如何将th：对象值从html传递给控制器 [英] How to pass th:object values from html to controller

问题描述

如何将thymeleaf（th：object）值传递给控制器​​。

HTML：

 < form id =searchPersonFormaction =＃th：object =$ {person}method =post> 
< / form> 
  

SearchPersonController：

  @RequestMapping（value =/ modify / {pid}，method = RequestMethod.GET）
 public String modifyPersonData（Principal principal，@ModelAttribute（person）Person person，UserRoles userRoles，Model模型，@ PathVariable（pid）Long pid）{
 //修改数据
} 
  

我试图像 @ModelAttribute（person）Person person 那样通过，但这并不是从前一页中检索表单值。

任何人都可以帮忙解决这个问题。

谢谢。

解决方案

最好使用 th：action 作为表单属性而不是 action ，并指定绑定如下所示：

 < form th：action =@ {/ the-action-url}method =post 
 th：object =$ {myEntity}> 
 
< div class =modal-body> 
< div class =form-group> 
< label for =name>名称< / label> < input type =text
 class =form-controlid =nameth：field =* {name}> < /输入> 
< / div> 
 
< div class =form-group> 
< label for =description>描述< / label> < input type =text
 class =form-controlid =description
 th：field =* {description}> < /输入> 
< / div> 
< / div> 
< / form> 
  

我使用Spring控制器返回此表单，该控制器初始化模型属性（ myEntity 表单中的对象）。这是控制器类的相关部分：

  @ModelAttribute（value =myEntity）
 public实体newEntity （）
 {
 return new Entity（）; 
 
  

@ModelAttribute 注释可以确保Spring对每个请求都初始化模型对象。

在向控制器发送第一个请求时设置一个名为command的模型：

  @RequestMapping（value =/，method = RequestMethod.GET）
 public ModelAndView getRanks（Model model，HttpServletRequest request）
 {
 String view =the-view-name; 
返回新的ModelAndView（view，command，model）; 
} 
  

并且，要在提交表单后访问模型，请执行相对方法：

  @RequestMapping（value =/ the-action-url，method = RequestMethod.POST）
公共视图动作（模型模型，@ModelAttribute（myEntity）实体myEntity）
 {
 //保存实体或做任何你需要的事
 
返回新的RedirectView（ /用户/行列）; 
} 
  

这里，用 @ModelAttribute 会自动绑定到提交的对象。

How to pass thymeleaf(th:object) values to controller.

HTML:

<form id="searchPersonForm" action="#" th:object="${person}" method="post" >  
</form>

SearchPersonController:

@RequestMapping(value = "/modify/{pid}", method = RequestMethod.GET)
    public String modifyPersonData(Principal principal, @ModelAttribute("person") Person person, UserRoles userRoles, Model model, @PathVariable("pid") Long pid ) {
         //modify data
    }

I am trying to pass like @ModelAttribute("person") Person person but this is not retrieving form values from previous page.

Can anyone help on this.

Thanks.

解决方案

Preferably use th:action as a form attribute instead of action, and specify the binding like the following:

<form th:action="@{/the-action-url}" method="post"
    th:object="${myEntity}">

    <div class="modal-body">
        <div class="form-group">
            <label for="name">Name</label> <input type="text"
                class="form-control" id="name" th:field="*{name}"> </input>
        </div>

        <div class="form-group">
            <label for="description">Description</label> <input type="text"
                class="form-control" id="description"
                th:field="*{description}"> </input>
        </div>
    </div>
</form>

I back this form with a Spring controller that initializes the model attribute (myEntity object in the form). This is the relevant part of the controller class:

@ModelAttribute(value = "myEntity")
public Entity newEntity()
{
    return new Entity();
}

The @ModelAttribute annotation ensures that the model object is initialized by Spring for every request.

Set a model named "command" during the first get request to your controller:

@RequestMapping(value = "/", method = RequestMethod.GET)
public ModelAndView getRanks(Model model, HttpServletRequest request)
{
    String view = "the-view-name";
    return new ModelAndView(view, "command", model);
}

And, to access the model as it results after the form submission, implement the relative method:

@RequestMapping(value = "/the-action-url", method = RequestMethod.POST)
public View action(Model model, @ModelAttribute("myEntity") Entity myEntity)
{
    // save the entity or do whatever you need

    return new RedirectView("/user/ranks");
}

Here, the parameter annotated with @ModelAttribute is automatically bound to the submitted object.

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