JDBC简单程序
这是我的简单JDBC程序,但我无法建立连接。类路径是用JDBC简单程序,jdbc,Jdbc,这是我的简单JDBC程序,但我无法建立连接。类路径是用ojdbc6.jar设置的 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
ojdbc6.jar
设置的
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");
}
}
这是我得到的输出和异常:
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)
线程“main”java.sql.SQLRecoverableException:Io异常:网络适配器无法建立连接
位于oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)
位于oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
位于oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
位于oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229)
位于oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458)
位于oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)
位于oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:490)
位于oracle.jdbc.driver.T4CConnection(T4CConnection.java:202)
位于oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)
位于oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:465)
位于java.sql.DriverManager.getConnection(未知源)
位于java.sql.DriverManager.getConnection(未知源)
位于Demo.JdbcDemo.main(JdbcDemo.java:13)
请检查以下内容