java - 在jsp页面中获取LinkedHashMap中存储的元素

Question

如何在Spring Controller 中的ModelAndView对象中添加的jsp页面中获取LinkedHashMap，请看下面的代码:

用户DTO:

public class UserDTO{

    public byte[] data;
    public String user;
    public Long id;

    public byte[] getData() {
        return data;
    }
    public void setData(byte[] data) {
        this.data = data;
    }
    public String getUser() {
        return user;
    }
    public void setUser(String user) {
        this.user = user;
    }
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
}

Controller :

@RequestMapping(value = "/showData", method = RequestMethod.GET)
    public String showRequest(final HttpServletRequest request,
             HttpServletResponse response, ModelMap model,
             @RequestParam("ID") String Id) {
         MyDTO myRequestDTO = new MyDTO();
        String viewName = "myData";
        final ModelAndView mav = new ModelAndView();

    LinkedHashMap<Long,UserDTO> myList = myRequestsDTO.getAllRecords();
        /*  UserDTO userDoc = null;
            Long userDocKey;
            if(!myList.isEmpty()){
            for (Map.Entry<Long,UserDTO> doc : myList.entrySet()) {     
                  userDoc = doc.getValue();
                  userDocKey = doc.getKey();
                System.out.println("User  = " + userDoc.getUser() + " User Name = " + userDoc.getData());

            } } */
mav.addObject("myList", myList);//want to get this myList in jsp page and get the details from that.
return viewName;
}

请建议如何获取存储在 ModelAndView 对象中的 LinkedHashMap 并从该映射中获取“userDoc.getUser()”、“userDoc.getId()”和“userDoc.getData()”，如我在上面的 Controller 代码中所示。我知道这可以使用 JSTL 来实现，但由于我是新手，请让我知道对我很有帮助的解决方案。

Answer 1

您可以使用 foreach 通过 JSTL 迭代您的 map 。

<c:forEach var="entry" items="${myList}">
  Key  : <c:out value="${entry.key}"/>

  User : <c:out value="${entry.value.user}"/>
  Id   : <c:out value="${entry.value.id}"/>
  Data : <c:out value="${entry.value.data}"/>

</c:forEach>