In the first login screen, please, add the JavaScript code, and JavaScript code is used to verify the data for null values, and refresh verification code;
Please add JavaBean classes, the User's User name and password to encapsulate JavaBean to the named User, so the session of data should be kept in a session object JavaBean data that the User types

CodePudding user response:

JavaBean classes should need you to write your own, this depends on your programming methods and rules