1. /**
    2.  * @author Cheng JiYe
    3.  * @date 2020/3/17 18:04
    4.  */
    5. public class StringUtils extends org.apache.commons.lang3.StringUtils {
    6.     /**
    7.      * 是否为null或空字符串
    8.      *
    9.      * @param val
    10.      * @return
    11.      */
    12.     public static boolean isBlank(Object val) {
    13.         if (val == null) {
    14.             return true;
    15.         } else if (val instanceof String) {
    16.             return isBlank(val.toString());
    17.         }
    19.         return false;
    20.     }
    22.     /**
    23.      * 是否不为null或空字符串
    24.      *
    25.      * @param val
    26.      * @return
    27.      */
    28.     public static boolean isNotBlank(Object val) {
    29.         return !isBlank(val);
    30.     }
    32.     /**
    33.      * 默认字符串
    34.      *
    35.      * @param val
    36.      * @return
    37.      */
    38.     public static String defaultString(Object val) {
    39.         return val == null ? "" : val.toString();
    40.     }
    42.     /**
    43.      * 字符串转ASCII
    44.      *
    45.      * @param value
    46.      * @return
    47.      */
    48.     public static String stringToAscii(String value) {
    49.         StringBuffer sbu = new StringBuffer();
    50.         char[] chars = value.toCharArray();
    51.         for (int i = 0; i < chars.length; i++) {
    52.             if (i != chars.length - 1) {
    53.                 sbu.append((int) chars[i]).append(",");
    54.             } else {
    55.                 sbu.append((int) chars[i]);
    56.             }
    57.         }
    58.         return sbu.toString();
    59.     }
    61.     /**
    62.      * 默认字符串
    63.      *
    64.      * @param val
    65.      * @return
    66.      */
    67.     public static String defaultStringNull(Object val) {
    68.         return val == null ? null : val.toString();
    69.     }
    71.     /**
    72.      * 左补齐
    73.      * @param str 待补齐字符串
    74.      * @param padStr 用于补齐的字符串
    75.      * @param len 总长度
    76.      * @return
    77.      */
    78.     public static String lpadStr(String str, String padStr, int len){
    79.         while(str.length() < len){
    80.             str = padStr + str;
    81.         }
    82.         return str;
    83.     }
    85. }