转译特殊符号标签

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/**
* DealingCharacter.java
* Description:
* @author li.b
* @version 2.0
* Jun 27, 2008
*/
public class DealingCharacter {

    /**
     * Description: 转译特殊符号标签
     * @param value 需要处理的字符串
     * @return
     */
     public static String filter(String value)
        {
            if(value == null || value.length() == 0)
                return value;
            StringBuffer result = null;
            String filtered = null;
            for(int i = 0; i < value.length(); i++)
            {
                filtered = null;
                switch(value.charAt(i))
                {
                case 60: // '<'
                    filtered = "<";
                    break;

                case 62: // '>'
                    filtered = ">";
                    break;

                case 38: // '&'
                    filtered = "&";
                    break;

                case 34: // '"'
                    filtered = """;
                    break;

                case 39: // '/''
                    filtered = "'";
                    break;
                }
                if(result == null)
                {
                    if(filtered != null)
                    {
                        result = new StringBuffer(value.length() + 50);
                        if(i > 0)
                            result.append(value.substring(0, i));
                        result.append(filtered);
                    }
                } else
                if(filtered == null)
                    result.append(value.charAt(i));
                else
                    result.append(filtered);
            }

return result != null ? result.toString() : value;
}

     public static void main(String[] args) {
         System.out.println(DealingCharacter.filter("<HTML>sdfasfas</HTML>"));
    }
}