| 68 | } |
| 69 | |
| 70 | public static String escapeHTML(String s) { |
| 71 | if ( s==null ) { |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | StringBuilder buf = new StringBuilder(s.length()); |
| 76 | int len = s.length(); |
| 77 | for (int i = 0; i < len; i++) { |
| 78 | char c = s.charAt(i); |
| 79 | switch ( c ) { |
| 80 | case '&' : buf.append("&"); |
| 81 | break; |
| 82 | case '<' : buf.append("<"); |
| 83 | break; |
| 84 | case '>' : buf.append(">"); |
| 85 | break; |
| 86 | case '\r' : case '\n' : case '\t' : buf.append(c); |
| 87 | break; |
| 88 | default: |
| 89 | boolean control = c<' '; // 32 |
| 90 | boolean aboveASCII = c>126; |
| 91 | if ( control || aboveASCII ) { |
| 92 | buf.append("&#"); |
| 93 | buf.append((int)c); |
| 94 | buf.append(";"); |
| 95 | } |
| 96 | else buf.append(c); |
| 97 | } |
| 98 | } |
| 99 | return buf.toString(); |
| 100 | } |
| 101 | } |