Question

在提交下面的表单是我的代码

后，我没有在spring控制器中获取表单数据

@RequestMapping(value = "category/addCategory.htm" , method = RequestMethod.GET)
public String add(Model model) {
    if (log.isDebugEnabled()){
        log.debug("Invoking listCategory");
    }
    model.addAttribute("categoryView", new CategoryView());
    return "editCategory";
}

@RequestMapping(value = "category/saveCategory.htm", method = RequestMethod.POST)
public String saveCategory(CategoryView categoryView, Model model,  BindingResult result) {

    Category category = prepareCategoryFromView(categoryView);

    categoryService.save(category);
    categoryView.setCategoryId(category.getCategoryId());
    model.addAttribute("categoryView",categoryView);
    return "editCategory";
}

prepareCategoryFromView是一个方法，它在Category it的hibernate实体上设置实际值，在categoryView

下面

public class CategoryView {
private long categoryId;
private String image = "";
private int parentId;
private boolean top;
private int column = 1;
private int sortOrder = 1;
private boolean status;
private String description;
private String name;
.
.
other variable and setter and getters
}

，表格是

<sf:form  method="post" enctype="multipart/form-data" id="form-category" cssClass="form-horizontal" modelAttribute="categoryView">
<sf:label path="name" cssClass="col-sm-2 control-label">Category Name</sf:label>
<sf:input path="name" id="name" name="name" cssClass="form-control" placeholder="Category Name" />
<sf:hidden path="categoryId" id="categoryId" name="categoryId" />
<sf:hidden path="languageId" id="languageId" name="languageId" />
<sf:label path="description" cssClass="col-sm-2 control-label">Category Name</sf:label>
<sf:textarea path="description" cssClass="form-control" placeholder="Description" id="description"/>
.
.
.
</sf:form>

每次我获取名称和描述时都是上述形式（我认为它创建了一个没有给定值的新视图对象）

请告诉我，我错了

Answer 1

从enctype="multipart/form-data"标记中删除form，然后重试（使用正确顺序的方法参数）。由于您的属性名称与类名匹配，因此不严格要求@ModelAttribute。

Answer 2

我认为在CategoryView对象上缺少@ModelAttribute注释。因为根据你的表单代码，它是模型属性，它将数据绑定到控制器中的bean。

使用下面的方法参数附加它，然后您可以检查数据是否绑定到它。

@RequestMapping(value = "category/saveCategory.htm", method = RequestMethod.POST)
public String saveCategory(@ModelAttribute("categoryView") CategoryView categoryView, Model model,  BindingResult result) {

    Category category = prepareCategoryFromView(categoryView);

    categoryService.save(category);
    categoryView.setCategoryId(category.getCategoryId());
    model.addAttribute("categoryView",categoryView);
    return "editCategory";
}

表单数据不与Spring Controller Annotation绑定，在提交后获取新对象

2 个答案: