Question

我目前正在尝试为企业项目扩展Spring Batch Admin。我已经将基本的SBA设置集成到我的项目中，但我希望添加一些新功能。我想添加的功能是我在网上here找到的功能。到目前为止，我遇到的一件事是，当尝试添加新的Controller和ftl模板时，模型将控制器/模型绑定到视图时出现问题。

我希望您可以帮助我的是扩展SBA需要哪些其他配置（相对一步一步）。我不是Spring或Spring Batch的新手，但我是Freemarker的新手。关于Freemarker在传递给模型时如何从我的控制器中获取属性似乎存在一些混淆。

到目前为止，我有我想要使用的ftl模板（从SBA的标准模板中获取）。这基本上是spring-batch-admin-manager.jar中找到的一个默认ftl文件的修改版本：

<#import "/spring.ftl" as spring />
<@spring.bind "model"/>
<div id="job-triggers">

<h2>${MODEL_ATTRIBUTE_SEARCH_RESULT_MESSAGE}</h2>

<p/>

<#if fireTimes??>
    <table title="Future Job Executions"
           class="bordered-table">
        <tr>
            <th>Job Name</th>
            <th>Date</th>
        </tr>
        <#list fireTimes as execution>
            <#if execution_index % 2 == 0>
                <#assign rowClass="name-sublevel1-even" />
            <#else>
                <#assign rowClass="name-sublevel1-odd" />
            </#if>
            <tr class="${rowClass}">
                <#assign execution_url><@spring.url relativeUrl="${servletPath}/jobs/${execution.jobName?c}"/></#assign>
                <td>${execution.jobName}</td>
                <td>${execution.date}</td>
            </tr>
        </#list>
    </table>
    <#if startJobExecution??>
        <ul class="controlLinks">
            <#assign executions_url><@spring.url relativeUrl="${servletPath}/jobs/executions"/></#assign>
            <li>Rows: ${startJobExecution}-${endJobExecution} of ${totalJobExecutions}</li>
            <#if nextJobExecution??><li><a href="${executions_url}?startJobExecution=${nextJobExecution?c}&pageSize=${pageSize!30}">Next</a></li></#if>
            <#if previousJobExecution??><li><a href="${executions_url}?startJobExecution=${previousJobExecution?c}&pageSize=${pageSize!30}">Previous</a></li></#if>
            <!-- TODO: enable pageSize editing -->
            <li>Page Size: ${pageSize!30}</li>
        </ul>
    </#if>
</#if>

然后我有一个Controller，它有一个ModelMap参数给GET请求，我把不同的属性放到了model.addAttribute（“someName”，someObject）：

@RequestMapping(value = "/", method = RequestMethod.GET)
public String index(@ModelAttribute("model") ModelMap model) throws SchedulerException, ParseException {

    Scheduler scheduler = appCtx.getBean(SchedulerFactoryBean.class).getObject();
    Calendar cal = Calendar.getInstance();
    Date from = cal.getTime();
    cal.add(Calendar.DATE, 1);
    Date to = cal.getTime();

    List<FireTime> fireTimes = getFiretimesForTriggers(scheduler, from, to);
    Collections.sort(fireTimes);
    model.addAttribute("fireTimes", fireTimes);

    if(fireTimes.isEmpty()) {
        model.addAttribute(MODEL_ATTRIBUTE_SEARCH_RESULT_MESSAGE,"No firetimes found between " + DATE_FORMAT.format(from) + " and " + DATE_FORMAT.format(to));
    } else {
        model.addAttribute(MODEL_ATTRIBUTE_SEARCH_RESULT_MESSAGE, fireTimes.size() + " firetimes found between" + DATE_FORMAT.format(from) + " and " + DATE_FORMAT.format(to));
    }
    return INDEX_VIEW;
}

除了这几个文件之外，除了servlet-config.xml中新视图的定义之外，我没有任何其他配置：

<import resource="classpath:/applicationContext.xml"/>
<import resource="classpath*:/META-INF/spring/batch/servlet/resources/*.xml" />
<import resource="classpath*:/META-INF/spring/batch/servlet/manager/*.xml" />

<context:component-scan base-package="com.basepackage.where.my.controller.components.are" />

<bean name="firetimesView" parent="standard">
    <property name="attributes">
        <props merge="true">
            <prop key="body">/firetimesView.ftl</prop>
            <prop key="titleCode">fire.times.title</prop>
            <prop key="titleText">Fire Times</prop>
        </props>
    </property>
</bean>

我遇到的问题是Freemarker提供错误，引用的模型组件是无效引用：

freemarker.core.InvalidReferenceException: Expression MODEL_ATTRIBUTE_SEARCH_RESULT_MESSAGE is undefined on line 5, column 11 in firetimesView.ftl.
freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
freemarker.core.Expression.getStringValue(Expression.java:118)
freemarker.core.Expression.getStringValue(Expression.java:93)
freemarker.core.DollarVariable.accept(DollarVariable.java:76)
freemarker.core.Environment.visit(Environment.java:209)
freemarker.core.MixedContent.accept(MixedContent.java:92)
freemarker.core.Environment.visit(Environment.java:209)
freemarker.core.Environment.include(Environment.java:1482)
freemarker.core.Include.accept(Include.java:169)
freemarker.core.Environment.visit(Environment.java:209)
freemarker.core.MixedContent.accept(MixedContent.java:92)
freemarker.core.Environment.visit(Environment.java:209)
freemarker.core.Environment.process(Environment.java:189)
freemarker.template.Template.process(Template.java:237)
org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:366)
org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:283)
org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:233)
org.springframework.batch.admin.web.freemarker.AjaxFreeMarkerView.renderMergedTemplateModel(AjaxFreeMarkerView.java:107)
org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:73)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

我还需要setter注入和从视图中访问变量所需的getter / setter。关于为什么Freemarker无法获取我添加到地图中的属性的任何想法？任何帮助将不胜感激！

Answer 1

由于您使用的是let animator = UIViewPropertyAnimator(duration: 2.0, curve: .easeOut){ self.view.alpha = 0.0 } // Call this to start animation. animator.startAnimation() // Call this to stop animation. animator.stopAnimation(true)，因此您可以使用ModelMap代替put。最后，您的代码应如下所示：

addAttribute

如果这不起作用，只需尝试将其设为if(fireTimes.isEmpty()) { model.put(MODEL_ATTRIBUTE_SEARCH_RESULT_MESSAGE,"No firetimes found between " + DATE_FORMAT.format(from) + " and " + DATE_FORMAT.format(to)); } else { model.put(MODEL_ATTRIBUTE_SEARCH_RESULT_MESSAGE, fireTimes.size() + " firetimes found between" + DATE_FORMAT.format(from) + " and " + DATE_FORMAT.format(to)); }而不是Model。

Freemarker不挑选模型属性的Spring Batch Admin自定义问题

1 个答案: