filereadservlet.java

OA典型例子

package com.sure.oa.attachment;

/**
 * <p>Title: OA</p>
 * <p>Description: 项目</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: surec</p>
 * @author mengzy
 * @version 1.0
 */

import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.*;
import java.io.*;
import com.sure.businesslogic.NotFoundException;
import com.sure.dataabstraction.*;

public class filereadServlet  extends javax.servlet.http.HttpServlet{

   protected void doPost(HttpServletRequest req, HttpServletResponse rep) throws ServletException, IOException {
      doGet(req,rep);
   }

  /**
   * 在客户端打开附件
   */
  public void  doGet(HttpServletRequest req, HttpServletResponse rep) throws ServletException,IOException{
      HttpServletRequest request=(HttpServletRequest)req;
      javax.servlet.http.HttpServletResponse response=(HttpServletResponse)rep;
      ServletOutputStream outw=response.getOutputStream();
      try{
         String fileId=request.getParameter("fileId");
         attachment att=attachmentManager.getAttachment(fileId);
         response.setContentType(att.getMimeType());
         response.setHeader("Content-Disposition","attachment;filename=\"" +new String(att.getTitle().getBytes(),"iso-8859-1") + "\"");
         FileInputStream inp = new FileInputStream(getUploadPath() + att.getFilePath());
         int i;
         byte [] buffer = new byte[1024];
         while ( (i = inp.read(buffer)) != -1) {
               outw.write(buffer, 0, i);
         }
         inp.close();
         outw.flush();
      }
      catch (Exception e){
         e.printStackTrace();
      } finally {
         outw.close();
      }
  }

  /**
   * 获得上传路径UploadPath
   */
  public static  String getUploadPath() {
       String retValue="";
       Properties property = null;
       String configFile = "./conf/oc.conf";
       File file = new File(configFile);
       if (!file.exists()) {
           throw new  RuntimeException(configFile + " file not found");
       }
       try {
           property = new Properties();
           property.load(new BufferedInputStream(new FileInputStream(file)));
           retValue = property.getProperty("UploadPath");
       } catch (IOException ex) {
           System.err.println(ex.getMessage());
       }
       finally {
           return  retValue;
       }
   }
}