用JSP/Servlets实现Web方式的文件上传

Use JSP and Servlet to Upload file to server is becoming a
common task now.
Below is a simple example use the jspsmart free component which
implements it.
You can download the free package from JSPSMART

1. Html File
<html>
<body>
<script LANGUAGE="javascript" SRC="JSFunction.js">
</script>
<script language="JavaScript">

</script>
<form name="uploadform" method="post"
action="uploadImage.jsp" ENCTYPE="multipart/form-data"
target=_self>
<center>
<table border="1" width="65%">
<tr>
<td colspan=2 nowrap align=center>广告图片上载</td>

</tr>
<tr>
<td width="15%" nowrap >广告图片:</td>
<td width="50%" nowrap><input type="file"
name="adsImage" size="20"></td>
</tr>
<tr>
<td align="center" colspan=2 >
<input type="button" value="upload" onclick="return
checkForm();" >
   
<input type="button" value="Cancel" onclick="return
cancelUpload();">
</td>

</tr>
</form>
</table>

<script language="JavaScript">

</script>
</body>

2. JSP File
<%@ page language="java" import="com.jspsmart.upload.*,
java.sql.*,java.util.* "%>
<%-- use SmartUpload bean --%>
<jsp:useBean id="mySmartUpload" scope="page"
class="com.jspsmart.upload.SmartUpload" />

<%

     //Initialization
    mySmartUpload.init(config);
    mySmartUpload.service(request,response);

    //Set Restriction
    mySmartUpload.setAllowedFilesList("gif,bmp,jpeg,jpg");
    mySmartUpload.setTotalMaxFileSize(51200);



    // Upload
    try{
    mySmartUpload.upload();
    }
    catch(Exception e){
    out.println("<font color=red>Upload File Fail!</font>
<a href=
      "JavaScript:window.history.back();">back</a><br>");
    out.println("<UI>Notes:</UI>");

    out.println("<UL>You must set correct File
Name.</UL>");
    out.println("<UL>You file size must be less than
50K.</UL>");
    out.println("<UL>You can only upload .Gif .jpeg .jpg and
.bmp files.</UL>");

    return;

    }
   //save file to disk
    mySmartUpload.getFiles().getFile(0).saveAs("/" +
"FileName");

　

%>

3. Servlet File (you can do it yourself)

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用JSP/Servlets实现Web方式的文件上传

用JSP/Servlets实现Web方式的文件上传