Class文件如下：

import java.io.*;
import java.sql.*;
import java.util.Date ;
import oracle.sql.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.*;

public class UploadAction extends Action
{
  public ActionForward execute(ActionMapping mapping,
                               ActionForm form,
                               HttpServletRequest request,
                               HttpServletResponse response)
      throws Exception {
    if (form instanceof UploadForm) {
      Date date = new Date();
      System.out.println("-------------File Upload Begins-------------------") ;
      UploadForm theForm = (UploadForm) form;
      file://通过struts的FormFile类来获得上传的文件，前台jsp页面对应的代码
      file://<html:file property="theFile" />
      FormFile file = theForm.getTheFile();
     
      Connection conn = null;
      PreparedStatement ps = null ;

      String union_Id = "" ;
      String union_Version = "" ;
      union_Id = theForm.getUnion_Id() ;
      union_Version = theForm.getUnion_Version() ;
      file://actionpart是数据库表中的字段名，由于表中有多个blob字段，所以用变量来表示其名称
      String actionpart = theForm.getActionpart() ;
      System.out.println("actionpart is:"+actionpart) ;
      file://取得数据库连接，dbPool的源代码附在后面
      dbPool dbp = new dbPool();
      conn = dbp.getConnection() ;

      ResultSet BlobDetails = null;
      Statement stmt = null;

      try {
        InputStream stream = null;
        FileInputStream fstream = null;
        stream = file.getInputStream();
        System.out.println("------------uploadFileSize is : "+stream.available() +"------------") ;

        conn.setAutoCommit(false);
        stmt = conn.createStatement();
        file://先用empty_blob()来初始化该字段
        sql = " update regunion set " + actionpart + "  = empty_blob() where  union_id= " + union_Id +" and  union_Version = "+ union_Version;
        stmt.executeUpdate(sql) ;
        conn.commit() ;
        stmt.close() ;
        stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
        sql = "select " +actionpart + " from regunion where union_id= " + union_Id +" and  union_Version = "+ union_Version + " for  update ";
        BlobDetails = stmt.executeQuery(sql);

        if (BlobDetails.next()) {
          BLOB l_mapBlob = (BLOB)BlobDetails.getBlob(1);
          OutputStream l_blobOutputStream = ((BLOB) l_mapBlob).getBinaryOutputStream();

          byte[] l_buffer = new byte[10* 1024];

          int l_nread = 0;
          while ((l_nread=stream.read(l_buffer)) != -1) // Read from file
            {
            l_blobOutputStream.write(l_buffer,0,l_nread); // Write to Blob
            }

          stream.close();
          l_blobOutputStream.close ();
        }
        BlobDetails.close();
        conn.commit() ;
      }
      catch (FileNotFoundException fnfe) {
        fnfe.printStackTrace() ;
        return mapping.findForward("error");
      }
      catch (IOException ioe) {
        ioe.printStackTrace() ;
        return mapping.findForward("error");;
      }
      catch(SQLException ex){
        ex.printStackTrace() ;
        return mapping.findForward("error");;
      }finally{
        if(conn != null){
          try{
            stmt.close();
            conn.close() ;
          }catch(Exception sqle){
            sqle.printStackTrace() ;
          }
        }
      }

      request.setAttribute("union_Id",union_Id) ;
      request.setAttribute("union_Version",union_Version) ;
      System.out.println("-------------File Upload Ends-------------------") ;
      return mapping.findForward("success");
    }else{
      return null;
    }
  }
}

附：dbPool.java程序

package com.prient.nbsc.unifylaw;
import java.sql.*;
import com.prient.nbsc.common.DBPOOL;
public class dbPool {
  public Connection getConnection(){
    try {
      Connection conn = null;
      Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
      String bridge = "jdbc:oracle:thin:@10.6.89.2:1521:sjk";
      conn = DriverManager.getConnection(bridge,"user","user") ;
      return  conn;
    }
    catch (Exception e) {
      System.out.println(e);
      return null;
       }
  }
}