-
import java.applet.*;
-
import java.io.*;
-
import java.security.*;
-
-
public class HashFile {
-
public static char[] hexChar = {'0', '1', '2', '3',
-
'4', '5', '6', '7',
-
'8', '9', 'a', 'b',
-
'c', 'd', 'e', 'f'};
-
public static void main(String[] args) throws
- Exception {
-
String fileName = "D://programs//Foxmail.rar";
-
String hashType = "MD5";
-
System.out.println(hashType + " == " +
- getHash(fileName, hashType));
-
hashType = "SHA1";
-
System.out.println(hashType + " == " +
- getHash(fileName, hashType));
-
hashType = "SHA-256";
-
System.out.println(hashType + " == " +
- getHash(fileName, hashType));
-
hashType = "SHA-384";
-
System.out.println(hashType + " == " +
- getHash(fileName, hashType));
-
hashType = "SHA-512";
-
System.out.println(hashType + " == " +
- getHash(fileName, hashType));
-
- }
-
-
public static String getHash(String fileName, String hashType) throws
- Exception {
- InputStream fis;
-
fis = new FileInputStream(fileName);
-
byte[] buffer = new byte[1024];
- MessageDigest md5 = MessageDigest.getInstance(hashType);
-
int numRead = 0;
-
while ((numRead = fis.read(buffer)) > 0) {
-
md5.update(buffer, 0, numRead);
- }
- fis.close();
-
return toHexString(md5.digest());
- }
-
-
public static String toHexString(byte[] b) {
-
StringBuilder sb = new StringBuilder(b.length * 2);
-
for (int i = 0; i < b.length; i++) {
-
sb.append(hexChar[(b[i] & 0xf0) >>> 4]);
-
sb.append(hexChar[b[i] & 0x0f]);
- }
-
return sb.toString();
- }
- }
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