带有Double Select的Struts2 jQuery插件问题

Question

我在尝试使用Struts2 jQuery插件中的Doubleselect元素时遇到了一个小问题（我希望），并且在互联网上搜索后一无所获，因此我来这里寻求帮助。
我有一个带有两个struts2 jQuery插件选择的jsp，以根据从第一个选择的项目（ Fabricante ）中选择的项目来加载第二个选择（ Modelo ）。 加载jsp时，将加载第一个选择。 但是，当我从第一个选择中选择一个项目时，该选择的项目的值未到达操作（值为null），因此无法从数据库中查询第二个选择的值； 因此，不会加载第二选择。

我遵循了来自struts2-jquery-showcase的示例 。

有关我的应用的一些信息：

• struts2的2.3
• 瓷砖
• Spring 3.1（我有struts2-spring集成）

遵循某些文件中的代码段

磁贴布局的JSP代码

<%@ page contentType="text/html;charset=UTF-8" language="java"%>
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles"%>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>
<tiles:importAttribute/>

<html xmlns="http://www.w3.org/1999/xhtml">
    <head>

        <script type="text/javascript">
            var GB_ROOT_DIR = "res/greybox/";
        </script>
        <script type="text/javascript" src="res/greybox/AJS.js"></script>
        <script type="text/javascript" src="res/greybox/AJS_fx.js"></script>
        <script type="text/javascript" src="res/greybox/gb_scripts.js"></script>
<...>

        <sj:head jqueryui="true" />

    </head>
    <body leftmargin="0" topmargin="0" marginheight="0" marginwidth="0">

             <tiles:insertAttribute name="header" />
             <tiles:insertAttribute name="menu" />

<...>
             <tiles:insertAttribute name="content" />

    </body>
</html>

JSP代码

<%@ page contentType="text/html;charset=UTF-8" language="java"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="display" uri="http://displaytag.sf.net"%>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>
<...>
<s:form action="nuevaReparacion2" validate="true" onsubmit="return checkSubmit();" name="formulario" method="post">
<...>
        <table cellpadding="0" cellspacing="0" width="900">
          <tr>
            <td height="2"> Fabricante:
            <s:url id="remoteurl" action="nuevaReparacionCargaModelo"/>
            <sj:select
                    href="%{remoteurl}"
                    id="selectFab"
                    onChangeTopics="reloadModelos"
                    name="idFabricante"
                    list="listFabricantes"
                    listKey="id"
                    listValue="nombre"
                    emptyOption="false"
                    headerKey="-1"
                    headerValue="Seleccione un fabricante"
                    indicator="indicator"
                />
                <img id="indicator"
                    src="res/images/ajax-loader.gif"
                    alt="cargando..."
                    style="display:none"
                />

            </td>
            <td height="2">Modelo:
            <sj:select
                    href="%{remoteurl}"
                    id="selectMod"
                    formIds="formulario"
                    reloadTopics="reloadModelos"
                    name="idModelo"
                    list="listModelos"
                    listKey="id"
                    listValue="nombre"
                    emptyOption="false"
                    headerKey="-1"
                    headerValue="Seleccione un modelo"
                    indicator="indicator2"
                />
                <img id="indicator2"
                    src="res/images/ajax-loader.gif"
                    alt="cargando..."
                    style="display:none"
                />
            </td>

          </tr>
        </table>
<...>

web.xml中

<...>
 <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/classes/spring-context.xml</param-value>
  </context-param>

  <context-param>
    <param-name>org.apache.tiles.impl.BasicTilesContainer.DEFINITIONS_CONFIG</param-name>
    <param-value>/WEB-INF/classes/tiles.xml</param-value>
  </context-param>

  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>

   <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/struts/*</url-pattern>
    </filter-mapping>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>*.action</url-pattern>
  </filter-mapping>


  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>

  <listener>
    <listener-class>org.apache.struts2.tiles.StrutsTilesListener</listener-class>
  </listener>
<...>

在struts.xml

<...>
      <interceptor-stack name="authenticationMinimalStack">
        <interceptor-ref name="exception" />
        <interceptor-ref name="servletConfig" />
        <interceptor-ref name="securityInterceptor" />
        <interceptor-ref name="prepare" />
        <interceptor-ref name="checkbox" />
        <interceptor-ref name="multiselect" />
        <interceptor-ref name="chain" />
        <interceptor-ref name="fileUpload">
            <!--  <param name="maximumSize">50000000</param> -->
            <param name="maximumSize">80000000</param>
        </interceptor-ref>
        <interceptor-ref name="modelDriven"/>
        <interceptor-ref name="staticParams" />
        <interceptor-ref name="params"/>
        <interceptor-ref name="workflow" />
      </interceptor-stack>
<...>
<...>
   <action name="nuevaReparacionCargaModelo" method="cargaModeloFabricante" class="nuevaReparacionAction">
      <interceptor-ref name="authenticationMinimalStack" />
      <result name="pajax" type="json"></result>
    </action>
<...>

动作类代码

public class NuevaReparacionAction extends AbstractAction<NuevaReparacionForm> {
<...>
public String init() throws Exception {

        if (model.getListFabricantes() == null) {
            List<Fabricante> listFabricantes = referenceDataService.getAllFabricantes();
            model.setListFabricantes(listFabricantes);

        }
<...>
}
<...>
    public String cargaModeloFabricante()  throws Exception {

        if(StringUtils.isNotEmpty(idFabricante)){
            List<Modelo> listModelos = referenceDataService.getAllModelosPorFab(idFabricante);
            model.setListModelos(listModelos);
        }

        String res = "pajax";
        return res;
    }
<...>
}

表格类代码

public class NuevaReparacionForm extends AbstractActionForm {
<...>
private List<Fabricante> listFabricantes;
    private String idFabricante;
    private List<Modelo> listModelos;
    private String idModelo;
<...>
public List<Fabricante> getListFabricantes() {
        return listFabricantes;
    }

    public void setListFabricantes(List<Fabricante> listFabricantes) {
        this.listFabricantes = listFabricantes;
    }

    public String getIdFabricante() {
        return idFabricante;
    }

    public void setIdFabricante(String idFabricante) {
        this.idFabricante = idFabricante;
    }
    public List<Modelo> getListModelos() {
        return listModelos;
    }

    public void setListModelos(List<Modelo> listModelos) {
        this.listModelos = listModelos;
    }

    public String getIdModelo() {
        return idModelo;
    }

    public void setIdModelo(String idModelo) {
        this.idModelo = idModelo;
    }

<...>

法式豆

public class Fabricante extends AbstractObject<Long> {

    private static final long serialVersionUID = -3767216824782509270L;

    private boolean indRepara;


    public boolean isIndRepara() {
        return indRepara;
    }


    public void setIndRepara(boolean indRepara) {
        this.indRepara = indRepara;
    }




    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (!obj.getClass().equals(getClass())) {
            return false;
        }

        Fabricante castedObj = (Fabricante) obj;
        return ObjectUtils.equals(getId(), castedObj.getId());
    }


    @Override
    public String toString() {
        return new ToStringBuilder(this)
                   .append("id", getId())
                   .append("nombre", getNombre())
                   .toString();
    }
}

Modelo豆

public class Modelo extends AbstractObject<Long> {

    private static final long serialVersionUID = -5167217040308921281L;

    private Fabricante fabricante;


    public Fabricante getFabricante() {
        return fabricante;
    }

    public void setFabricante(Fabricante fabricante) {
        this.fabricante = fabricante;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (!obj.getClass().equals(getClass())) {
            return false;
        }

        Modelo castedObj = (Modelo) obj;
        return ObjectUtils.equals(getId(), castedObj.getId());
    }


    @Override
    public String toString() {
        return new ToStringBuilder(this)
                   .append("id", getId())
                   .append("nombre", getNombre())
                   .toString();
    }
}

豆类的超类

public class AbstractObject<T>  {

    /**
     *
     */
    private static final long serialVersionUID = 7717102673045778131L;
    /**
     * The object id
     */
    private T id;
    private String nombre;


    /**
     * Setter for attribute "id"
     * @param id the object id
     *
    public void setId(T id) {
        this.id = id;
    }

    /**
     * Getter for attribute "id"
     * @return the object id
     *
    public T getId() {
        return id;
    }

    public String getNombre() {
        return nombre;
    }

    public void setNombre(String nombre) {
        this.nombre = nombre;
    }

}

提前致谢。