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用JAVA实现ORACLE的文件上传,下载


  文件上传使用:http://www.javazoom.net 的 UploadBeanJAVA包,他的文件上传做的还不错,可进行目录或数据库的文件上传,默认使用的是ORACLE 的LONGRAW子段类型,可使用BLOB类型,但需要使用扩展JAVA包,LONGRAW子段最大长度为2GB,并且一个表内只允许出现一个LONGRAW型子段,不过已经够我用了,而BLOB型子段最大为4GB,而且没有表中出现次数的限制。备注:想用他下载的组件Download4J 1.0,我劝还是别做梦了,在功能上不太适合用在数据库下载。
  
  文件下载使用的是:http://www.jspsmart.com的SmartUpload JAVA包,该包即可以文件上传,也可以文件下在,而且使用也比较方便,不过我在这里只使用文件从数据库下载功能,有兴趣的朋友可以试试。
  
  下面我把使用这两个包的源CODE给大家说一下,以后大家碰道这些问题就不用象我一样发愁了,哎!多伟大的人呀!大家给点掌声安慰我这个受伤的孤独男人吧!
  
  文件上传:
  
  实际上这些JAVA包都有使用的例子,不过我还是要贴出来。 
  
  文件名:ChineseDatabaseUpload.jsp
  
  文件内容:
  <html>
  <%@ page language="java" contentType="text/html; charset=gb2312" import="jav
  azoom.upload.*,java.util.*" %>
  <%@ page errorPage="ExceptionHandler.jsp" %>
  <jsp:useBean id="upBean" scope="application" class="javazoom.upload.UploadBe
  an" >
  <%
  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); //数据库连接
  %>
  </jsp:useBean>
  <head>
  <title>中文上传</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,nul
  l,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(表格栏): uploadfile"+"<BR> Uploaded file(已上传的
  文件名称): "+file.getFileName()+" ("+file.getFileSize()+" bytes)"+"<BR> Cont
  ent Type(文件类别)"+file.getContentType());
  //out.println("<li>Form field: uploadfile"+"<BR> Uploaded file: "+file.getFi
  leName()+" ("+file.getFileSize()+" bytes)"+"<BR> Content Type"+file.getConte
  ntType());
  // 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(简体) = "+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="cente
  r">
  <tr>
  <td align="left"><font size="-1" face="Verdana, Arial, Helvetica, sans
  -serif"><b>请选择上传文件:</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="上传">
  <input type="reset" name="Reset" value="取消">
  </font></td>
  </tr>
  </table>
  <br>
  <br>
  <table width="90%" border="0" cellspacing="1" cellpadding="0" align="cente
  r">
  <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, Helv
  etica, sans-serif"><b><font color="#0000FF"> Needed
  HTML tags :</font></b></font></td>
  </tr>
  <tr>
  <td bgcolor="#FFFFFF"><font size="-1" face="Verdana, Arial, Helv
  etica, sans-serif"> <<b>form</b>
  <b>method</b>="<b><font color="#FF0000">post</font></b>"
  <b>action</b>="<b><font color="#FF0000">ChineseUpload.jsp</fon
  t></b>"
  name="upload" <b>enctype</b>="<b><font color="#FF0000">multipa
  rt/form-data</font></b>"></font></td>
  </tr>
  <tr>
  <td bgcolor="#FFFFFF"><font size="-1" face="Verdana, Arial, Helv
  etica, 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>
  
  该ORACLE的表结构,在该网站上找吧!很简单就三个子段而已。
  
  文件下载:
  
  文件名:jspsmartdownload.jsp
  
  文件内容:
  
  <meta http-equiv="Content-Type" content="application/msword; charset=gb2312"
  
  > //注意这里,如果你没有设置成“GB2312”结果你会明白的。
  
  <%@ page language="java" import="java.sql.*,com.jspsmart.upload.*"%>
  <jsp:useBean id="mySmartUpload" scope="page" class="com.jspsmart.upload.Smar
  tUpload" />
  <%
  Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
  Connection con = DriverManager.getConnection("jdbc:oracle:thin10.231.234.2
  52:1521: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();
  %>
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