eclipse中的JDBC CONNECTION ERROR

Question

我正在尝试通过Eclipse连接到我们的oracle数据库。我有以下包裹。

我们在Oracle 11g     Java 1.7     我已经下载了ojdbc7.jar驱动程序并将其放在类路径中。

 //connection code
package testConnect;
import java.sql.*;
import oracle.jdbc.OracleDriver;

public class JdbcThinTnsNamesTest {
    public JdbcThinTnsNamesTest() {
        System.setProperty("oracle.net.tns_admin",
                "$TNS_ADMIN");
    }

    public static Connection getConnection() throws SQLException {
        String username = "user";
        String password = "password";
        String thinConn = "jdbc:oracle:thin:@//NCPP";
        DriverManager.registerDriver(new OracleDriver());
        Connection conn = DriverManager.getConnection(thinConn, username,
                password);
        conn.setAutoCommit(false);
        return conn;
    }
    //
    public void run() throws SQLException {
        Connection conn = getConnection();
        System.out.println("Auto Commit = " + conn.getAutoCommit());
        conn.close();
    }

    public static void main(String[] args) {
        JdbcThinTnsNamesTest test = new JdbcThinTnsNamesTest();
        try {
            test.run();
            System.out.println("all done..");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

}
//

但我一直收到以下错误：

        java.sql.SQLException: No suitable driver found for jdbc:oracle:thin:@//NCPP
  at java.sql.DriverManager.getConnection(DriverManager.java:596)
  at java.sql.DriverManager.getConnection(DriverManager.java:215)
  at testConnect.JdbcThinTnsNamesTest.getConnection(JdbcThinTnsNamesTest.java:17)
  at testConnect.JdbcThinTnsNamesTest.run(JdbcThinTnsNamesTest.java:24)
  at testConnect.JdbcThinTnsNamesTest.main(JdbcThinTnsNamesTest.java:32)

不确定这是Eclipse问题，我的代码还是两者兼而有之。