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Question

我有一个控制器用于显示项目列表，但我找不到为什么@ModelAttribute方法没有被调用。

这是我的控制者：

@Controller(value = "projectListController")
@RequestMapping(value = "VIEW")
public class ProjectListController {

@Autowired
@Qualifier("projectService")
private ProjectService projectService;

@RenderMapping
public String showProjects() {

    return "projectList";
}

@ModelAttribute("projectListCount")
public Long getProjectListCount() {

    return projectService.getProjectListCount();
}

@ModelAttribute("projectFilter")
public ProjectFilter getProjectFilter(
        @RequestParam(value = "cur", required = false) String curString,
        @RequestParam(value = "delta", required = false) String deltaString,
        @RequestParam(value = "orderByCol", required = false) String orderByCol,
        @RequestParam(value = "orderByType", required = false) String orderByType) {

    return new ProjectFilter(curString, deltaString, orderByCol, orderByType);
}

@ModelAttribute("projectList")
public List<TPrProgetti> getProjectList(
        @ModelAttribute("projectFilter") ProjectFilter projectFilter) {

    return projectService.getProgettiList(projectFilter.getCur(), projectFilter.getDelta(),
            projectFilter.getOrderByCol(), projectFilter.isAsc());
}
}

调用该方法的顺序是：

模型projectListCount
模型projectList
渲染projectList

我不明白为什么Model projectFilter没有被调用，被用作render方法中的参数。我看到Spring更喜欢调用ProjectFilter的构造函数并通过setter设置其字段。如何完成这种映射是另一回事......

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为了完成并回答评论，这个项目是一个部署在Liferay中的portlet，它使用Spring。

jsp是这样的：

<liferay-ui:search-container emptyResultsMessage="No project found"
    orderByCol="${projectFilter.orderByCol}" orderByType="${projectFilter.orderByType}"
    delta="${projectFilter.delta}">
    <liferay-ui:search-container-results total="${progettiCount}"
        results="${projectList}">
    </liferay-ui:search-container-results>

    <liferay-ui:search-container-row
        className="it.eng.liferay.portlet.domain.TPrProgetti" keyProperty="id" modelVar="project">
        <liferay-ui:search-container-column-text name="Codice" property="codProg"  orderable="<%= true %>" orderableProperty="codProg"/>
        <liferay-ui:search-container-column-text name="Descrizione"  property="descrizione" orderable="<%= true %>" orderableProperty="descrizione"/>
        </liferay-ui:search-container-row>
    <liferay-ui:search-iterator />
</liferay-ui:search-container>

Answer 1

我刚刚使用了一个包含每个ModelAttribute的ModelAttribute方法，如下所示：

@ModelAttribute
public void populateModel(Model model,
        @RequestParam(value = "cur", required = false) String curString,
        @RequestParam(value = "delta", required = false) String deltaString,
        @RequestParam(value = "orderByCol", required = false) String orderByCol,
        @RequestParam(value = "orderByType", required = false) String orderByType) {

    model.addAttribute("progettiCount", projectService.getProgettiCount());
    model.addAttribute("projectFilter", projectFilter);
    model.addAttribute("projectList", projectService.getProgettiList(projectFilter.getCur(), projectFilter.getDelta(),
                    projectFilter.getOrderByCol(), projectFilter.isAsc()));
}

我不太喜欢它，但它确实有用。

我还尝试使用最新版本的4.0版4.0，但问题没有改变。

Spring：不会调用ModelAttribute

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1 个答案: