我正在尝试使用google pubsub源连接器从我的google云获取数据到kafka。我确实得到了数据，但是消息是以字节的形式出现的。我在这里提到过，如前所述，我使用了json转换器来更改它。
这是我的连接器代码部分：

name=CPSSourceConnector
connector.class=com.google.pubsub.kafka.source.CloudPubSubSourceConnector
tasks.max=10
kafka.topic=test-topic
kafka.topic.replication.factor=1
kafka.key.attribute=message
key.converter=org.apache.kafka.connect.json.JsonConverter
key.converter.schemas.enable=true
value.converter=org.apache.kafka.connect.json.JsonConverter
value.converter.schemas.enable=true
cps.subscription=test-sub
cps.project=sensor-alpha

这就是我在Kafka中得到的：

{
   "schema":{
      "type":"struct",
      "fields":[
         {
            "type":"bytes",
            "optional":false,
            "field":"message"
         },
         {
            "type":"string",
            "optional":false,
            "field":"subFolder"
         },
         {
            "type":"string",
            "optional":false,
            "field":"deviceId"
         },
         {
            "type":"string",
            "optional":false,
            "field":"deviceRegistryLocation"
         },
         {
            "type":"string",
            "optional":false,
            "field":"projectId"
         },
         {
            "type":"string",
            "optional":false,
            "field":"deviceNumId"
         },
         {
            "type":"string",
            "optional":false,
            "field":"deviceRegistryId"
         }
      ],
      "optional":false
   },
   "payload":{
      "message":"eyJzZW5zb3JfaWQiOiAiYmEwMGQyNjNiNzRiMzBhMGFjM2EzMDlkZWZjZjM0ODMtMzAyIiwgInRfY2Vsc2l1cyI6IDEwLCAicmVnaXN0cnlfaWQiOiAiYmFsZW5hLXJlZ2lzdHJ5IiwgInByZXNzdXJlIjogMTAsICJ0aW1lc3RhbXAiOiAxNTk4NDM2NTk3LjQxNTEwNDYsICJkZXZpY2VfaWQiOiAiYmEwMGQyNjNiNzRiMzBhMGFjM2EzMDlkZWZjZjM0ODMiLCAic3RyaW5nX2JhdHRlcnkiOiAiYmF0dGVyeV9ub3JtYWwiLCAic3RyaW5nX2luZmxhdGUiOiAidGlyZV9vdmVyX2luZmxhdGVkIn0=",
      "subFolder":"",
      "deviceId":"deviceid",
      "deviceRegistryLocation":"region_value",
      "projectId":"projectid",
      "deviceNumId":"device_num_value",
      "deviceRegistryId":"registryid"
   }
}

即使在提供了连接器之后，我也会以字节的形式获得消息的细节。我还需要做些什么把它转换成json格式吗？