codefilter.jsp

jsp学习 jsp编程白例源代码此部分是指文件夹名为第1～9章中的内容（如表1）

<%!
String Replace(String str_source,String str_original,String str_new) {
    if(str_source == null) return null;
    StringBuffer output = new StringBuffer();
    int lengOfsource = str_source.length();
    int lengOfold = str_original.length();
    int posStart = 0;
    int pos;
    while((pos = str_source.indexOf(str_original,posStart)) >= 0) {
      output.append(str_source.substring(posStart,pos));
      output.append(str_new);
      posStart = pos + lengOfold;
    }
    if(posStart < lengOfsource) {
      output.append(str_source.substring(posStart));
    }
    return output.toString();
  }

String toHtml(String s) 
{
    s = Replace(s,"<","&lt;");
    s = Replace(s,">","&gt;");
    s = Replace(s,"&","&amp;");
    s = Replace(s,"\t","    ");
    s = Replace(s,"\r\n","\n");
    s = Replace(s,"\n","<br>");
    s = Replace(s,"  "," &nbsp;");
    s = Replace(s,"'","&#39;");
    s = Replace(s,"\\","&#92;");
    return s;
}
String unHtml(String s)
{	
	s = Replace(s,"&nbsp;"," ");
	s = Replace(s,"<br>","\n");
	return s;
}
%>