Page Comparison

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$allcerts = Get-Content "$env:UserProfile\Downloads\host.domain.tld_full-chain.cerpem" -Encoding UTF8 -Raw
$i = 0
[regex]::Matches($allcerts, '(-{5}BEGIN CERTIFICATE-{5}[\s\S]*?-{5}END CERTIFICATE-{5})') | ForEach-Object {
    $i++
    $_.value | Out-file "$env:UserProfile\Downloads\host.domain.tld_part-$i.pem"
}

...

keytool -import -file host.domain.tld_part-n.pem -alias <host.domain.tld|domain.tld_CA|tld_CA> -keystore %JAVA_HOME%\lib\security\cacerts

 Note Note1, you may wish to first backup your %JAVA_HOME%\lib\security\cacerts file

 Note2, if you don't have JAVA_HOME defined in your environment, you may get an error saying JAVA_HOME is not defined.  To confirm, type set and if you do not see JAVA_HOME listed, define it via set JAVA_HOME=<path to JAVA home ex: "C:\Program Files\Java\jre1.8.0_151">

 IMPORTANT, if you are importing certificates for a JRE that was bundled with your installed software, ie:  NoMagic (Cameo, MagicDraw (MD)), Rhapsody, etc.  please ensure you specify the keystore path for that bundled instance of JRE VS the default as shown above (for MD, you can determine the installed path of JRE by checking Help, About and clicking on the Environments tab; for Rhapsody, open the rhapsody.ini in your installation folder and examine the JavaLocation= var under the [JVM] section).