Uploadify上傳和最原始的下載

上傳是用Uploadify實現的，下載是最原始的方式寫的

html頁面：

引入了 <script type="text/javascript" src="$stylePath/resources/js/swfobject.js"></script>
<script type="text/javascript" src="$stylePath/resources/js/jquery.uploadify.v2.1.0.min.js"></script>
<link rel="stylesheet" href="$stylePath/resources/styles/uploadify.css" type="text/css" media="screen"/>

<body>
<form id="userForm" method="post">
<div class="wrap_item">

<input id="id" name="id" type="hidden"/>
<ul>
<li>
<label>標題：</label>
<input type="text" id="title" name="title" class="js_area"/>
</li>
<li>
<label>描述：</label>
<textarea rows="" cols="" id="description" name="description"></textarea>
<span class="text">文本長度限制200個字符</span>
<input type="hidden" name="filePath" id="filePath"/>
<input type="hidden" name="fileNameSystem" id="fileNameSystem"/>
<input type="hidden" name="fileNameActual" id="fileNameActual"/>
</li>
<li>
<label>文件</label>
<div id="file_upload"></div>
<div id="file_list"></div>
</li>
</ul>
</div>
<div class="btn_div">
<input type="button" class="Btn_save" value="上 傳" onclick="$('#file_upload').uploadifyUpload();" id="saveArea"/>
<input type="button" class="Btn_save" value="保 存" onclick="savePlacard()" id="saveArea"/><input type="button" class="Btn_cancle" onclick="closeWin()" value="取 消" id="exitArea"/>
</div>
</form>
</body>

js代碼：

$(function(){
$('#file_upload').uploadify({
'uploader' : '$stylePath/resources/imgs/uploadify.swf',
'script' : $().getRealPath()+'/ccms/placard/placard/upload',
'fileDataName' : 'file',
'cancelImg' : '$stylePath/resources/imgs/cancel.png',
'multi' : false,
'onComplete': function(event, queueID, fileObj, response, data) {
$(this).each(function(i) {
var strs=response;
//strs=strs.substring(1,strs.indexOf("]"));
strs=strs.replace("/\'/g","");
strs=strs.replace("/\"/g","");
var str=strs.split(",");
$("#filePath").val(str[0]);
$("#fileNameSystem").val(str[1]);
$("#fileNameActual").val(str[2]);
});
},
'onAllComplete': function(event, data) {
$("#file_list").html("本次上傳文件： " + data.filesUploaded + " 個，文件總大小： " + data.allBytesLoaded + " KB，平均上傳速度： " + data.speed + "kb/s");
},
'onError': function(event, queueID, fileObj) {
alert("文件:" + fileObj.name + " 上傳失敗");

}
});
});

save方法

後臺資源方法

@POST
@Produces("text/plain")
@Path("/upload")
public String load(@Context HttpServletRequest request) throws Exception {
request.setCharacterEncoding("UTF-8");
String fileName ="";
String fileNewName="";
String fileRepository =request.getSession().getServletContext().getRealPath("")+ File.separatorChar+"upload"+File.separatorChar;
String filePath=File.separatorChar+"upload"+File.separatorChar;
String fileType="";
if (ServletFileUpload.isMultipartContent(request)) {
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
List<FileItem> items = null;
try {
items = upload.parseRequest(request);
} catch (FileUploadException e) {
e.printStackTrace();
}
if (items != null) {
Iterator<FileItem> iter = items.iterator();
while (iter.hasNext()) {
FileItem item = iter.next();
if (!item.isFormField() && item.getSize() > 0) {
fileName = processFileName(item.getName());
fileType=getFileType(fileName);
fileNewName=getFileName(fileName)
+new SimpleDateFormat("yyyyMMddHHmmssSSS") .format(new Date() )+fileType;
fileRepository=fileRepository+fileNewName;
filePath=filePath+fileNewName;
try {
item.write(new File(fileRepository));
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
return fileRepository + ","+fileNewName+","+fileName;
}

------------------------------------------以上是上傳--------------------------------------------------------

------------------------------------------以上是下載--------------------------------------------------------

下載js

//獲取上傳的文件列表，這個在不同項目中是可變的

//點擊要下載的文件時候，--------這個地方千萬要注意，就是不要用ajaxSubmit 進行提交表單，否則會出現瀏覽器不會彈出下載框，在響應裏面你會看到，你要

下載的東西全都成了文本流，切記

function exportFile(id){
$("#pracardId").val(id);
$("#exportForm").attr("action",$().getRealPath()+"/ccms/placard/placard/export");

//$("#exportForm").ajaxSubmit();
$("#exportForm").submit();
}

下載資源後臺代碼

@POST
@Path("/export")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces({ MediaType.APPLICATION_OCTET_STREAM })
public void export(MultivaluedMap<String, String> map) throws Exception {
PlacardServiceImpl placardServiceImpl = BeanUtils.getBean(
"placardServiceImpl", PlacardServiceImpl.class);
PlacardModel model = MEJUntils.paramsInto(map, PlacardModel.class);
model = placardServiceImpl.portalPagePlacardList(model).get(0);
try {
File file = new File(model.getFilePath());
// 取得文件名。
String filename = model.getFileNameActual();
// 取得文件的後綴名。
String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();
// 以流的形式下載文件。
InputStream fis = new BufferedInputStream(new FileInputStream(model.getFilePath()));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
// 清空response
getResponse().reset();
// 設置response的Header
getResponse().addHeader("Content-Disposition", "attachment;filename=" +java.net.URLEncoder.encode(filename, "UTF-8"));
getResponse().addHeader("Content-Length", "" + file.length());
OutputStream toClient = new BufferedOutputStream(getResponse().getOutputStream());
getResponse().setContentType("application/octet-stream");
toClient.write(buffer);
toClient.flush();
toClient.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}

個人覺得 java中Uploadify 文章這篇也比較好，

http://www.blogjava.net/yangxiang/archive/2009/07/29/288888.html

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