Question

Eclipse编写SpringBoot中的Application.yml没有任何提示

编辑这个文件的时候，没有出现任何提示，插件STS已安装

Answer 1

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：
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<!-- 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：
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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：
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@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：
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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())); }

测试结果：
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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"}

Answer 2

Spring Boot 是 Spring 产品中一个新的子项目，致力于简便快捷地搭建基于 Spring 的独立可运行的应用。大多数的 Spring Boot 应用只需要非常少的 Spring 配置。 你能够使用 Spring Boot 创建 Java 应用并通过 java -jar 来运行或者创建传统的通...