在连接到oracle 10g数据库时，获取IOException“从读取调用中减去一个”

Question

getting IOException while connecting to oracle 10g database:-

Exception in thread "main" java.sql.SQLException: Io exception: Got minus one from a read call

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:145)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:190)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:363)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:401)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:441)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:839)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at com.myapp.struts.DBConnection.getDBConnection(DBConnection.java:21)
at com.myapp.struts.DBConnection.main(DBConnection.java:31)

Java Result: 1

my class code is following:-

package com.myapp.struts;

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

public class DBConnection {
    Connection connection = null;
    public Connection getDBConnection()throws Exception{
    Class.forName("oracle.jdbc.driver.OracleDriver");
    System.out.println("OUTPUUT     ********driver registered");
    connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","system","system");
    System.out.println("OUTPUUT     ********connection established");
    return connection;

    }
    public static void main(String args[])throws Exception{
        DBConnection db = new DBConnection();
        ResultSet result = null;
        String query = "SELECT * FROM admin;";
        Connection con = null;
        con = db.getDBConnection();
        System.out.println("OUTPUUT     ********111111111");
        Statement st =con.createStatement();
        result = (ResultSet) st.executeQuery(query);
        while(result.next()){
            System.out.println("OUTPUUT     ********");
            System.out.println(result.getInt(1));
            System.out.println(result.getString(2));
            System.out.println(result.getString(3));
            System.out.println(result.getString(4));
        }
        con.close();


    } 
}

AND one more thing i am using netbeans ide and developing a struts project. Struggling with this problem from last two days but yet to get the solution.

Please help????

Answer 1

if Facing problem to connect with Oracle 10g using JDBC, try below things: 1. turn off your machines's Wi-fi. 2. Stop Oracle Service. 3. Start Oracle Service. Now try to connect with DataBase using JDBC. Problem will be resolved now.

Answer 2

尝试在查询结束时删除分号

String query = "SELECT * FROM admin";

Answer 3

I got the problem solved just by replacing the connection url as: connection = DriverManager.getConnection("jdbc:oracle:thin:@//127.0.0.1:1521/XE","system","sy‌​stem"); thanks to everyone for your support.

Answer 4

Try this url instead

"jdbc:oracle:thin:@//localhost:1521/XE" 

or, "jdbc:oracle:thin:@//localhost:1521/xe"

You might also want to try this to track down your problem -

1. Remove the following while section temporarily

     while(result.next()){ System.out.println("OUTPUUT ********"); System.out.println(result.getInt(1)); System.out.println(result.getString(2)); System.out.println(result.getString(3)); System.out.println(result.getString(4)); } 

2. add this in place of the while loop - result.first();
3. add this too after that - System.out.println(result.getString(1));
4. Check if you have any exception now
5. If you don't get exception, I think, you are having issues with one or more or more of the result.getXXX() functions inside the while loop.

Is a kind of trial and error answer.

Hope this helps.

Answer 5

如果执行数据库关闭命令，则它将不再允许新连接，并且将出现此错误。

Answer 6

我也遇到了同样的问题，我通过将8080端口替换为1521来解决它问题谢谢大家对我这样的初学者都做得很好