Receive emails from gmail with pop3

用Pop3收取gmail的邮件

问题描述:

用pop3收取gmail的邮件  入口参数：  用户名 / 密码  make a thread,每15Check your mailbox every minute,Receive emails from mailboxes,And after decoding, the title will be displayed

After I read the question,灵机一动,马上想到用java.util.TimerTask 和java.util.TimerA class implementation is the most appropriate,Although it is also possible to use threads,But there will be some unnecessary labor;并且TimerTaskClasses also rely on threads to achieve functionality

代码如下:

java 代码

测试类:       import java.util.*;       public class Test{                public static void main(String[] args)throws Exception{                        MailTimerTask task=new MailTimerTask();            Timer mailTimer=new Timer();            mailTimer.schedule(task,2000,15*60*1000);        }    }          import java.util.*;    import java.io.UnsupportedEncodingException;    import java.security.*;    import java.util.Properties;    import javax.mail.*;    import javax.mail.internet.InternetAddress;    import javax.mail.internet.MimeUtility;    import java.lang.RuntimeException;       public class MailTimerTask extends TimerTask{                private static Store store=null;                //Statically initialize the module        //Make sure that there is only one backendStore 连接        static{            try{                        connect("@mailName","@mailPassword");                        }catch(Exception e){                e.printStackTrace();            }        }                        public void run(){            try{                        System.out.println("正在读取邮箱");                        this.printNewMails(this.getNewMails("@mailName","mailPassword"));                        }catch(Exception e){                e.printStackTrace();            }        }                public static void connect(String mailName,String mailPassword)throws Exception{                         Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());             final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";             Properties props = System.getProperties();             props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);             props.setProperty("mail.pop3.socketFactory.fallback", "false");             props.setProperty("mail.pop3.port", "995");             props.setProperty("mail.pop3.socketFactory.port", "995");             Session session = Session.getDefaultInstance(props,null);             URLName urln = new URLName("pop3","pop.gmail.com",995,null, mailName,mailPassword);             store = session.getStore(urln);             store.connect();        }                public Message[] getNewMails(String mailName,String mailPassword)throws Exception{                        //当StoreWhen there is no connection to the instance            if(store.isConnected()){                              connect(mailName,mailPassword);                            }                                                            Folder inbox = store.getFolder("INBOX");                inbox.open(Folder.READ_ONLY);                FetchProfile profile = new FetchProfile();                profile.add(FetchProfile.Item.ENVELOPE);                                //It is assumed that there are unread messages as new messages                if(inbox.getUnreadMessageCount()>0){                                        int fetchCount=inbox.getMessageCount()-inbox.getUnreadMessageCount();                                        if(fetchCount==0){                        return inbox.getMessages();                    }                    Message[] messages = inbox.getMessages(1,2);                                        return messages;                }                else{                                        System.out.println("There are no new messages");                    throw new RuntimeException("There are no new messages");                }                                                   }                public void printNewMails(Message[] msgs)throws Exception{                            for(Message msg:msgs){                                        String text=msg.getSubject();                                    if (text == null)                    System.out.println("This email is untitled");                else if (text.startsWith("=GBK") || text.startsWith("=gb2312"))                   text = MimeUtility.decodeText(text);                else                  text = new String(text.getBytes("gb2312"));                                      System.out.println("--"+text);                                }            }    }