java.sql.SQLRecoverableException : Io error: Invalid number format for port number in ubuntu 错误

Question

我正在使用 oracle 11g xe 版本。所以我已经建立了类路径并继续执行该程序，但遇到了这些错误:

Connecting to database...
    java.sql.SQLRecoverableException: IO Error: Invalid number format for port number
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:478)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:547)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:225)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:29)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:556)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at jdbcdisplay.main(jdbcdisplay.java:24)
    Caused by: oracle.net.ns.NetException: Invalid number format for port number
at oracle.net.resolver.AddrResolution.resolveSimple(AddrResolution.java:497)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:394)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:873)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:258)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1577)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:353)
... 7 more
GoodBye!!

现在我没有使用任何 IDE，也没有在 Windows 中完成。我正在尝试通过 linux 终端连接，所有可用的帮助几乎都适用于 Windows。 我为该程序使用的连接字符串是:

String jdbcUrl="jdbc:oracle:thin:@localhost:1521/XE:orcl";
String user="Sourajyoti";
String password="*******";
conn=DriverManager.getConnection(jdbcUrl,user,password);

我使用的代码如下:

import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.Date;
import java.sql.SQLException;

class jdbcdisplay
{
public static void main(String[] args)
{
    Connection conn=null;

    try
    {
        String driver="oracle.jdbc.driver.OracleDriver";
        Class.forName(driver);

        System.out.println("Connecting to database...");
        String jdbcUrl="jdbc:oracle:thin:@localhost:1521/XE:orcl";
        String user="Sourajyoti";
        String password="******";

        conn=DriverManager.getConnection(jdbcUrl,user,password);
        Statement stmt=conn.createStatement();
        String sql="SELECT ENAME,SALARY,HIREDATE FROM EMP";
        ResultSet rs=stmt.executeQuery(sql);

        while (rs.next())
        {
            String name=rs.getString("ENAME");
            double salary=rs.getDouble(2);
            Date date=rs.getDate("HIREDATE");
            System.out.print("Name: "+name);
            System.out.print("Salary: "+salary);
            System.out.println("Hiredate: "+date);
        }

        rs.close();
        stmt.close();
        conn.close();
    }
    catch(SQLException se)
    {
        se.printStackTrace();
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
    finally
    {
        try
        {
            if (conn!=null)
                conn.close();
        }
        catch(SQLException se)
        {
            se.printStackTrace();
        }
    }
    System.out.println("GoodBye!!");
}
}

Answer 1

我在使用 REST 连接 Oracle 数据库并从中检索数据时遇到了这个问题。

jdbc:oracle:thin:Herong/TopSecret@localhost:1521:XE
jdbc:oracle:thin:Herong/TopSecret@:1521:XE
jdbc:oracle:thin:Herong/TopSecret@//localhost:1521/XE
jdbc:oracle:thin:Herong/TopSecret@//:1521/XE
jdbc:oracle:thin:Herong/TopSecret@//localhost/XE
jdbc:oracle:thin:Herong/TopSecret@///XE

这些都是连接 URL 的有效变体，但我最终不得不完全删除端口。

        "type": "jdbc",
        "name": "test",
        "connection": {
            "driver": "oracle.jdbc.OracleDriver",
            "url": "jdbc:oracle:thin:@//QAORACLE11G.server.local/DatabaseName",
            "user": "QA_DBUSER",
            "password": "QA_DBPASSWORD"
        },

我的引用资料Oracle JDBC Connection URL