JSP learning memo (nseer & Accounting)

1. nseer Logon
ERP/home/login. jsp-> Work. Java (servlet, Judge logon, redirect: Response. sendredirect (URL ))
-> ERP/main/index. jsp (index. jsp uses frameset, including index_top.jsp, index_middle.jsp, and index_bottom.jsp. index_top.jsp includes the main menu and index_middle.jsp is the main page)
2. Obtain Parameters
String Language = request. getparameter ("language ");
3. Set the session and obtain the session
In the small script, the session is a hidden variable and can be used directly. In the servlet, you can get the result through the request:
Httpsession session = request. getsession (true );
Servletcontext application = session. getservletcontext ();
Set: Session. setattribute ("user", user );
Get: Session. getattribute ("user ")
4. Import third-party jar packages:
Right-click the project and choose Properties> JAVA build path> libraries> Add external jars.