SpringBoot属性绑定Environment和Binder

helloWorld:
    properties:
        spring:
            json:
                trusted:
                    packages: '*'
                type:
                    mapping: fast.cloud.nacos.fastbootkafka.domain.TopicATest:fast.cloud.nacos.fastbootkafka.domain.TopicATest

binder.test.bname=bindname
binder.test.bage=18
binder.test.binderInnerTest.innerName=bindInnername
binder.test.binderInnerTest.innerage=28

binder.test2.list[0]=valuea
binder.test2.list[1]=valueb
binder.test2.list[2]=valuec
binder.test2.list[3]=valued

public class BinderBootstrap {
    
    

    public static void main(String[] args) {
    
    
        ConfigurableApplicationContext context = SpringApplication.run(EnableHelloWorldBootstrap.class, args);
        ConfigurableEnvironment environment = context.getBean(ConfigurableEnvironment.class);
        //配置properties 信息
        BindResult<Properties> propertiesBindResult = Binder.get(environment)
                .bind("hello-world.properties", Properties.class);
        BindResult<Map> mapBindResult = Binder.get(environment)
                .bind("hello-world.properties", Map.class);
        BindResult<BinderTest> binderTestBindResult = Binder.get(environment).bind("binder.test", Bindable.of(BinderTest.class));
        BindResult<List<String>> resultList = Binder.get(environment).bind("binder.test2.list", Bindable.listOf(String.class));
        System.out.println();
    }

}

1、可以看到复杂key value类型，转换为Map和Properties的不同
2、List、复杂类对象都可以获取到值

参考

• 【SpringBoot】配置文件的加载与属性值的绑定