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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.security.*;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13.  
  14. 		String pattern="5,4,7,4,1,8";
  15. 		byte[] hash=patternToHash(pattern);
  16.  
  17. 		System.out.printf("解鎖資料 SHA-1 Hash : \n\t");
  18. 		for(int b:hash){
  19. 			System.out.printf("%02x ", (b & 0xFF ) );
  20. 		}
  21. 		System.out.printf("\n串接成字串 : \n\t");
  22. 		System.out.println(byteArrayToString(hash));
  23. 	}
  24.  
  25. 	// 將 Byte array Hex code 串成字串
  26. 	private static String byteArrayToString(byte[] bytes){
  27. 		StringBuilder hash=new StringBuilder();
  28. 		for(int b:bytes){
  29. 			hash.append( String.format("%02x", (b & 0xFF) ) );
  30. 		}
  31. 		return hash.toString();
  32. 	}
  33.  
  34. 	// 取得 Pattern 的 SHA-1 Hash
  35. 	private static byte[] patternToHash(String pattern) {
  36. 	    if (pattern == null || pattern.length()==0) {
  37. 	        return null;
  38. 	    }
  39.  
  40. 	    char[] patternChars = pattern.toCharArray();
  41. 	    byte[] res = new byte[patternChars.length];
  42. 	    for (int i = 0; i < patternChars.length; i++) {
  43. 	        res[i] = (byte)(patternChars[i]-'0');
  44. 	    }
  45. 	    try {
  46. 	        MessageDigest md = MessageDigest.getInstance("SHA-1");
  47. 	        byte[] hash = md.digest(res);
  48. 	        return hash;
  49. 	    } catch (NoSuchAlgorithmException nsa) {
  50. 	        return null;
  51. 	    }
  52. 	}
  53. }
Success #stdin #stdout 0.12s 56324KB
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Standard input is empty
stdout
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解鎖資料 SHA-1 Hash : 
	92 46 54 71 4c 30 8b 44 0e f2 9c 2f ab af 39 fd f2 1f 4c 5e 
串接成字串 : 
	924654714c308b440ef29c2fabaf39fdf21f4c5e
https://ideone.com/X8Jf7E
language:
Java (HotSpot 12)
created:
12 days ago
visibility:
public

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