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在spring boot中,簡單幾步,讀取設定檔(application.yml)中各種不同類型的屬性值:
1、引入依賴:
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- <!-- 支援 @ConfigurationProperties 註解 -->
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-configuration-processor</artifactId>
- <optional>true</optional>
- </dependency>
2、設定檔(application.yml)中配置各個屬性的值:
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- myProps: #自訂的屬性和值
- 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:
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- @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<Map<String, String>> listProp1 = new ArrayList<>(); //接收prop1裡面的屬性值
- 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<Map<String, String>> getListProp1() {
- return listProp1;
- }
- public List<String> getListProp2() {
- return listProp2;
- }
-
- public String[] getArrayProps() {
- return arrayProps;
- }
-
- public void setArrayProps(String[] arrayProps) {
- this.arrayProps = arrayProps;
- }
-
- public Map<String, String> getMapProps() {
- return mapProps;
- }
-
- public void 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:
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- @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:
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- 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"}
原始碼參考:https://github.com/xujijun/my-spring-boot
spring boot 讀取設定檔(application.yml)中的屬性值111