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This article shows you how to use a three-dimensional array to achieve weak password verification keyboard, concise and easy to understand, absolutely can make your eyes shine, through the detailed introduction of this article I hope you can gain something.

A keyboard weak password simple verification implementation, in which the logic of three consecutive character verification is to first obtain the current character positioning index, through the index +-1 to obtain the next character and the next character and the next two characters in the string to compare.

package com.linya.common.util;

import java.util.Arrays; import java.util.HashSet; import java.util.List; import java.util.Set;

import cn.hutool.core.util.ChatUtil;

/**

@author Linya Luichuan

@Description Keyboard Password Complexity Verification Tool

@create 2021-03-16 15:21 */

public class TextValidUtil {

private static char[][][] KEYBOARD = new char[5][15][2];static { KEYBOARD[0][0][0] = '`';KEYBOARD[0][0][1] = '~';KEYBOARD[1][1][0] = 'q';KEYBOARD[1][1][1] = 'Q'; KEYBOARD[0][1][0] = '1';KEYBOARD[0][1][1] = '! ';KEYBOARD[1][2][0] = 'w';KEYBOARD[1][2][1] = 'W'; KEYBOARD[0][2][0] = '2';KEYBOARD[0][2][1] = '@';KEYBOARD[1][3][0] = 'e';KEYBOARD[1][3][1] = 'E'; KEYBOARD[0][3][0] = '3';KEYBOARD[0][3][1] = '#';KEYBOARD[1][4][0] = 'r';KEYBOARD[1][4][1] = 'R'; KEYBOARD[0][4][0] = '4';KEYBOARD[0][4][1] = '$';KEYBOARD[1][5][0] = 't';KEYBOARD[1][5][1] = 'T'; KEYBOARD[0][5][0] = '5';KEYBOARD[0][5][1] = '%';KEYBOARD[1][6][0] = 'y';KEYBOARD[1][6][1] = 'Y'; KEYBOARD[0][6][0] = '6';KEYBOARD[0][6][1] = '^';KEYBOARD[1][7][0] = 'u';KEYBOARD[1][7][1] = 'U'; KEYBOARD[0][7][0] = '7';KEYBOARD[0][7][1] = '&';KEYBOARD[1][8][0] = 'i';KEYBOARD[1][8][1] = 'I'; KEYBOARD[0][8][0] = '8';KEYBOARD[0][8][1] = '*';KEYBOARD[1][9][0] = 'o';KEYBOARD[1][9][1] = 'O'; KEYBOARD[0][9][0] = '9';KEYBOARD[0][9][1] = '(';KEYBOARD[1][10][0] = 'p';KEYBOARD[1][10][1] = 'P'; KEYBOARD[0][10][0] = '0';KEYBOARD[0][10][1] = ')';KEYBOARD[1][11][0] = '[';KEYBOARD[1][11][1] = '{'; KEYBOARD[0][11][0] = '-';KEYBOARD[0][11][1] = '_';KEYBOARD[1][12][0] = ']';KEYBOARD[1][12][1] = '}'; KEYBOARD[0][12][0] = '=';KEYBOARD[0][12][1] = '+';KEYBOARD[1][13][0] = '\\';KEYBOARD[1][13][1] = '|'; KEYBOARD[2][1][0] = 'a';KEYBOARD[2][1][1] = 'A';KEYBOARD[3][1][0] = 'z';KEYBOARD[3][1][1] = 'Z'; KEYBOARD[2][2][0] = 's';KEYBOARD[2][2][1] = 'S';KEYBOARD[3][2][0] = 'x';KEYBOARD[3][2][1] = 'X'; KEYBOARD[2][3][0] = 'd';KEYBOARD[2][3][1] = 'D';KEYBOARD[3][3][0] = 'c';KEYBOARD[3][3][1] = 'C'; KEYBOARD[2][4][0] = 'f';KEYBOARD[2][4][1] = 'F';KEYBOARD[3][4][0] = 'v';KEYBOARD[3][4][1] = 'V'; KEYBOARD[2][5][0] = 'g';KEYBOARD[2][5][1] = 'G';KEYBOARD[3][5][0] = 'b';KEYBOARD[3][5][1] = 'B'; KEYBOARD[2][6][0] = 'h';KEYBOARD[2][6][1] = 'H';KEYBOARD[3][6][0] = 'n';KEYBOARD[3][6][1] = 'N'; KEYBOARD[2][7][0] = 'j';KEYBOARD[2][7][1] = 'J';KEYBOARD[3][7][0] = 'm';KEYBOARD[3][7][1] = 'M'; KEYBOARD[2][8][0] = 'k';KEYBOARD[2][8][1] = 'K';KEYBOARD[3][8][0] = ',';KEYBOARD[3][8][1] = ''; KEYBOARD[2][10][0] = ';';KEYBOARD[2][10][1] = ':';KEYBOARD[3][10][0] = '/';KEYBOARD[3][10][1] = '? '; KEYBOARD[2][11][0] = '\'';KEYBOARD[2][11][1] = '"'; KEYBOARD[4][14][0] = ' ';}private static List EXCLUDED_WORD = Arrays.asList("admin", "root");private final static int MIN_SIZE = 8;private final static int MAX_SIZE = 32;/** * [@param](https://my.oschina.net/u/2303379) account * [@param](https://my.oschina.net/u/2303379) passWord * @return * @ weak password check * @rule * a. Description Minimum 8 bits, maximum 32 bits * b. Uppercase, lowercase, numeric, special characters, at least three * c. It is not allowed to appear more than 3 characters of the same character and not allowed to appear more than 3 consecutive characters in the same direction adjacent to the keyboard * d. Password containing full account name * e. Common words such as admin, root, etc. */are not allowed

public static boolean isWeakPassWord(String account, String passWord) {

//Length check if (passWord.length()

< 8 || passWord.length() >

32) return true; //Common word check if (EXCLUDED_WORD.contains(passWord)) return true; //name check if (account != null && passWord.contains(account)) return true; // 3 characters and character type check if (isThirdCharsRule(passWord)) return true; return false;}/** * @param characters * @return * @rule * 1. Character types are not less than 3 * 2. Check for consecutive 3 characters * 3. Check for keyboard proximity to 3 characters */private static boolean isThirdCharsRule(String characters) { char[] chars = characters.toCharArray(); Set type = new HashSet(); for (int i = chars.length - 1; i >= 2; i--) { if (chars[i] == chars[i - 1] && chars[i - 1] == chars[i - 2]) return true; int[] firstIndex = getIndex(chars[i]); if (isThirdCharByIndex(firstIndex, chars[i - 1], chars[i - 2])) return true; saveCharType(chars[i], type); } saveCharType(chars[0], type); saveCharType(chars[1], type); if (type.size()

< 3) return true; return false;}private static int[] getIndex(char cha) { int[] index = new int[3]; for (int i = 0; i < KEYBOARD.length; i++) { for (int j = 0; j < KEYBOARD[i].length; j++) { for (int k = 0; k < KEYBOARD[i][j].length; k++) { if (KEYBOARD[i][j][k] == cha) { index[0] = i; index[1] = j; index[2] = k; return index; } } } } throw new RuntimeException("exist unrecognized character:" + cha);}private static boolean isThirdCharByIndex(int[] index, char secondChar, char thirdChar) { if (orientedCheck(index, index[0], 1, 0, 0, KEYBOARD.length, secondChar, thirdChar)) return true; if (orientedCheck(index, index[1], 0, 1, 0, KEYBOARD[0].length, secondChar, thirdChar)) return true; if (orientedCheck(index, index[2], 0, 0, 1, KEYBOARD[0][0].length, secondChar, thirdChar)) return true; return false;}private static boolean orientedCheck(int[] index, int validIndex, int first, int second, int third, int size, char secondChar, char thirdChar) { if (validIndex + 2 < size) if (nearCharCompare(index, first, second, third, secondChar, thirdChar)) return true; if (validIndex - 1 >

0) if (nearCharCompare(index, -first, -second, -third, secondChar, thirdChar)) return true; return false;}private static boolean nearCharCompare(int[] index, int first, int second, int third, char secondChar, char thirdChar) { if (KEYBOARD[index[0] + first][index[1] + second][index[2] + third] == secondChar && KEYBOARD[index[0] + first * 2][index[1] + second * 2][index[2] + third * 2] == thirdChar) return true; return false;}private static void saveCharType(char cha, Set type){ if (CharUtil.isLetterLower(cha)) type.add(1); else if (CharUtil.isLetterUpper(cha)) type.add(2); else if (CharUtil.isNumber(cha)) type.add(3); else type.add(4);}public static void main(String[] args) { String account = "admin"; String passWord = "1qrfw3j6tesedex@0!?|

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