参考代码如下：
import javax.mail.*;
import java.util.*;
import java.io.*;
public class ReceiveMail {
//处理任何一种邮件都需要的方法
private void handle(Message msg) throws Exception {
System.out.println("邮件主题:" + msg.getSubject());
System.out.println("邮件作者:" + msg.getFrom()[0].toString());
System.out.println("发送日期:" + msg.getSentDate());
}
//处理文本邮件
private void handleText(Message msg) throws Exception {
this.handle(msg);
System.out.println("邮件内容:"+msg.getContent());
}
//处理Multipart邮件，包括了保存附件的功能
private static void handleMultipart(Message msg) throws Exception {
String disposition;
BodyPart part;
Multipart mp = (Multipart) msg.getContent();
//Miltipart的数量,用于除了多个part,比如多个附件
int mpCount = mp.getCount();
for (int m = 0; m < mpCount; m++) {
this.handle(msg);
part = mp.getBodyPart(m);
disposition = part.getDisposition();
//判断是否有附件
if (disposition != null && disposition.equals(Part.ATTACHMENT))
{
//这个方法负责保存附件
saveAttach(part);
} else {
//不是附件，就只显示文本内容
System.out.println(part.getContent());
}
}
}
private static void saveAttach(BodyPart part) throws Exception {
//得到未经处理的附件名字
String temp = part.getFileName();
//除去发送邮件时，对中文附件名编码的头和尾，得到正确的附件名
//（请参考发送邮件程序SendMail的附件名编码部分）
String s = temp.substring(8, temp.indexOf("?="));
//文件名经过了base64编码,下面是解码
String fileName = base64Decoder(s);
System.out.println("有附件:" + fileName);
InputStream in = part.getInputStream();
FileOutputStream writer = new FileOutputStream(new File(
"保存附件的本地路径"+ "\\"+fileName));
byte[] content = new byte[255];
int read = 0;
while ((read = in.read(content)) != -1) {
writer.write(content);
}
writer.close();
in.close();
}
//base64解码
private static String base64Decoder(String s) throws Exception {
sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
byte[] b = decoder.decodeBuffer(s);
return (new String(b));
}
public static void receive(String receiverMailBoxAddress, String username,String password) {
//本人用的是yahoo邮箱，故接受邮件使用yahoo的pop3邮件服务器
String host = "pop.mail.yahoo.com.cn";
try {
//连接到邮件服务器并获得邮件
Properties prop = new Properties();
prop.put("mail.pop3.host", host);
Session session = Session.getDefaultInstance(prop);
Store store = session.getStore("pop3");
store.connect(host, username, password);
Folder inbox = store.getDefaultFolder().getFolder("INBOX");
//设置inbox对象属性为可读写，这样可以控制在读完邮件后直接删除该附件
inbox.open(Folder.READ_WRITE);
Message[] msg = inbox.getMessages();
FetchProfile profile = new FetchProfile();
profile.add(FetchProfile.Item.ENVELOPE);
inbox.fetch(msg, profile);
for (int i = 0; i < msg.length; i++) {
//标记此邮件的flag标志对象的DELETED位为true,可以在读完邮件后直接删除该附件，具体执行时间是在调用
//inbox.close()方法的时候
msg[i].setFlag(Flags.Flag.DELETED, true);
handleMultipart(msg[i]);
System.out.println("****************************");
}
if (inbox != null) {
//参数为true表明阅读完此邮件后将其删除，更多的属性请参考mail.jar的API
inbox.close(true);
}
if (store != null) {
store.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
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