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一个用jsp开发的文件上传系统。利用javabean来实现的。来练习javabean.是一个完整系统

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                            <td bgcolor="#EEEEEE"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1">&lt;jsp:useBean 
                              id=&quot;upBean&quot; scope=&quot;session&quot; 
                              class=&quot;javazoom.upload.UploadBean&quot;&gt;<br>
                              </font></font></font></font></font></font></font></font><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1">&nbsp;&nbsp;&lt;jsp:setProperty 
                              name=&quot;<b>upBean</b>&quot; property=&quot;<b><font color="#FF0000">zipfilestore</font></b>&quot; 
                              <br>
                              &nbsp;&nbsp; value=&quot;<b>D:/Inetpub/customers/uploads.zip</b>&quot; 
                              /&gt;<br>
                              &lt;/jsp:useBean&gt;</font></font></font></font></font></font></font></font></td>
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                  <p><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><u><font size="-2"><b><font color="#333333">Notes</font></b></font></u><font color="#333333"><b><font size="-2"> 
                    : </font></b><font size="-2"><br>
                    1 - Appending process could be slow because UploadBean need 
                    to create a temporary archive. Try to avoid big archives.<br>
                    2 - Don't pay attention about &quot;/&quot; or &quot;\&quot; 
                    in path. UploadBean will use always use the good one.<br>
                    3 - </font><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-2">A 
                    full sample is available through <a href="../MultipleUploads.jsp">MultipleUploads.jsp</a></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font><br>
                    </font></font></font></font></font></font></font></font><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"></font></font></font></font></p>
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                      <td valign="top" bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><b><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><b><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><b><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font color="#FF0000"><img src="img/right_red-arrow.gif" width="18" height="14" align="absmiddle">&nbsp;</font></font></font></font></font></font></b></font></font></font></font></font><font color="#FF0000"></font></font></font></font></font></font></b></font></font></font></font></font><font color="#FF0000">Database 
                        </font></font></font><font color="#FF0000">:</font><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><b><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><b><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font color="#FF0000"><a name="database"></a></font></font></font></font></b></font></font></font></font></font></font></font></font></b></font></font></font></font></font></font></font></font></b></font></font></font></font></font></td>
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                  <p><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><b><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><img src="img/database.gif" width="33" height="35" align="left"></font></font></font></b></font></font></font></font></font><font face="Verdana, Arial, Helvetica, sans-serif" size="-1">UploadBean 
                    can store uploaded files in any database supporting long RAW 
                    data (i.e. binary files). You need a table (UPLOADS) with 
                    one column for upload identifiers (UPLOADID), one column for 
                    uploaded filenames (FILENAME) and one column for binary data 
                    (BINARYFILE). Note that you can modify tables and columns 
                    names through SQLUPLOAD* public static fields of UploadBean 
                    class. <br>
                    <br>
                    Two methods are available to initialize to JDBC connection 
                    :<br>
                    </font></font></font></font></font></font></font></font></font></p>
                  <ul>
                    <li><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1">public 
                      void <b>setDatabasestore</b>(String driver, String URL, 
                      Properties credentials)<br>
                      <font color="#666666">Inputs parameters are the JDBC driver 
                      identifier, the JDBC URL and some connection properties 
                      (usually login/password).</font><br>
                      <font color="#666666">This method will load the driver in 
                      memory and open a database connection. </font></font></font></font></font></font></font></font></font></font></li>
                    <li><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1">public 
                      void <b>setDatabasestore</b>(Connection jdbcconnection)<br>
                      <font color="#666666">Input parameter is a database connection 
                      that could come from a DataSource or any connection pool.</font><br>
                      </font></font></font></font></font></font></font></font></font></li>
                  </ul>
                  <p><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1">One<font face="Verdana, Arial, Helvetica, sans-serif" size="-1"> 
                    method is available to replace database store implementation 
                    :<br>
                    </font></font></font></font></font></font></font></font></font></p>
                  <ul>
                    <li><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1">public 
                      void <b>setDatabasestoreimplementation</b>(String newimpl)<br>
                      <font color="#666666">Inputs parameter is your extended 
                      DBStore classname. See note 5 below. </font></font></font></font></font></font></font></font></font></font></li>
                  </ul>
                  <p><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1">Here 
                    is a sample for Oracle.</font> We assume that ORCL is a database 
                    instance running on mydbhost server (port 1521) and a test 
                    (login=test, password=test) account is available. A table 
                    matches to the <a href="sql/upload_oracle.sql">upload_oracle.sql</a> 
                    script. We also assume that we're using the Oracle THIN JDBC 
                    driver.<br>
                    </font></font></font></font></font></font></font></font></p>
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                        <table width="100%" border="0" cellspacing="0" cellpadding="0">
                          <tr> 
                            <td bgcolor="#EEEEEE"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1"><font face="Verdana, Arial, Helvetica, sans-serif" size="-1"><font size="-2"><font face="Verdana, Arial, Helvetica, sans-serif"><font face="Verdana, Arial, Helvetica, sans-serif"><font size="-1">&lt;jsp:useBean 
                              id=&quot;upBean&quot; scope=&quot;application&quot; 
                              class=&quot;javazoom.upload.UploadBean&quot;&gt;<br>
                              &lt;%<br>