openssl genrsa -out keypair.pem 2048
openssl rsa -in keypair.pem -pubout -out publickey.crt
openssl pkcs8 -topk8 -inform PEM -outform PEM -nocrypt -in keypair.pem -out pkcs8.keyjava.lang.ClassNotFoundException: net.minidev.json.JSONObject
java.lang.NoClassDefFoundError: net/minidev/json/JSONObject
<dependency>
<groupId>com.nimbusds</groupId>
<artifactId>nimbus-jose-jwt</artifactId>
<version>[6.0.1,8.20]</version>
</dependency>