JSP

Use a custom Label Although you can embed Java code in a JSP page and execute it on the server side, the JSP also supports the use of custom tags to insert dynamic content, and it has a mechanism for inserting your own HTML-like tags into your JSP

Copy code code as follows: Filter class public class Econdingfilter implements Filter { Private String charset = null; Private ServletContext context = null; Private String Path = ""; /** * Store data in local file before

1 JavaScript, set a variable to allow only one submission at a time. 　　 2 or JavaScript, put the submit button or image as disable onsubmit= "Getelbyid (' submitinput '). Disabled = true; return true; " > 3 synchronization token mechanism

JSP page： Copy Code code as follows: $ (document). Ready (function () { SetInterval (function MyTimer () { Alert (' a '); Getviews (); },1000); }); Play function Getviews () { $.ajax ({ ' URL ':

1.sessionSession object refers to a client-to-server conversationStart with a webapplication from the customer connection to the serverUntil the client disconnects from the server. It is an instance of the HttpSession class Number