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wzjs 2025/9/18 19:24:03

福安做网站最好,手机网站制作报价,成都好的网站建设公司,郑州网站建设修改生成随机密码符合密码强度的密码要求： 至少有一个大写字母至少有一个小写字母至少有一个数字至少有一个特殊字符长度满足要求（通常为8-16位） // 大写字母private static final String UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ";…

生成随机密码

符合密码强度的密码要求：

至少有一个大写字母
至少有一个小写字母
至少有一个数字
至少有一个特殊字符
长度满足要求（通常为8-16位）

    // 大写字母private static final String UPPERCASE = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";// 小写字母private static final String LOWERCASE = "abcdefghijklmnopqrstuvwxyz";// 数字private static final String DIGITS = "0123456789";// 特殊字符(支持空格-下发密码明文时需要关注空格)private static final String SPECIAL_CHARS = "`~!@#$%^&*()-_=+[]{}\\|;:'\",.<>/? ";// 最小长度private static final int MIN_LENGTH = 8;// 最大长度private static final int MAX_LENGTH = 16;private static final SecureRandom random = new SecureRandom();/*** 生成随机密码* 满足强度要求* 长度随机** @return 生成的密码*/public static String generatePassword() {int length = MIN_LENGTH + random.nextInt(MAX_LENGTH - MIN_LENGTH);return generatePassword(length);}/*** 生成符合强密码要求的随机密码** @param length 密码长度* @return 生成的密码* @throws IllegalArgumentException 长度不满足要求*/public static String generatePassword(int length) {if (length < MIN_LENGTH || length > MAX_LENGTH) {throw new IllegalArgumentException("invalid password length.");}List<Character> passwordChars = new ArrayList<>();// 确保每类字符至少出现一次addRandomChar(passwordChars, UPPERCASE);addRandomChar(passwordChars, LOWERCASE);addRandomChar(passwordChars, DIGITS);addRandomChar(passwordChars, SPECIAL_CHARS);// 填充剩余字符String allChars = UPPERCASE + LOWERCASE + DIGITS + SPECIAL_CHARS;for (int i = 4; i < length; i++) {addRandomChar(passwordChars, allChars);}// 打乱字符顺序Collections.shuffle(passwordChars, random);// 构建密码字符串StringBuilder password = new StringBuilder();for (char c : passwordChars) {password.append(c);}return password.toString();}/*** 从指定字符串中随机选取一个字符并添加到密码列表中*/private static void addRandomChar(List<Character> list, String charSet) {int index = random.nextInt(charSet.length());list.add(charSet.charAt(index));}

校验密码强度有效性

    // "^(?=.*[A-Z])(?=.*[a-z])(?=.*\\d)(?=.*[\\Q`~!@#$%^&*()-_=+[]{}\\|;:'\",.<>/? \\E]).{8,16}$"private static final Pattern PATTERN_VALID_PASSWORD = Pattern.compile("^" +"(?=.*[A-Z])" +"(?=.*[a-z])" +"(?=.*\\d)" +"(?=.*[" + Pattern.quote(SPECIAL_CHARS) + "])" +".{" + MIN_LENGTH + "," + MAX_LENGTH + "}"+ "$");/*** 判断密码强度是否满足要求* 长度为8-16位(可按照实际修改)* 必须包含大写字母，小写字母，数字，特殊字符** @param input 带验证的密码明文* @return 是否满足强度要求*/public static boolean isValid(String input) {if (input == null || input.isEmpty()) {return false;}return PATTERN_VALID_PASSWORD.matcher(input).matches();}

单元测试

package com.ysx.utils.security;import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.util.stream.Stream;import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;/*** @author youngbear* @email youngbear@aliyun.com* @date 2025-05-06 18:41* @blog <a href="https://blog.csdn.net/next_second">...</a>* @github <a href="https://github.com/YoungBear">...</a>* @description test for {@link PasswordUtils}*/
class PasswordUtilsTest {private static final Logger LOGGER = LoggerFactory.getLogger(PasswordUtilsTest.class);@Testvoid generatePasswordTestForRandomLength() {String password = PasswordUtils.generatePassword();LOGGER.info("password: {}, length: {}.", password, password.length());assertTrue(password.length() >= 8);assertTrue(password.length() <= 16);}@Testvoid generatePasswordTestForSpecifiedLength() {int length = 10;String password = PasswordUtils.generatePassword(length);LOGGER.info("password: {}, length: {}.", password, password.length());assertEquals(length, password.length());}private static Stream<String> validPasswordProvider() {return Stream.of("Abc@2025","2025~xyZ","(2020#Abc"," Abc2025","~!@#$%Aa0","2020$123$abc$ABC","Aa0`2025@2026^Xy");}private static Stream<String> inValidPasswordProvider() {return Stream.of(null,"","2025~xZ","2025~xZ12ab34CD56","(2020#abc","(2020#ABC","2020Abcd");}@ParameterizedTest(name = "#{index} - Run test with isValid = {0}")@MethodSource("validPasswordProvider")void test_isValid_input_valid(String input) {assertTrue(PasswordUtils.isValid(input));}@ParameterizedTest(name = "#{index} - Run test with isValid = {0}")@MethodSource("inValidPasswordProvider")void test_isValid_input_inValid(String input) {assertFalse(PasswordUtils.isValid(input));}
}