Java processing Picture base64 encoding for mutual conversion

Objective:

Environment: Before using this code: Make sure your JDK is JAVA8 and above

Dev Test Address: http://imgbase64.duoshitong.com/to see if the execution was successful

Precautions:

The generic plug-in Returns a base64 encoded string that has a prefix. "Data:image/jpeg;base64," this has to be removed before decoding.

Code:

Maintest

1 /**2 * Example3      * @throwsunsupportedencodingexception4      * @throwsFileNotFoundException5      */6@SuppressWarnings ("Resource")7      Public Static voidMain (string[] args)throwsunsupportedencodingexception, FileNotFoundException {8String strimg = getimagestr ("z:\\ watermark \\2.bmp");9 System.out.println (strimg);TenFile File =NewFile ("Z://1.txt"); OneFileOutputStream fos =Newfileoutputstream (file); AOutputStreamWriter OSW =NewOutputStreamWriter (FOS, "UTF-8"); -         Try { - Osw.write (strimg); the}Catch(IOException e) { -             //TODO auto-generated Catch block - e.printstacktrace (); -         } +         //generateimage (strimg, "z:\\ watermark \\444.bmp"); -          +}

Encryption:

1**2*@Description: Converting from image address to Base64 encoded string3*@Author:4*@CreateTime:5* @return6*/7      Public Staticstring Getimagestr (String imgfile) {8InputStream InputStream =NULL;9         byte[] data =NULL;Ten         Try { OneInputStream =NewFileInputStream (imgfile); Adata =New byte[Inputstream.available ()]; - inputstream.read (data); - inputstream.close (); the}Catch(IOException e) { - e.printstacktrace (); -         } -         //Encrypt +Encoder Encoder =Base64.getencoder (); -         returnencoder.encodetostring (data); +}

Decrypt:

1 /**2 * @Description: Convert base64 encoded string to picture3 * @Author:4 * @CreateTime:5      * @paramIMGSTR Base64 Encoded string6      * @parampath picture paths-specific to file7      * @return8     */9      Public Static Booleangenerateimage (String imgstr, String path) {Ten             if(Imgstr = =NULL) One                 return false; A             //decryption -             Try { -Decoder Decoder =Base64.getdecoder (); the                 byte[] B =Decoder.decode (IMGSTR); -                 //working with Data -                  for(inti = 0; i < b.length; ++i) { -                     if(B[i] < 0) { +B[i] + = 256; -                     } +                 } AOutputStream out =NewFileOutputStream (path); at Out.write (b); - Out.flush (); - out.close (); -                 return true; -}Catch(IOException e) { -                 return false; in             } -}

Java processing Picture base64 encoding for mutual conversion