richfaces fileupload

web.xml

 

        <filter>
    <display-name>RichFaces Filter</display-name>
    <filter-name>richfaces</filter-name>
    <filter-class>org.ajax4jsf.Filter</filter-class>
    <init-param>
<param-name>createTempFiles </param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>maxRequestSize </param-name>
<param-value>10000000 </param-value>
</init-param>
  </filter>

 

 

xhtml:

 

<rich:fileUpload id="fileupload" fileUploadListener="#{fileUploadBean.uploadListener}"
    maxFilesQuantity="5" autoclear="false" addControlLabel="添加图片"
    uploadControlLabel="上传" clearAllControlLabel="清除所有"
    clearControlLabel="清除" cancelEntryControlLabel="取消"
    stopControlLabel="停止" stopEntryControlLabel="停止" noDuplicate="true"
    listHeight="400" listWidth="515" style="height:100;"
    acceptedTypes="jpg, gif, png, bmp,txt,jar">
    <f:facet name="label">
     <h:outputText value="{_KB}KB from {KB}KB uploaded --- {mm}:{ss}"/>
    </f:facet>
   </rich:fileUpload>         
   <h:outputText value="支持 JPG、JPEG、GIF、BMP 和 PNG 文件格式，最大4M。">

 

 

bean:

 

 public void uploadListener(UploadEvent event) {
         //获取传过来的items,3.2.2之前版本不支持getUploadItems方法
         List itemList = event.getUploadItems();
         for(int i=0 ; i<itemList.size() ; i++){
             try {           
                 UploadItem item = (UploadItem) itemList.get(i);
                 //产生一个随机的文件名
                 File file = new File("d:\\"+UUID.randomUUID().toString()+".jpg");
                 //大小不能超过4M
                 if(item.getFileSize() <= 4000000){
                     FileInputStream fis = new FileInputStream(item.getFile());  
                     FileOutputStream out = new FileOutputStream(file);  
                     int bytes = 0;  
                     byte[] bteFile = new byte[1024];  
                     while ((bytes = fis.read(bteFile)) != -1) {  
                         out.write(bteFile, 0, bytes);  
                     }
                     fis.close();
                     out.close();                   
                 }
             } catch (Exception e) { 

             }            
         }
     }

评论

1 楼 zhiblin 2009-05-27  

为什么我使用这个标签的时候会报一个java.lang.NullPointerException
楼主有遇到吗