parameters.java

招标投标网上系统

/*
 * @(#)Parameters.java 
 *
 * Copyright 2003 by SYNTC, All rights reserved.
 *
 * This software is the confidential and proprietary information of SYNTC.
 * ("Confidential Information").
 */
package cn.com.syntc.common.io;

import java.io.Serializable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.Enumeration;
import java.util.LinkedList;

/**
 * title:     Parameters<p>
 * description:         把上一页面所提交Form的内容转存到Parameters class中<p>
 * authority:       Copyright (c) <p>
 * company:       <p>
 * @author  Wang Yong
 * @version 1.0
 */
public class Parameters extends ParameterBase {
  // DEBUG FLAG
  private final static boolean DEBUG = false;

  /**
   * 构造函数
   * @param request 系统得到的request
   * @param response  系统得到的response
   */
  public Parameters(HttpServletRequest request) {
    HttpSession session = request.getSession();
    setRequestParameters(request);
    setSessionParameters(session);
  }
  /**
   * 把上一页面所提交Form的内容转存到Parameters class中
   * @param request 系统得到的request
   * @param response  系统得到的response
   */
  public void setRequestParameters(HttpServletRequest request){
    try{
      Enumeration allParameterNames = request.getParameterNames();
      while(allParameterNames.hasMoreElements()){
        String paramName = (String)allParameterNames.nextElement();
        //System.out.println("paramName = " + paramName);
        String [] paramValue = request.getParameterValues(paramName);
        int paramValueSize = paramValue.length;
        for(int i=0; i<paramValueSize;i++){
          setParameters("request",this.getParameterName(paramName,i+1), paramValue[i]);
          if(DEBUG){
            System.out.println(paramName+"-"+paramValue[i]);
          }
        }
      }
    }catch(Exception e){
      //
    }

  }

  /**
   *   This method modify parameter name of http request for <SELECT multiple>
   */
  private String getParameterName(String parameterName, int index){
    try{
      String multipleName;
      if(parameterName.startsWith("multi_")||parameterName.startsWith("MULTI_")){
        multipleName = parameterName.substring(6) + index;
        //System.out.println("multiple name = " + multipleName);
        return multipleName;
      } else {
        if(index != 1){
          multipleName = parameterName + Integer.toString(index);
        } else {
          multipleName = parameterName;
        }
        return multipleName;
      }
    }catch(Exception e){
      // error
      return parameterName;
    }
  }


  /**
   * 把session中的内容转存到Parameters class中
   * @param request 系统得到的request
   * @param response  系统得到的response
   */
  public void setSessionParameters(HttpSession session){
    try{
      Enumeration allParameterNames = session.getAttributeNames();
      while(allParameterNames.hasMoreElements()){
        String paramName = (String)allParameterNames.nextElement();
        //System.out.println("paramName = " + paramName);
        Object paramValue = session.getAttribute(paramName);
        setParameters("session", paramName , paramValue);
      }
    }catch(Exception e){
      //
    }

  }

}