java串連mongodb報錯，java串連mongodb報

java串連mongodb報錯，java串連mongodb報

<span style="background-color: rgb(255, 255, 255); font-family: Arial, Helvetica, sans-serif;">寫一個簡短的測試程式卻報錯，鬱悶</span>

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);"></span><pre name="code" class="html">public static void main(String[] args) {          try {           Mongo mongo = new Mongo("10.2.167.27",27017);           DB db = mongo.getDB("company");           DBCollection collection = db.getCollection("employees");           BasicDBObject employee = new BasicDBObject();       employee.put("name", "Hannah");       employee.put("no", 2);           collection.insert(employee);           BasicDBObject searchEmployee = new BasicDBObject();       searchEmployee.put("no", 2);           DBCursor cursor = collection.find(searchEmployee);           while (cursor.hasNext()) {        System.out.println(cursor.next());       }           System.out.println("The Search Query has Executed!");          } catch (UnknownHostException e) {       e.printStackTrace();      } catch (MongoException e) {       e.printStackTrace();      }         }    

報錯資訊如下：

java.io.IOException: couldn't connect to [/10.2.167.27:27017] bc:java.net.ConnectException: Connection refused: connect
at com.mongodb.DBPort._open(DBPort.java:224)
at com.mongodb.DBPort.go(DBPort.java:101)
at com.mongodb.DBPort.go(DBPort.java:82)
at com.mongodb.DBPort.findOne(DBPort.java:142)
at com.mongodb.DBPort.runCommand(DBPort.java:151)
at com.mongodb.DBTCPConnector.fetchMaxBsonObjectSize(DBTCPConnector.java:429)
at com.mongodb.Mongo.getMaxBsonObjectSize(Mongo.java:544)
at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:244)
at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:217)
at com.mongodb.DBCollection.insert(DBCollection.java:87)
at mongodb.MongoDBClient.main(MongoDBClient.java:28)

看看伺服器的連接埠：tcp        0      0 127.0.0.1:27017             0.0.0.0:*                   LISTEN      31933/mongod  

說明連接埠監聽已ok。那就是配置問題

開啟vim /etc/mongod.conf 

# Listen to local interface only. Comment out to listen on all interfaces. 
bind_ip=127.0.0.1

看到一條這樣的記錄。連接埠對誰開放。注釋了。ok就可以遠端存取了。

得到正確結果如下：

{ "_id" : { "$oid" : "54a8fcad2d1dc6f5db50564b"} , "name" : "Hannah" , "no" : 2}
The Search Query has Executed!