Retrieving form Parameters using HttpServletRequest

• Form parameters are key,value pairs where both are string objects.
• A Form parameter can be associated with single or multiple values.

     Methods :
      
     public String getParameter(String pname)   ----  returns the value associated with the specified
                                                                                     parameter.

    public String[] getParameterValues(String pname)  ---- returns all values associated with specified
                                                                                                 paremter.

    public Enumeration getParameternames()  ----   returns all formParameter names associated with 
                                                                                    the  request.

    public Map getParameterMap()          ----              returns map object containing parameter names
                                                                                       as  keys and parameter values as map values.


       key String                                                        value String[]
   ----------------                                               ---------------------
             user                                                           {  degree }
          course                                                          {  SCJP,SCWCD }
             age                                                            {  67 }
           Sales                                                           { 1000 }


Programme to retrieve the above parameters :


Map  m=req.getParameterMap();
for(object o1 : m) {
mapentry m1=(map.entry)o1;
String pname=(String) m1.getkey();
String[] pValues=(String[])m1.getValue();
out.println(pname);
for(String s1:pValues)
{
     out.println(s1);
}
}