spring javax.el.PropertyNotFoundException：在类型 java.lang.String 上找不到属性“名称”

javax.el.PropertyNotFoundException: Property 'name' not found on type java.lang.String

提问by jchoran

I'm getting the error above.

我收到上面的错误。

What i'm trying to do is write an app that takes in an unknown number of names, then prints them out on a new page. This is supposed to be for a bowling scoring app, but for now I just want to get a list of names. The idea is for each name to go into a player object, then in turn be stored in the players arraylist. If anyone can help, I would appreciate it.

我想要做的是编写一个应用程序，该应用程序接收未知数量的名称，然后将它们打印在新页面上。这应该是一个保龄球计分应用程序，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。

This is my controller code:

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);

}
}

This holds details for each player:

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;
}
}

This is the code for all Game properties, such as scoring etc.

这是所有游戏属性的代码，例如评分等。

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;
}   
}

The following are my JSP files, the output first:

以下是我的JSP文件，先输出：

<%@ 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>

This is the home page:

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>

回答by Ramesh Kotha

Change this <c:forEach var="player" items="players">to <c:forEach var="player" items="${players}">

将此更改<c:forEach var="player" items="players">为<c:forEach var="player" items="${players}">

As your referring "players" string. it is trying to find the property name in string.

作为您的参考“玩家”字符串。它试图在字符串中查找属性名称。