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：
|
1
2
3
4
5
6
|
<!-- 支持 @ConfigurationProperties 注解 --><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> |
2、配置文件（application.yml）中配置各個屬性的值：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
|
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、創建一個bean來接收配置信息：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
@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里面的屬性值 private List<String> listProp2 = new ArrayList<>(); //接收prop2里面的屬性值 private Map<String, String> 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<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：
|
1
2
3
4
5
6
7
8
9
10
11
|
@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：
|
1
2
3
4
5
|
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
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://blog.csdn.net/clementad/article/details/51970962
