Plupload上传组件 + java实现文件上传例子

var uploader = new plupload.Uploader({
runtimes : 'silverlight',
browse_button : 'pickfiles',
container : 'container',
max_file_size : '20mb',
url:"/"+CONTEXT_NAME+"/importFromExcelAction.uploadExcelFile.do",
multipart: true,
chunk_size : '10mb',//把大文件分割
unique_names : true,
urlstream_upload : true,
multiple_queues : false,
filters : [{title : "Excel文件", extensions : "xls,xlsx"}],
silverlight_xap_url : '/'+CONTEXT_NAME+'/modules/common/attach/plupload/script/plupload.silverlight.xap'
});
uploader.bind("Init",function(up,params){
$J('#filelist').html("
Current runtime: " + params.runtime + "
");
});
uploader.bind("FilesAdded",function(up,files){
$J.each(files, function(i, file) {
$J('#filelist').append(
'
' +
file.name + ' (' + plupload.formatSize(file.size) + ') ' +
'
');
});
up.refresh();
});

$J("#uploadfiles").click(function(e){
uploader.start();
e.preventDefault();
})

uploader.bind('UploadProgress', function(up, file) {
$J('#' + file.id + " b").html(file.percent + "%");
});

uploader.bind('Error', function(up, err) {
$J('#filelist').append("
Error: " + err.code +
", Message: " + err.message +
(err.file ? ", File: " + err.file.name : "") +
"
"
);
up.refresh(); // Reposition Flash/Silverlight
});

uploader.bind('FileUploaded', function(up, file) {
$J('#' + file.id + " b").html("100%");
$J('#filelist').append("上传成功...
");
$J('#filelist').append("开始处理Excel数据...
");
var request = $J.ajax({
url:'/'+CONTEXT_NAME+'/importFromExcelAction.importExcel.do',
type:"post",
data:{
template:$J("#selectTemplate").val(),
fileName:file.name
}
});

// 定时获取导入状态
var task = window.setInterval("getImportStatus()",5000);

request.done(function(data){
$J('#filelist').append("success:"+data.success+",msg:"+data.msg+"
");
window.clearInterval(task);
});
request.fail(function(jqXHR, textStatus){
$J('#filelist').append("请求处理Excel数据失败:"+textStatus+"
");
window.clearInterval(task);
});

});

uploader.init();

/**
*
使用plupload组件上传文件

* @param request
* @param response
* @param rePath 保存文件的相对路径，以WebRoot为根
* @return
*/
public static String uploadFiles(HttpServletRequest request,HttpServletResponse response, String rePath){
String filename = null;
int chunk = 0;// 当前正在处理的文件分块序号
int chunks = 0;//分块上传总数
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
// 判断当前表单是否为"multipart/form-data"
if (isMultipart) {
ServletFileUpload upload = new ServletFileUpload();
//webroot绝对路径
String webRootPath = FileHelper.getServerWebRoot();
try {
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream input = item.openStream();

if("chunk".equals(name)) {
chunk = Integer.valueOf(Streams.asString(input));
continue;
}
if("chunks".equals(name)) {
chunks = Integer.valueOf(Streams.asString(input));
continue;
}

// Handle a multi-part MIME encoded file.
if (!item.isFormField()) {
// 文件名
filename = item.getName();
// 保存文件目录绝对路径
File dir = new File(webRootPath+rePath);
if(!dir.isDirectory() || !dir.exists()){
dir.mkdir();
}

//保存文件绝对路径
String fullPath = webRootPath+rePath+"/"+filename;
if(chunk == 0){
File file = new File(fullPath);
if(file.exists()){
file.delete();
}
//上传文件
FileHelper.uploadFile(input, fullPath);
}
if(chunk > 0){
//追加文件
FileHelper.uploadFile(input, fullPath, true);
}
if(chunk+1 == chunks || chunks == 0){
break;
}
}
}
}
catch (Exception e) {
log.error(e, e.fillInStackTrace());
e.printStackTrace();
}
}

return filename;
}