java.sql.SQLRecoverableException：错误：Ubuntu中端口号的数字格式无效

Question

I am using oracle 11g xe version.So i have established the classpath and went ahead for the program but was facing these errors:

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!!

Now i have not used any IDE's nor is it done in windows.I am trying to connect via linux terminal and all the help that is available is almost for Windows. The connection string i am using for the program is:

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

The code i am using is as follows:

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

I ran into this issue while using REST to connect and retrieve data from an Oracle DB.

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

These are all valid variations on the connection URL, but I eventually had to remove the port altogether.

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

My reference material Oracle JDBC Connection URL

Answer 2

Ok the difference was my connection string and i changed it to :

String jdbcUrl="jdbc:oracle:thin:@localhost:1521:xe";
String user="Sourajyoti";
String password="******";