上传进度条代码
⑴ 怎样实现在android实现带进度条的上传效果
实现在android实现带进度条的上传效果效果如图：
用到以下两个类就可实现带进度条的文件上传：
1、CustomMultiPartEntity extends MultipartEntity,
2、HttpMultipartPost extends AsyncTask
代码如下：
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
public class CustomMultipartEntity extends MultipartEntity {
private final ProgressListener listener;
public CustomMultipartEntity(final ProgressListener listener) {
super();
this.listener = listener;
}
public CustomMultipartEntity(final HttpMultipartMode mode, final ProgressListener listener) {
super(mode);
this.listener = listener;
}
public CustomMultipartEntity(HttpMultipartMode mode, final String boundary,
final Charset charset, final ProgressListener listener) {
super(mode, boundary, charset);
this.listener = listener;
}
@Override
public void writeTo(final OutputStream outstream) throws IOException {
super.writeTo(new CountingOutputStream(outstream, this.listener));
}
public static interface ProgressListener {
void transferred(long num);
}
public static class CountingOutputStream extends FilterOutputStream {
private final ProgressListener listener;
private long transferred;
public CountingOutputStream(final OutputStream out, final ProgressListener listener) {
super(out);
this.listener = listener;
this.transferred = 0;
}
public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
this.transferred += len;
this.listener.transferred(this.transferred);
}
public void write(int b) throws IOException {
out.write(b);
this.transferred++;
this.listener.transferred(this.transferred);
}
}
}
该类计算写入的字节数，我们需要在实现ProgressListener中的trasnfered()方法，更行进度条
public class HttpMultipartPost extends AsyncTask<HttpResponse, Integer, TypeUploadImage> {
ProgressDialogpd;
longtotalSize;
@Override
protectedvoidonPreExecute(){
pd= newProgressDialog(this);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setMessage("Uploading Picture...");
pd.setCancelable(false);
pd.show();
}
@Override
(HttpResponse... arg0) {
HttpClienthttpClient = newDefaultHttpClient();
HttpContexthttpContext = newBasicHttpContext();
HttpPosthttpPost = newHttpPost("http://herpderp.com/UploadImage.php");
try{
= newCustomMultipartEntity(
newProgressListener() {
@Override
public void transferred(longnum){
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
// We use FileBody to transfer an image
multipartContent.addPart("uploaded_file", newFileBody(
newFile(m_userSelectedImagePath)));
totalSize= multipartContent.getContentLength();
// Send it
httpPost.setEntity(multipartContent);
HttpResponseresponse = httpClient.execute(httpPost, httpContext);
String serverResponse = EntityUtils.toString(response.getEntity());
ResponseFactoryrp = newResponseFactory(serverResponse);
return(TypeImage) rp.getData();
}
catch(Exception e) {
System.out.println(e);
}
returnnull;
}
@Override
protectedvoidonProgressUpdate(Integer... progress){
pd.setProgress((int) (progress[0]));
}
@Override
protectedvoidonPostExecute(TypeUploadImageui) {
pd.dismiss();
}
}
在 transferred()函数中调用publishProgress((int) ((num / (float) totalSize) * 100));
在onProgressUpdate()实现上传进度的更新操作
⑵ asp 如何实现带进度条的上传文件功能
以下就以abcupload4为例来说明怎么来制作实时的文件上传进度条。
（注：我们在abcupload自带例子基础上改进。）
progressupload.htm（上传文件的前台提交，我们让进度条在这个里面显示）
<HTML>
<body>
<script language="javascript">
<!--
theUniqueID = (new Date()).getTime() % 1000000000;
function s() //让数据提交的同时执行显示进度条的函数
{
bar(); //开始执行反映上传情况的函数
document.myform.action = "progressupload.ASP?ID=" theUniqueID; //处理上传数据的程序
document.myform.target="up" //将提交的数据放在一个名字是up隐藏的iframe里面处理，这样提交的页面就不会跳转到处理数据的页
document.myform.submit(); //提交表单
}
function bar()
{
bar1.style.display=''; //让显示上传进度显示的层的可见
var timeoutid=null; //这个变量是作定时器的ID
var oXMLDoc = new ActiveXObject('MSXML'); //创建'MSXML'对象
sURL = "progressbar.ASP?ID=" theUniqueID "&temp=" Math.random(); //获取上传状态数据的地址
oXMLDoc.url = sURL; //load数据
var oRoot=oXMLDoc.root; //获取返回XML数据的根节点
if(oRoot.children != null)
{
if (oRoot.children.item(0).text-100==0) //文件上传结束就取消定时器
clearTimeout(timeoutid)
PercentDone.style.width=oRoot.children.item(0).text "%"; //设置进度条的百分比例
//根据返回的数据在客户端显示
min.innerHTML=oRoot.children.item(1).text; //显示剩余时间（分钟）
secs.innerHTML=oRoot.children.item(2).text; //显示剩余时间（秒钟）
BytesDone.innerHTML=oRoot.children.item(3).text; //已上传数据大小
BytesTotal.innerHTML=oRoot.children.item(4).text; //总大小
BytesPerSecond.innerHTML=oRoot.children.item(5).text; //传输速率
Information.innerHTML=oRoot.children.item(6).text; //上传信息
}
if (oRoot.children.item(0).text-100<0) //只要文件没有传完，就每隔多少时间获取一次数据
timeoutid = setTimeout("bar()",50) //这里设定时间间隔是0.05秒，你也可以根据你的情况修改获取数据时间间隔
}
//-->
</script>
<form name="myform" method="post" action="progressupload.ASP" enctype="multipart/form-data" target=up>
<input type="file" name="filefield1"><br>
<input type="button" name="dosubmit" value="Upload" onclick="s()"><br>
<div id=bar1 style="display:none">
<table border="0" width="100%">
<tr>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>传送:</b></font></td>
</tr>
<tr bgcolor="#999999">
<td>
<table border="0" width="" cellspacing="1" bgcolor="#0033FF" id=PercentDone>
<tr>
<td><font size=1></font></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table border="0" width="100%">
<tr>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="1">剩余时间:</font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="1">
<span id=min></span> 分
<span id=secs></span> 秒
(<span id=BytesDone></span> KB of
<span id=BytesTotal></span> KB 已上传)</font></td>
</tr>
<tr>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="1">
传送速度:</font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="1">
<span id=BytesPerSecond></span> KB/秒</font></td>
</tr>
<tr>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="1">信息:</font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><span id=Information></span></font></td>
</tr>
</table>
</td>
</tr>
<tr></tr>
</table>
</div>
<iframe name="up" style="display:none"></iframe>
</form>
</body>
</HTML>
progressbar.ASP（返回上传状况数据的文件）
<%@EnableSessionState=False%>
<%
On Error Resume Next
Set theProgress = Server.CreateObject("ABCUpload4.XProgress") '创建上传组件对象
theProgress.ID = Request.QueryString("ID")
'将返回数据以XML格式输出
%>
<?XML version="1.0" encoding="gb2312" ?>
<plan>
<PercentDone><%=theProgress.PercentDone%></PercentDone>
<min><%=Int(theProgress.SecondsLeft/60)%></min>
<secs><%=theProgress.SecondsLeft Mod 60%></secs>
<BytesDone><%=Round(theProgress.BytesDone / 1024, 1)%></BytesDone>
<BytesTotal><%=Round(theProgress.BytesTotal / 1024, 1)%></BytesTotal>
<BytesPerSecond><%=Round(theProgress.BytesPerSecond/1024, 1)%></BytesPerSecond>
<Information><%=theProgress.Note%></Information>
</plan>
progressupload.ASP（处理上传文件）
<%@EnableSessionState=False%>
<%
Response.Expires = -10000
Server.ScriptTimeOut = 300
Set theForm = Server.CreateObject("ABCUpload4.XForm")
theForm.Overwrite = True
theForm.MaxUploadSize = 8000000
theForm.ID = Request.QueryString("ID")
Set theField = theForm("filefield1")(1)
If theField.FileExists Then
theField.Save theField.FileName
End If
%>
<HTML>
<body>
传送结束
</body>
</HTML>
⑶ c#中，上传文件需要进度条，应该怎样使用
c#有一个progressBar控件就是进度条，开线程，线程函数中加循环，循环执行progressBar1.Value=(int)（(已上传大小/总大小)*100）来显示当前进度。
⑷ 使用jquery.form.js实现文件上传及进度条前端代码
ajax的表单提交只能提交data数据到后台，没法实现file文件的上传还有展示进度功能，这里用到form.js的插件来实现，搭配css样式简单易上手，而且高大上，推荐使用。
需要解释下我的结构， #upload-input-file 的input标签是真实的文件上传按钮，包裹form标签后可以实现上传功能， #upload-input-btn 的button标签是展示给用户的按钮，因为需要样式的美化。上传完成生成的文件名将会显示在 .upload-file-result 里面， .progress 是进度条的位置，先让他隐藏加上 hidden 的class， .progress-bar 是进度条的主体， .progress-bar-status 是进度条的文本提醒。
去掉hidden的class，看到的效果是这样的
[图片上传失败...(image-2c700a-1548557865446)]
将上传事件绑定在file的input里面，绑定方式就随意了。
var progress = $(".progress-bar"), status = $(".progress-bar-status"), percentVal = '0%'; //上传步骤 $("#myupload").ajaxSubmit({ url: uploadUrl, type: "POST", dataType: 'json', beforeSend: function () { $(".progress").removeClass("hidden"); progress.width(percentVal); status.html(percentVal); }, uploadProgress: function (event, position, total, percentComplete) { percentVal = percentComplete + '%'; progress.width(percentVal); status.html(percentVal); console.log(percentVal, position, total); }, success: function (result) { percentVal = '100%'; progress.width(percentVal); status.html(percentVal); //获取上传文件信息 uploadFileResult.push(result); // console.log(uploadFileResult); $(".upload-file-result").html(result.name); $("#upload-input-file").val(''); }, error: function (XMLHttpRequest, textStatus, errorThrown) { console.log(errorThrown); $(".upload-file-result").empty(); } });
[图片上传失败...(image-3d6ae0-1548557865446)]
[图片上传失败...(image-9f0adf-1548557865446)]
更多用法可以 参考官网