在spring boot中，簡單幾步，讀取配置文件(application.yml)中各種不同類型的屬性值：
1、引入依賴：
org.springframework.boot
spring-boot-configuration-processor
true
2、配置文件(application.yml)中配置各個屬性的值：
myProps: #自定義的屬性和值
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
3、創(chuàng)建一個bean來接收配置信息：
@Component
@ConfigurationProperties(prefix="myProps") //接收application.yml中的myProps下面的屬性
public class MyProps {
private String simpleProp;
private String[] arrayProps;
private List> listProp1 = new ArrayList<>(); //接收prop1里面的屬性值
private List listProp2 = new ArrayList<>(); //接收prop2里面的屬性值
private Map mapProps = new HashMap<>(); //接收prop1里面的屬性值
public String getSimpleProp() {
return simpleProp;
}
//String類型的一定需要setter來接收屬性值;maps, collections, 和 arrays 不需要
public void setSimpleProp(String simpleProp) {
this.simpleProp = simpleProp;
}
public List> getListProp1() {
return listProp1;
}
public List getListProp2() {
return listProp2;
}
public String[] getArrayProps() {
return arrayProps;
}
public void setArrayProps(String[] arrayProps) {
this.arrayProps = arrayProps;
}
public Map getMapProps() {
return mapProps;
}
public void setMapProps(Map mapProps) {
this.mapProps = mapProps;
}
}
啟動后，這個bean里面的屬性就會自動接收配置的值了。
4、單元測試用例：
@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()));
}
測試結果：
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"}
源代碼參考：https://github.com/xujijun/my-spring-boot