使用JDBC在localhost中连接oracle 11G时出错 [英] Error in connecting oracle 11G in localhost using JDBC

问题描述

import java.sql.*;

public class one {

    public static void main(String[] args)

    {
            Connection conn=null;
        Statement stmt=null;

        try
        {
        Class.forName("oracle.jdbc.driver.OracleDriver");
            conn=DriverManager.getConnection("jdbc:oracle:thin:@//localhost:1521/ecom","system","manager");
        stmt=conn.createStatement();
        String str="insert into country values(3,'bangladesh');";
        int k=stmt.executeUpdate(str);
        System.out.println(k);
            }
        catch(Exception e)
        {
            e.printStackTrace();

        }

    }
    }

我添加到类路径的唯一jar文件是 ojdbc6.jar 是否需要连接 oracle 11g（11.2.0.1）所需的其他jar文件.0）我使用eclipse作为IDE

The only jar file I added to the class path is ojdbc6.jar is there any other jar required for connecting with oracle 11g(11.2.0.1.0) I am using eclipse as IDE

这里是错误

java.sql.SQLException: The Network Adapter could not establish the connection
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:412)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at one.main(one.java:17)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
    at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:359)
    at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:422)
    at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:672)
    at oracle.net.ns.NSProtocol.connect(NSProtocol.java:237)
    at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
    ... 7 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocket`Impl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(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:141)

推荐答案

1）请确保数据库主机名，端口号或数据库实例名称正确无误。
2）确保已启动TNSListener（运行lsnrctl start）

1) Please be sure database host name, port number, or database instance name are correct. 2) Be sure the TNSListener has been started ( run lsnrctl start)

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