1、字符脱敏工具类

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;/*** 数据脱敏工具类** @date 2024/10/30 13:44*/@Slf4j
public class DataDesensitizationUtils {public static final String STAR_1 = "*";public static final String STAR_2 = "**";public static final String STAR_3 = "***";public static final String STAR_4 = "****";/*** 手机号脱敏** @param mobile 手机号* @return 返回值*/public static String mobileDesensitize(String mobile) {// 如果手机号为空则返回空字符串if (StringUtils.isBlank(mobile)) {return "";}// 取手机号最后4位String right = StringUtils.right(mobile, 4);// 手机号除了最后4位都用*代替String leftPad = StringUtils.leftPad(right, StringUtils.length(mobile), STAR_1);// 移除前面默认的三位*String removeStart = StringUtils.removeStart(leftPad, STAR_3);// 取手机号前3位String left = StringUtils.left(mobile, 3);// 字符串链接并返回return left.concat(removeStart);}/*** 姓名脱敏** @param name 姓名* @return 返回值*/public static String nameDesensitize(String name) {// 名字为空则返回空字符串if (StringUtils.isBlank(name)) {return "";}// 名字长度小于等于3个字符，则将前面一个字符用*代替int length = 3;if (name.length() <= length) {int len = name.length() - 1;String right = StringUtils.right(name, len);return STAR_1.concat(right);}// 名字长度大于3个字符，则将前两个字符用*代替int len = name.length() - 2;String right = StringUtils.right(name, len);return STAR_2.concat(right);}/*** 地址脱敏** @param detailAddress 地址* @return 返回值*/public static String detailAddressDesensitize(String detailAddress) {int length = 10;String desensitizationText = STAR_4;// 地址为空或长度小于10个字符则默认返回*if (StringUtils.isBlank(detailAddress) || detailAddress.length() <= length) {return desensitizationText;} else {// 把地址10个字符后的所有字符替换为*StringBuilder address = new StringBuilder(detailAddress);int start = address.length() - 10;int end = address.length();return address.replace(start, end, desensitizationText).toString();}}/*** 对指定字符串的部分内容进行脱敏处理，替换为指定数量的星号。** @param start       需要脱敏的起始位置（包含）* @param end         需要脱敏的结束位置（不包含）* @param content     原始字符串* @param maxStarSize 最大星号数量，超出部分将被截断* @return 处理后的字符串*/public static String contentDesensitize(int start, int end, String content, int maxStarSize) {// 字符串为空则返回空字符串if (StringUtils.isBlank(content)) {return "";}// 起始位置不能小于0start = Math.max(0, start);// 结束位置不能大于字符串最大长度end = Math.min(content.length(), end);// 如果结束位置小于起始位置或者结束位置大于原始串长度，则返回原始串。if (end < start) {return content;}// 取两者最小值，即中间最多出现maxStarSize个*号int min = Math.min(end - start, maxStarSize);// 取两者最大值作为重复次数，即保证*号重复次数不为负数int count = Math.max(0, min);// 计算count次数的*号字符串，repeat是JDK11+提供的方法// JDK8可以使用以下方法 // String repeat = StringUtils.repeat(STAR_1, count);String repeat = STAR_1.repeat(count);// 将字符串start与end中间的明文替换为*号return new StringBuilder(content).replace(start, end, repeat).toString();}/*** 对指定字符串的部分内容进行脱敏处理，替换为指定数量的星号。** @param start   需要脱敏的起始位置（包含）* @param end     需要脱敏的结束位置（不包含）* @param content 原始字符串* @return 处理后的字符串*/public static String contentDesensitize(int start, int end, String content) {// 默认最大*号数量即中间替换字符数量return contentDesensitize(start, end, content, end - start);}}

2、测试工具类

@Slf4j
@ExtendWith(MockitoExtension.class)
public class DataDesensitizationUtilsTest {@Testpublic void testMobileDesensitize() {String mobile = "13011112222";String result = DataDesensitizationUtils.mobileDesensitize(mobile);log.info("手机号脱敏结果：{}", result);}@Testpublic void testNameDesensitize() {String name = "诸葛孔明";String result = DataDesensitizationUtils.nameDesensitize(name);log.info("姓名脱敏结果：{}", result);}@Testpublic void testAddressDesensitize() {String address = "北京首钢国际会展中心9号馆、10号馆";String result = DataDesensitizationUtils.detailAddressDesensitize(address);log.info("地址脱敏结果：{}", result);}@Testpublic void testStringUtils() {String param = "北京首钢国际会展中心9号馆、10号馆";String result1 = StringUtils.left(param, 3);log.info("处理结果1：{}", result1);String result2 = StringUtils.right(param, 4);log.info("处理结果2：{}", result2);String result3 = StringUtils.leftPad(result2, param.length(), "*");log.info("处理结果3：{}", result3);}@Testpublic void testContentDesensitize() {String param = "诸葛孔明";String result1 = DataDesensitizationUtils.contentDesensitize(1, 7, param);log.info("处理结果1：{}", result1);String result2 = DataDesensitizationUtils.contentDesensitize(1, param.length() - 7, param, 6);log.info("处理结果2：{}", result2);String result3 = DataDesensitizationUtils.contentDesensitize(0, param.length() + 7, param, 6);log.info("处理结果3：{}", result3);}}

3、测试结果：

2024-10-31 09:36:11 [INFO ] [main] - [] - com.summer.toolkit.service.DataDesensitizationUtilsTest.testNameDesensitize():30 - 姓名脱敏结果：**孔明
2024-10-31 09:36:11 [INFO ] [main] - [] - com.summer.toolkit.service.DataDesensitizationUtilsTest.testMobileDesensitize():23 - 手机号脱敏结果：130****2222
2024-10-31 09:36:11 [INFO ] [main] - [] - com.summer.toolkit.service.DataDesensitizationUtilsTest.testAddressDesensitize():37 - 地址脱敏结果：北京首钢国际会展****
2024-10-31 09:36:11 [INFO ] [main] - [] - com.summer.toolkit.service.DataDesensitizationUtilsTest.testStringUtils():44 - 处理结果1：北京首
2024-10-31 09:36:11 [INFO ] [main] - [] - com.summer.toolkit.service.DataDesensitizationUtilsTest.testStringUtils():47 - 处理结果2：10号馆
2024-10-31 09:36:11 [INFO ] [main] - [] - com.summer.toolkit.service.DataDesensitizationUtilsTest.testStringUtils():50 - 处理结果3：**************10号馆