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本篇文章为大家展示了如何用三维数组实现键盘弱密码的校验，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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一个键盘弱密码简单校验实现，其中连续3个字符校验的逻辑是先获取当前字符定位下标，通过下标+-1获取下一个字符和下下个字符与字符串接下来的两个字符做比较。
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 临涯掠川
@Description 键盘密码复杂度校验工具
@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][9][0] = 'l';KEYBOARD[2][9][1] = 'L';KEYBOARD[3][9][0] = '.';KEYBOARD[3][9][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
* @Description 弱口令校验
* @rule
* a. 最小8位，最大32位
* b. 大写、小写、数字、特殊字符，至少包含三种
* c. 不允许出现3位以上相同的字符和不允许出现键盘相邻的同方向3位以上连续字符
* d. 不允许密码包含账号全称
* e. 不允许出现常见单词，如admin、root等
*/ public static boolean isWeakPassWord(String account, String passWord) {
// 长度校验
if (passWord.length() < 8 || passWord.length() > 32) return true;
// 常见单词校验
if (EXCLUDED_WORD.contains(passWord)) return true;
// 名称校验
if (account != null && passWord.contains(account)) return true;
// 3个字符和字符种类校验
if (isThirdCharsRule(passWord)) return true;
return false;
}
/**
* @param characters
* @return
* @rule
* 1.字符种类不少于3类
* 2.连续3个字符检查
* 3.键盘临近3个字符检查
*/
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!?|上述内容就是如何用三维数组实现键盘弱密码的校验，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注创新互联行业资讯频道。
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