Additional: information desensitization;

explain ：

（1） Why did you write this blog ？：

          ●  stay 【26： The third chapter ： Developing a pass service ：9】 in , We added AppUser Data time , When setting user nicknames , Write an information desensitization tool DesensitizationUtil Tool class ;（ You can put 【 user [phone]】 Turn into 【 user +18******888】 In the form of ）;

          ●  This blog will introduce the information desensitization tool DesensitizationUtil;

（2） Actually , This blog is mainly to clarify two points ：

          ●  For the project , Some need to be displayed on the front desk , But at the same time, I don't want to divulge secrets , Consider information desensitization ;

          ●  then , This blog , It's just a case of information desensitization ; For other projects , Although there is a need for information desensitization , But this demand is different （ For example, some require 18888888888 Turn into 18***888***; Some require 18888888888 Turn into 18######888; Some asked to turn Li Erzhu into Li * Column, etc ）

（3） in the future , In other projects , Encounter specific information desensitization needs , Then according to the actual situation , Write specific 、 Just solve it with appropriate logic ;

Catalog

One ： stay 【26： The third chapter ： Developing a pass service ：9】 in ,DesensitizationUtil Content of tool class ;

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One ： stay 【26： The third chapter ： Developing a pass service ：9】 in ,DesensitizationUtil Content of tool class ;

package com.imooc.utils;

/**
 *  General desensitization tool class 
 *  Can be used for ：
 *       user name 
 *       cell-phone number 
 *       mailbox 
 *       Address, etc 
 */
public class DesensitizationUtil {

    private static final int SIZE = 6;
    private static final String SYMBOL = "*";

    public static void main(String[] args) {
        String name = commonDisplay(" For class network ");
        String mobile = commonDisplay("13900000000");
        String mail = commonDisplay("[email protected]");
        String address = commonDisplay(" Beijing Grand Canal East Road 888 Number ");

        System.out.println(name);
        System.out.println(mobile);
        System.out.println(mail);
        System.out.println(address);
    }

    /**
     *  General desensitization method 
     * @param value
     * @return
     */
    public static String commonDisplay(String value) {
        if (null == value || "".equals(value)) {
            return value;
        }
        int len = value.length();
        int pamaone = len / 2;
        int pamatwo = pamaone - 1;
        int pamathree = len % 2;
        StringBuilder stringBuilder = new StringBuilder();
        if (len <= 2) {
            if (pamathree == 1) {
                return SYMBOL;
            }
            stringBuilder.append(SYMBOL);
            stringBuilder.append(value.charAt(len - 1));
        } else {
            if (pamatwo <= 0) {
                stringBuilder.append(value.substring(0, 1));
                stringBuilder.append(SYMBOL);
                stringBuilder.append(value.substring(len - 1, len));

            } else if (pamatwo >= SIZE / 2 && SIZE + 1 != len) {
                int pamafive = (len - SIZE) / 2;
                stringBuilder.append(value.substring(0, pamafive));
                for (int i = 0; i < SIZE; i++) {
                    stringBuilder.append(SYMBOL);
                }
                if ((pamathree == 0 && SIZE / 2 == 0) || (pamathree != 0 && SIZE % 2 != 0)) {
                    stringBuilder.append(value.substring(len - pamafive, len));
                } else {
                    stringBuilder.append(value.substring(len - (pamafive + 1), len));
                }
            } else {
                int pamafour = len - 2;
                stringBuilder.append(value.substring(0, 1));
                for (int i = 0; i < pamafour; i++) {
                    stringBuilder.append(SYMBOL);
                }
                stringBuilder.append(value.substring(len - 1, len));
            }
        }
        return stringBuilder.toString();
    }

}

explain ：

（1） This code , I didn't look carefully ; But I glanced a little , The basic idea is ： After considering all abnormal conditions , hold 18888888888 Turn into 18******888;