1. 编写yaml配置文件

以省市乡三级结构为例，配置文件如下：

administrative:divisions:- code: BJname: 北京children:- code: BJ01name: 东城区children:- code: BJ0101name: 东华门街道- code: BJ0102name: 交道口街道- code: BJ0103name: 和平里街道- code: BJ02name: 西城区children:- code: BJ0201name: 西长安街街道- code: BJ0202name: 新街口街道- code: BJ0203name: 月坛街道- code: SHname: 上海children:- code: SH01name: 黄浦区children:- code: SH0101name: 南京东路街道- code: SH0102name: 外滩街道- code: SH0103name: 半淞园路街道- code: SH02name: 徐汇区children:- code: SH0201name: 天平路街道- code: SH0202name: 徐家汇街道- code: SH0203name: 斜土街道

2. 创建实体类

import lombok.Data;
import com.sun.istack.internal.NotNull;
import org.springframework.validation.annotation.Validated;import java.util.List;@Validated
@Data
public class AdministrativeDivision {private final String code;private final String name;private final List<AdministrativeDivision> children;public AdministrativeDivision(@NotNull String code, @NotNull String name, List<AdministrativeDivision> children) {this.code = code;this.name = name;this.children = children;}
}

3. 创建配置类读取配置文件

import com.zjp.demo.pojo.AdministrativeDivision;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.ConstructorBinding;import java.util.List;@ConfigurationProperties(prefix = "administrative")
@ConstructorBinding
public class AdministrativeDivisionsConfig {private final List<AdministrativeDivision> divisions;public AdministrativeDivisionsConfig(List<AdministrativeDivision> divisions) {this.divisions = divisions;}public List<AdministrativeDivision> getDivisions() {return divisions;}
}

4. 在启动类加 @EnableConfigurationProperties 注解

@SpringBootApplication
@EnableConfigurationProperties(AdministrativeDivisionsConfig.class)
public class DemoApplication {public static void main(String[] args) {SpringApplication.run(DemoApplication.class, args);}
}

5. 测试

import com.zjp.demo.config.AdministrativeDivisionsConfig;
import com.zjp.demo.pojo.AdministrativeDivision;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;import java.util.List;@Slf4j
@SpringBootTest
class AaDemoApplicationTests {@AutowiredAdministrativeDivisionsConfig administrativeDivisionsConfig;@Testpublic void test1() {List<AdministrativeDivision> divisions = administrativeDivisionsConfig.getDivisions();System.out.println(divisions);}
}

输出结果为：

[AdministrativeDivision(code=BJ, name=北京, children=[AdministrativeDivision(code=BJ01, name=东城区, children=[AdministrativeDivision(code=BJ0101, name=东华门街道, children=null), AdministrativeDivision(code=BJ0102, name=交道口街道, children=null), AdministrativeDivision(code=BJ0103, name=和平里街道, children=null)]), AdministrativeDivision(code=BJ02, name=西城区, children=[AdministrativeDivision(code=BJ0201, name=西长安街街道, children=null), AdministrativeDivision(code=BJ0202, name=新街口街道, children=null), AdministrativeDivision(code=BJ0203, name=月坛街道, children=null)])]), AdministrativeDivision(code=SH, name=上海, children=[AdministrativeDivision(code=SH01, name=黄浦区, children=[AdministrativeDivision(code=SH0101, name=南京东路街道, children=null), AdministrativeDivision(code=SH0102, name=外滩街道, children=null), AdministrativeDivision(code=SH0103, name=半淞园路街道, children=null)]), AdministrativeDivision(code=SH02, name=徐汇区, children=[AdministrativeDivision(code=SH0201, name=天平路街道, children=null), AdministrativeDivision(code=SH0202, name=徐家汇街道, children=null), AdministrativeDivision(code=SH0203, name=斜土街道, children=null)])])]