我想从jsp恢复日期（日期和月份）和电影院后，通过sql查询将这些参数传输到数据库oracle。通过调试检查，查询不会产生任何类型的错误，但是同时（result.next（））不会填充3个数组（filmArray，roomArray和dataArray）。 我在 else if（Cinema！= null && month！= null && day！= null）{
很明显，对于我输入的参数，通过查询可以得到一些结果，但未显示... 我在所有其他servlet上都遇到这种问题，我可以进行插入或仅选择不带where子句，因此只能用于简单查询。
package cinema;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.util.Calendar;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class ScheduleCinema
*/
@WebServlet("/ScheduleCinema")
public class ScheduleCinema extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public ScheduleCinema() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String user = "cinema";
String pass = "cinema";
String sid = "orcl";
String host = "localhost";
int port = 1521;
response.getWriter().append("Served at: ").append(request.getContextPath());
String url = "jdbc:oracle:thin:@" + host + ":" + port + ":" + sid;
System.out.println(url);
ArrayList<String> CinemaArray = new ArrayList<>();
String Cinema=request.getParameter("cinema");
String day= request.getParameter("day");
String month= request.getParameter("month");
String year= request.getParameter("year");
//String data2 = day +"-"+ month +"-"+ year + " 11:00:00 PM";
ArrayList<String> dataArray = new ArrayList<>();
ArrayList<String> filmArray = new ArrayList<>();
ArrayList<String> roomArray = new ArrayList<>();
try
{
if(Cinema == null){
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection(url, user, pass);
PreparedStatement pstmt=conn.prepareStatement("select nome from cinema_tab");
ResultSet result= pstmt.executeQuery();
response.setContentType("text/html");
PrintWriter out= response.getWriter();
while (result.next())
{
CinemaArray.add(result.getString("nome"));
}
request.setAttribute("cinemaArray", CinemaArray);
result.close();
pstmt.close();
conn.close();
request.getRequestDispatcher("/ScheduleCinema.jsp").forward(request, response);
}else if(Cinema != null && month != null && day != null){
CinemaArray.clear();
CinemaArray.add(Cinema);
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection(url, user, pass);
PreparedStatement pstmt=conn.prepareStatement("select title, room, datahour from view_palinstesto_hour where mon=? and dd=? and nomecinema=?");
pstmt.setString(1, month);
pstmt.setString(2, day);
pstmt.setString(3, Cinema);
ResultSet result= pstmt.executeQuery();
//response.setContentType("text/html");
response.getWriter();
while (result.next())
{
filmArray.add(result.getString("title"));
dataArray.add(result.getString("datahaur"));
roomArray.add(result.getString("room"));
}
request.setAttribute("cinemaArray", CinemaArray);
request.setAttribute("filmArray", filmArray);
request.setAttribute("dataArray", dataArray);
request.setAttribute("roomArray", roomArray);
result.close();
pstmt.close();
conn.close();
request.getRequestDispatcher("/ScheduleCinema.jsp").forward(request, response);
}
}
catch(ClassNotFoundException e){
throw new ServletException(e);
}
catch(SQLException e){
throw new ServletException(e);
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
我真的无法弄清楚问题出在哪里以及在哪里。 如果我还要输入相应的JSP页面的代码。
<%@page
import="jdk.nashorn.internal.objects.annotations.SpecializedFunction"%>
<%@page import="java.util.ArrayList"%>
<%@page import="cinema.ScheduleCinema"%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.util.Calendar" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Schedule | Cinema </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="description" content="Place your description here" />
<meta name="keywords" content="put, your, keyword, here" />
<meta name="author" content="Templates.com - website templates provider" />
<link href="style.css" rel="stylesheet" type="text/css" />
<script src="js/jquery-1.4.2.min.js" type="text/javascript"></script>
<script src="js/cufon-yui.js" type="text/javascript"></script>
<script src="js/cufon-replace.js" type="text/javascript"></script>
<script src="js/Gill_Sans_400.font.js" type="text/javascript"></script>
<script src="js/script.js" type="text/javascript"></script>
<!--[if lt IE 7]>
<script type="text/javascript" src="js/ie_png.js"></script>
<script type="text/javascript">
ie_png.fix('.png, .link1 span, .link1');
</script>
<link href="ie6.css" rel="stylesheet" type="text/css" />
<![endif]-->
</head>
<body id="page5">
<div class="tail-top">
<div class="tail-bottom">
<div id="main">
<!-- HEADER -->
<div id="header">
<div class="row-1">
<div class="fleft"><a href="index.html">Cinema <span>World</span></a></div>
<ul>
<li><a href="index.html"><img src="images/icon1.gif" alt="" /></a></li>
<li><a href="contact-us.html"><img src="images/icon2-act.gif" alt="" /></a></li>
<li><a href="sitemap.html"><img src="images/icon3.gif" alt="" /></a></li>
</ul>
</div>
<div class="row-2">
<ul>
<li><a href="index.html">Index</a></li>
<li><a href="Ticket" >Ticket</a></li>
<li><a href="InsertFilm.jsp" >InsertFilm</a></li>
<li><a href="NewFilmScreening" >NewScreening</a></li>
<li><a href="SearchScreening" >Search Screening</a></li>
<li><a href="ScheduleCinema" class="active" >Schedule Cinema</a></li>
</ul>
</div>
</div>
<!-- CONTENT -->
<br>
<br></br></br>
<div id="content">
<div class="line-hor"></div>
<div class="box">
<div class="border-right">
<div class="border-left">
<div class="inner">
<h3><span> Search Schedule</span></h3>
</div>
</div>
</div>
</div>
<div class="content">
<%
ArrayList<String>cinema=(ArrayList<String>) request.getAttribute("cinemaArray");
// print the information about every category of the list
if(cinema.size()>1){
%>
<form id="cinemaSelection" action="ScheduleCinema" >
<fieldset>
<div class="field"><label><br></br>Select Cinema: </label>
<select name="cinema" >
<option> Select Cinema </option>
<%
for(int k= 0; k < cinema.size() ; k++) {
%>
<option value="<% out.println(cinema.get(k)); %>"> <% out.println(cinema.get(k)); %></option>
<%
}
%>
</select>
<label> Day ->
</label>
<select name="day">
<%
Calendar now = Calendar.getInstance();
for(int k=1; k<= 31 ; k++){
%>
<option value= <% out.println(k); %>> <% out.println(k); %></option>
<%
}
%>
</select>
<label> Month ->
</label>
<select name="month" value=<% out.println(now.get(Calendar.MONTH)); %>>
<option value="1"> 1 </option>
<option value="2"> 2 </option>
<option value="3"> 3 </option>
<option value="4"> 4 </option>
<option value="5"> 5 </option>
<option value="6"> 6 </option>
<option value="7"> 7 </option>
<option value="8"> 8 </option>
<option value="9"> 9 </option>
<option value="10"> 10 </option>
<option value="11"> 11 </option>
<option value="12"> 12 </option>
</select>
<label> Year ->
</label>
<select name="year" value=<% out.println(now.get(Calendar.YEAR)); %>>
<%
for(int k=2019; k<= 2020 ; k++){
%>
<option value= <% out.println(k); %>> <% out.println(k); %></option>
<%
}
%>
</select>
<br></br>
<input type="reset" value="Resetta il form">
<input type="submit" value="Invia">
</div>
</fieldset>
</form>
<%
}else if( cinema.size()==1){
ArrayList<String>data=(ArrayList<String>) request.getAttribute("dataArray");
ArrayList<String>film=(ArrayList<String>) request.getAttribute("filmArray");
ArrayList<String>room=(ArrayList<String>) request.getAttribute("roomArray");
%>
<table>
<tr>
<td><h3>Room</h3></td> <td></td> <td><h3>Film </h3></td> <td></td> <td><h3>Data </h3></td>
</tr>
<%
for(int i=0; i< data.size();i++){
%>
<tr><td><% out.println(room.get(i));%></td> <td></td> <td><% out.println(film.get(i));%></td> <td></td> <td><% out.println(data.get(i));%></td></tr>
<%
}
%>
</table>
<br></br>
<div class="wrapper">
<a href="SearchScreening" class="link2">
<span>
<span>Reset</span>
</span>
</a>
</div>
<%
}
%>
</div>
</div>
</div>
<!-- FOOTER -->
<div id="footer">
<div class="left">
<div class="right">
<div class="inside">Copyright - Type in your name here<br />
Website template designed by <a class="new_window" href="http://www.templatemonster.com/" target="_blank" rel="nofollow">www.templatemonster.com</a><br />
3D Models provided by <a class="new_window" href="http://www.templates.com/product/3d-models/" target="_blank" rel="nofollow">www.templates.com</a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script type="text/javascript"> Cufon.now(); </script>
</body>
</html>