java实现姓名、手机号和银行卡中间用*号代替

偏执的太偏执、 2022-05-21 07:49 394阅读 0赞

package com.util.date;
    
    
    /**
     * @Description 模拟各大网站充值时的数据显示
     * @author ShengLiu
     * @date 2018/7/4
     */
    public class TestUtil {
    
        /**
         * 定义所有常量
         */
        public static final String EMPTY = "";
        public static final int ZERO = 0;
        public static final int ONE = 1;
        public static final int TWO = 2;
        public static final int THREE = 3;
        public static final int FOUR = 4;
    
        /**
         * @Description 字符串向左截取
         * @author ShengLiu
         * @date 2018/7/4
         * @param str
         * @param len
         * @return java.lang.String
         */
        public static String left(String str, int len) {
            if (str == null) {
                return null;
            }
            if (len < ZERO) {
                return EMPTY;
            }
            if (str.length() <= len) {
                return str;
            }
            return str.substring(ZERO, len);
    
        }
    
        /**
         * @Description 字符串向右截取
         * @author ShengLiu
         * @date 2018/7/4
         * @param str
         * @param len
         * @return java.lang.String
         */
        public static String right(String str, int len) {
            if (str == null) {
                return null;
            }
            if (len < ZERO) {
                return EMPTY;
            }
            if (str.length() <= len) {
                return str;
            }
            return str.substring(str.length() - len);
    
        }
    
        /**
         * @Description 根据不同名字的长度返回不同的显示数据
         * @author ShengLiu
         * @date 2018/7/4
         * @param str
         * @return java.lang.String
         */
        public static String checkNameLength(String str){
            if(str == null){
                return null;
            }
            if(str.length() == ONE) {
                return str;
            }else if(str.length() == TWO){
                return "*" + TestUtil.right(str, ONE);
            }else if(str.length() == THREE){
                return TestUtil.left(str, ONE) + "*" + TestUtil.right(str, ONE);
            }else if(str.length() == FOUR){
                return TestUtil.left(str, ONE) + "**" + TestUtil.right(str, ONE);
            }
            return str;
        }
    
        /**
         * 测试
         */
        public static void main(String[] args) {
            System.out.println("名字: " + TestUtil.checkNameLength("海"));
            System.out.println("名字: " + TestUtil.checkNameLength("贼王"));
            System.out.println("名字: " + TestUtil.checkNameLength("海贼王"));
            System.out.println("名字: " + TestUtil.checkNameLength("大海贼王"));
            System.out.println("手机号: " + TestUtil.left("15838883888", THREE) + "*****" + TestUtil.right("15838883888", FOUR));
            System.out.println("信用卡号16位: " + TestUtil.left("1234567891011121", FOUR) + "*****" + TestUtil.right("1234567891011121", FOUR));
            System.out.println("银行卡号19位: " + TestUtil.left("1234567891011121314", FOUR) + "*****" + TestUtil.right("1234567891011121314", FOUR));
        }
    
    }

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[70]: /images/20220521/33f84d1fd01e47639d7b03c37dc341e0.png