package com.adm.ctl;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.adm.dao.CommonDao;
/**
* Servlet implementation class DlCtl
*/
public class DlCtl extends HttpServlet {
private static final long serialVersionUID = 1L;
private String upload_dir = null;
private CommonDao dao = null;
public void init(ServletConfig config) throws ServletException {
this.dao = (CommonDao)new ClassPathXmlApplicationContext("beans.xml").getBean("dao");
this.upload_dir = config.getServletContext().getRealPath("/")+"upload";
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
String guid = request.getParameter("guid");
Map<String,String> fileMap = this.dao.query("usr_upload",new String[]{"filename","title"},"guid = '"+guid+"'").getData();
System.out.println(upload_dir+File.separator+fileMap.get("filename"));
File file = new File(upload_dir+File.separator+fileMap.get("filename"));
// 取得文件名。
String title = fileMap.get("title");
// 以流的形式下载文件。
InputStream fis = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
// 清空response
response.reset();
// 设置response的Header
response.addHeader("Content-Disposition", "attachment;filename=" + new String(title.getBytes("utf-8"),"ISO-8859-1"));
response.addHeader("Content-Length", "" + file.length());
OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
response.setContentType("application/octet-stream");
toClient.write(buffer);
toClient.flush();
toClient.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}
}