MessageDigest---sha-1 encryption

import java.io.file;import java.io.fileinputstream;import java.io.ioexception;import  java.io.unsupportedencodingexception;import java.security.messagedigest;import  Java.security.nosuchalgorithmexception;/** * sha-1 Tool  */public class sha1util {      /**      *  sha-1 string to calculate strings        */     PUBLIC STATIC BYTE[] SHA1 ( String  str ) {          try {               RETURN SHA1 ( str.getBytes (  "Utf-8")  )  );          } catch  ( Unsupportedencodingexception e)  {               throw new runtimeexception ( e );          }     }           /**      *  sha-1 string for calculating files       */     PUBLIC STATIC BYTE[] SHA1 (  File file ) {          byte[] bytes  = new byte[  (int) file.length ()  ];           try {               Fileinputstream fis = new fileinputstream ( file );               fis.read ( bytes );               fis.close ();           } catch  (ioexception e)  {               throw new runtimeexception ( e );           }                     RETURN SHA1 ( bytes );     }           /**      *  sha-1 string to compute byte array       */     PUBLIC STATIC BYTE[] SHA1 (  byte[] bytes ) {          try {               messagedigest messagedigest  = messagedigest.getinstance (  "SHA-1"  );               byte[] bs = messagedigest.digest ( bytes );               return bs;           } catch  (nosuchalgorithmexception e)  {               throw new runtimeexception ( e );           }     }}

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MessageDigest---sha-1 encryption