request.java

初学者学习用的文件上传代码

//***********************************************
 //Copyright 2002 by BHH丂All Rights Reverved.
 //
 //僔僗僥儉柤          :BestProject
 //僒僽僔僗僥儉柤      :忈奞娗棟
 //
 //===============================================
 //version   曄峏擔         曄峏幰           曄峏撪梕
 //-----------------------------------------------
 //01-00     2002.1.21    丂棝埞愇          峏怴嶌惉
 package bestproject.upload;

import java.util.*;

public class Request {

  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 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++;
    }
  }

  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;
  }

  private Hashtable m_parameters;
  private int m_counter;
}