ConfigurationProperties

@Target({ ElementType.TYPE, ElementType.METHOD })@Retention(RetentionPolicy.RUNTIME)@Documentedpublic @interface ConfigurationProperties {		@AliasFor("prefix")	String value() default "";		@AliasFor("value")	String prefix() default "";	boolean ignoreInvalidFields() default false;		boolean ignoreUnknownFields() default true;}

application.properties

my.bean.load=truemy.bean.id=1my.bean.ip=192.168.3.1

MyProperties

@Component@ConfigurationProperties("my.bean")public class MyProperties {    private String id;    private String ip;    private String load;    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getIp() {        return ip;    }    public void setIp(String ip) {        this.ip = ip;    }    public String getLoad() {        return load;    }    public void setLoad(String load) {        this.load = load;    }    @Override    public String toString() {        return "MyProperties{" +                "id='" + id + '\'' +                ", ip='" + ip + '\'' +                ", load='" + load + '\'' +                '}';    }}

ConfigurationPropertiesBindingPostProcessor

ConfigurationProperties通过BeanPostProcessor的后置处理来实现

public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {	bind(ConfigurationPropertiesBean.get(this.applicationContext, bean, beanName));	return bean;}

JavaBeanBinder

private 
   
     boolean bind(DataObjectPropertyBinder propertyBinder, Bean
    
      bean, BeanSupplier
     
       beanSupplier,			Context context) {	boolean bound = false;    // 所有属性	for (BeanProperty beanProperty : bean.getProperties().values()) {		bound |= bind(beanSupplier, propertyBinder, beanProperty);		context.clearConfigurationProperty();	}	return bound;}