JavaMail的POP3邮件客户端错误

Question

我是一个Java邮件客户端上的工作：

import javax.mail.*; 
import javax.mail.internet.*; 
import java.util.*; 

public class MailClient { 
    public static void main(String[] args) { 
     try { 
      Properties props = new Properties(); 
      Session session; 

      URLName url = new URLName("pop3","pop.gmail.com",995,"","email@gmail.com","password"); 
      session = Session.getInstance(props, null); 
      Store store = new POP3SSLStore(session,url); 
      store.connect(); 

      Folder folder = store.getFolder("INBOX"); 
      folder.open(Folder.READ_ONLY); 

      Message message[] = folder.getMessages(); 

      for (int i=0, n = message.length; i<n; i++) { 
       System.out.println(message[i].getSubject()); 
      } 
      folder.close(false); 
      store.close(); 
     } 
     catch (MessagingException e) { 
      System.out.println("Error: " + e); 
     } 
    } 
} 

的错误发生是这样的：

MailClient.java:13: error: cannot find symbol 
Store store = new POP3SSLStore(session,url); 
symbol: class POP3SSLStore 
location: class MailClient 
1 error 

Answer 1

你缺少一个导入：

import com.sun.mail.pop3.POP3SSLStore; 

之后，它应该编译

Answer 2

你s不应该自己实例化Store对象。让会议为你做。调用session.getStore（“pop3s”）。请参阅JavaMail download bundle附带的示例代码，以及JavaMail FAQ中的示例，尤其是Gmail example。