实体：标注@Component和@ConfigurationProperties，prefix：前缀是site的配置自动绑定到类中的属性，如果不写@Component，则需要在主启动程序上面加@EnableConfigurationProperties(SiteInfo.class)



package com.jay.SpringBootStudy8.utils;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix = "site")
public class SiteInfo {
    @Override
    public String toString() {
        return "SiteInfo{" +
                "domain='" + domain + '\'' +
                ", copyright='" + copyright + '\'' +
                '}';
    }
    private String domain;
    private String copyright;

    public String getDomain() {
        return domain;
    }

    public void setDomain(String domain) {
        this.domain = domain;
    }
    public String getCopyright() {
        return copyright;
    }

    public void setCopyright(String copyright) {
        this.copyright = copyright;
    }
}


 yml配置，properties是：site.domain=www.jay.com



site:
  domain: www.jay.com
  copyright: xxx@v1.1.1


 使用



@Autowired
    private SiteInfo siteInfo;
    @Test
    public void test3(){
        System.out.println(siteInfo);
    }


　　结果输出就是SiteInfo{domain='www.jay.com', copyright='xxx@v1.1.1'}，属性值就自动绑定上了。