JSP不同线程导致对象改变

<%
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();

%>