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spring boot 读取配置文件(application.y

spring boot 读取配置文件(application.y

作者: jackcooper | 来源:发表于2017-06-30 18:17 被阅读911次

    在spring boot中,简单几步,读取配置文件(application.yml)中各种不同类型的属性值:

    1、引入依赖:[html] view plain copy

    <!-- 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:

    [plain] view plain copy

    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:

    [java] view plain copy

    @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:

    [java] view plain copy

       @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:

    **[plain]** [view plain](http://blog.csdn.net/clementad/article/details/51970962#) [copy](http://blog.csdn.net/clementad/article/details/51970962#)
    
    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"}  
    

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

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