spring学习，请求参数自动绑定到方法参数Object上

一个实体类

public class LoginCommand {    private String userName;    private String password;    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }}

public ModelAndView loginCheck(HttpServletRequest request, LoginCommand loginCommand){    System.out.println(loginCommand.getUserName());

    return new ModelAndView("main");

}

比如localhost:8080/spring/logincheck.html?userName=afwafa

只要参数名对上了就可以取到