.xxx.seconddao"; static final String MAPPER_LOCATION = "classpath:mapper/second/*.xml"; @Bean(name = "secondDataSource") @Primary public DataSource secondDataSource() { return new HikariDataSource(); } @Bean(name = "secondTransactionManager") @Primary public DataSourceTransactionManager secondTransactionManager() { return new DataSourceTransactionManager(secondDataSource()); } @Bean(name = "secondSqlSessionFactory") @Primary public SqlSessionFactory secondSqlSessionFactory(@Qualifier("secondDataSource") DataSource secondDataSource) throws Exception { final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean(); sessionFactory.setDataSource(secondDataSource); sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources(secondDataSourceConfig.MAPPER_LOCATION)); return sessionFactory.getObject(); }
/*
可以另外手動指定目錄
*/
@Bean(name="secondMapperScannerConfigurer")
public MapperScannerConfigurer crwalerMapperScannerConfigurer(){
MapperScannerConfigurer configurer = new MapperScannerConfigurer();
configurer.setSqlSessionFactoryBeanName("secondSqlSessionFactory");
configurer.setBasePackage(PACKAGE);
return configurer;
}
}
application.yml的配置
# master 數據源配置 master: datasource: url: jdbc:mysql://localhost:33306/mastertest?serverTimezone=GMT&useUnicode=true&characterEncoding=utf8 driver-class-name: com.mysql.cj.jdbc.Driver username: sa password: sa!@123 type: com.zaxxer.hikari.HikariDataSource minimum-idle: 5 #最小空閒連接數量 maximum-pool-size: 50 #連接池中最大連接數 max-lifetime: 180000 #連接最長生命週期,當連接存活時間達到30分鐘之後會被關閉作退休處理 idle-timeout: 30000 # 連接允許最長空閒時間,如果連接空閒時間超過1分鐘,則會被關閉 connection-timeout: 30000 客戶端創建連接等待超時時間,如果30秒內沒有獲取連接則拋異常,不再繼續等待 # second 數據源配置 second: datasource: url: jdbc:mysql://localhost:33306/sencondtest?serverTimezone=GMT&useUnicode=true&characterEncoding=utf8 username: root password: 1q2w#E4r driver-class-name: com.mysql.cj.jdbc.Driver type: com.zaxxer.hikari.HikariDataSource minimum-idle: 5 #最小空閒連接數量 maximum-pool-size: 50 #連接池中最大連接數 max-lifetime: 180000 #連接最長生命週期,當連接存活時間達到30分鐘之後會被關閉作退休處理 idle-timeout: 30000 # 連接允許最長空閒時間,如果連接空閒時間超過1分鐘,則會被關閉 connection-timeout: 30000 客戶端創建連接等待超時時間,如果30秒內沒有獲取連接則拋異常,不再繼續等待
更多Hikari的配置請看最後的來源
Hikari是SpringBoot2.0以後默認使用的數據庫連接池,如果是老的話可能會使用到Druid 用來做數據庫連接池,下面是對兩個的瞭解介紹
SpringBoot基礎篇(二)連接池hikari和druid
HiKariCP和Druid對比使用整理自測
mybatis 配置 多個數據源 org.apache.ibatis.binding.BindingException Vakud bound statement (not found)
原因是沒有配置@MapperScan ,因爲我這裏是多個目錄，所以也要配置多個，在Application的啓動上面加
@MapperScan(value{"com.xxxx","com.aaaa"})
如果上面有用到MapperScannerConfigurer 就不需要這個了。
The bean 'xxxService' could not be injected as a 'com.xxxxImpl' because it is a JDK dynamic proxy that implements:
com.xxxxService
Action:
Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by setting proxyTargetClass=true on @EnableAsync and/or @EnableCaching.
原因居然是因爲用到是@Resouce 來直接調用ServiceImpl，造成程序加載的時候還沒有Service的Impl實現類，讓程序加載的時候找不到這個類
解決方案
改成調用Service 接口，另外把@Resouce 改成 @Autowired 就可以了。
資料整理來源
SpringBoot和Mybatis配置多數據源連接多個數據庫
數據庫連接池之Hikari源碼解析