使用FreeMarker编写一个用户登录实例，当用户在登录页面中没有输入任何信息就登录时，提示用户需要输入用户名和密码方可登录；若用户输入错误的用户名和密码，提示用户输入的用户名和密码错误；若用户输入正确的用户名和密码，登录成功，页面跳转到欢迎用户登录界面。这是一个简单的freemark小实例，希望能帮到大家-Use FreeMarker write a user logs instance, when the user login page do not enter any information on login, the user is prompted to enter a user name and password to log in　if the user enters the wrong user name and password prompt for user name and password User input　 if the user enters the correct user name and password, the login is successful, the page jumps to welcome user login interface. This is a simple freemark small example, we hope to help you