J'essaie de me connecter à la base de données Oracle 12c en utilisant java dans eclipse. C'est l'exception qui continue de se faire attraper.Impossible de se connecter à la base de données Oracle
Exception in thread "main" java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:743)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at DBHelper.makeConnection(DBHelper.java:31)
at Main.main(Main.java:37)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:470)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:506)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:595)
at oracle.net.ns.NSProtocolStream.negotiateConnection(NSProtocolStream.java:246)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:264)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1452)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:496)
... 7 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(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 oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:161)
at oracle.net.nt.ConnOption.connect(ConnOption.java:159)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:428)
... 13 more
Voici ce que je l'ai fait
main.java
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
public class Main {
public static void main(String[] arg) throws SQLException{
DBHelper dbconn = new DBHelper("system", "reborn78");
Connection conn = dbconn.makeConnection();
ResultSet result = dbconn.runQuery(conn, "SELECT A,B FROM NEWS");
System.out.println(result);
}
}
DBHelper.java
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class DBHelper {
private String userName;
private String passWord;
private final String url = "jdbc:oracle:thin:@localhost:1521/ORCL";
public DBHelper(String userName, String passWord) throws SQLException{
Driver myDriver = new oracle.jdbc.driver.OracleDriver();
DriverManager.registerDriver(myDriver);
this.userName = userName;
this.passWord = passWord;
}
public Connection makeConnection() throws SQLException{
Properties props = new Properties();
props.setProperty("user", this.userName);
props.setProperty("password", this.passWord);
return DriverManager.getConnection(this.url,props);
}
public ResultSet runQuery(Connection conn, String sqlQuery) throws SQLException{
PreparedStatement preStatement;
ResultSet result;
Statement statement = conn.createStatement();
preStatement = conn.prepareStatement(sqlQuery);
statement.execute(sqlQuery);
result = preStatement.executeQuery();
return result;
}
}
ci-dessous est mon fichier listener.ora
# listener.ora Network Configuration File: E:\app\Usama\product\12.1.0\dbhome_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = E:\app\Usama\product\12.1.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\Usama\product\12.1.0\dbhome_1\bin\oraclr12.dll")
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)
ci-dessous est mon fichier tnsnames.ora
# tnsnames.ora Network Configuration File: E:\app\Usama\product\12.1.0\dbhome_1\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.
LISTENER_ORCL =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
SQL est connecté à l'aide sqlplus et l'auditeur en cours d'exécution et connecté au développeur sql aussi bien! est en dessous du lien vers des images https://www.dropbox.com/sh/vbv0gkfcz2g59t5/AACtIVR1-bIen99DNN4HDsWaa?dl=0
J'ai perdu trois jours à obtenir ce droit, j'ai pu obtenir de travailler hier, mais aujourd'hui quand je remis en marche mon système, la même erreur est de retour. J'ai tout essayé mais rien ne semble fonctionner aujourd'hui. Merci d'avance
Votre serveur Oracle est-il exécuté localement? Est-ce que ça marche? – GolezTrol
Oui, avez-vous vérifié les photos ci-jointes? –
https://www.dropbox.com/s/2i5xp87vam97779/sql%20developer%20running%20and%20connected.jpg?dl=0 Veuillez vérifier cela, je suis sûr qu'il fonctionne –