質問編集履歴
2
サーブレット側のソースコードとパッケージの関連図を追記しました。
test
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主要ファイルの拡大図
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### 発生している問題・エラーメッセージ
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ブラウザから動作させると該当のレコードは取得できています。が、画像が表示できておりません。
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■product.jsp
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```jsp
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<%@ page language="java" contentType="text/html; charset=UTF-8"
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①FrontController
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```java
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package tool;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.lang.reflect.Constructor;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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@WebServlet(urlPatterns= {"*.action"})
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public class FrontController extends HttpServlet {
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public void doPost(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException {
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PrintWriter out = response.getWriter();
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try {
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String path = request.getServletPath().substring(1);
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String name = path.replace(".a","A").replace('/', '.');
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//ProductActionを生成
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Class<?> action = null;
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action = Class.forName(name);
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Constructor constructor = action.getDeclaredConstructor();
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FrontAction faction = (FrontAction) constructor.newInstance();
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String url = faction.execute(request,response);
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request.getRequestDispatcher(url).forward(request, response);
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} catch ( Exception e) {
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e.printStackTrace(out);
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}
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}
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public void doGet(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException {
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doPost(request,response);
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}
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}
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```
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②ProductAction
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```Java
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package purchase;
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import java.util.List;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import bean.Product;
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import dao.ProductDAO;
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import tool.FrontAction;
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public class ProductAction extends FrontAction {
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public String execute (HttpServletRequest request,
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HttpServletResponse response)
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throws Exception {
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HttpSession session=request.getSession();
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String keyword = request.getParameter("keyword");
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if (keyword==null) keyword="";
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ProductDAO dao=new ProductDAO();
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List<Product> list=dao.search(keyword);
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session.setAttribute("list", list);
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return "product.jsp";
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}
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}
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```
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③FrontAction
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```java
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package tool;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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public abstract class FrontAction {
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public abstract String execute (HttpServletRequest request,
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HttpServletResponse response) throws Exception ;
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}
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```
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④ProductDAO
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```java
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package dao;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.util.ArrayList;
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import java.util.List;
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import bean.Product;
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public class ProductDAO extends DAO {
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public List<Product> search(String keyword) throws Exception {
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List<Product> list=new ArrayList<>();
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Connection con = getConnection();
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PreparedStatement st = con.prepareStatement(
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359
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"select * from product where name like ?");
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360
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361
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st.setString(1, "%"+keyword+"%");
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ResultSet rs = st.executeQuery();
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while(rs.next()) {
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Product p=new Product();
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p.setId(rs.getInt("id"));
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p.setName(rs.getString("name"));
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p.setPrice(rs.getInt("price"));
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list.add(p);
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}
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st.close();
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con.close();
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385
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return list;
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386
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387
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}
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388
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389
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}
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390
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391
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```
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392
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393
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⑤DAO
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394
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395
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```java
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396
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397
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package dao;
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398
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399
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import java.sql.Connection;
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400
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401
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import javax.naming.InitialContext;
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402
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403
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import javax.sql.DataSource;
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404
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405
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406
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407
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public class DAO {
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408
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409
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static DataSource ds;
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410
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411
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412
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413
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public Connection getConnection() throws Exception {
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414
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415
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if (ds==null) {
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416
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417
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InitialContext ic=new InitialContext();
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418
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419
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ds=(DataSource)ic.lookup("java:/comp/env/jdbc/SampleDB");
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420
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421
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}
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422
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423
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return ds.getConnection();
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424
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425
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}
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426
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427
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}
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428
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429
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430
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431
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```
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432
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+
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433
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434
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435
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⑥Product
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436
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437
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```java
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438
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439
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package bean;
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440
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441
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+
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442
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+
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443
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public class Product implements java.io.Serializable{
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444
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445
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private int id;
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446
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447
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private String name;
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448
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+
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449
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private int price;
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450
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+
|
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451
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+
|
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452
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+
|
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453
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public int getId() {
|
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454
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+
|
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455
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+
return id;
|
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456
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+
|
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457
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+
}
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458
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+
|
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459
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+
|
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460
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+
|
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461
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public String getName ( ) {
|
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462
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+
|
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463
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+
return name;
|
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464
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+
|
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465
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+
}
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466
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+
|
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467
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+
|
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468
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+
|
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469
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public int getPrice() {
|
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470
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+
|
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471
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return price;
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472
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+
|
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473
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+
}
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474
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+
|
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475
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+
|
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476
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+
|
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477
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public void setId(int id) {
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478
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+
|
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479
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this.id = id;
|
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480
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+
|
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481
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+
}
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482
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+
|
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483
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+
|
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484
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+
|
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485
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public void setName(String name) {
|
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486
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+
|
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487
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this.name = name;
|
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488
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+
|
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489
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+
}
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490
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+
|
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491
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+
|
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492
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+
|
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493
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public void setPrice(int price) {
|
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494
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+
|
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495
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this.price = price;
|
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496
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+
|
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497
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+
}
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498
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+
|
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499
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+
}
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|
500
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+
|
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501
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+
```
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502
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+
|
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503
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+
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504
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+
|
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505
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②のjspを返却する前のリストの値をウオッチで値を確認したら以下のようになっております。
|
|
506
|
+
|
|
507
|
+
session.setAttribute("list", list);
|
|
508
|
+
|
|
509
|
+
＜検索値にまぐろを設定＞
|
|
510
|
+
|
|
511
|
+
id：1
|
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512
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+
|
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513
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name：まぐろ
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514
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+
|
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515
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price：100
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516
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+
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153
517
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154
518
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155
519
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### 試したこと
|
1
Eclipseの表記に誤字があった為に修正致しました。
test
CHANGED
|
File without changes
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test
CHANGED
|
@@ -1,6 +1,6 @@
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1
1
|
### 前提・実現したいこと
|
|
2
2
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|
|
3
|
-
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|
3
|
+
Eclipseでショッピングサイトの構築を学習しておりDBから取得した情報をビューとして
|
|
4
4
|
|
|
5
5
|
ブラウザに表示させようと考えております。具体的には以下の[現在の構成]の中の「puroduct.jsp」を実行し
|
|
6
6
|
|