SpringBoot:yml文件中的ModelAttribute默认属性不起作用

Question

年龄限制默认值不是由modeldattribute选择的，但是它与请求参数配合得很好。

YML文件

age:            
    default:
        limit:  60  

下面是带有请求参数Request的旧代码

public ResponseEntity<Account> getPersonAccount(@RequestParam String name,@Min(value=0) @RequestParam(required = false, defaultValue = "${age.default.limit}") Integer limit
){
}

下面是ModelAttribute请求的新代码

public ResponseEntity<Account> getPersonAccount(@ModelAttribute("person" ) Person person) {}

@Configuration
public class Person implements Serializable {
    private String name;
    @Value("${age.default.limit}" )
    private Integer limit;
    getter/setter
}

Answer 1

public class PersonController { 
@Value("${age.default.limit}" )
private Integer limit;

@ModelAttribute("person")
public Person populatePerson() {
    Person person = new Person();
    person.setLimit(limit);
    return user;
}

public ResponseEntity<Account> getPersonAccount(@ModelAttribute("person" ) Person person) {}

}