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For the question of how to java the base64-bit images generated by the front-end js in the back-end, this article introduces the corresponding analysis and solutions in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

/ / 1. Packages to be introduced

Import java.awt.image.BufferedImage

Import java.io.File

Import java.io.FileInputStream

Import java.io.FileOutputStream

Import java.io.IOException

Import java.io.InputStream

Import java.io.OutputStream

Import javax.imageio.ImageIO

Import com.google.zxing.BinaryBitmap

Import com.google.zxing.MultiFormatReader

Import com.google.zxing.client.j2se.BufferedImageLuminanceSource

Import com.google.zxing.common.HybridBinarizer

Import sun.misc.BASE64Decoder

Import sun.misc.BASE64Encoder

/ / 2. The methods used are:

/ * *

* transfer the picture to BASE64

* @ param imagePath path

* @ return

, /

Public static String imageChangeBase64 (String imagePath) {

InputStream inputStream = null

Byte [] data = null

Try {

InputStream = new FileInputStream (imagePath)

Data = new byte [inputStream.available ()]

InputStream.read (data)

InputStream.close ()

} catch (IOException e) {

E.printStackTrace ()

}

/ / encryption

BASE64Encoder encoder = new BASE64Encoder ()

Return encoder.encode (data)

}

/ * *

* BASE to transfer pictures

* @ param baseStr base64 string

* @ param imagePath generated picture

* @ return

, /

Public static boolean base64ChangeImage (String baseStr,String imagePath) {

If (baseStr = = null) {

Return false

}

BASE64Decoder decoder = new BASE64Decoder ()

Try {

/ / decrypt

Byte [] b = decoder.decodeBuffer (baseStr)

/ / processing data

For (int I = 0; I < b.resume; + + I) {

If (b [I] < 0) {

B [I] + = 256

}

}

OutputStream out = new FileOutputStream (imagePath)

Out.write (b)

Out.flush ()

Out.close ()

Return true

} catch (Exception e) {

Return false

}

}

/ / 3 the method of parsing test:

Public static void test1 () {

/ / the address of the picture to be generated

String pp = imageChangeBase64 ("E:\\ 58744.jpg")

/ / print the generated base64 location code

System.out.println ("pp:" + pp)

String pp3= ""; / / the base64 image code returned to you for the front end is omitted here

Base64ChangeImage (pp2.split (",") [1], "E:\\ bb.jpg")

}

/ / generate a Base64-bit network address for the image:

Http://imgbase64.duoshitong.com/

This is the answer to the question about how the base64-bit images generated by the front-end js can be used in the back-end java. I hope the above content can be of some help to you. If you still have a lot of doubts to solve, you can follow the industry information channel for more related knowledge.

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