Java宝典

Map> queueMessageMap = new HashMap<>();
      for (QueueMessage queueMessage: messages){
        queueMessageMap.computeIfAbsent(new JsonObject(queueMessage.getBody()).getString("tenantId"),
            k -> new LinkedList<>()).add(queueMessage);
      }
for (Map.Entry> tenant: queueMessageMap.entrySet()){
    // key = tenant.getKey()
    // value = tenant.getValue()
}