java连接oracle数据库验证

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class OracleJDBCExample {
    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;

        try {
            // 加载Oracle JDBC驱动
            Class.forName("oracle.jdbc.driver.OracleDriver");

            // 连接数据库
            String url = "jdbc:oracle:thin:@localhost:1521:orcl";
            String user = "username";
            String password = "password";
            conn = DriverManager.getConnection(url, user, password);

            // 创建Statement对象
            stmt = conn.createStatement();

            // 执行查询
            String sql = "SELECT * FROM employees";
            rs = stmt.executeQuery(sql);

            // 处理查询结果
            while (rs.next()) {
                System.out.println(rs.getString("employee_name"));
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (rs != null) rs.close();
                if (stmt != null) stmt.close();
                if (conn != null) conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}