如何将字符串转换成hash值，实现长尾词效果？

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需求：将中文字符串转换为对应的hash值

代码：javapackage util;

import java.nio.charset.StandardCharsets;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;

/** * @Author: ZD * @Date: 2023/8/29 */public class Hash { public static String getHash(String text) { try { MessageDigest digest=MessageDigest.getInstance(SHA-256); byte[] encodedhash=digest.digest(text.getBytes(StandardCharsets.UTF_8)); StringBuilder hexString=new StringBuilder(2 * encodedhash.length); for (int i=0; i

需求：将中文字符串转为对应的hash值

package util; import java.nio.charset.StandardCharsets; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; /** * @Author: ZD * @Date: 2023/8/29 */ public class HashUtil { public static long chineseSentenceToHash(String sentence) throws NoSuchAlgorithmException { // 将中文语句编码为字节序列 byte[] encodedBytes = sentence.getBytes(StandardCharsets.UTF_8); // 创建SHA-256哈希算法实例 MessageDigest digest = MessageDigest.getInstance("SHA-256"); // 计算哈希值 byte[] hashBytes = digest.digest(encodedBytes); // 将哈希值转换为长整型 long hashValue = byteArrayToLong(hashBytes); return hashValue; } private static long byteArrayToLong(byte[] bytes) { long value = 0; for (int i = 0; i < 8 && i < bytes.length; i++) { value |= ((long) (bytes[i] & 0xFF)) << (8 * i); } return value; } public static void main(String[] args) throws NoSuchAlgorithmException { String chineseSentence = ""; long hashValue = chineseSentenceToHash(chineseSentence); System.out.println(hashValue); } }