文件上傳使用：http://www.javazoom.net 的 UploadBean JAVA包，他的文件上傳做的還不錯，可進行目錄或數(shù)據(jù)庫的文件上傳，默認(rèn)使用的是Oracle 的LONGRAW子段類型，可使用BLOB類型，但需要使用擴展JAVA包，LONGRAW子段最大長度為2GB，并且一個表內(nèi)只答應(yīng)出現(xiàn)一個LONGRAW型子段， 不過已經(jīng)夠我用了，而BLOB型子段最大為4GB，而且沒有表中出現(xiàn)次數(shù)的限制。備注：想用他下載的組件Download4J 1.0，我勸還是別做夢了，在功能上不太適合用在數(shù)據(jù)庫下載。
文件下載使用的是：http://www.jspsmart.com的SmartUpload JAVA包，該包即可以文件上傳，也可以文件下在，而且使用也比較方便，不過我在這里只使用文件從數(shù)據(jù)庫下載功能，有愛好的朋友可以試試。
下面我把使用這兩個包的源CODE給大家說一下，以后大家碰道這些問題就不用象我一樣發(fā)愁了，哎！多偉大的人呀！大家給點掌聲安慰我這個受傷的孤獨男人吧！
文件上傳：
實際上這些ＪＡＶＡ包都有使用的例子，不過我還是要貼出來。
文件名：ChineseDatabaseUpload.jsp
文件內(nèi)容：
<Html>
<%@ page language="java" contentType="text/html; charset=gb2312" import="javazoom.upload.*,java.util.*" %>
<%@ page errorPage="ExceptionHandler.jsp" %>
<jsp:useBean id="upBean" scope="application" class="javazoom.upload.UploadBean" >
<%
PRoperties props = new Properties();
props.put("user","cepic");
props.put("passWord","lpsc");
upBean.setDatabasestore("oracle.jdbc.driver.OracleDriver","jdbc:oracle:thin:@10.231.234.252:1521:cepic",props); //數(shù)據(jù)庫連接
%>
</jsp:useBean>
<head>
<title>中文上傳</title>
<meta http-equiv="Content-Type" content="text/html; charset="gb2312">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<ul><font size="-1" face="Verdana, Arial, Helvetica, sans-serif">
<%
request.setCharacterEncoding("gb2312");
if (MultipartFormDataRequest.isMultipartFormData(request))
{
// Uses MultipartFormDataRequest to parse the HTTP request.
MultipartFormDataRequest mrequest = new MultipartFormDataRequest(request,null,100*1024*1024,MultipartFormDataRequest.COSPARSER,"gb2312");
String todo = mrequest.getParameter("todo");
if ( (todo != null) && (todo.equalsIgnoreCase("upload")) )
{
Hashtable files = mrequest.getFiles();
if ( (files != null) (!files.isEmpty()) )
{
UploadFile file = (UploadFile) files.get("uploadfile");
out.println("<li>Form field(表格欄): uploadfile"+"<BR> Uploaded file(已上傳的文件名稱): "+file.getFileName()+" ("+file.getFileSize()+" bytes)"+"<BR> Content Type(文件類別)"+file.getContentType());
//out.println("<li>Form field: uploadfile"+"<BR> Uploaded file: "+file.getFileName()+" ("+file.getFileSize()+" bytes)"+"<BR> Content Type"+file.getContentType());
// Uses the bean now to store specified by jsp:setProperty at the top.
upBean.store(mrequest, "uploadfile");
}
else
{
out.println("<li>No uploaded files");
}
out.println("<BR> gb2312 Text(簡體) = "+mrequest.getParameter("gb2312txt"));
}
else out.println("<BR> todo="+todo);
}
%>
</font></ul>
<form method="post" action="ChineseDatabaseUpload.jsp" name="upform" enctype="multipart/form-data">
<table width="60%" border="0" cellspacing="1" cellpadding="1" align="center">
<tr>
<td align="left"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif"><b>請選擇上傳文件:</b></font></td>
</tr>
<tr>
<td align="left"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif">
<input type="file" name="uploadfile" size="50">
</font></td>
</tr>
<tr>
<td align="left"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif">
gb2312 text:
<input type="text" name="gb2312txt" size="20">
</font></td>
</tr>
<tr>
<td align="left"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif">
<input type="hidden" name="todo" value="upload">
<input type="submit" name="Submit" value="上傳">
<input type="reset" name="Reset" value="取消">
</font></td>
</tr>
</table>
<br>
<br>
<table width="90%" border="0" cellspacing="1" cellpadding="0" align="center">
<tr>
<td bgcolor="#666666">
<table width="100%" border="0" cellspacing="1" cellpadding="0" align="center">
<tr>
<td bgcolor="#FFFFFF"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif"><b><font color="#0000FF"> Needed
HTML tags :</font></b></font></td>
</tr>
<tr>
<td bgcolor="#FFFFFF"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif"> <<b>form</b>
<b>method</b>="<b><font color="#FF0000">post</font></b>"
<b>action</b>="<b><font color="#FF0000">ChineseUpload.jsp</font></b>"
name="upload" <b>enctype</b>="<b><font color="#FF0000">multipart/form-data</font></b>"></font></td>
</tr>
<tr>
<td bgcolor="#FFFFFF"><font size="-1" face="Verdana, Arial, Helvetica, sans-serif"> <<b>input</b>
<b>type</b>="<b><font color="#FF0000">file</font></b>"
<b>name</b>="<font color="#FF0000"><b>uploadfile</b></font>"
size="50"></font></td>
</tr>
</table>
</td>
</tr>
</table>
<p> </p>
<p> </p>
<p align="center"> </p>
<p align="center"> </p>
<p align="center"> </p>
<p align="center"> </p>
</form>
</body>
</html>
該ORACLE的表結(jié)構(gòu)，在該網(wǎng)站上找吧！很簡單就三個子段而已。
文件下載：
文件名：jspsmartdownload.jsp
文件內(nèi)容：
<meta http-equiv="Content-Type" content="application/msword; charset=gb2312"> //注重這里，假如你沒有設(shè)置成“GB2312”結(jié)果你會明白的。
<%@ page language="java" import="java.sql.*,com.jspsmart.upload.*"%>
<jsp:useBean id="mySmartUpload" scope="page" class="com.jspsmart.upload.SmartUpload" />
<%
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@10.231.234.252:1521:cepic", "cepic", "lpsc");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM UPLOADS");
if (rs.next()){
mySmartUpload.initialize(pageContext);
mySmartUpload.downloadField(rs,"BINARYFILE","application/msword","");
//mySmartUpload.fieldToFile(rs,"BINARYFILE","c:/sample.DOC");
}
rs.close();
stmt.close();
con.close();
%>
