package jdbcconnection;
import java.sql.*;
public class Jdbc2{
public static void main(String[] args) throws Throwable {
//Resgister the driver through
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("registered driver successfully");
//Create the connection and assign to connection reference
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:CUSTDB", "scott", "tiger");
System.out.println("connection successsfully");
//create a statement through connection reference and assign to statement reference
Statement stmt=con.createStatement();
System.out.println("statement object created successfully");
//call the executequery method through statement reference and pass the query as argument.
ResultSet rs=stmt.executeQuery("select * from emp");
System.out.println("query is executed");
while(rs.next()){
int i=rs.getInt(1);
String str=rs.getString(2);
String str1=rs.getString(3);
int i1=rs.getInt(4);
System.out.println(i+"\t"+str+"\t"+str1+"\t"+i1);
}
}
}
错误 -
Exception in thread "main" java.sql.SQLException: Io exception: Invalid number format for port number
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:439)
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:801)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at jdbcconnection.Jdbc2.main(Jdbc2.java:13)