紧急求救：怎样在jsp中实现文件的上传和下载.

java在网络间传递数据是采用 ISO8859-1 编码的，如果客户端不解码，中文当然是乱码了。
com.jspsmart.upload.SmartUpload控件需要下载，给分吧html 页面文件
<html><head>
<meta http-equiv="Content-Language" content="zh-cn">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>ÏµÍ³Î¬»¤</title>
</head><script LANGUAGE="javascript">
function my_ok() {
var str = form1.filename.value; if (str=='')
{
alert("ÇëÑ¡ÔñÒ»ÌõÎÄ¼þ");
form1.filename.focus();
return false;
}

form1.submit(); }
</script>
<body><h1 align="center"><font color="#FF00FF">ÉÏ´«ÎÄ¼þ</font></h1>
<hr>
<form id=form1 ENCTYPE="multipart/form-data" action="upload.jsp" method="POST">  <table border="1" width="85%" height="57">
    <tr>
      <td width="10%" height="25">²¿  ÃÅ</td>
      <td width="90%" height="25"><input type="text" name="dept" size="65"></td>
    </tr>
    <tr>
      <td width="10%" height="25">²Ù×÷Õß</td>
      <td width="90%" height="25"><input type="text" name="actor" size="65"></td>
    </tr>
    <tr>
      <td width="10%" height="25">±ê  Ìâ</td>
      <td width="90%" height="25"><input type="text" name="title" size="65"></td>
    </tr>
    <tr>
      <td width="10%" height="25">ÎÄ¼þÃû</td>
      <td width="90%" height="25"><input type="file" name="filename" size="65"></td>
    </tr>
    <tr>
      <td width="10%" height="25">À¸  Ä¿</td>
      <td width="90%" height="25"><select size="1" name="item">
          <option>Áìµ¼»î¶¯</option>
          <option>»áÒé°²ÅÅ</option>
          <option>Í¨Öª¹«¸æ</option>
        </select></td>
    </tr>
  </table>
  <p><input type="button" value="Ìá½»" name="B1" onClick="javascript:my_ok();"><input type="reset" value="È«²¿ÖØÐ´" name="B2"></p>
</form></body></html>JSP文件
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="com.jspsmart.upload.*"%>
<%@ page import="database.mssql_bean"%>
<%@ page import="java.sql.*"%> <% SmartUpload mySmartUpload = new SmartUpload(); int count=0;

mySmartUpload.initialize(pageContext);             //³õÊ¼»¯
mySmartUpload.setTotalMaxFileSize(5000000);        //ÎÄ¼þ×î´ó³ß´ç5M
mySmartUpload.upload();    //ÉÏ´«

String filename = mySmartUpload.getFiles().getFile(0).getFileName();

String dept = mySmartUpload.getRequest().getParameter("dept");
String actor = mySmartUpload.getRequest().getParameter("actor");
String title = mySmartUpload.getRequest().getParameter("title");
String item = mySmartUpload.getRequest().getParameter("item");

    String sql = "insert into doc(item,title,time,dept,actor,filename) select (select item from itemlist where descr='"+item+"'),'"+title+"',"+"getdate(),'"+dept+"','"+actor+"','doc/"+filename+"'";
mssql_bean mb = new mssql_bean();
    String temp = null;
    temp = mb.getconn();
temp = mb.modify(sql);
mb.close();

try {
count = mySmartUpload.save("/upload");     //´æÅÌ
%>
<script LANGUAGE="javascript">
alert ("ÉÏ´«³É¹¦!");
</script>
<%
    }
catch (Exception e)
    {
%>
<script LANGUAGE="javascript">
alert ("ÉÏ´«Ê§°Ü,ÇëÔÙÊÔÒ»´Î!");
window.location="upload.htm";
</script>
<%
    }
%>
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>New Page 1</title>
</head><script>
function ex() {
   window.location="upload.htm";
}
</script><body><h1 align="center"><font color="#FF00FF">ÉÏ´«ÎÄ¼þ½á¹û</font></h1>
<hr>
<form id=form1 method="post" action="upload.htm">  <table border="1" width="85%" height="57">
    <tr>
      <td width="10%" height="25">²¿  ÃÅ</td>
      <td width="90%" height="25"><%=dept%></td>
    </tr>
    <tr>
      <td width="10%" height="25">²Ù×÷Õß</td>
      <td width="90%" height="25"><%=actor%></td>
    </tr>
    <tr>
      <td width="10%" height="25">±ê  Ìâ</td>
      <td width="90%" height="25"><%=title%></td>
    </tr>
    <tr>
      <td width="10%" height="25">ÎÄ¼þÃû</td>
      <td width="90%" height="25"><%=filename%></td>
    </tr>
    <tr>
      <td width="10%" height="25">À¸  Ä¿</td>
      <td width="90%" height="25"><%=item%></td>
    </tr>
  </table>
  <p align="center"><input type="submit" value="·µ    »Ø" name="B1"></p>
</form></body></html>
需要用到第三方的bean，我自己做了一个，要的话给发email给我，
http://expert.csdn.net/Expert/topic/1654/1654590.xml?temp=.3409845

调试易

紧急求救：怎样在jsp中实现文件的上传和下载.

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