84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
package com.example.mir4updater.utils;
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import java.io.File;
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import java.io.FileInputStream;
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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.security.NoSuchAlgorithmException;
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public class HashUtils {
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public static String getFileMD5(File file) throws NoSuchAlgorithmException, IOException {
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MessageDigest md = MessageDigest.getInstance("MD5");
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FileInputStream fis = new FileInputStream(file);
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byte[] dataBytes = new byte[1024];
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int bytesRead;
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while ((bytesRead = fis.read(dataBytes)) != -1) {
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md.update(dataBytes, 0, bytesRead);
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}
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byte[] mdBytes = md.digest();
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StringBuilder sb = new StringBuilder();
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for (byte mdByte : mdBytes) {
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sb.append(Integer.toString((mdByte & 0xff) + 0x100, 16).substring(1));
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}
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return sb.toString();
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}
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public static String calculateMd5(InputStream inputStream)
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throws NoSuchAlgorithmException, IOException {
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MessageDigest digest = MessageDigest.getInstance("MD5");
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byte[] buffer = new byte[8192];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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digest.update(buffer, 0, bytesRead);
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}
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return bytesToHex(digest.digest());
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}
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public static String calculateSHA1(File file) throws NoSuchAlgorithmException, IOException {
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MessageDigest digest = MessageDigest.getInstance("SHA-1");
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try (InputStream inputStream = new FileInputStream(file)) {
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byte[] buffer = new byte[4096];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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digest.update(buffer, 0, bytesRead);
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}
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}
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byte[] hashBytes = digest.digest();
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return bytesToHex(hashBytes);
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}
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public static String calculateSHA256(File file) throws NoSuchAlgorithmException, IOException {
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MessageDigest digest = MessageDigest.getInstance("SHA-256");
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try (InputStream inputStream = new FileInputStream(file)) {
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byte[] buffer = new byte[4096];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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digest.update(buffer, 0, bytesRead);
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}
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}
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byte[] hashBytes = digest.digest();
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return bytesToHex(hashBytes);
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}
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private static String bytesToHex(byte[] bytes) {
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StringBuilder hexString = new StringBuilder();
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for (byte b : bytes) {
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String hex = String.format("%02x", b & 0xFF);
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/*大写*/
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// String hex = String.format("%02X", b & 0xFF);
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hexString.append(hex);
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}
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return hexString.toString();
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}
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}
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