package org.ruoyi.system.util;
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public class DesensitizationUtil {
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public static String maskData(String data) {
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if (data == null || data.length() <= 4) {
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return data;
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}
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int start = 2;
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int end = data.length() - 2;
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StringBuilder masked = new StringBuilder();
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masked.append(data, 0, start);
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for (int i = start; i < end; i++) {
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masked.append('*');
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}
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masked.append(data.substring(end));
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return masked.toString();
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}
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}
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