自己对html字符串转义

[url]http://lxs647.iteye.com/blog/800722[/url]

public static String htmlEncode(String source) {
    if (source == null) {
      return "";
    }
    String html = "";
    StringBuffer buffer = new StringBuffer();
    for (int i = 0; i < source.length(); i++) {
      char c = source.charAt(i);
      switch (c) {
      case '<':
        buffer.append("<");
        break;
      case '>':
        buffer.append(">");
        break;
      case '&':
        buffer.append("&");
        break;
      case '"':
        buffer.append(""");
        break;
      case ' ':
        buffer.append(" ");
        break;
      case 9:
        buffer.append("     ");
        break;
      case 10:
      case 13:
        break;
      default:
        buffer.append(c);
      }
    }
    html = buffer.toString();
    return html;
  }