skinutil.java

JSP聊天系统

package org.ehotsoft.yekki.util;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.io.IOException;
import javax.servlet.http.*;

import javax.servlet.jsp.JspWriter;

import org.apache.ecs.html.Script;

public final class SkinUtil
{

    /*private static final long SECOND = 1000L;
    private static final long MINUTE = 60000L;
    private static final long HOUR = 0x36ee80L;
    private static final long DAY = 0x5265c00L;
    private static final long WEEK = 0x240c8400L;
    private static final int MAX_COOKIE_AGE = 0x49d400;
    private static final String DAYS_OF_WEEK[] = {
        "星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "六"
    };
    private static final SimpleDateFormat dateFormatter = new SimpleDateFormat("EEEE, MMM d 'at' h:mm a");
    private static final SimpleDateFormat yesterdayFormatter = new SimpleDateFormat("'昨天' h:mm a");
    private static final int ENCODE_XORMASK = 90;
    private static final char ENCODE_DELIMETER = 2;
    private static final char ENCODE_CHAR_OFFSET1 = 65;
    private static final char ENCODE_CHAR_OFFSET2 = 104;
	*/
    private SkinUtil() {

    }
	
	/*
    public static final String dateToText(Date date) {

        if(date == null)
            return "";
        long l = System.currentTimeMillis() - date.getTime();
        if(l / 0x36ee80L < 1L)
        {
            long l1 = l / 60000L;
            if(l1 == 0L)
                return "不到一分钟前";
            if(l1 == 1L)
                return "一分钟前";
            else
                return l1 + " 分钟以前";
        }
        if(l / 0x5265c00L < 1L)
        {
            long l2 = l / 0x36ee80L;
            if(l2 <= 1L)
                return "一小时以前";
            else
                return l2 + " 小时以前";
        }
        if(l / 0x240c8400L < 1L)
        {
            double d = (double)l / 86400000D;
            if(d <= 1.0D)
                return yesterdayFormatter.format(date);
            else
                return dateFormatter.format(date);
        } else
        {
            return dateFormatter.format(date);
        }
    }

    private static String[] decodePasswordCookie(String s)
    {
        if(s == null || s.length() <= 0)
            return null;
        char ac[] = s.toCharArray();
        byte abyte0[] = new byte[ac.length / 2];
        int j = 0;
        int k = 0;
        for(; j < abyte0.length; j++)
        {
            int i = ac[k++] - 65;
            i |= ac[k++] - 104 << 4;
            abyte0[j] = (byte)(i ^ 90 + j);
        }

        s = new String(abyte0);
        int l = s.indexOf(2);
        String s1 = l >= 0 ? s.substring(0, l) : "";
        String s2 = l >= 0 ? s.substring(l + 1) : "";
        return (new String[] {
            s1, s2
        });
    }

    private static String encodePasswordCookie(String s, String s1)
    {
        StringBuffer stringbuffer = new StringBuffer();
        if(s != null && s1 != null)
        {
            byte abyte0[] = (s + '\002' + s1).getBytes();
            for(int j = 0; j < abyte0.length; j++)
            {
                int i = abyte0[j] ^ 90 + j;
                stringbuffer.append((char)(65 + (i & 0xf)));
                stringbuffer.append((char)(104 + (i >> 4 & 0xf)));
            }

        }
        return stringbuffer.toString();
    }

    public static final Cookie getCookie(HttpServletRequest httpservletrequest, String s)
    {
        Cookie acookie[] = httpservletrequest.getCookies();
        if(acookie == null || s == null || s.length() == 0)
            return null;
        for(int i = 0; i < acookie.length; i++)
            if(acookie[i].getName().equals(s))
                return acookie[i];

        return null;
    }

    public static final String getCookieValue(HttpServletRequest httpservletrequest, String s)
    {
        Cookie cookie = getCookie(httpservletrequest, s);
        if(cookie != null)
            return cookie.getValue();
        else
            return null;
    }

    public static final long getLastVisited(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
    {
        return getLastVisited(httpservletrequest, httpservletresponse, true);
    }

    public static final long getLastVisited(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, boolean flag)
    {
        HttpSession httpsession = httpservletrequest.getSession();
        long l = System.currentTimeMillis();
        String s = (String)httpsession.getValue("yekki_last_visited");
        if(s != null)
            try
            {
                long l1 = Long.parseLong(s);
                Cookie cookie = new Cookie("yekki_last_visited", Long.toString(l));
                cookie.setMaxAge(0x278d00);
                cookie.setPath("/");
                httpservletresponse.addCookie(cookie);
                return l1;
            }
            catch(NumberFormatException numberformatexception)
            {
                numberformatexception.printStackTrace();
            }
        long l2 = l;
        s = getCookieValue(httpservletrequest, "yekki_last_visited");
        if(s != null)
            try
            {
                l2 = Long.parseLong(s);
            }
            catch(NumberFormatException _ex) { }
        httpsession.putValue("yekki_last_visited", Long.toString(l2));
        Cookie cookie1 = new Cookie("yekki_last_visited", Long.toString(l));
        cookie1.setMaxAge(0x278d00);
        cookie1.setPath("/");
        httpservletresponse.addCookie(cookie1);
        return l2;
    }

    public static final void invalidateCookie(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s)
    {
        Cookie cookie = new Cookie(s, null);
        cookie.setMaxAge(0);
        cookie.setPath("/");
        httpservletresponse.addCookie(cookie);
    }

    public static final String quoteOriginal(String s, String s1, int i)
    {
        if(s == null || s.length() == 0)
            return "";
        int j = s.length();
        StringBuffer stringbuffer = new StringBuffer(s.length());
        for(int k = 0; k < j;)
        {
            String s2 = StringUtil.chopAtWord(s.substring(k), i);
            k += s2.length() + 1;
            stringbuffer.append(s1).append(s2.trim()).append("\\n");
        }

        return stringbuffer.toString();
    }

    public static final void remove(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s)
    {
        HttpSession httpsession = httpservletrequest.getSession();
        httpsession.removeValue(s);
        Cookie cookie = new Cookie(s, null);
        cookie.setMaxAge(0);
        cookie.setPath("/");
        httpservletresponse.addCookie(cookie);
    }

    public static final String retrieve(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s)
    {
        return retrieve(httpservletrequest, httpservletresponse, s, false);
    }

    public static final String retrieve(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s, boolean flag)
    {
        HttpSession httpsession = httpservletrequest.getSession();
        String s1 = (String)httpsession.getValue(s);
        if(s1 == null)
            s1 = getCookieValue(httpservletrequest, s);
        if(flag)
            remove(httpservletrequest, httpservletresponse, s);
        return s1;
    }

    public static final void store(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s, String s1)
    {
        store(httpservletrequest, httpservletresponse, s, s1, 0, false);
    }

    public static final void store(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s, String s1, int i)
    {
        store(httpservletrequest, httpservletresponse, s, s1, i, false);
    }

    public static final void store(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s, String s1, int i, boolean flag)
    {
        if(s == null)
            return;
        HttpSession httpsession = httpservletrequest.getSession();
        if((String)httpsession.getValue(s) != null && !flag)
            return;
        httpsession.putValue(s, s1);
        if(i > 0)
        {
            Cookie cookie = new Cookie(s, s1);
            cookie.setMaxAge(i);
            cookie.setPath("/");
            httpservletresponse.addCookie(cookie);
        }
    }
	*/
	public static final void alert( JspWriter out, String info, int step ) {
		
		Script script = new Script();
		script.addElement( "alert( '" + info + "' );" );
		script.addElement( "history.go( " + step + " );" );

		try {

			out.println( script.toString() );
		}
		catch ( IOException e ) {
			
			//ignore
		}
	}
	
	public static final void alert( JspWriter out, String info ) {
		
		alert( out, info, -1 );
	}

	public static final void redirect( JspWriter out, String info, String url ) {
		
		Script script = new Script();

		script.addElement( "alert( '" + info + "' );" );
		script.addElement( "window.location = '" + url + "';" );

		try {

			out.println( script );
		}
		catch ( IOException e ) {
			
			//ignore
		}
	}

}