Picture and Base64 encoded strings convert each other, and the picture and byte arrays convert each other

Convert images and Base64 encoded strings to each other

ImportSun.misc.BASE64Decoder;ImportSun.misc.BASE64Encoder;ImportJava.io.*;/** * @authorLishupeng * @create 2017-05-06 pm 2:56 **/ Public classBase64test { Public Static voidMain (string[] args) {String strimg=Getimagestr ();        System.out.println (STRIMG);    Generateimage (STRIMG); }    //Convert images into base64 strings     Public StaticString Getimagestr () {//Converts a picture file into a byte array string and Base64 it for encodingString imgfile = "C:\\users\\administrator\\desktop\\a\\1.png";//pictures to be processedInputStream in =NULL; byte[] data =NULL; //reading a picture byte array        Try{ in=NewFileInputStream (Imgfile); Data=New byte[In.available ()];            In.read (data);        In.close (); } Catch(IOException e) {e.printstacktrace (); }        //Base64 encoding of byte arraysBase64encoder encoder =NewBase64encoder (); returnEncoder.encode (data);//returns a BASE64 encoded byte array string    }    //base64 strings into pictures     Public Static BooleanGenerateimage (String imgstr) {//Base64 decoding a byte array string and generating a picture        if(Imgstr = =NULL)//image data is empty            return false; Base64decoder Decoder=NewBase64decoder (); Try {            //Base64 decoding            byte[] B =Decoder.decodebuffer (IMGSTR);  for(inti = 0; i < b.length; ++i) {if(B[i] < 0) {//Adjust Exception DataB[i] + = 256; }            }            //Create a JPEG pictureString Imgfilepath = "D://222.jpg";//the newly generated pictureOutputStream out =NewFileOutputStream (Imgfilepath);            Out.write (b);            Out.flush ();            Out.close (); return true; } Catch(Exception e) {return false; }    }

Picture and byte arrays convert each other

ImportJavax.imageio.stream.FileImageInputStream;ImportJavax.imageio.stream.FileImageOutputStream;ImportJava.io.ByteArrayOutputStream;ImportJava.io.File;Importjava.io.FileNotFoundException;Importjava.io.IOException;/** * @authorLishupeng * @create 2017-05-06 pm 3:48 **/ Public classImage2byte { Public Static voidMain (string[] args) {byte[] data = Image2byte ("C:\\users\\administrator\\desktop\\a\\1.png"));        System.out.println (Data.tostring ()); Byte2image (data,"D://222.jpg"); }    //picture to byte array     Public Static  byte[] image2byte (String path) {byte[] data =NULL; Fileimageinputstream input=NULL; Try{input=NewFileimageinputstream (NewFile (path)); Bytearrayoutputstream Output=NewBytearrayoutputstream (); byte[] buf =New byte[1024]; intNumbytesread = 0;  while((Numbytesread = Input.read (BUF))! =-1) {output.write (buf,0, Numbytesread); } Data=Output.tobytearray ();            Output.close ();        Input.close (); } Catch(FileNotFoundException ex1) {ex1.printstacktrace (); } Catch(IOException ex1) {ex1.printstacktrace (); }        returndata; }    //byte array to picture     Public Static voidByte2image (byte[] data, String path) {        if(Data.length < 3 | | path.equals (""))return; Try{fileimageoutputstream Imageoutput=NewFileimageoutputstream (NewFile (path)); Imageoutput.write (data,0, data.length);            Imageoutput.close (); System.out.println (Make picture success,please find image in "+path); } Catch(Exception ex) {System.out.println ("Exception:" +ex);        Ex.printstacktrace (); }    }    //byte array to 16 binary string     PublicString byte2string (byte[] data) {        if(Data = =NULL|| Data.length <= 1)return"0x"; if(Data.length > 200000)return"0x"; StringBuffer SB=NewStringBuffer (); intBuf[] =New int[Data.length]; //byte array converted to decimal         for(intk = 0; K < Data.length; k++) {Buf[k]= Data[k] < 0? (Data[k] + 256): (Data[k]); }        //decimal into hexadecimal         for(intk = 0; K < Buf.length; k++) {            if(Buf[k] <) sb.append ("0" +integer.tohexstring (Buf[k])); Elsesb.append (integer.tohexstring (buf[k)); }        return"0x" +sb.tostring (). toUpperCase (); }}

Picture and Base64 encoded strings are converted to each other, and images and byte arrays are converted to each other