Spring MVC thymeleaf 无法解析对象属性和字段答案

【问题标题】：Spring MVC thymeleaf cannot resolve object attribute and fieldsSpring MVC thymeleaf 无法解析对象属性和字段
【发布时间】：2016-10-31 03:09:25
【问题描述】：

我刚刚开始发现 Spring MVC，并被这个简单的项目所困扰。在模板 index1.html 中有一个播放器对象 (th:object="${player}") 和字段值 (th:field="{playerId}"), (th:field="{ playerName}") 无法解析。模板 index2.html 中的情况与 (${player.playerId}) 和 (${player.playerName}) 相同。您能建议这可能是什么原因吗？

PlayerController.java

@Controller
public class PlayerController {

Logger log = LoggerFactory.getLogger(this.getClass());

@RequestMapping(value = "/create", method = RequestMethod.GET)
public String showForm(Model model) {
    model.addAttribute("player", new Player());
    return "create";
}

@RequestMapping(value = "/create", method = RequestMethod.POST)
public String processForm(@ModelAttribute Player player, Model model) {
    model.addAttribute("player", player);

    String info = String.format("Player Submission: playerId = %d, playerName = %s",
            player.getPlayerId(), player.getPlayerName());
    log.info(info);
    return "view";
}

}

模型

public class Player{

private int playerId;
private String playerName;

.... getters and setters
}

观点

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">

<head>
    <meta http-equiv="Content-Type" content="text/html" charset="UTF-8" >
    <title>Form Submission</title>

</head>
<body>
    <h1>Player</h1>
    <form action = "#" th:action="@{/create}" th:object="${player}" method="post">
        <p>Id: <input type="text" th:field="*{playerId}" /></p>
        <p>Name: <input type="text" th:field="*{playerName}" /></p>
        <p><input type="submit" value="Add" /></p>
    </form>

</body>
</html>

<!DOCTYPE html>
<html lang="en"  xmlns:th="http://www.thymeleaf.org">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>Player info</title>
</head>
<body>

<p th:text="'ID: ' + ${player.playerId}" />
<p th:text="'Name: ' + ${player.playerName}" />

</body>
</html>

项目结构 Click to see the Project Structure

【问题讨论】：

您的 html 文件在哪里？应该是 ito /resources/templates
@cralfaro 是的，html 文件位于 /resources/templates 中。我附上了上面的项目结构截图。

标签： spring spring-mvc thymeleaf

【解决方案1】：

尝试使用return "redirect: 将http 请求传输到您的查看页面。

 @RequestMapping(value = "/create", method = RequestMethod.POST)
    public String processForm(@ModelAttribute Player player, Model model) {
        model.addAttribute("player", player);

        String info = String.format("Player Submission: playerId = %d, playerName = %s",
                player.getPlayerId(), player.getPlayerName());
        log.info(info);
        return "redirect:view";
       // OR return "redirect:/view";
    }

我推荐的另一种方法是：

@RequestMapping(value = "/create", method = RequestMethod.POST)
public String processForm(@ModelAttribute("player")) {

    log.info(info);
    return "redirect:/view";
}

【讨论】：