Example of object change caused by different JSP threads

 

The code is as follows:

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<% Final HttpServletRequest f = request; System. out. println ("sdaddsdasdsd "); New Thread ()         { Public void run ()             { RequestDispatcher rd; Try                 { F. setCharacterEncoding ("gb2312 ");                 } Catch (Exception e)                 { E. printStackTrace ();                 } String SiteName = f. getParameter ("SiteName "); String Name = f. getParameter ("Name "); String userAccount = f. getParameter ("userAccount "); String userPasswd = f. getParameter ("userPasswd "); String databaseAddress = f. getParameter ("databaseAddress "); String databaseName = f. getParameter ("databaseName "); String databaseAccount = f. getParameter ("databaseAccount "); String databasePasswd = f. getParameter ("databasePasswd ");                                     System. out. println (SiteName ); System. out. println (Name ); System. out. println (userAccount ); System. out. println (userPasswd ); System. out. println (databaseAddress ); System. out. println (databaseName ); System. out. println (databaseAccount ); System. out. println (databasePasswd );                           New org. Rudiment. Blog. Install (SiteName, userAccount, userPasswd, Name, databaseAddress, databaseName, databaseAccount, databasePasswd, f );             } }. Start ();             %>

Sysyem. out. println () all are null

If it is placed outside the Thread, the value can be obtained. This will be studied later. Share it.