How to java the base64-bit image generated by the front-end js in the back-end
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.
