Post request to access solr error

Postman access solr
Use post request,this will go wrong,This exception is
"error":

{ "metadata": [ "error-class", "org.apache.solr.common.SolrException", "root-error-class", "org.apache.solr.common.SolrException" ], "msg": "Could not find collection : wfpublish", "code": 400 }

Using get request is successful

Where wfpublish is an alias

Please help me see what is going on.