[Web] How can I export my private key from a Java Keytool keystore?

https://security.stackexchange.com/questions/3779/how-can-i-export-my-private-key-from-a-java-keytool-keystore

Since Java 6, you can import/export private keys into PKCS#12 (.p12) files using keytool, using -importkeystore (not available in previous versions).

For example:

keytool -importkeystore -srckeystore existing-store.jks -destkeystore new-store.p12 -deststoretype PKCS12

The PKCS12 keystore type is also supported as a standard keystore type in the default Oracle/Sun security provider.