markdown 使用OpenSSL下载PEM证书并导入Java TrustStore

Posted 2021-05-05

## Download the Certificate using OpenSSL Command

```
echo "" | openssl s_client -connect server-that-you-want-to-connect:port -showcerts 2>/dev/null | openssl x509 -out cert.pem
```

## Import the downloaded certificate using Java 11 to truststore

```
keytool -import -storepass changeit -noprompt -file cert.pem -cacerts
```

## Import the downloaded certificate using Java 8 to truststore

```
keytool -import -keystore $JAVA_HOME/lib/security/cacerts -storepass changeit -noprompt -file cert.pem -cacerts
```