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Instance: the text box for dynamically adding and deleting uploaded files

Source: Internet
Author: User
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Instance: the text box for dynamically adding and deleting uploaded files

<% @ Page Language ="Java"Import ="Java. util .*"Pageencoding =UTF-8"%>

<%

String Path = request. getcontextpath ();

String basepath = request. getscheme () + ": //" + request. getservername () + ":" + request. getserverport () + path + "/";

%>

Upload. jsp

<SCRIPT type ="Text/JavaScript">

FunctionAddFile (){

VaRFiles = Document. getelementbyid ("Files ");

VaRInput = Document. createelement ("input ");

Input. Name = "file ";

Input. type = "file ";

VaRDelbutton = Document. createelement ("input ");

Delbutton. type = "button ";

Delbutton. value = "delete ";

Delbutton. onclick =FunctionDel (){

This. Parentnode. parentnode. removechild (This. Parentnode );

}

VaRDIV = Document. createelement ("Div ");

Div. appendchild (input );

Div. appendchild (delbutton );

Files. appendchild (DIV );

}

</SCRIPT>

</Head>

<Body>

<Form action ="$ {Pagecontext. Request. contextpath}/Servlet/uploadservlet"Enctype ="Multipart/form-Data"Method ="Post">

Upload user <input type ="Text"Name ="Username"/> <Br/>

File 1 <input type ="File"Name ="File1"/> <Br/>

File 2 <input type ="File"Name ="File2"/> <Br/>

<Input type ="Submit"Value ="Submit"/> <Br/>

</Form>

<Br/> <br> <HR/>

CommonsFileuploadDemo: <br/>

<Form action ="$ {Pagecontext. Request. contextpath}/Servlet/uploadservlet2"Enctype ="Multipart/form-Data"Method ="Post">

Upload user <input type ="Text"Name ="Username"/> <Br/>

File 1 <input type ="File"Name ="File1"/> <Br/>

File 2 <input type ="File"Name ="File2"/> <Br/>

<Input type ="Submit"Value ="Submit"/> <Br/>

</Form>

<HR/>

<Form action ="$ {Pagecontext. Request. contextpath}/Servlet/uploadservlet2"Enctype ="Multipart/form-Data"Method ="Post">

<Table>

<Tr>

<TD>

User name:

</TD>

<TD>

<Input type ="Text"Name ="Username">

</TD>

</Tr>

<Tr>

<TD> </TD>

<TD>

<Input type ="Button"Value ="Add file"Onclick = "AddFile ()">

</TD>

</Tr>

<Tr>

<TD> </TD>

<TD>

<Div id ="Files"> </Div>

</TD>

</Tr>

<Tr>

<TD> </TD>

<TD>

<Input type ="Submit"Value ="Upload files">

</TD>

</Tr>

</Table>

</Form>

</Body>

</Html>

Uploadservlet. Java

Public voidDopost (httpservletrequest request, httpservletresponseresponse)

ThrowsServletexception, ioexception {

 

Inputstream is = request. getinputstream ();

Byte[] Buff =New byte[1024];

IntLen = 0;

While(LEN = is. Read (buff)> 0 ){

System.Out. Println (NewString (buff, 0, Len ));

}

}

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