Several ways of annotation assignment
1. @ConfigurationProperties
The following is the application.yaml configuration file
dog:
name: [email protected]${
random.uuid}
age: ${
random.int}
people:
age: 17
dog:
name: 小王
age: 3
list:
- a
- b
map: {
k: s, v: b}
Below is People.java
@Component
@Data
@ConfigurationProperties(prefix = "people") // 读取配置文件内容
public class People {
@Value("小帅") // 配置文件里没有这一项，直接赋值
private String name;
private Integer age;
private Dog dog;
private List<String> list;
private Map<String, String> map;
}
In order to support @ConfigurationProperties, you need to add dependencies
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
2. @Value
The following is the cat.properties configuration file
name=xiaoming
Below is cat.java
@Component
@Data
@PropertySource(value = "classpath:cat.properties") // 指定配置文件路径
public class Cat {
@Value("${name}") // 正则表达式取值
private String name;
}
3. @Validated
Below is 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;
}
The configuration file yaml is as shown above
@Email can specify the format of the name
If support is required, a dependency needs to be added in the latest version of SpringBoot
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>