Spring Boot 中使用 @ConfigurationProperties 注解

@Configuration
public class DataSourceConfig {     //数据源设置
 
    @Bean(name = "primaryDataSource")//primary : 英文“主要的”
    @Qualifier("primaryDataSource")//是一个合格者标识--表明那个类才是我们需要调用的类
    @ConfigurationProperties(prefix="spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }
 
    @Bean(name = "secondaryDataSource")//secondary ： 英文“次要的”
    @Qualifier("secondaryDataSource")
    @Primary
    @ConfigurationProperties(prefix="spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
 }

spring.datasource.primary.url=jdbc:mysql://localhost:3306/test1
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
 
spring.datasource.secondary.url=jdbc:mysql://localhost:3306/test2
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver