Beginner MD5 Encryption

1. Create a tool class

Importjava.security.MessageDigest; /*** class Name: Cipherutil * Class Description: 16-bit MD5 encryption of data * created by: Jxufe hehaiyang* created: 2015-1-19 06:33:26 * Edit notes: *@version */ Public classcipherutil{//hexadecimal number-to-character mapping array    Private Final StaticString[] hexdigits = {"0", "1", "2", "3", "4",          "5", "6", "7", "8", "9", "a", "B", "C", "D", "E", "F"}; /*** Method Name: Generatepassword * Method Action: TODO encrypts String * Creator: Jxufe Hehaiyang * created: 2015-1-20 09:58:05 * @param @paraminputstring *@param @return* return value type: String *@throws     */     Public Staticstring Generatepassword (String inputstring) {returnencodeByMD5 (inputstring); }            /*** Method Name: ValidatePassword * Method Action: TODO verifies that the password entered is correct * created by: Jxufe Hehaiyang * Created: 2015-1-20 09:57: *@param @paramPassword *@param @paraminputstring *@param @return* Return value type: Boolean *@throws     */     Public Static BooleanValidatePassword (string password, string inputstring) {if(Password.equals (encodeByMD5 (inputstring))) {return true; } Else{              return false; }      }      /*** Method Name: EncodeByMD5 * Method Action: TODO MD5 string Encryption * created by: Jxufe Hehaiyang * created: 2015-1-20 09:57:38 * @param @paramoriginstring *@param @return* return value type: String *@throws     */    Private Staticstring encodeByMD5 (String originstring) {if(Originstring! =NULL){              Try{                  //creates a summary of information with the specified algorithm nameMessageDigest MD = messagedigest.getinstance ("MD5"); //The summary is last updated with the specified byte array, and the summary calculation is completed                byte[] results =md.digest (Originstring.getbytes ()); //turns the resulting byte array into a string returnString resultstring =bytearraytohexstring (results); returnresultstring.touppercase (); } Catch(Exception ex) {ex.printstacktrace (); }          }          return NULL; }            /*** Method Name: Bytearraytohexstring * Method function: TODO convert byte array to hexadecimal String * Creator: Jxufe Hehaiyang * created on: 2015-1-20 Afternoon 09:57:29 *@param @paramb *@param @return* return value type: String *@throws     */    Private StaticString bytearraytohexstring (byte[] b) {StringBuffer RESULTSB=NewStringBuffer ();  for(inti = 0; i < b.length; i++) {resultsb.append (bytetohexstring (b[i)); }          returnresultsb.tostring (); }            /*** Method Name: Bytetohexstring * Method Action: TODO converts a byte into a 16-binary string * Creator: Jxufe Hehaiyang * Created: 2015-1-20 pm 09 : 57:17 *@param @paramb *@param @return* return value type: String *@throws     */    Private StaticString bytetohexstring (byteb) {          intn =b; if(N < 0) n= 256 +N; intD1 = n/16; intD2 = n 16; returnHEXDIGITS[D1] +HEXDIGITS[D2]; }  }

MD5 16-bit cryptographic tool class

2. Call method

MD5 is a one-way encryption algorithm that can only be encrypted.

When used, the input string can be MD5 encrypted and then compared to the password.

    New cipherutil ();      

Beginner MD5 Encryption