paramutils.java

一个用jsp技术实现的新闻发布系统

package net.ijsp.news.util;

/**
*  Title  锋网新闻发布
*  @author: ccjsmile
*  Company: http://www.ijsp.net
*  Copyright: Copyright (c) 2003
*  @version 1.0 beta
*/

import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;

public class ParamUtils
{

    public ParamUtils()
    {
    }

    public static String getString(HttpServletRequest request, String s, String defaultString)
        throws Exception
    {
        String s1 = getString(request, s);
        if(s1 == null)
            return defaultString;
        else
            return s1;
    }

    public static int getInt(HttpServletRequest request, String s, int defaultInt)
    {
        int j=0;
        try
        {
            String temp = getString(request, s);
            if(temp == null) {
                j = defaultInt;
             }else{
                j = Integer.parseInt(temp);
            }
        }catch(NumberFormatException e){
            j=0;
        }
        return j;
    }

    public static long getLong(HttpServletRequest request, String s, long defaultLong)
    {
        long l = 0;
        try
        {
            String temp = getString(request, s);
            if(temp == null){
                l = defaultLong;
            }else{
                l = Long.parseLong(temp);
            }
        }
        catch(NumberFormatException e)
        {
            l=0;
        }
        return l;
    }

    private static String getString(HttpServletRequest request, String s)
    {
        String temp = null;
        try
        {
            temp = request.getParameter(s).trim();
        }
        catch(Exception exception) { }
        return temp;
    }
}