一些jsp源代码 可以帮助初学者更容易上手

				package upload;
				
				import java.util.Enumeration;
				import java.util.Hashtable;
				
				public class request
				{
				
				    private Hashtable m_parameters;
				    private int m_counter;
				
				    request()
				    {
				        m_parameters = new Hashtable();
				        m_counter = 0;
				    }
				
				    protected void putParameter(String name, String value)
				    {
				        if(name == null)
				            throw new IllegalArgumentException("The name of an element cannot be null.");
				        if(m_parameters.containsKey(name))
				        {
				            Hashtable hashtable = (Hashtable)m_parameters.get(name);
				            hashtable.put(new Integer(hashtable.size()), value);
				        } else
				        {
				            Hashtable hashtable1 = new Hashtable();
				            hashtable1.put(new Integer(0), value);
				            m_parameters.put(name, hashtable1);
				            m_counter++;
				        }
				    }
				
				    public String getParameter(String s)
				    {
				        if(s == null)
				            throw new IllegalArgumentException("Form's name is invalid or does not exist .");
				        Hashtable hashtable = (Hashtable)m_parameters.get(s);
				        if(hashtable == null)
				            return null;
				        else
				            return (String)hashtable.get(new Integer(0));
				    }
				
				    public Enumeration getParameterNames()
				    {
				        return m_parameters.keys();
				    }
				
				    public String[] getParameterValues(String s)
				    {
				        if(s == null)
				            throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
				        Hashtable hashtable = (Hashtable)m_parameters.get(s);
				        if(hashtable == null)
				            return null;
				        String as[] = new String[hashtable.size()];
				        for(int i = 0; i < hashtable.size(); i++)
				            as[i] = (String)hashtable.get(new Integer(i));
				
				        return as;
				    }
				}