关于java开发邮件接收程序的一点总结

 用java开发邮件接收程序需要用到javamail包，资源地址：http://java.sun.com/products/javamail/，最新版是 JavaMail 1.4.3 ，下载地址是：http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/javamail-1.4.3.zip?BundledLineItemUUID=gqFIBe.oRjUAAAEl1r4xay_N&OrderID=t1BIBe.o3q4AAAElxL4xay_N&ProductID=J3tIBe.pJGsAAAElR5Jh6wjK&FileName=/javamail-1.4.3.zip。
里面有两个关键的jar包，分别是mail.jar和activation.jar，一定要放在java目录\jre\lib\ext目录里面，否则会在编译时报错，错误信息如下：
ReceiveMail.java:10: package javax.mail does not exist
import javax.mail.*;
^
ReceiveMail.java:11: package javax.mail.internet does not exist
import javax.mail.internet.*;
下面贴出来一个例子代码，供参考（当然你也可以网上查到）
// java 收邮件程序
import java.io.*;   
import java.text.*;   
import java.util.*;   
import javax.mail.*;   
import javax.mail.internet.*;   
  
/**  
* 有一封邮件就需要建立一个ReciveMail对象  
*/  
public class ReceiveMailDemo {   
    private MimeMessage mimeMessage = null;   
    private String saveAttachPath = ""; //附件下载后的存放目录   
    private StringBuffer bodytext = new StringBuffer();//存放邮件内容   
    private String dateformat = "yy-MM-dd HH:mm"; //默认的日前显示格式   
  
    public ReceiveMailDemo(MimeMessage mimeMessage) {   
        this.mimeMessage = mimeMessage;   
    }   
  
    public void setMimeMessage(MimeMessage mimeMessage) {   
        this.mimeMessage = mimeMessage;   
&n