1. @ConfigurationProperties

下面是application.yaml配置文件

dog:name: 154@qq.com${random.uuid}age: ${random.int}people:age: 17dog:name: 小王age: 3list:- a- bmap: {k: s, v: b}

下面是People.java

@Component
@Data
@ConfigurationProperties(prefix = "people") // 读取配置文件内容
public class People {@Value("小帅") // 配置文件里没有这一项，直接赋值private String name;private Integer age;private Dog dog;private List<String> list;private Map<String, String> map;
}

为了支持@ConfigurationProperties，需要加入依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional>
</dependency>

2. @Value

下面是cat.properties配置文件

name=xiaoming

下面是cat.java

@Component
@Data
@PropertySource(value = "classpath:cat.properties") // 指定配置文件路径
public class Cat {@Value("${name}") // 正则表达式取值private String name;
}

3. @Validated

下面是Dog.java

@Component
@Data
@ConfigurationProperties(prefix = "dog")
@Validated
public class Dog {@Email // 可以配置message报错信息private String name;private Integer age;
}

配置文件yaml如上所示
@Email可以指定name的格式
如需支持，最新版本SpringBoot中需要添加依赖

 <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId></dependency>