java - 同时传递HashMap和ArrayList值以查看文件

我正在使用Spring MVC，并且试图将HashMap和ArrayList值都传递给我的视图文件。但是我找不到实现这一目标的方法。

请你帮助我好吗？

我的控制器方法

@RequestMapping(value="/do_register", method= RequestMethod.GET)
public ModelAndView RegistrationForm(@ModelAttribute Subscriber subscriber, BindingResult result)
{

  HashMap<Integer, String> interest = new HashMap<Integer, String>();
    interest.put(1,"Java");
    interest.put(2,"PHP");
    interest.put(3, "Both");

  List<City> myCities = subService.getCity();

 // I want to pass both "myCities" and "interest" to my view File
 return new ModelAndView("regForm", "records", " ");

}

形成

<c:url var="action" value="/register" ></c:url>
<form:form action="${action}" modelAttribute="subscriber" method="POST" >

    <div>
    <label>City</label>
    <form:select path="city">
    <c:forEach items="${records}" var="city">
            <option value="${city.cityId}">${city.cityName}</option>
    </c:forEach>
    </form:select>
    </div>

    <div>
    <label>Interests</label>
    <form:checkboxes path="interest" items="${records.interests}"/>
    </div>

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

最佳答案

ModelAndView包含Model，它是Map的一种。它可以包含所需数量的对象。只需像下面那样修改您的代码：

@RequestMapping(value="/do_register", method= RequestMethod.GET)
public ModelAndView RegistrationForm(@ModelAttribute Subscriber subscriber, BindingResult result)
{

    ...
    // I want to pass both "myCities" and "interest" to my view File
    ModelAndView mav =  ModelAndView("regForm");
    mav.addAttribute("interests", interest);
    mav.addAttribute("records", myCities);
    return mav;
}

然后使用${records}和${interests}在JSP中找到对象

关于java - 同时传递HashMap和ArrayList值以查看文件，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/25697558/