request.java

来自「《JSP网站开发典型模块与实例精讲》一书光盘源码」· Java 代码 · 共 68 行

package com.jspsmart.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;
}


public String getParameter(String name)
{
    if (name == null)
        throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
    Hashtable values = (Hashtable) m_parameters.get(name);
    if (values == null)
        return null;
    else
        return (String) values.get(new Integer(0));
}


public Enumeration getParameterNames()
{
    return m_parameters.keys();
}


public String[] getParameterValues(String name)
{
    if (name == null)
        throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
    Hashtable values = (Hashtable) m_parameters.get(name);
    if (values == null)
        return null;
    String strValues[] = new String[values.size()];
    for (int i = 0; i < values.size(); i++)
        strValues[i] = (String) values.get(new Integer(i));

    return strValues;
}


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 values = (Hashtable) m_parameters.get(name);
        values.put(new Integer(values.size()), value);
    }
    else
    {
        Hashtable values = new Hashtable();
        values.put(new Integer(0), value);
        m_parameters.put(name, values);
        m_counter++;
    }
}
}