java中关于html的转换-JSP教程,Java技巧及代码

请看下面这个例子
  public static string escapehtmltags( string input ) {
        // check if the string is null or zero length — if so, return what was sent in.
        if( input == null || input.length() == 0 ) {
            return input;
        }
        // use a stringbuffer in lieu of string concatenation — it is much more efficient this way.
        stringbuffer buf = new stringbuffer();
        char ch = ;
        for( int i=0; i<input.length(); i++ ) {
            ch = input.charat(i);
            if( ch == < ) {
                buf.append( "<" );
            }
            else if( ch == > ) {
                buf.append( ">" );
            }
            else {
                buf.append( ch );
            }
        }
        return buf.tostring();
    }