使用方式

1. @Component+@ConfigurationProperties

• 需要实现set/get方法

@ConfigurationProperties(prefix = "car")
@Component
public class Car {
    private String name;
    
    private Integer price;

    private Pet pet;

	// standard getters and setters
}

2. ＠EnableConfigurationProperties + @ConfigurationProperties

＠EnableConfigurationProperties开启对@ConfigurationProperties注解配置Bean的支持

也就是@EnableConfigurationProperties注解告诉Spring Boot 使能支持@ConfigurationProperties

配置类：

@Configuration
@EnableConfigurationProperties(Car.class)
public class MyConfig {

    @Bean("Tom")
    public Pet petBean() {
        return new Pet("cat");
    }
	......
}

普通类（需要读取配置文件）

@ConfigurationProperties(prefix = "car")
public class Car {
    private String name;
    
    private Integer price;

    private Pet pet;

	// standard getters and setters
}