package com.nanjing.water.common.util;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class EncryptionUtil {
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public static String encryptString(String input) {
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try {
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// 将传入的字符串转换为字节数组
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byte[] inputBytes = input.getBytes(StandardCharsets.UTF_8);
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// 使用SHA-256进行加密
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MessageDigest digest = MessageDigest.getInstance("SHA-256");
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byte[] hashBytes = digest.digest(inputBytes);
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// 转换为十六进制字符串
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StringBuilder sb = new StringBuilder();
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for (byte b : hashBytes) {
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sb.append(String.format("%02x", b));
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}
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String hashedString = sb.toString();
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// 按照指定规则截取和重新组合字符串
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StringBuilder result = new StringBuilder();
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for (int i = 0; i < 4; i++) {
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String subString = hashedString.substring(i * 16, (i + 1) * 16);
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for (int j = 0; j < 4; j++) {
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result.append(subString.charAt(j * 4 + j));
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}
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}
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return result.toString();
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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return null;
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}
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}
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// public static void main(String[] args) {
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// String input = "#beiaisi#_000001"; // 传入的字符串
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//
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// // 调用加密方法
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// String encryptedString = encryptString(input);
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// System.out.println(encryptedString);
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// }
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}
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