用Swing插件完成一个登陆小程序， 要求绘制图形界面，输入用户名和密码，并进行判断，如果判断正确弹出提示对话框，确定后输入内容清空，若判断不正确，弹出提示错误的对话框并清空输入内容。-Swing plug-in to complete a landing with a small procedure that requires the drawing graphical interface, enter the user name and password, and to judge, if