/**
     * 判断汉字的长度
     * @param str
     * @return
     */
    public static int stringLength(String str) {
        int stringLength = 0;
        try {
            if (str != null && !str.equals("")) {
                stringLength = str.getBytes("GB18030").length;
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return stringLength;
    }

public static String addStrLength(String str,Integer strLength){
        if(str != null){
            Integer nowLength = str.length();
            Integer total;
            for(int i = 0; i<strLength; i++){
                str = str + " ";
                total = stringLength(str);
                if(total.equals(strLength)){
                    break;
                }
            }
            return str;
        }else {
            str = "";
            for (int i=0;i<strLength;i++){
                str = str+" ";
            }
            return str;
        }
    }