Java核心代码例程之：JavaMail ----PopMail.java

2019-11-18 15:14:42

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import java.io.*;
import java.util.*;

import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

/**
* Demonstrate POP mail using JavaMail.  Requires mail.jar activation.jar
* Sample run: java -cp .;mail.jar;activation.jar PopMail
**/
public class PopMail
{
   public static void main(String args[]) throws Exception
   {
        String pop3Host="myhost.com", popUser="john", popPassWord="letmein";

        session session = Session.getDefaultInstance(System.getPRoperties(), null);
        Store store = session.getStore("pop3");
        store.connect(pop3Host, -1, popUser, popPassword);


        // Open the default folder
        Folder folder = store.getDefaultFolder();
        if (folder == null)
            throw new NullPointerException("No default mail folder");

        folder = folder.getFolder("INBOX");
        if (folder == null)
            throw new NullPointerException("Unable to get folder: " + folder);

        // Get message count
        folder.open(Folder.READ_WRITE);
        int totalMessages = folder.getMessageCount();
        if (totalMessages == 0)
        {
            System.out.println("No messages found in inbox");
            folder.close(false);

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