英文:
Required Long parameter 'flightId' is not present]
问题
*我面临着意外错误 (type=Bad Request, status=400)。在Spring日志中出现以下消息。 **所需的 Long 参数 'flightId' 不存在]***
*你知道这里出了什么问题吗？* 我仔细检查了所有文件，但无法弄清楚问题出在哪里。是控制器还是 Jsp？
*以下是所有的 Java 和 Jsp 文件。*
-----------------------------------------------------------------
**抽象实体**
package com.bharat.flightreservation.entities;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
@MappedSuperclass
public class AbstractEntity {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
------------------------------------
**航班控制器**
package com.bharat.flightreservation.controllers;
import java.util.Date;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.bharat.flightreservation.entities.Flight;
import com.bharat.flightreservation.repos.FlightRepository;
@Controller
public class FlightController {
@Autowired
FlightRepository flightRepository;
@RequestMapping("findFlights")
public String findFlights(@RequestParam("from") String from, @RequestParam("to") String to,
@RequestParam("departureDate") @DateTimeFormat(pattern="dd-MM-yyyy") Date departureDate,
ModelMap modelMap) {
List<Flight> flights = flightRepository.findFlights(from,to,departureDate);
modelMap.addAttribute("flights", flights);
return "displayFlights";
}
}
----------------------------
**预订控制器**
package com.bharat.flightreservation.controllers;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.bharat.flightreservation.entities.Flight;
import com.bharat.flightreservation.repos.FlightRepository;
@Controller
public class ReservationController {
@Autowired
FlightRepository flightRepository;
@RequestMapping("/showCompleteReservation")
public String showCompleteReservation(@RequestParam("flightId") Long flightId,ModelMap modelMap) {
Flight flight= flightRepository.getOne(flightId);
modelMap.addAttribute("flight", flight);
return "completeReservation";
}
}
------------------------------------------
**显示航班 JSP**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@page isELIgnored="false"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>航班详情</title>
</head>
<body>
<h2>航班：</h2>
<table>
<tr>
<th>航空公司</th>
<th>出发城市</th>
<th>到达城市</th>
<th>出发时间</th>
</tr>
<c:forEach items="${flights}" var="flight">
<tr>
<td>${flight.operatingAirlines}</td>
<td>${flight.departureCity}</td>
<td>${flight.arrivalCity}</td>
<td>${flight.estimatedDepartureTime}</td>
<td><a href="showCompleteReservation?id=${flight.id}">选择</a></td>
</tr>
</c:forEach>
</table>
</body>
</html>
-------------------------------------------
**完成预订 JSP**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@page isELIgnored="false"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>完成预订</title>
</head>
<body>
<h2>完成预订</h2>
航空公司：${flight.operatingAirlines}<br/>
出发城市：${flight.departureCity}<br/>
到达城市：${flight.arrivalCity}<br/>
<form action="completeReservation" method="post">
<pre>
<h2>乘客详情：</h2>
名字： <input type="text" name="passengerFirstName"/>
姓氏： <input type="text" name="passengerLastName"/>
电子邮件： <input type="text" name="passengerEmail"/>
电话： <input type="text" name="passengerPhone"/>
<h2>卡片详情：</h2>
卡片姓名： <input type="text" name="nameOnTheCard"/>
卡号： <input type="text" name="cardNumber"/>
到期日期： <input type="text" name="expirationDate"/>
三位安全码： <input type="text" name="securityCode"/>
<input type="hidden" name="flightId" value="${flight.id}"/>
<input type="submit" value="确认"/>
</pre>
</form>
</body>
</html>
------------------------------
**航班**
package com.bharat.flightreservation.entities;
import java.sql.Timestamp;
import java.util.Date;
import javax.persistence.Entity;
@Entity
public class Flight extends AbstractEntity {
private String flightNumber;
private String operatingAirlines;
private String departureCity;
private String arrivalCity;
private Date dateOfDeparture;
private Timestamp estimatedDepartureTime;
public String getFlightNumber() {
return flightNumber;
}
public void setFlightNumber(String flightNumber) {
this.flightNumber =
<details>
<summary>英文:</summary>
*I am facing There was an unexpected error (type=Bad Request, status=400). error and in spring log below message is appearing. **Required Long parameter 'flightId' is not present]***
*Any idea what is wrong here?* I check all files thoroughly but couldn't figure out where is problem. In controller or Jsp?
*Below are all java and jsp files.*
-----------------------------------------------------------------
**Abstract Entities**
package com.bharat.flightreservation.entities;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
@MappedSuperclass
public class AbstractEntity {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
------------------------------------
**Flight Controller**
package com.bharat.flightreservation.controllers;
import java.util.Date;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.bharat.flightreservation.entities.Flight;
import com.bharat.flightreservation.repos.FlightRepository;
@Controller
public class FlightController {
@Autowired
FlightRepository flightRepository;
@RequestMapping("findFlights")
public String findFlights(@RequestParam("from") String from, @RequestParam("to") String to,
@RequestParam("departureDate") @DateTimeFormat(pattern="dd-MM-yyyy") Date departureDate,
ModelMap modelMap) {
List<Flight> flights = flightRepository.findFlights(from,to,departureDate);
modelMap.addAttribute("flights", flights);
return "displayFlights";
}
}
----------------------------
**Reservaction Controller**
package com.bharat.flightreservation.controllers;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.bharat.flightreservation.entities.Flight;
import com.bharat.flightreservation.repos.FlightRepository;
@Controller
public class ReservationController {
@Autowired
FlightRepository flightRepository;
@RequestMapping("/showCompleteReservation")
public String showCompleteReservation(@RequestParam ("flightId") Long flightId,ModelMap modelMap) {
Flight flight= flightRepository.getOne(flightId);
modelMap.addAttribute("flight", flight);
return "completeReservation";
}
}
------------------------------------------
**Display Flights jsp**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@page isELIgnored="false"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Flight Details</title>
</head>
<body>
<h2>Flights:</h2>
<table>
<tr>
<th>Airlines</th>
<th>Departure City</th>
<th>Arrival City</th>
<th>Departure Time</th>
</tr>
<c:forEach items="${flights}" var="flight">
<tr>
<td>${flight.operatingAirlines}</td>
<td>${flight.departureCity}</td>
<td>${flight.arrivalCity}</td>
<td>${flight.estimatedDepartureTime}</td>
<td><a href="showCompleteReservation?id=${flight.id}">Select</a></td>
</tr>
</c:forEach>
</table>
</body>
</html>
-------------------------------------------
**Complete Reservation jsp**
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@page isELIgnored="false"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Complete Reservation</title>
</head>
<body>
<h2>Complete Reservation</h2>
Airline: ${flight.operatingAirlines}<br/>
Airline: ${flight.departureCity}<br/>
Airline: ${flight.arrivalCity}<br/>
<form action="completeReservation" method="post">
<pre>
<h2>Passenger Details:</h2>
First Name:<input type="text" name="passengerFirstName"/>
Last Name:<input type="text" name="passengerLastName"/>
Email:<input type="text" name="passengerEmail"/>
Phone:<input type="text" name="passengerPhone"/>
<h2>Card Details:</h2>
Name on the Card:<input type="text" name="nameOnTheCard"/>
Card Number:<input type="text" name="cardNumber"/>
Expiry Date:<input type="text" name="expirationDate"/>
Three Digit Sec Code:<input type="text" name="securityCode"/>
<input type="hidden" name="flightId" value="${flight.id}"/>
<input type="submit" value="confirm"/>
</pre>
</form>
</body>
</html>
------------------------------
**Flight**
package com.bharat.flightreservation.entities;
import java.sql.Timestamp;
import java.util.Date;
import javax.persistence.Entity;
@Entity
public class Flight extends AbstractEntity {
private String flightNumber;
private String operatingAirlines;
private String departureCity;
private String arrivalCity;
private Date dateOfDeparture;
private Timestamp estimatedDepartureTime;
public String getFlightNumber() {
return flightNumber;
}
public void setFlightNumber(String flightNumber) {
this.flightNumber = flightNumber;
}
public String getOperatingAirlines() {
return operatingAirlines;
}
public void setOperatingAirlines(String operatingAirlines) {
this.operatingAirlines = operatingAirlines;
}
public String getDepartureCity() {
return departureCity;
}
public void setDepartureCity(String departureCity) {
this.departureCity = departureCity;
}
public String getArrivalCity() {
return arrivalCity;
}
public void setArrivalCity(String arrivalCity) {
this.arrivalCity = arrivalCity;
}
public Date getDateOfDeparture() {
return dateOfDeparture;
}
public void setDateOfDeparture(Date dateOfDeparture) {
this.dateOfDeparture = dateOfDeparture;
}
public Timestamp getEstimatedDepartureTime() {
return estimatedDepartureTime;
}
public void setEstimatedDepartureTime(Timestamp estimatedDepartureTime) {
this.estimatedDepartureTime = estimatedDepartureTime;
}
@Override
public String toString() {
return "Flight [flightNumber=" + flightNumber + ", operatingAirlines=" + operatingAirlines + ", departureCity="
+ departureCity + ", arrivalCity=" + arrivalCity + ", dateOfDeparture=" + dateOfDeparture
+ ", estimatedDepartureTime=" + estimatedDepartureTime + "]";
}
}
----------------------------------------
**Reservation**
package com.bharat.flightreservation.entities;
import javax.persistence.Entity;
import javax.persistence.OneToOne;
@Entity
public class Reservation extends AbstractEntity {
private Boolean checkedIn;
private int numberOfBags;
@OneToOne
private Passenger passenger;
@OneToOne
private Flight flight;
public Boolean getCheckedIn() {
return checkedIn;
}
public void setCheckedIn(Boolean checkedIn) {
this.checkedIn = checkedIn;
}
public int getNumberOfBags() {
return numberOfBags;
}
public void setNumberOfBags(int numberOfBags) {
this.numberOfBags = numberOfBags;
}
public Passenger getPassenger() {
return passenger;
}
public void setPassenger(Passenger passenger) {
this.passenger = passenger;
}
public Flight getFlight() {
return flight;
}
public void setFlight(Flight flight) {
this.flight = flight;
}
@Override
public String toString() {
return "Reservation [checkedIn=" + checkedIn + ", numberOfBags=" + numberOfBags + ", passenger=" + passenger
+ ", flight=" + flight + "]";
}
}
</details>
# 答案1
**得分**: 1
你使用 `id` 请求参数调用你的端点
<td><a href="showCompleteReservation?id=${flight.id}">选择</a></td>
但是在你的控制器中我们可以看到 `flightId`
public String showCompleteReservation(@RequestParam ("flightId") Long flightId)
<details>
<summary>英文:</summary>
You call your endpoint with `id` request param
<td><a href="showCompleteReservation?id=${flight.id}">Select</a></td>
But in your controller we can see `flightId`
public String showCompleteReservation(@RequestParam ("flightId") Long flightId)
</details>
# 答案2
**得分**: 0
感谢亲爱的，将方法中的内容更改为使用 id 后，它成功运行了。
```java
@RequestMapping("/showCompleteReservation")
public String showCompleteReservation(@RequestParam("id") Long id, ModelMap modelMap) {
Flight flight = flightRepository.getOne(id);
modelMap.addAttribute("flight", flight);
return "completeReservation";
}
英文:
Thank Dear It worked after changing it to id in method.
@RequestMapping("/showCompleteReservation")
public String showCompleteReservation(@RequestParam ("id") Long id,ModelMap modelMap) {
Flight flight= flightRepository.getOne(id);
modelMap.addAttribute("flight", flight);
return "completeReservation";
}
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