属性配置（封装实体类）

1.定义一个entity

@Component
@ConfigurationProperties(prefix="user")
public class User {

    private int id;
    private String names;
    private String password;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    
    public String getNames() {
        return names;
    }
    public void setNames(String names) {
        this.names = names;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
    
}

2.在配置文件进行配置

user.id=1
user.names=tom
user.password=123