Question

import java.sql.*;

public class OracleJDBC {

    public static void main(String[] args) {
        String url = "jdbc:oracle:thin:@localhost:1521:TestDB";
        String user = "kdhong";
        String pass = "kdhong";
        Connection conn = null;
        String sql = null;
        String query = null;
        int result;

        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            System.out.println("success!");
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            System.err.println("error1 = " + e.getMessage());
            System.exit(1);
        }

        try {
            conn = DriverManager.getConnection(url, user, pass);
            System.out.println("success!");
        } catch (SQLException e) {
            e.printStackTrace();    
        }

        try {
            conn.setAutoCommit(false);
            Statement stmt = conn.createStatement();
            sql = "create table testtable(" +
            "id int)";
            result = stmt.executeUpdate(sql);
            if(result == 0)
                System.out.println("table created!!");
            conn.commit();
            conn.setAutoCommit(true);
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

我正在使用 Oracle DB 11g 并尝试将其与我的Java应用程序连接。我在我的eclipse IDE中尝试了这个Java代码。我在 jre / lib / ext 文件夹中安装了 ojdbc6 ，并执行了该程序。类DriverManager已成功创建。但我的代码挂在conn=DriverManager.getConnection(url, user, pass);语句上。我打印了跟踪堆栈。

java.sql.SQLException: Socket read timed out
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(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at OracleJDBC.main(OracleJDBC.java:24)
Caused by: oracle.net.ns.NetException: Socket read timed out
at oracle.net.ns.Packet.receive(Packet.java:320)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:286)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
... 7 more
Exception in thread "main" java.lang.NullPointerException
at OracleJDBC.main(OracleJDBC.java:31)

我已经检查过OracleOraDb11g_home1TNSListener服务正在服务中。那么什么样的其他问题会导致这种连接问题呢？

套接字读取在Oracle JDBC连接中超时

0 个答案: