# 生成jwt公钥私钥
$ keytool -genkeypair -alias mytest -keyalg RSA \
-keypass mypass -keystore mytest.jks -storepass mypass
# -alias 别名
# -keyalg 算法
# -keypass 私钥的密码
# -keystore 存储公钥和私钥的文件名
# -storepass keystore的密码# 导出公钥私钥成字符串
$ keytool -list -rfc --keystore mytest.jks | openssl x509 -inform pem -pubkey
输出的公钥和证书
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA077yQgcZuKyj+hdxFGb+
01ZRFr6n7iKN9e6PjgY1jwpHR1Qr30mLo18Lqfj4xRf4NXLwzLUk58PRh4ZjJFHq
QF5ULeAtH2he0HlhbxSRNElQoBC0B5xUWxs97U/bsRPkQILov9iwC2pyLVnnOIZE
g0KR0qEWpfIS2T6b+Y5VdKaw7WSvgT9qbv/UgXHuVvBimg4XbYmo/9UAzwJZyNWs
iNMyq07myfRR0lxxiegqZgVBbi0rhP+1sB4d0Rvnp/FH1ssBOnSKZMEc93evWgv5
gyw6AwC0fw31sK7FaFTBHhRcy47BwsMLhBJu6/7ARZRQAz1Ds7Ap+SYIaBs9jqQG
cQIDAQAB
-----END PUBLIC KEY-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----