spring boot 读取配置文件(application yml)中的属性值

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1、引入依赖:

		<!-- 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

3、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<Map<String, String>> listProp1 = new ArrayList<>(); //接收prop1里面的属性值	private List<String> listProp2 = new ArrayList<>(); //接收prop2里面的属性值	private Map<String, String> mapProps = new HashMap<>(); //接收prop1里面的属性值		public String getSimpleProp() {		return simpleProp;	}		//String类型的一定需要setter来接收属性值;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;	}}

启动后,这个bean里面的属性就会自动接收配置的值了。

4、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: simplePropValuearrayProps: ["1","2","3","4","5"]listProp1: [{"name":"abc","value":"abcValue"},{"name":"efg","value":"efgValue"}]listProp2: ["config2Value1","config2Vavlue2"]mapProps: {"key1":"value1","key2":"value2"}

源代码参考:https://github.com/xujijun/my-spring-boot

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