Several encryption algorithms

BASE64 Encryption:

1.org.apache.commons.codec, no line break after encryption

 Packageutil;Importjava.io.UnsupportedEncodingException;Importorg.apache.commons.codec.binary.Base64;/*** @todo Apache Commons-codec.jar The resulting encoded string is no line break *@authorZhangyanan * @date August 7, 2018*/ Public classCommonscodecencodedecode {/*** Encrypt STR * *@paramSTR *@return     */     Public Staticstring getBase64 (String str) {byte[] B =NULL; String s=NULL; Try{b= Str.getbytes ("Utf-8"); } Catch(unsupportedencodingexception e) {e.printstacktrace (); }        if(b! =NULL) {s=base64.encodebase64string (b); }        returns; }        /*** Decrypt S * *@paramSTR *@return     */     Public Staticstring GetFromBase64 (string s) {byte[] B =NULL; String result=NULL; if(s! =NULL) {            Try{b=Base64.decodebase64 (s); Result=NewString (b, "Utf-8"); } Catch(Exception e) {e.printstacktrace (); }        }        returnresult; }}

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2.sun.misc.base64, not recommended, with a newline return after encryption

 Packageutil;ImportJava.io.FileOutputStream;ImportJava.io.OutputStream;Importjava.io.UnsupportedEncodingException;ImportSun.misc.BASE64Decoder;ImportSun.misc.BASE64Encoder;/*** @todo BASE64 Encryption and decryption class *@authorZhangyanan * @date August 6, 2018*/@SuppressWarnings ("Restriction") Public classEncodeanddecode { Public Static voidMain (string[] args) {String base64= GetBase64 ("HTTP:WWW.BAIDU.COMASDFSDFCAEWFSDCSDFQWEAFD input 1230.,. "); String fromBase64=GetFromBase64 (base64);        System.out.println (base64);        System.out.println ();            System.out.println (FROMBASE64); }    /*** Encrypt STR * *@paramSTR *@return     */     Public Staticstring getBase64 (String str) {byte[] B =NULL; String s=NULL; Try{b= Str.getbytes ("Utf-8"); } Catch(unsupportedencodingexception e) {e.printstacktrace (); }        if(b! =NULL) {s=NewBase64encoder (). Encode (b); }        returns; }        /*** Decrypt S * *@paramSTR *@return     */     Public Staticstring GetFromBase64 (string s) {byte[] B =NULL; String result=NULL; if(s! =NULL) {Base64decoder decoder=NewBase64decoder (); Try{b=Decoder.decodebuffer (s); Result=NewString (b, "Utf-8"); } Catch(Exception e) {e.printstacktrace (); }        }        returnresult; }     Public Static BooleanGenerateimage (String base64str, String savepath) {//Base64 decoding a byte array string and generating a picture        if(Base64str = =NULL)//image data is empty            return false; //System.out.println ("Start decoding");Base64decoder decoder =NewBase64decoder (); Try {            //Base64 decoding            byte[] B =Decoder.decodebuffer (BASE64STR); //System.out.println ("decode complete");             for(inti = 0; i < b.length; ++i) {if(B[i] < 0) {//Adjust Exception DataB[i] + = 256; }            }            //System.out.println ("Start image generation"); //Create a JPEG pictureOutputStream out =NewFileOutputStream (Savepath);            Out.write (b);            Out.flush ();            Out.close (); return true; } Catch(Exception e) {e.printstacktrace (); return false; }    }}

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3.javax.xml.bind.datatypeconverter recommended use of concise speed, no line break, java1.6 start built-in

 Packageutil;ImportJavax.xml.bind.DatatypeConverter;/*** @todo *@authorZhangyanan * @date August 7, 2018*/ Public classDatatypeconvertertest { Public Static voidMain (string[] args) {String s= "Www.bai Comment"; String printbase64binary=datatypeconverter.printbase64binary (S.getbytes ());        System.out.println (printbase64binary); byte[] Parsebase64binary =datatypeconverter.parsebase64binary (printbase64binary); System.out.println (NewString (parsebase64binary)); System.out.println ("----------"); }}

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4.java.util.base64 recommended, the fastest, concise, no line-wrapping, but to java1.8 environment (@ Reference blog)

Importjava.io.UnsupportedEncodingException;Importjava.util.Base64;/*** @todo java8 java.util.Base64 Test *@authorZhangyanan * @date August 7, 2018*/ Public classTestBase64 { Public Static voidMain (string[] args)throwsunsupportedencodingexception {//CodingString asB64 = Base64.getencoder (). encodetostring ("chat ss33!%". GetBytes ("Utf-8")); System.out.println (asB64);//output is: c29tzsbzdhjpbmc=//decoding        byte[] Asbytes =Base64.getdecoder (). Decode (asB64); System.out.println (NewString (Asbytes, "utf-8"));//output is: some string    }    }

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Several encryption algorithms