我收到上面的错误。
我正在尝试做的是编写一个应用程序，它接收未知数量的名称，然后在新页面上打印出来。这应该是一个保龄球得分应用程序，但现在我只想得到一个名字列表。这个想法是让每个名字进入一个播放器对象，然后依次存储在播放器数组列表中。如果有人可以提供帮助，我将不胜感激。
这是我的控制器代码：
package multiplayergame;
import java.util.ArrayList;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.servlet.ModelAndView;
@Controller
@SessionAttributes
public class MultiplayerController {
int score;
int roll;
Game game = new Game();
GameProperties gameProps = new GameProperties();
int playerNo = 0;
ArrayList<PlayerGame> players = new ArrayList<>();
PlayerGame player;
@RequestMapping(value = "/home", method = RequestMethod.GET)
public ModelAndView home() {
return new ModelAndView("home", "command", gameProps);
}
@RequestMapping(value = "/nextName", method = { RequestMethod.POST, RequestMethod.GET})
public ModelAndView homeNext(MContact mcontact, BindingResult result) {
player = new PlayerGame();
player.setName(mcontact.getName());
players.add(player);
gameProps.setPlayers(players);
playerNo++;
return new ModelAndView("home", "command", gameProps);
}
@RequestMapping(value = "/test", method = RequestMethod.POST)
public ModelAndView playNext(GameProperties gameProps2, ModelMap model) {
model.addAttribute("players", gameProps.getPlayers());
model.addAttribute("name", gameProps.getPlayers().get(playerNo).getName());
return new ModelAndView("test", "players", gameProps2);
}
}
这包含每个玩家的详细信息：
package multiplayergame;
public class PlayerGame {
private int score;
private int pins;
private String name;
private int roll;
private int nOfPlayers;
private int playerNo;
Game game = new Game();
public Game getGame() {
return game;
}
public void setGame(Game game) {
this.game = game;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public int getPins() {
return pins;
}
public void setPins(int pins) {
this.pins = pins;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getRoll() {
return roll;
}
public void setRoll(int roll) {
this.roll = roll;
}
public int getnOfPlayers() {
return nOfPlayers;
}
public void setnOfPlayers(int nOfPlayers) {
this.nOfPlayers = nOfPlayers;
}
public int getPlayerNo() {
return playerNo;
}
public void setPlayerNo(int playerNo) {
this.playerNo = playerNo;
}
}
这是所有游戏属性的代码，例如得分等。
package multiplayergame;
import java.util.ArrayList;
public class GameProperties {
private int score;
private int pins;
private String name;
private int roll;
private int nOfPlayers;
PlayerGame player;
private ArrayList<PlayerGame> players;
private int playerNo;
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public int getPins() {
return pins;
}
public void setPins(int pins) {
this.pins = pins;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getRoll() {
return roll;
}
public void setRoll(int roll) {
this.roll = roll;
}
public int getnOfPlayers() {
return nOfPlayers;
}
public void setnOfPlayers(int nOfPlayers) {
this.nOfPlayers = nOfPlayers;
}
public ArrayList<PlayerGame> getPlayers() {
return players;
}
public void setPlayers(ArrayList<PlayerGame> players) {
this.players = players;
}
public int getPlayerNo() {
return playerNo;
}
public void setPlayerNo(int playerNo) {
this.playerNo = playerNo;
}
}
以下是我的 JSP 文件，输出优先：
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>Test output</title>
</head>
<body>
<h2>Test Roll</h2>
<c:forEach var="player" items="players">
Name <c:out value="${player.name}"/><p>
</c:forEach>
</body>
</html>
这是主页：
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Bowling</title>
</head>
<body>
<h2>Welcome players!</h2>
<h2>Please enter your names.</h2>
<form:form method="post" action="/multiplayergame/nextName">
<table>
<tr>
<td><form:label path="name">Name</form:label></td>
<td><form:input path="name" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" name = "button" value="Next Player"/>
</td>
</tr>
</table>
</form:form>
<form:form method="post" action="/multiplayergame/test">
<tr>
<td colspan="2">
<input type="submit" name = "button" value="Play"/>
</td>
</tr>
</form:form>
</body>
</html>