20141203 images BASE64 encoding and decoding

Recently, we need to pass the image to the mobile side by transcoding, using Base64 transcoding and decoding

import Java.io.FileInputStream;

import Java.io.FileOutputStream;

import java.io.IOException;

import Java.io.InputStream;

import Java.io.OutputStream;

import Sun.misc.BASE64Decoder;

import Sun.misc.BASE64Encoder;

Public class TEXT4 {

Public Static void Main (string[] args) {

String strimg = getimagestr();

System. out. println (STRIMG);

System. out. println (Strimg.length ());

Generateimage (STRIMG);

}

Convert images into Base64 strings

Public Static String Getimagestr () {//Converts a picture file into a byte array string and encodes it Base64

String imgfile = "c:/1.jpg";//Picture to be processed

InputStream in = null;

byte [] data = null;

Reading a picture byte array

Try {

in = new fileinputstream (imgfile);

data = new byte[in.available ()];

In.read (data);

In.close ();

} catch (IOException e) {

E.printstacktrace ();

}

BASE64 encoding of byte arrays

Base64encoder encoder = new base64encoder ();

return Encoder.encode (data);//returns BASE64 encoded byte array string

}

Base64 strings into pictures

Public Static Boolean Generateimage (String imgstr) {//Base64 decoding a byte array string and generating a picture

if (Imgstr = = null)//image data is empty

return false;

Base64decoder decoder = new base64decoder ();

Try {

Base64 decoding

byte [] B = Decoder.decodebuffer (IMGSTR);

for (int i = 0; i < b.length; ++i) {

if (B[i] < 0) {//Adjust exception data

B[i] + = 256;

}

}

Create a jpeg picture

String Imgfilepath = "c:/userimg/xgk2059/111.jpg";//newly generated picture

OutputStream out = new fileoutputstream (Imgfilepath);

System. out. println ("==============================");

Out.write (b);

Out.flush ();

Out.close ();

return true;

} catch (Exception e) {

return false;

}

}

}

20141203 images BASE64 encoding and decoding