多文件上传 - JSF

Question

我正在使用JSF 1.2框架。现在，我正在尝试执行文件上传过程，其中要上传的文件数由最终用户控制。请找到下面的快照和代码片段以供参考。

XHTML实施： -

<a4j:commandLink action="#{importWSDLBean.xsdLoopIncrementAction}" reRender="WSDLPanelGrid"> 
<h:graphicImage value="/images/plus_icon.gif" /> 
</a4j:commandLink> 

<a4j:commandLink action="#{importWSDLBean.xsdLoopDecrementAction}" reRender="WSDLPanelGrid"> 
<h:graphicImage value="/images/minus_icon.gif" /> 
</a4j:commandLink> 

<h:panelGrid id="WSDLPanelGrid"> 
<c:forEach items="#{importWSDLBean.acscDataList}" var="inputFUpload"> 
    <t:inputFileUpload id="#{inputFUpload.id}" value="#{inputFUpload.value}" /> 
</c:forEach> 
</h:panelGrid> 

的Java bean的实现： -

public String xsdLoopIncrementAction() { 
    if (acscDataList == null) { 
     acscDataList = new ACSCDataList(new ArrayList()); 
     HtmlInputFileUpload htmlUpload = new HtmlInputFileUpload(); 
     htmlUpload.setId("upload" + (acscDataList.size() + 1)); 
     acscDataList.add(htmlUpload); 
    } else { 
     HtmlInputFileUpload htmlUpload = new HtmlInputFileUpload(); 
     htmlUpload.setId("upload" + (acscDataList.size() + 1)); 
     acscDataList.add(htmlUpload); 
    } 
    return "success"; 
} 


public String xsdLoopDecrementAction() { 
    if (acscDataList != null) { 
     if (acscDataList.size() > 0) { 
      acscDataList.remove(acscDataList.size() - 1); 
     } 
    } 
    return "success"; 
} 

此实现重置每当我递增或递减没有文件上传值。文件上传字段。此外，当我提交表单我无法获得UploadedFile对象（文件上传先决条件，如表单类型和Web.xml配置也包括在内）。

任何人都可以帮我吗？

Answer 1

是否阻止了您使用JSF 2？ Primefaces（www.primefaces.org）具有多个文件上传组件。它适用于JSF 1.2，但开发仅适用于JSF 2。

Answer 2

如果您创建了dinamically您的输入上传？在您的支持bean绑定属性

<h:panelGrid binding="#{importWSDLBean.myPanelGrid}"></h:panelGrid> 

添加属性

private javax.faces.component.html.HtmlPanelGrid myPanelGrid; 
/** 
* @return the myPanelGrid 
*/ 
public javax.faces.component.html.HtmlPanelGrid getMyPanelGrid() { 
    return myPanelGrid; 
} 



/** 
* @param myPanelGrid the myPanelGrid to set 
*/ 
public void setMyPanelGrid(javax.faces.component.html.HtmlPanelGrid myPanelGrid) { 
    this.myPanelGrid = myPanelGrid; 
} 
/*change for your value upload type*/ 
Map<String,Object> values = new LinkedHashMap<String, Object>(); 
public void addInputAction() { 



    String key = "key"+values.size(); 
      values.put(key,"newValue"); 

    HtmlInputText input = new HtmlInputText(); 
/*add input property (converter,css,etc?)*/ 
    input.setId("id_"+key); 

    input.setValueExpression("value", createValueExpression(
      "#{WSDLPanelGrid.values['"+key+"']}", new Class[0], String.class)); 
/*add to panel grid your input*/ 
    myPanelGrid.getChildren().add(input); 
} 

    public static ValueExpression createValueExpression(String value, 
     Class[] params, Class returnType) { 
    FacesContext fctx = FacesContext.getCurrentInstance(); 
    ELContext elctx = fctx.getELContext(); 
    Application jsfApp = fctx.getApplication(); 
    ExpressionFactory exprFactory = jsfApp.getExpressionFactory(); 

    ValueExpression valueExpr = exprFactory.createValueExpression(elctx, 
      value, returnType); 

    return valueExpr; 

}