in context with path とエラーが出る

Question

最近JSP/Servletの勉強を始めました。
エラーがでて行き詰まっているので質問します。

以下のようなエラーが出ます。
Servlet.service() for servlet [servlet.TEST] in context with path [/sample001] threw exception [サーブレットの実行により例外を投げました] with root cause

Servlet

import java.io.IOException;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import dao.t_productDAO;
import model.t_product;

@WebServlet("/TEST")
public class TEST extends HttpServlet {
	private static final long serialVersionUID = 1L;

    public TEST() {
        super();

    }
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.getWriter().append("Served at: ").append(request.getContextPath());

		t_productDAO t_product = new t_productDAO();
		List<t_product>productList = t_product.findAll();
		request.setAttribute("productList", productList);

		RequestDispatcher rd = request.getRequestDispatcher("/test2.jsp" );
		 rd.forward(request,response);

	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
		request.setCharacterEncoding("UTF-8");
	}
}

DAO

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import model.t_product;

public class t_productDAO {
	
	private final String driver = "com.mysql.jdbc.Driver";
	private final String url = "jdbc:mysql://localhost/wbr_inventory_control?characterEncoding=UTF-8&serverTimezone=JST";
	private final String user = "testuser";
	private final String password = "pass";

	public List<t_product> findAll() {
		Connection conn = null;
		List<t_product>productList = new ArrayList<t_product>();//リスト名（リスト作成

		try {
			//JDBCドライバを読み込み
			Class.forName(driver);

			//データベースへの接続
			conn = DriverManager.getConnection(url,user,password);

			//SELECT文を準備
			String sql = "SELECT * FROM t_product";
			PreparedStatement pstmt = conn.prepareStatement(sql);

			//SElECT文を実行し、結果を取得
			ResultSet rs = pstmt.executeQuery();
			
			while(rs.next()) { //select文の結果をArrayListに格納
				int product_id = rs.getInt("product_id");
				String product_genre_code = rs.getString("product_genre_code");
				String product_name = rs.getString("product_name");
				String product_maker = rs.getString("product_maker");
				int product_price = rs.getInt("product_price");
				int product_stock = rs.getInt("product_stock");
				int product_sales = rs.getInt("product_sales");
				String product_remarks = rs.getString("product_remarks");

				t_product T_product = new t_product(product_id,product_genre_code,product_name
						,product_maker,product_price,product_stock,product_sales,product_remarks);
				productList.add(T_product);

			}

		}catch(SQLException e) { 
			e.printStackTrace();
			return null;
		} catch (ClassNotFoundException e) { 
			e.printStackTrace();
			return null;
		}finally { //catchがなくても必ず実行
			//データベース切断
			if(conn != null) {
				try {
					conn.close();
				}catch(SQLException e) {
					e.printStackTrace();
					return null;
				}
			}
		}
	    return productList;
	}
}

model

import java.io.Serializable;

public class t_product implements Serializable{

	private int product_id;
	private String product_genre_code;
	private String product_name;
	private String product_maker;
	private int product_price;
	private int product_stock;
	private int product_sales;
	private String product_remarks;

	public t_product(int product_id
			,String product_genre_code,String product_name
			,String product_maker, int product_price,int product_stock,int product_sales,String product_remarks) {


		this.product_id = product_id;
		this.product_genre_code = product_genre_code;
		this.product_name = product_name;
		this.product_maker = product_maker;
		this.product_price = product_price;
		this.product_stock = product_stock;
		this.product_sales = product_sales;
		this.product_remarks = product_remarks;


	}
	public int getproduct_id() {return product_id;}
	public String getproduct_genre_code() {return product_genre_code;}
	public String getproduct_name() {return product_name;}
	public String getproduct_maker() {return product_maker;}
	public int getproduct_price() {return product_price;}
	public int getproduct_stock() {return product_stock;}
	public int getproduct_sales() {return product_sales;}
	public String getproduct_remarks() {return product_remarks;}

	}

ご回答いただけると幸いです。
何卒宜しくお願い致します。

Comments

[A-pZ]

エラーが出ているときのスタックトレースがあると回答が得られるかもしれません。コンパイルエラーがある場合はコンパイルエラーを解消してください。