1. Problem: After updating the JDK version, it is found that sun.misc.Base64Encoder and sun.misc.Base64Decoder in the project cannot be used.
2. Reason: /lib/tool.jar and /lib/rt.jar in JDK have been deleted from Java SE 9
3. Problem solving: replace the encryption and decryption method before JDK 9 with the encryption and decryption method after JDK 9
Image encryption: indicates that the image is converted to base64
Image decryption: indicates that the base64 is converted to image
1. Picture encryption and decryption used before JDK 9 (old):
a) Encryption:
BASE64Encoder encoder = new BASE64Encoder();
String imagestr = encoder.encode(captcha);
b) Decryption:
BASE64Decoder decoder = new BASE64Decoder();
byte[] bytes = decoder.decodeBuffer(imagestr);
2. Image encryption and decryption after JDK 9 (new):
a)导入包
import java.util.Base64.Encoder;
import java.util.Base64.Decoder;
import java.util.Base64;
b)图片加密：
Encoder encoder = Base64.getEncoder();
String result = encoder.encodeToString(byteArray);
c) Picture decryption:
Decoder decoder = Base64.getDecoder();
byte[] result = decoder.decode(str);
Everyone is welcome to read. I have limited knowledge, and there are inevitably mistakes or omissions in the blog I wrote. I hope you guys can give me some advice. Thank you.