04_web Basic (eight) tickets for the implementation of additions and deletions to check the primary version

Last Update:2018-05-08 Source: Internet

Author: User

Tags ticket

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43.web page shows the ticket list is completed briefly

Code:

Control Layer Code

1  PackageCom.day03.station.controller;2 3 ImportCom.day03.station.model.Ticket;4 ImportCom.day03.station.service.impl.TicketService;5 6 Importjavax.servlet.ServletException;7 ImportJavax.servlet.annotation.WebServlet;8 ImportJavax.servlet.http.HttpServlet;9 Importjavax.servlet.http.HttpServletRequest;Ten ImportJavax.servlet.http.HttpServletResponse; One Importjava.io.IOException; A Importjava.util.List; -  - /** the * Course notes:http://www.cnblogs.com/newAndHui/category/1153640.html - * Inquiry wx:851298348 -  */ -@WebServlet ("/list") +  Public classTicketlistservletextendsHttpServlet { -     //Business Objects +     PrivateTicketservice ticketservice=NewTicketservice (); A     /** at * Check Ticket list -      * @paramreq -      * @paramresp -      * @throwsservletexception -      * @throwsIOException -      */ in @Override -      Public voidService (HttpServletRequest req, HttpServletResponse resp)throwsservletexception, IOException { to         //1. Receiving Parameters +         //2. Calling the Business method -list<ticket> list =Ticketservice.queryall (); theReq.setattribute ("list", list); *         //3. Control Jump $Req.getrequestdispatcher ("/web-inf/views/ticketlist.jsp"). Forward (REQ,RESP);Panax Notoginseng  -     } the}

Ticketlistservlet

JSP code

1<%@ page contenttype= "Text/html;charset=utf-8" language= "java" pageencoding= "UTF-8"%>234<title> Ticket list </title>56<body>7 I am the Ticket list page8 ${list}9<%--Ten Table Labels OneLine <tr> AColumns <td> ---%> -<table align= "Center" border= "1" > the<tr> -<td> numbering </td> -<td>start_station</td> -<td>stop_station</td> +<td>start_time</td> -<td>ticket_price</td> +</tr> A<tr> at<td>${list[0].id}</td> -<td>${list[0].startStation}</td> -<td>${list[0].stopStation}</td> -<td>${list[0].startTime}</td> -<td>${list[0].ticketPrice}</td> -</tr> in<tr> -<td>${list[1].id}</td> to<td>${list[1].startStation}</td> +<td>${list[1].stopStation}</td> -<td>${list[1].startTime}</td> the<td>${list[1].ticketPrice}</td> *</tr> $<tr>Panax Notoginseng<td>${list[2].id}</td> -<td>${list[2].startStation}</td> the<td>${list[2].stopStation}</td> +<td>${list[2].startTime}</td> A<td>${list[2].ticketPrice}</td> the</tr> +  -</table> $</body> $ticketlist.jsp44.web page Show ticket list implementation
　1. Preparation before using the C tag
To completely eliminate Java code in the JSP, learn the Java tag Library:
Java Tag Library:
Standard Tag Library (JSTL). (Sun pre-provided good, we use.)
When you learn the MVC Framework (STRUTS2/SPRINGMVC) Later, you will learn a set of tags.
=====================================================================
Get ready:
1: Prepare the JSTL related jar (tomcat root/webapps/examples/web-inf/lib).
Jstl.jar Standard.jar
El-api.jar Jsp-api.jar

2: Using Jstl jsp page, inductive tag library:
such as inductive core JSTL:
<%@ taglib uri= "Http://java.sun.com/jsp/jstl/core" prefix= "C"%>
3: Note: Some idea does not add a C tag library, so you must manually add
2.ide Configuration
　　
　　
　　
JSP Code:
1 <%@ Page ContentType="Text/html;charset=utf-8"language="Java"pageencoding="UTF-8" %>2 <%@ taglib URI="Http://java.sun.com/jsp/jstl/core"prefix="C"%>3 <HTML>4 <Head>5     <title>Ticket List</title>6 </Head>7 <Body>8 I am the Ticket list page9 Ten <%-- One Table Labels A Line<TR> - column<TD> - --%> the <TableAlign= "Center"Border= "1"> -     <TR> -         <TD>Number</TD> -         <TD>Start_station</TD> +         <TD>Stop_station</TD> -         <TD>Start_time</TD> +         <TD>Ticket_price</TD> A     </TR> at    <C:foreachItems= "${list}"var= "Ticket"> -       <TR> -           <TD>${ticket.id}</TD> -           <TD>${ticket.startstation}</TD> -           <TD>${ticket.stopstation}</TD> -           <TD>${ticket.starttime}</TD> in           <TD>${ticket.ticketprice}</TD> -       </TR> to    </C:foreach> +  - </Table> the </Body> * </HTML>
View Code
04_web Basic (eight) tickets for the implementation of additions and deletions to check the primary version

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