java.sql.SQLException : 네트워크 어댑터가 연결을 설정할 수 없습니다.

Question

오늘 문제가 발생했습니다. Oracle 11g이 내 PC에 localy가 설치되어 있고 JAR Ojdbc6을 사용하여 데이터베이스에 연결하여 Java 코드를 사용하지 않고 연결하려고했습니다. 그러나 내가 시도한 모든 것은 효과가 없었다. 시도 : - SQL DEV => 연결이 작동했습니다. - 시작 리스너 => 모두 준비가 시작되었습니다. - URL에서 Ip를 변경하려고합니다.> 여전히 연결할 수 없습니다. 일반 오류이지만 하나는 좋은 반응을 보입니다. SQL DEV가 작동하지만 Eclipse가 아닌 이유는 이해할 수 없습니다. 이 내 오류입니다

package testare; 

import java.sql.DriverManager; 
import java.sql.Connection; 
import java.sql.SQLException; 

public class oracle { 

    public static void main(String[] argv) { 

     System.out.println("-------- Oracle JDBC Connection Testing ------"); 

     try { 

      Class.forName("oracle.jdbc.driver.OracleDriver"); 

     } catch (ClassNotFoundException e) { 

      System.out.println("Where is your Oracle JDBC Driver?"); 
      e.printStackTrace(); 
      return; 

     } 

     System.out.println("Oracle JDBC Driver Registered!"); 

     Connection connection = null; 

     try { 

      connection = DriverManager.getConnection(
       "jdbc:oracle:thin:@localhost:1521/orcl", "hr","hr"); 
     } catch (SQLException e) { 

      System.out.println("Connection Failed! Check output console"); 
      e.printStackTrace(); 
      return; 

     } 

     if (connection != null) { 
      System.out.println("You made it, take control your database now!"); 
     } else { 
      System.out.println("Failed to make connection!"); 
     } 
    } 

} 

: 나는 누군가가 '나를 도울 수 있기를 바랍니다

는

이

내 코드 내가 올바른 URL이있을 거라고 생각

-------- Oracle JDBC Connection Testing ------ 
Oracle JDBC Driver Registered! 
Connection Failed! Check output console 
java.sql.SQLException: The Network Adapter could not establish the connection 
    at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70) 
    at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133) 
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:199) 
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:480) 
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:413) 
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:508) 
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:203) 
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33) 
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:510) 
    at java.sql.DriverManager.getConnection(Unknown Source) 
    at java.sql.DriverManager.getConnection(Unknown Source) 
    at testare.oracle.main(oracle.java:31) 
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection 
    at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:328) 
    at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:421) 
    at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:630) 
    at oracle.net.ns.NSProtocol.connect(NSProtocol.java:329) 
    at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:966) 
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:292) 
    ... 7 more 
Caused by: java.net.ConnectException: Connection refused: connect 
    at java.net.DualStackPlainSocketImpl.connect0(Native Method) 
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) 
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source) 
    at java.net.PlainSocketImpl.connect(Unknown Source) 
    at java.net.SocksSocketImpl.connect(Unknown Source) 
    at java.net.Socket.connect(Unknown Source) 
    at java.net.Socket.connect(Unknown Source) 
    at java.net.Socket.<init>(Unknown Source) 
    at java.net.Socket.<init>(Unknown Source) 
    at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:127) 
    at oracle.net.nt.ConnOption.connect(ConnOption.java:126) 
    at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:306) 
    ... 12 more 

Answer 1

jdbc:oracle:thin:@localhost:1521:orcl