サーブレットでデータベースを読み込んで、データクラスを作ってArrayListに書き込みそれをjspファイルに渡して出力、ということをeclipse上でやりたいのですが、複数あるintのArrayListの値が正しく書き込まれません。StringのArrayListは正しく値が書き込まれて、出力されます。
サーブレット
java
1 2 3import java.io.IOException; 4import java.sql.Connection; 5import java.sql.DriverManager; 6import java.sql.ResultSet; 7import java.sql.SQLException; 8import java.sql.Statement; 9import java.util.ArrayList; 10import java.util.HashMap; 11import java.util.List; 12import java.util.Map; 13 14import javax.servlet.RequestDispatcher; 15import javax.servlet.ServletException; 16import javax.servlet.annotation.WebServlet; 17import javax.servlet.http.HttpServlet; 18import javax.servlet.http.HttpServletRequest; 19import javax.servlet.http.HttpServletResponse; 20 21/** 22 * Servlet implementation class DataBaseServer 23 */ 24@WebServlet("/DataBaseServer") 25public class DataBaseServer extends HttpServlet { 26 private static final long serialVersionUID = 1L; 27 28 /** 29 * @see HttpServlet#HttpServlet() 30 */ 31 public DataBaseServer() { 32 super(); 33 // TODO Auto-generated constructor stub 34 } 35 36 /** 37 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 38 */ 39 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 40 try { 41 Class.forName("com.mysql.jdbc.Driver"); 42 Connection conn = DriverManager.getConnection( 43 "jdbc:mysql://localhost:3306/record","xxx","xxxxx"); 44 45 //データの出力 46 Statement st = conn.createStatement(); 47 ResultSet rs = 48 st.executeQuery("select * from first"); 49 50 List<Integer> idList = new ArrayList<Integer>(); 51 List<String> nameList = new ArrayList<String>(); 52 List<Integer> jpnList = new ArrayList<Integer>(); 53 List<Integer> mathList = new ArrayList<Integer>(); 54 List<Integer> engList = new ArrayList<Integer>(); 55 List<Integer> sciList = new ArrayList<Integer>(); 56 57 /* 58 Map<String, ArrayList<Integer>> idMap = new HashMap<String, ArrayList<Integer>>(); 59 Map<String, ArrayList<String>> nameMap = new HashMap<String, ArrayList<String>>(); 60 Map<String, ArrayList<Integer>> jpnMap = new HashMap<String, ArrayList<Integer>>(); 61 Map<String, ArrayList<Integer>> mathMap = new HashMap<String, ArrayList<Integer>>(); 62 Map<String, ArrayList<Integer>> engMap = new HashMap<String, ArrayList<Integer>>(); 63 Map<String, ArrayList<Integer>> sciMap = new HashMap<String, ArrayList<Integer>>(); 64 */ 65 66 while(rs.next()) { 67 DataClass data = new DataClass(); 68 int id; 69 70 data.setId(rs.getInt("id")); 71 data.setName(rs.getString("name")); 72 data.setId(rs.getInt("jpn")); 73 data.setId(rs.getInt("math")); 74 data.setId(rs.getInt("eng")); 75 data.setId(rs.getInt("sci")); 76 77 id = data.getId(); 78 idList.add(data.getId()); 79 nameList.add(data.getName()); 80 jpnList.add(data.getJpn()); 81 mathList.add(data.getMath()); 82 engList.add(data.getEng()); 83 sciList.add(data.getSci()); 84 } 85 86 /* 87 idMap.put("1", idList); 88 nameMap.put("2", nameList); 89 jpnMap.put("3", jpnList); 90 mathMap.put("4", mathList); 91 engMap.put("5", engList); 92 sciMap.put("6", sciList); 93 94 System.out.println(idMap.get("1")); 95 */ 96 97 request.setAttribute("1", idList); 98 request.setAttribute("2", nameList); 99 request.setAttribute("3", jpnList); 100 request.setAttribute("4", mathList); 101 request.setAttribute("5", engList); 102 request.setAttribute("6", sciList); 103 RequestDispatcher dispatcher = request.getRequestDispatcher("/Receiver.jsp"); 104 dispatcher.forward(request, response); 105 106 107 } catch (ClassNotFoundException e) { 108 System.out.println("ドライバを読み込めませんでした "+ e); 109 } catch (SQLException e) { 110 System.out.println("データベース接続エラー"+ e); 111 112 113 114 } 115 } 116 117 /** 118 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 119 */ 120 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 121 // TODO Auto-generated method stub 122 doGet(request, response); 123 } 124 125} 126
データクラス
java
1import java.text.SimpleDateFormat; 2 3public class DataClass { 4 5 private int id; 6 private String name; 7 private int jpn; 8 private int math; 9 private int eng; 10 private int sci; 11 12 /*Date型を合わせる 13 SimpleDateFormat sqlDate = new SimpleDateFormat("yyyy/MM/dd"); 14 Date created = new 15 */ 16 17 public void setId(int id) { 18 this.id=id; 19 } 20 21 public int getId() { 22 return id; 23 } 24 25 public void setName(String name) { 26 this.name=name; 27 } 28 29 public String getName() { 30 return name; 31 } 32 33 public void setJpn(int jpn) { 34 this.jpn=jpn; 35 } 36 37 public int getJpn() { 38 return jpn; 39 } 40 41 public void setMath(int math) { 42 this.math=math; 43 } 44 45 public int getMath() { 46 return math; 47 } 48 49 public void setEng(int eng) { 50 this.eng=eng; 51 } 52 53 public int getEng() { 54 return eng; 55 } 56 57 public void setSci(int sci) { 58 this.jpn=jpn; 59 } 60 61 public int getSci() { 62 return sci; 63 } 64} 65
jspファイル
java
1<%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3<%@ page import="javax.servlet.http.*,javax.servlet.*" %> 4<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 5<%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql" %> 6<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 7<html> 8<head> 9<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 10<title>Insert title here</title> 11</head> 12<body> 13 <%=request.getAttribute("1") %> 14 <%=request.getAttribute("2") %> 15 <%=request.getAttribute("3") %> 16 <%=request.getAttribute("4") %> 17 <%=request.getAttribute("5") %> 18 <%=request.getAttribute("6") %> 19</body> 20</html>
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