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我们有一个使用 springboot(ver 1.5) 和 maven 的基本 java web 应用程序。我们使用百里香和蒲公英作为表示层。添加了蒲公英，因此我们可以使用数据表。数据表工作正常，可排序、可搜索等。唯一的问题是导出到 excel 功能不起作用（单击 xslx 链接时为空指针）。我已按照此处找到的教程进行操作。

https://dandelion.github.io/components/datatables/1.1.0/docs/html/#6-4-activating-export

示例代码和我的实现的一个区别是我使用的是 springboot 并且没有 web.xml 文件。我认为我的问题可能出在设置过滤器的配置文件中。任何人都认为这有任何问题。另外，如果在 springboot 应用程序中使用蒲公英 excel 导出，请分享您的配置文件。谢谢！

蒲公英配置.java 文件：

package com.gatewaysvc.configuration;

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.github.dandelion.core.web.DandelionFilter;
import com.github.dandelion.core.web.DandelionServlet;
import com.github.dandelion.datatables.core.web.filter.DatatablesFilter;
import com.github.dandelion.datatables.thymeleaf.dialect.DataTablesDialect;
import com.github.dandelion.thymeleaf.dialect.DandelionDialect;

@Configuration
public class DandelionConfiguration {

    @Bean
    public DandelionDialect dandelionDialect()
    {
            return new DandelionDialect();
    }

    @Bean
    public DataTablesDialect dataTablesDialect()
    {
            return new DataTablesDialect();
    }

    // Dandelion filter definition and mapping
    @Bean
    public FilterRegistrationBean filterRegistrationBean()
    {
            FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
            filterRegistrationBean.setFilter(new DandelionFilter());
            filterRegistrationBean.addUrlPatterns("/*");
            return filterRegistrationBean;
    }   

    //Dandelion servlet definition and mapping
    @Bean
    public ServletRegistrationBean servletRegistrationBean()
    {
            ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
            servletRegistrationBean.setServlet(new DandelionServlet());
            servletRegistrationBean.addUrlMappings("/dandelion-assets/*");
            servletRegistrationBean.setName("dandelionServlet");
            return servletRegistrationBean;
    }

    @Bean
    public DatatablesFilter dataTablesFilter () {   
        return new DatatablesFilter();
    }   

}

html页面片段：

    <div class="container" id="dataTables">
        <div th:if="${not #lists.isEmpty(deviceActivityFormBean.inbound) and #lists.isEmpty(deviceActivityFormBean.outbound) and #lists.isEmpty(deviceActivityFormBean.both)}" class="panel panel-primary">     
            <div class="panel-body">        
                <table class="table display table-striped table-hover cell-border" dt:table="true" id="deviceInboundTable" dt:export="xlsx">
                    <thead>
                        <tr>
                            <th>Device Id 000</th>
                            <th>Create TMSTP</th>
                            <th>Message</th>
                            <th>IP Address</th>
                            <th>HTTP Resp Code</th>
                            <th>Server</th>
                            <th>Duration (ms)</th>
                            <th>Protocol</th>
                        </tr>
                    </thead>
                    <tbody>             
                        <tr th:each="dvc : ${deviceActivityFormBean.inbound}">
                            <td dt:xlsx="${dvc.deviceId}" th:text="${dvc.deviceId}"></td>
                            <td th:text="${dvc.createTime}"></td>
                            <td id ="mssgInbound" th:text="${dvc.mssg}"></td>
                            <td th:text="${dvc.ipMssg}"></td>
                            <td th:text="${dvc.httpResp}"></td>
                            <td th:text="${dvc.server}"></td>
                            <td th:text="${dvc.duration}"></td>
                            <td th:text="${dvc.protocol}"></td>
                        </tr>
                    </tbody>
                </table>
            </div>
            <div>
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