字符串转换....

/**
* 字符串编码器类，将字符串转换为指定格式.<br>
* <br>
* 参数字典:<br>
* src - source     来源的简写<br>
* dst - destnation 目的的简写<br>
* fnd - find       查找的简写<br>
* rep - replace    替换的简写<br>
* idx - index      索引，下标的简写<br>
* enc - encoding   编码的简写<br>
* <br>
* 例子:<br>
* <%=ArticleFormat.htmlTextEncoder(yourString)%>
*/
public class StringEncoder
{
    /**
     * 将字符串src中的子字符串fnd全部替换为新子字符串rep.<br>
     * 功能相当于java sdk 1.4的String.replaceAll方法.<br>
     * 不同之处在于查找时不是使用正则表达式而是普通字符串.
     */
    public static String replaceAll(String src, String fnd, String rep) throws Exception
    {
        if (src == null || src.equals(""))
        {
            return "";
        }
       
        String dst = src;
       
        int idx = dst.indexOf(fnd);
       
        while (idx >= 0)
        {
            dst = dst.substring(0, idx) + rep + dst.substring(idx + fnd.length(), dst.length());
            idx = dst.indexOf(fnd, idx + rep.length());
        }
       
        return dst;
    }

    /**
     * 转换为HTML编码.<br>
     */
    public static String htmlEncoder(String src) throws Exception
    {
        if (src == null || src.equals(""))
        {
            return "";
        }
       
        String dst = src;
        dst = replaceAll(dst, "<",    "&lt;");
        dst = replaceAll(dst, ">",    "&rt;");
        dst = replaceAll(dst, "/"",   "&quot;");
        dst = replaceAll(dst, "'",    "&#039;");
        dst = replaceAll(dst, " ",    "&nbsp;");
        dst = replaceAll(dst, "/r/n", "<br>");
        dst = replaceAll(dst, "/r",   "<br>");
        dst = replaceAll(dst, "/n",   "<br>");
       
        return dst;
    }


    /**
     * 转换为XML编码.<br>
     */
    public static String xmlEncoder(String src) throws Exception
    {
        if (src == null || src.equals(""))
        {
            return "";
        }
       
        String dst = src;
        dst = replaceAll(dst, "&",  "&amp;");
        dst = replaceAll(dst, "<",  "&lt;");
        dst = replaceAll(dst, ">",  "&gt;");
        dst = replaceAll(dst, "/"", "&quot;");
        dst = replaceAll(dst, "/'", "&acute;");
       
        return dst;
    }
}