HttpServletRequestWrapper 编码问题

当发现经过Wrapper后Spring setCharacterEncoding还乱码时，可以实现HttpServletRequestWrapper，重写public String[] getParameterValues(String name) {....}等方法，再Encoding已设了encoding.

/**
     * 获取应用层的编码方式，应用层Filter需要setCharacterEncoding避免乱码问题
     * 当getCharacterEncoding不为空那么就可以从RequestWrapper中获取转换编码
     * 后的字符串了
     * @param request
     * @return
     */
    public static String getCharacterEncoding(HttpServletRequest request){
        String encoding = request.getCharacterEncoding();
        return encoding != null ? encoding : "ISO8859-1";
    }
    /**
     * 避免Filter乱码问题，默认ISO8859-1,如果应用层setCharacterEncoding需要取出
     * setCharacterEncoding的编码方式
     * @param obj
     * @param encoding
     * @return
     */
    public static String[] encoding(String[] obj,String encoding){
        if (StringUtil.isNotEmpty(obj)) {
            if(!encoding.equalsIgnoreCase("ISO8859-1")){
                try {
                    if (obj.length > 1) {
                        List<String> ls = Arrays.asList((String[]) obj);
                        String[] str = new String[ls.size()];
                        for (int i = 0; i < ls.size(); i++) {
                            str[i] = new String(ls.get(i).getBytes("ISO8859-1"),encoding);
                        }
                        return str;
                    } else {
                        return new String[] {new String(obj[0].getBytes("ISO8859-1"),encoding) };
                    }
                } catch (UnsupportedEncodingException e) {
                    logger.info(e.toString());
                }
            }else{
                return obj;
            }
        }
        return null;
    }