Java Encryption Algorithm series-MD5

 Package **;Importjava.security.MessageDigest;Importjava.security.NoSuchAlgorithmException; Public classMD5 {/*** MD5 encryption algorithm, parameter selection 16 or 32 bit * default is 32 bit *@paramplaintext text to be encrypted *@paramMd5type 16/32 *@returnciphertext after encryption*/     Public Staticstring Md5 (String plaintext,string md5type) {Try{messagedigest MD= Messagedigest.getinstance ("MD5");            Md.update (Plaintext.getbytes ()); byteB[] =md.digest (); inti; StringBuffer buf=NewStringBuffer ("");  for(intoffset = 0; Offset < b.length; offset++) {i=B[offset]; if(I < 0) I+ = 256; if(I < 16) Buf.append ("0");            Buf.append (integer.tohexstring (i)); }            if(md5type!=NULL&&!md5type.trim (). Equals ("") &&md5type.trim (). Equals ("16")){                returnBuf.tostring (). SUBSTRING (8). toUpperCase ();//16-bit encryption}Else{                returnBuf.tostring (). toUpperCase ();//32-bit encrypted capitalization            }        } Catch(nosuchalgorithmexception e) {e.printstacktrace (); return NULL; }    }     Public Static voidMain (string[] args) {Md5 ("123456", "16"); System.out.println (Md5 ("123456", "16")); MD5 ("123456", "32"); System.out.println (Md5 ("123456", "32")); System.out.println (Md5 ("123456", "+"). Equals ("e10adc3949ba59abbe56e057f20f883e")); System.out.println (Md5 ("123456", "+"). Equals ("49ba59abbe56e057")); }}

Java Encryption Algorithm series-MD5