SpringBoot2.0读取yml配置文件的值(application.yml)

由于项目需要，我们有时候会把一些动态的参数配置放置在yml文件里，例如外围系统的url，然后对其进行访问。这个时候，就需要在SpringBoot2.0下读取YML文件的属性值

maven依赖

<!-- 支持 @ConfigurationProperties 注解 -->  
        <dependency>  
            <groupId>org.springframework.boot</groupId>  
            <artifactId>spring-boot-configuration-processor</artifactId>  
            <optional>true</optional>  
        </dependency>  

application.yml中写入属性

system:
    xxxxsysUrl: http://127.0.0.1:8091/checkxxxxsys
    miniprogramUrl: http://127.0.0.1/miniprogram

MyProps的配置类，支持被@Autowired

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component  
@ConfigurationProperties(prefix="system") //接收application.yml中的system下面的属性  
public class MyProps {
    public String xxxsysUrl;
    public String miniprogramUrl;
    public String getXxxsysUrl() {
        return xxxsysUrl;
    }
    public void setXxxsysUrl(String xxxsysUrl) {
        this.xxxsysUrl = xxxsysUrl;
    }
    public String getMiniprogramUrl() {
        return miniprogramUrl;
    }
    public void setMiniprogramUrl(String miniprogramUrl) {
        this.miniprogramUrl = miniprogramUrl;
    }
}

MyProps调用实战

    //注入配置类
    @Autowired
    MyProps myProps;

    @Override
    public String getCheckResult(String checkDate,String checkNum, String projectid) {
        System.out.println(""+myProps.getXxxsysUrl());
        try {
        //根据配置文件动态请求接口
            String responseStr=HttpUtil.get(myProps.getXxxsysUrl()+"/xxxcollectxxx/"+checkDate+"/"+checkNum+"/"+projectid);
            System.out.println(responseStr);
            return responseStr;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

后话

myYml:
  simpleProp: simplePropValue
  arrayProps: 1,2,3,4,5
  listProp1:
    - name: abc
      value: abcValue
    - name: efg
      value: efgValue
  listProp2:
    - config2Value1
    - config2Vavlue2
  mapProps:
    key1: value1
    key2: value2
    private 

List<Map<String, String>> listProp1 = new ArrayList<>(); //接收prop1里面的属性值
    private List<String> listProp2 = new ArrayList<>(); //接收prop2里面的属性值
    private Map<String, String> mapProps = new HashMap<>(); //接收prop1里面的属性值