springboot讀取yml中的配置載入到javabean中
阿新 • • 發佈:2019-01-10
在spring boot中,簡單幾步,讀取配置檔案(application.yml)中各種不同型別的屬性值:
1、引入依賴:
3、建立一個bean來接收配置資訊:
啟動後,這個bean裡面的屬性就會自動接收配置的值了。
1、引入依賴:
- <!-- 支援 @ConfigurationProperties 註解 -->
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-configuration-processor</artifactId>
-
<optional>true</optional
- </dependency>
2、配置檔案(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、建立一個bean來接收配置資訊:
- @Component
- @ConfigurationProperties(prefix="myProps") //接收application.yml中的myProps下面的屬性
- publicclass MyProps {
- private String simpleProp;
- private String[] arrayProps;
-
private List<Map<String, String>> listProp1 =
- private List<String> listProp2 = new ArrayList<>(); //接收prop2裡面的屬性值
- private Map<String, String> mapProps = new HashMap<>(); //接收prop1裡面的屬性值
- public String getSimpleProp() {
- return simpleProp;
- }
- //String型別的一定需要setter來接收屬性值;maps, collections, 和 arrays 不需要
- publicvoid setSimpleProp(String simpleProp) {
- this.simpleProp = simpleProp;
- }
- public List<Map<String, String>> getListProp1() {
- return listProp1;
- }
- public List<String> getListProp2() {
- return listProp2;
- }
- public String[] getArrayProps() {
- return arrayProps;
- }
- publicvoid setArrayProps(String[] arrayProps) {
- this.arrayProps = arrayProps;
- }
- public Map<String, String> getMapProps() {
- return mapProps;
- }
- publicvoid setMapProps(Map<String, String> mapProps) {
- this.mapProps = mapProps;
- }
- }
啟動後,這個bean裡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
- publicvoid 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"}