@ConfigurationProperties和@Value

application.properties配置

person.name=admin

person.address=shanghai

person.email=123

person.map.k1=v1

person.map.k2=v2

先看一下@ConfigurationProperties的使用

 

/**
 * 支持Validated校验
 */
@Component
@ConfigurationProperties(prefix = "person")
@Validated
public class Person {
    private String name;
    private String address;
    @Email
    private String email;
    private Map map;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public Map getMap() {
        return map;
    }
    public void setMap(Map map) {
        this.map = map;
    }
    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", address='" + address + '\'' +
                ", email='" + email + '\'' +
                ", map=" + map +
                '}';
    }
}

输出：

Person{name='admin', address='shanghai', email='[email protected]', map={k1=v1, k2=v2}}

 

再看一下@Value的使用

 

/**
 * value注解不支持复杂类型，如map,list
 */
@Component
public class PersonValue {
    @Value("${person.name}")
    private String name;
    @Value("${person.address}")
    private String address;
    //value注解支持SpEl表达式
    @Value("#{20}")
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "PersonValue{" +
                "name='" + name + '\'' +
                ", address='" + address + '\'' +
                ", age=" + age +
                '}';
    }
}

输出

PersonValue{name='admin', address='shanghai', age=20}

 

总结

	@ConfigurationProperties	@Value
是否支持校验	支持	不支持
是否支持复杂类型	支持	不支持
SpEl	不支持	支持