maven依赖
spring-boot-starter-web
mybatis-spring-boot-starter
mysql-connector-java
lombok
application.yml
server:
port: 8080 # 启动端口
spring:
datasource:
db1: # 数据源1
jdbc-url: jdbc:mysql://localhost:3306/db1?characterEncoding=utf8&useUnicode=true&useSSL=false&serverTimezone=GMT%2B8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
db2: # 数据源2
jdbc-url: jdbc:mysql://localhost:3306/db2?characterEncoding=utf8&useUnicode=true&useSSL=false&serverTimezone=GMT%2B8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
主数据源配置
@Configuration
@MapperScan(basePackages = "com.example.multipledatasource.mapper.db1", sqlSessionFactoryRef = "db1SqlSessionFactory")
public class DataSourceConfig1 {
@Primary // 表示这个数据源是默认数据源, 这个注解必须要加,因为不加的话spring将分不清楚那个为主数据源(默认数据源)
@Bean("db1DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db1") //读取application.yml中的配置参数映射成为一个对象
public DataSource getDb1DataSource(){
return DataSourceBuilder.create().build();
}
@Primary
@Bean("db1SqlSessionFactory")
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
// mapper的xml形式文件位置必须要配置,不然将报错:no statement (这种错误也可能是mapper的xml中,namespace与项目的路径不一致导致)
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/db1/*.xml"));
return bean.getObject();
}
@Primary
@Bean("db1SqlSessionTemplate")
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
副数据源配置
@Configuration
@MapperScan(basePackages = "com.example.multipledatasource.mapper.db2", sqlSessionFactoryRef = "db2SqlSessionFactory")
public class DataSourceConfig2 {
@Bean("db2DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db2")
public DataSource getDb1DataSource(){
return DataSourceBuilder.create().build();
}
@Bean("db2SqlSessionFactory")
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/db2/*.xml"));
return bean.getObject();
}
@Bean("db2SqlSessionTemplate")
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
在对应的mapper和xml目录写代码,并正常注入即可使用
Original: https://www.cnblogs.com/zxporz/p/16743007.html
Author: 乂墨EMO
Title: springboot+mybatis 双数据源配置
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