如何在Spring MVC中将复选框值传递给控制器 [英] How to pass checkbox values to the controller in Spring MVC

问题描述

我有一个包含功能列表的jsp页面.在控制器中，我从数据库中获取此列表，并将其传递给jsp.

I have a jsp page with list of functions. Here in controller I get this list from database and pass it to jsp.

@RequestMapping(value = "/functionlist", method = RequestMethod.GET)
    public ModelAndView functionList(Model model) throws Exception {
        ModelAndView mv = new ModelAndView("functionList");
        mv.addObject("functionList", getFunctionsFromDB());
        return mv;
    }

在我的jsp页面中，我使用此功能列表创建表

In my jsp page I create table using this list of functions

<table id="table">
    <thead>
    <tr>
        <th></th>
        <th>Name</th>
        <th>Action</th>
    </tr>
    </thead>
    <tbody>
    <c:choose>
        <c:when test="${not empty functionList}">
            <c:forEach var="function" items="${functionList}">
                <tr>
                    <td><input name="id" value="${function.id}" hidden></td>
                    <td>${function.name}</td>
                    <td>
                        <input type="checkbox" id="${function.id}" value="${function.action}"></td>
                </tr>
            </c:forEach>
        </c:when>
    </c:choose>
    </tbody>
</table>
<button type="submit" name="save">Save</button>

我还将功能ID赋予复选框ID.

I also give function id to checkbox id.

我的Function实体如下

My Function entity is the following

public class Function {

    private Integer id;
    private String name;
    private Boolean action;
...
}

我想按保存"按钮并进入控制器"/functionlist/save"我的复选框值列表.

I want to press button Save and get in controller "/functionlist/save" my list of checkbox values.

推荐答案

尝试将这样的form添加到您的jsp页面

Try to add form like this to your jsp page

  <form:form id="yourForm" action="/functionlist/save" method="POST" modelAttribute="functionList">

        <c:forEach items="${functionList}" varStatus="status" var="function">

            <tr>
                <td>${function.name}</td>
                <td>
                    <form:checkbox path="functionList[${status.index}].action"/>
                </td>
            </tr>
        </c:forEach>

        <input type="submit" value="submit" />
    </form:form>

在Controller中，您应该有这样的方法

and in Controller you should have a method like this

  @RequestMapping(value = { "/functionlist/save" }, method = RequestMethod.POST)
    public String savePerson(@ModelAttribute("functionList")List<Function> functionList) {
        // process your list
    }

如果这不起作用，则可以尝试包装列表.

If this does not work, you can try to wrap you list.

public class FunctionListWrapper {
    private List<Function> functionList;

    public FunctionListWrapper() {
        this.functionList = new ArrayList<Function>();
    }

    public List<Function> getFunctionList() {
        return functionList;
    }

    public void setFunctionList(List<Function> functionList) {
        this.functionList = functionList;
    }

    public void add(Function function) {
        this.functionList.add(function);
    }
}

在控制器中，而不是通过列表，而是通过包装器

in controller instead of passing list, pass wrapper

  FunctionListWrapper functionListWrapper=new FunctionListWrapper();
        functionListWrapper.setFunctionList(userService.getFunctionList());
        mv.addObject("functionListWrapper", functionListWrapper);

有关更多详细信息，请查看以下问题:问题2

For more details please take a look at this questions: question 1 and question 2

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