@ConfigurationProperties注解的使用

不断总结 + 探索 + 温故知新

• 总结：

1. @ConfigurationProperties写在类上读取默认配置项
2. @ConfigurationProperties写在方法上读取默认配置项
3. @ConfigurationProperties结合@PropertySource读取自定义配置项
4. @value 读取默认配置项
5. @value读取自定义配置项

• @ConfigurationProperties写在类上读取默认配置项

@ConfigurationProperties(prefix = "roy.ding")
@Component
@Data
public class RoyDing1Properties {
    private String test;

    private String test1;
}

• @ConfigurationProperties写在方法上读取默认配置项

@Configuration
public class UserinfoConfig {

    @Bean
    @ConfigurationProperties(prefix = "userinfo")
    public UserInfo userInfo(){
        return new UserInfo();
    }
}

@Data
@ToString
public class UserInfo {
    private String name;
    private Integer age;
    private Boolean active;
    private Map<String,Object> map;
    private Date createdDate;
    private List<String> hobbies;
}

• @ConfigurationProperties结合@PropertySource读取自定义配置项

@ConfigurationProperties(prefix = "roy.ding1")
@Component
@PropertySource(value = {"classpath:mycustom.properties"})
@Data
public class RoyDingProperties {
    private String test;

    private String test1;
    
}

• @value 读取默认配置项

@Component
@Data
public class UserInfoValueConfig {

    @Value("${userinfo.name}")
    private String username;
}

• @value读取自定义配置项

@Component
@PropertySource(value = {"classpath:mycustom.properties"})
@Data
public class MyCustomConfig {

    @Value("${userinfo.name1}")
    private String username;
}