Java 如何将 th:object 值从 html 传递到控制器
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How to pass th:object values from html to controller
提问by Java_User
How to pass thymeleaf(th:object) values to controller.
如何将 thymeleaf(th:object) 值传递给控制器。
HTML:
HTML：
<form id="searchPersonForm" action="#" th:object="${person}" method="post" >
</form>
SearchPersonController:
搜索人控制器：
@RequestMapping(value = "/modify/{pid}", method = RequestMethod.GET)
public String modifyPersonData(Principal principal, @ModelAttribute("person") Person person, UserRoles userRoles, Model model, @PathVariable("pid") Long pid ) {
//modify data
}
I am trying to pass like @ModelAttribute("person") Person personbut this is not retrieving form values from previous page.
我试图通过，@ModelAttribute("person") Person person但这不是从上一页检索表单值。
Can anyone help on this.
任何人都可以帮助解决这个问题。
Thanks.
谢谢。
回答by Evil Toad
Preferably use th:actionas a form attribute instead of action, and specify the binding like the following:
最好th:action用作表单属性而不是action，并指定如下绑定：
<form th:action="@{/the-action-url}" method="post"
th:object="${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 (myEntityobject in the form). This is the relevant part of the controller class:
我使用初始化模型属性（myEntity表单中的对象）的 Spring 控制器支持此表单。这是控制器类的相关部分：
@ModelAttribute(value = "myEntity")
public Entity newEntity()
{
return new Entity();
}
The @ModelAttributeannotation ensures that the model object is initialized by Spring for every request.
该@ModelAttribute注释确保模型对象由Spring为每个请求初始化。
Set a model named "command" during the first get request to your controller:
在对控制器的第一个 get 请求期间设置一个名为“command”的模型：
@RequestMapping(value = "/", method = RequestMethod.GET)
public ModelAndView getRanks(Model model, HttpServletRequest request)
{
String view = "the-view-name";
return new ModelAndView(view, "command", model);
}
And, to access the model as it results after the form submission, implement the relative method:
并且，要在表单提交后访问模型，请实现相关方法：
@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 @ModelAttributeis automatically bound to the submitted object.
在这里，注解的参数@ModelAttribute会自动绑定到提交的对象上。
