29 lines
817 B
Java
29 lines
817 B
Java
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package com.fuyuanshen.web.util;
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import org.apache.commons.codec.digest.DigestUtils;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.IOException;
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import java.io.InputStream;
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import java.security.MessageDigest;
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import java.util.HexFormat;
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/**
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* 文件哈希工具类
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*/
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public class FileHashUtil {
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private static final String ALGORITHM = "SHA-256";
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public static String hash(MultipartFile file) throws IOException {
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MessageDigest digest = DigestUtils.getDigest(ALGORITHM);
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try (InputStream in = file.getInputStream()) {
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byte[] buf = new byte[8192];
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int len;
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while ((len = in.read(buf)) != -1) {
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digest.update(buf, 0, len);
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}
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}
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return HexFormat.of().formatHex(digest.digest());
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}
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}
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