springBoot多數據源的yml配置+指定數據源

接上一篇

yml配置

druid:
 type: com.alibaba.druid.pool.DruidDataSource
 user:
 url: jdbc:mysql://localhost:3306/user?characterEncoding=UTF-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&useUnicode=true&useSSL=true&verifyServerCertificate=false
 driver-class-name: com.mysql.cj.jdbc.Driver
 username: root
 password:
 initial-size: 5
 min-idle: 1
 max-active: 100
 test-on-borrow: true
 product:
 url: jdbc:mysql://localhost:3306/product?characterEncoding=UTF-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf-8&useSSL=true&verifyServerCertificate=false
 driver-class-name: com.mysql.cj.jdbc.Driver
 username: root
 password:
 initial-size: 5
 min-idle: 1
 max-active: 100
 test-on-borrow: true
logging:
 level:
 com.example.demo.mapper: DEBUG
 org.springframework.web: DEBUG
 java.sql: DEBUG
 org.mybatis.spring: DEBUG

另一種切換數據源的方式

上一章給大家講了SpringBoot的動態切換數據源的配置，如果只是想讀寫分離的話，在第6步使用的時候，可以用如下方法來替換上一章的方式

1.定義一個註解，來標識選擇的數據源

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface DataSourceSelector {
 DataSourceKey value() default DataSourceKey.USER;
}

2.定義一個切面

@Aspect
@Component
@Order(20)
public class DataSourceSelectorAspect {
 
@Around("@annotation(dataSourceSelector)")
public Object proceed(ProceedingJoinPoint pjp, DataSourceSelector dataSourceSelector) throws Throwable {
 try {
 DataSourceKey dataSourceKey = dataSourceSelector.value();
 DbContextHolder.setDataSourceType(dataSourceKey);
 Object result = pjp.proceed();
 DbContextHolder.clearDataSourceType();
 return result;
 } finally {
 // restore state
 DbContextHolder.clearDataSourceType();
 }
}
}

3.使用方式

@Repository
public class ProductRepository {
 @Autowired
 private ProductMapper productMapper;
 @DataSourceSelector(value =DataSourceKey.PRODUCT) 
 public Product getProductById(Integer id){
 return productMapper.selectByPrimaryKey(id);
 }
}

關鍵字: Object UTF-8 Integer