0
这是我简单的JDBC程序，但我无法建立连接。课程路径设置为ojdbc6.jar。JDBC简单程序
package Demo;
import java.sql.*;
public class JdbcDemo {
public static void main(String[] args)throws Exception {
// TODO Auto-generated method stub
System.out.println("hi");
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("hi1");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:system","scott","tiger");
}
}
这是输出和异常我得到：
Exception in thread "main" java.sql.SQLRecoverableException: Io exception: The Network Adapter could not establish the connection
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:490)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:202)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:465)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Demo.JdbcDemo.main(JdbcDemo.java:13)