java - Spring MVC + Thymeleaf 将单个对象发送到 Controller

Question

我有点震惊，因为我找不到如何执行此操作的示例。每次我用谷歌搜索时，我都会得到有关如何发布对象集合或其他不相关内容的信息。 thymeleaf 文档(我能找到的)似乎也没有解释太多，就像有很多假设的知识一样。

回到我的问题，我只想从表单中发布一个对象(bean)。 我希望我的 Controller 映射方法绑定(bind)到这个“pojo”bean，而不是绑定(bind)到一堆字符串/整数。

我发现唯一接近的是 StackOverflow 上的东西，其中一半代码在问题中，另一半在答案中，并且总是有一些人的评论说它不起作用对于他们来说。

有人可以用一个简单的、无聊的例子来缓解一下吗？

Answer 1

可以找到以下代码片段，可能对您有帮助。

Controller GET/POST 映射:

@RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registartionPage(Model model) {

Registration registration = new Registration();

model.addAttribute("registration", registration);

return "registarion/registarion";
}

@RequestMapping(value = "/user/new-user-registrn", method = RequestMethod.POST)
public String newUserRegistrn(Model model, @ModelAttribute("registration") 
Registration registration, RedirectAttributes redirectAttributes) {

try {

    StarUser user = starSecurityService.findSysUserName(registration.getUserName());
    if (user != null) {
        throw new Exception("User Already Exist. Please try with different User Name");
    }

    user = (StarUser) starUtilService.save(setStarUser(registration));
    model.addAttribute("registration", registration);
    if (user != null) {

        redirectAttributes.addAttribute("starMessage",
            "Your Account is successfully created !! Login to Access the Application");

        return "redirect:/";
    }

} catch (Exception e) {

    model.addAttribute(STAR_MESSAGE, e.getMessage());
}

return "registarion/registarion";
}

thymeleaf 含量:

<form class="form-horizontal col-sm-12" method="POST" th:action="@{/user/new-user-registrn}" th:object="${registration}">

<div class="row">

    <div class="form-group col-md-12">
        <div class="star-reg-header">New User Registration</div>
    </div>

    <div class="star-reg-body">

        <div class="form-group col-sm-4">
            <label class="required">First Name: </label>
            <input type="text" class="form-control required" th:field="*{firstName}" required="required" />
        </div>

        <div class="form-group col-sm-4">
            <label class="required">Last Name: </label>
            <input type="text" class="form-control" th:field="*{lastName}" required="required" />
        </div>

        <div class="form-group col-sm-4">
            <label class="required">User Name: </label>
            <input type="text" class="form-control" th:field="*{userName}" required="required" />
        </div>

        <div class="form-group col-sm-4">
            <label class="required">Password: </label>
            <input type="password" class="form-control" th:field="*{password}" required="required" />
        </div>

        <div class="form-group col-sm-4">
            <label class="required">Email: </label>
            <input type="text" class="form-control" th:field="*{email}" required="required" />
        </div>

    </div>

</div>
<div class="form-group col-md-12">
    <label class="col-sm-2"></label>
    <div class="col-sm-10">
        <button type="submit" class="btn btn-info">Submit</button>
    </div>
</div>

Java Bean 类

public class Registration {

 protected String firstName;

 protected String lastName;

 protected String userName;

 protected String password;

 protected String email;

 //Setter and Getter

}