要注意的地方是 application.yml 中不能用驼峰式写法(systemParams)要改成system-params
方法一:
引入依赖:
org.springframework.boot spring-boot-configuration-processortrue
配置文件(application.yml)中配置各个属性的值:
myProps: #自定义的属性和值 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
创建一个bean来接收配置信息:
@Component
@ConfigurationProperties(prefix="myProps") //接收application.yml中的myProps下面的属性
public class MyProps {
private String simpleProp;
private String[] arrayProps;
private List
启动后,这个bean里面的属性就会自动接收配置的值了。
单元测试用例:
@Autowired
private MyProps myProps;
@Test
public void propsTest() throws JsonProcessingException {
System.out.println("simpleProp: " + myProps.getSimpleProp());
System.out.println("arrayProps: " + objectMapper.writevalueAsString(myProps.getArrayProps()));
System.out.println("listProp1: " + objectMapper.writevalueAsString(myProps.getListProp1()));
System.out.println("listProp2: " + objectMapper.writevalueAsString(myProps.getListProp2()));
System.out.println("mapProps: " + objectMapper.writevalueAsString(myProps.getMapProps()));
}
测试结果:
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"}
方法二:
不用写 set 方法,直接给注解。
前提是要装一个插件:lombok 。 直接在插件中搜索到它,装上就行了
直接获取一个属性
image:
location: D:/images/
@Value("${image.location}")
private String location;
以上这篇在SpringBoot 中从application.yml中获取自定义常量方式就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持考高分网。



