解决乱码的问题的最好方法

/**
 * 转码方法
 * @param req 请求
 * @param key 传来的字符串
 * @return
 */
    public static String getParameter(HttpServletRequest req, String key)
    {
     String s = req.getParameter(key);
        if (s == null)
            return null;
        else {
            String Encoding = req.getCharacterEncoding();
            if (Encoding == null ||req.getMethod().equals("GET")) {
                try {
                    req.setCharacterEncoding("ISO8859-1");
                } catch (Exception ex) {
                }
            }
            Encoding = req.getCharacterEncoding();
            if (Encoding != null && Encoding.trim().equals("ISO8859-1")) {
                return convertToAvoidGarbage(s.trim());
            } else {
                return s.trim();
            }
        }
    }
    /**
     * 转码方法2
     * @param req 请求
     * @param key 传来的字符串
     * @return
     */
    public static String getStringParameter2(HttpServletRequest req, String key) {
        String s = req.getParameter(key);
        if (s == null) {
            return null;
        } else {
            String Encoding = req.getCharacterEncoding();
            return convertToAvoidGarbage(s.trim());
            // return s.trim();
        }
    }
    public static String convertToAvoidGarbage(String moto) {
        String moto2 = null;
        try {
            moto2 = new String(moto.getBytes("ISO8859-1"), "GBK");
        } catch (Exception e) {

        }

        return moto2;
    }

调用getParameter或getStringParameter2就能在struts里解决所有乱码问题!!!