javamail通过pop3收信，附件下载，我的办法（代码！）-JSP教程,邮件相关

从附件名连接到这个servlet!

downloadservlet.java

package mailservlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import javax.activation.*;
import javax.mail.*;
import javax.mail.internet.*;
/**
* <p>title: </p>
* <p>description: </p>
* <p>copyright: copyright (c) 2002</p>
* <p>company: socix</p>
* @author simon
* @version 1.0
*/

public class downloadservlet extends httpservlet
{
    public void service(httpservletrequest request, httpservletresponse response)
        throws ioexception, servletexception
    {
    httpsession session = request.getsession();
    string contenttype = request.getparameter("contenttype");       //附件的contenttype
    int count = integer.parseint(request.getparameter("count"));    //第几个bodypart
    object body = session.getattribute("body");                     //邮件的mimemultipart
    if(body != null)
    {
system.out.println("download start!");
        try
        {
            mimemultipart mp        = (mimemultipart)body;
            int i                   = mp.getcount();
            bodypart part           = mp.getbodypart(count);
            contenttype             = part.getcontenttype();
            string filename         = part.getfilename();
            response.setcontenttype(contenttype);
            response.setheader("content-disposition","attachment; filename=" + filename);
system.out.println("download start!" + part.getsize());
                inputstream is          = part.getinputstream();
            servletoutputstream out = response.getoutputstream();
            bufferedinputstream buf = new bufferedinputstream(is);
            byte[] data             = new byte[2048];
            int readed              = buf.read(data);
            while (readed != -1)
            {
                    out.write(data,0,readed);
                    readed = buf.read(data);
            }
            out.flush();
            out.close();
            buf.close();
system.out.println("download over !");
        }
        catch (exception ex)
        {
        system.out.println("error : " + ex);
        }
    }
    }
}