oracle.jdbc.driver连接数据库

package org.zjy.util;

import java.sql.*;
import java.util.List;

import oracle.jdbc.driver.OracleDriver;

public class DBUtil {
private static Connection conn = null;
  /*private static final String driver = "com.mysql.jdbc.Driver";
private static final String dbURL = "jdbc:mysql://localhost:3306/studb";
private static final String user = "root";
private static final String password = "123456";*/
private static final String driver = "oracle.jdbc.driver.OracleDriver";
private static final String dbURL = "jdbc:oracle:thin:@localhost:1521:ORCL";
private static final String user = "admin";
private static final String password = "admin";
public static Connection getConnection() {
try {
if (conn == null || conn.isClosed()) {
Class.forName(driver);
conn = DriverManager.getConnection(dbURL, user, password);
}
} catch (Exception ex) {
ex.printStackTrace();
}
return conn;
}
public static ResultSet executeQuery(String sql) {
Connection c = getConnection();
ResultSet set = null;
try {
Statement st = c.createStatement();
set = st.executeQuery(sql);
} catch (Exception ex) {
ex.printStackTrace();
}
return set;
}
public static int executeUpdate(String sql) {
Connection c = getConnection();
int i = 0;
try {
Statement st = c.createStatement();
i = st.executeUpdate(sql);
} catch (Exception ex) {
ex.printStackTrace();
}
return i;
}
public static void main(String[] args) {

System.out.println(getConnection());
// ControlDB db = new ControlDB();
// String sql = "select * from stuinfo";
// List list = db.executeQueryStuinfo(sql);
// System.out.println(list.size());

}
}