codefilter.java

动态网站管理发布系统

package com.ntsky.common;

public class CodeFilter
{

    public CodeFilter()
    {
    }

    public static String toHtml(String s)
    {
        if(s == null){
            s = "";
            return s;
        } else{
            s = Replace(s.trim(), "&", "&");
            s = Replace(s.trim(), "<", "&lt;");
            s = Replace(s.trim(), ">", "&gt;");
            s = Replace(s.trim(), "\t", "    ");
            s = Replace(s.trim(), "\r\n", "\n");
            s = Replace(s.trim(), "\n", "<br>");
            s = Replace(s.trim(), "  ", " &nbsp;");
            s = Replace(s.trim(), "'", "&#39;");
            s = Replace(s.trim(), "\\", "&#92;");
            return s;
        }
    }

    public static String toUbbHtml(String s)
    {
        if(s == null)
        {
            s = "";
            return s;
        } else
        {
            s = Replace(s, "<br>", "\n");
            s = Replace(s, "&amp;", "&");
            s = Replace(s, "&nbsp;", " ");
            s = Replace(s, "&#39;", "'");
            s = Replace(s, "&#92;", "\\");
            return s;
        }
    }

    public static String unHtml(String s)
    {
        s = Replace(s, "<br>", "\n");
        s = Replace(s, "&nbsp;", " ");
        return s;
    }

    public static String Replace(String source, String oldString, String newString)
    {
        StringBuffer output = new StringBuffer();
        int lengthOfsource = source.length();
        int lengthOfold = oldString.length();
        int posStart;
        int i;
        for(posStart = 0; (i = source.indexOf(oldString, posStart)) >= 0; posStart = i + lengthOfold)
        {
            output.append(source.substring(posStart, i));
            output.append(newString);
        }

        if(posStart < lengthOfsource)
            output.append(source.substring(posStart));
        return output.toString();
    }
}