给你一个:驱动程序A,数据源名称为B,用户名称为C,密码为D,数据库表为T,请用JDBC检索出表T的所有数据

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Conn {
    private String className = "A";
    private String url = "B";
    private String user = "C";
    private String password = "D";
    private Connection conn;
    private Statement st;
    private ResultSet rs;
    public Connection getConn() {
        try {
            Class.forName(className);
            conn = DriverManager.getConnection(url, user, password);
        } catch (ClassNotFoundException e) {
            // TODOAuto-generated catch block
            e.printStackTrace();
        } catch (SQLException e) {
            // TODOAuto-generated catch block
            e.printStackTrace();
        }
        return conn;
    }
    public ResultSet executeQuery(String sql) {
        try {
            st = conn.createStatement();
            rs = st.executeQuery(sql);
        } catch (SQLException e) {
            // TODOAuto-generated catch block
            e.printStackTrace();
        }
        return rs;
    }
    public static void main(String[] args) {
        Conn t = new Conn();
        ResultSet set = t.executeQuery("Select * from T");
    }
}