Various conversions of pictures

Spent the morning on the time summed up the various ways to convert the film, in this share.

import java.io.bytearrayoutputstream;import java.io.file;import java.util.base64;import  javax.imageio.stream.fileimageinputstream;import javax.imageio.stream.fileimageoutputstream;public  Class ccc {public static void main (String[] args)  throws Exception{ File file=new file ("D://2.png");//file file2=new file ("d://3.png"); byte data[]= Imagetobyte (file);//string str=bytetohex (data);//byte data2[]=hextobyte (str); Bytetoimage ( Base64stringtobyte (bytetobase64string (data)), "D://aaaa.png");} Picture Turn binary public static byte[] imagetobyte (file file) throws exception{ Fileimageinputstream input =new fileimageinputstream (file); bytearrayoutputstream  Output = new bytearrayoutputstream ();  byte[] data = null;   Byte[] buf = new byte[1024];      int numbytesread = 0;      while  ((Numbytesread = input.read (BUF))  != -1)  {      output.write (Buf, 0, numbytesread);       }      data = output.tobytearray () ;       output.close ();       input.close (); return  data;} Binary Turn string Public static string bytetohex (byte[] b) throws exception{           stringbuffer sb = new stringbuffer ();           String stmp =  "";           for  (int n = 0; n < b.length; n + +)  {              stmp =  integer.tohExstring (B[N]&NBSP;&AMP;&NBSP;0XFF);               if  (Stmp.length ()  == 1)  {                   sb.append ("0"  + stmp);               } else {                   sb.append (STMP);               }           }          return  Sb.tostring ();       }  //string into binary public static byte[]  Hextobyte (STRING&NBSP;STR)  {          if  (str  == null)               return null;           str = str.trim ();           int len = str.length ();           if  (len == 0 | | &NBSP;LEN&NBSP;%&NBSP;2&NBSP;==&NBSP;1)                return null;          byte[] b  = new byte[len / 2];          try  {              for  (int  I = 0; i < str.length ();  i += 2)  {                   b[i / 2] =  (Byte)  integer.decode ("0X"  + str.substring (i, i + 2)). IntValue ();               }               return b;           } catch  (exception e)  {               return null;           }      }  //binary turn picture  path for picture address public static  Void bytetoimage (Byte[] data,string path) {    if (data.length<3| | Path.equals (""))  return;    try{    FileImageOutputStream  Imageoutput = new fileimageoutputstream (New file (path));     Imageoutput.write (data, 0, d ata.length);     imageoutput.close ();     system.out.println ("Make  Picture success,Please find image in  " + path);     } catch (Exception ex)  {      system.out.println ("Exception:   " + ex";       ex.printstacktrace ();     }   }//binary byte[]  to  base64 string public static string bytetobase64string (byte[]  data) {String base64string=base64.getencoder (). encodetostring (data); return base64string;} Base64 string   Go   binary byte[]public static byte[] base64stringtobyte (string  base64string)  {byte[] bytes = base64.getdecoder (). Decode (base64string); return bytes;}

The picture-to-string recommendation uses the Base64 conversion method, the Base64 string to the foreground can be displayed directly.

The format is

Note: The Util.base64 package here is jdk1.8 only.

Various conversions of pictures