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

package dao;

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

public class Test {
private String className="A";
private String url="B";
private String user="C";
private String password="D";
private Connection connection;
private Statement statement;
private ResultSet resultSet;

public Connection getConn() {
try {
Class.forName(className);
connection = DriverManager.getConnection(url, user, password);
} catch (ClassNotFoundException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
} catch (SQLException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
return connection;
}

public ResultSet executeQuery(String sql) {
connection=getConn();
try {