离线打包后uploader上传不能识别中文文件？

var task = plus.uploader.createUpload( "http://www.test.com/upload.do",
{ method:"POST",blocksize:204800,priority:100 },
function ( t, status ) {
// 上传完成
if ( status == 200 ) {
alert( "Upload success: " + t.url );
} else {
alert( "Upload failed: " + status );
}
}
);
status返回的是500