Question

注意：回答后添加：谢谢..是的，我曾尝试过Flag.SEEN为true和saveChanges ..我也读过了读取的getContent标记。我尝试在循环消息的for语句中使用它。但是我在下一个循环中再次从文件夹中收到了消息。我假设文件夹是实时的，所以抓住内容，然后从过滤器的文件夹中再次抓取消息，看不到任何看到的应该工作，但我仍然得到相同的消息。我可以尝试关闭文件夹并重新打开作为测试，以查看它是否已标记。此外，如果我转到我的客户端并单击该消息，那么即使在循环中我的代码也会停止查看它，所以我希望在代码中也这样做。

原：我正在使用javamail从gmail帐户获取电子邮件，它工作得很好，当我收到消息时我想将其标记为已阅读，是否有人可以给我一些指示？这是我目前的代码：

    Properties props = System.getProperties();
    props.setProperty("mail.store.protocol", "imaps");
    try {
        Session session = Session.getDefaultInstance(props, null);
        Store store = session.getStore("imaps");

        store.connect("imap.gmail.com", eUserName, ePassWord);
        // Get folder
        Folder folder = store.getFolder("INBOX");
        if (folder == null || !folder.exists()) {
            return null;
        }
        folder.open(Folder.READ_ONLY);

        // Only pull unread
        FlagTerm ft = new FlagTerm(new Flags(Flags.Flag.SEEN), false);
        Message messages[]; // = folder.search(ft);

        for(int x = 0; x < timeOutInSeconds; x++) {
            log.reportMessage("looking for emails");
            try {
                folder.getMessages();
                messages = folder.search(ft);

                if (messages.length > 0) {
                    for (Message message : messages) {
                        //log.reportMessage("found message: should not see again, marking read");
                        // want to mark as read

                    }
                }
                Thread.sleep(1000);
            }
            catch(Exception ex) {

            }
        }

        // Close connection
        folder.close(false);
        store.close();
        return null;

    }
    catch (NoSuchProviderException ex) {

        return null;
    }
    catch (MessagingException ex) {

        return null;
    }


}

Answer 1

首先，如果您使用的是POP3服务器，则无法将邮件标记为已读 - POP3协议不支持该邮件。但是，IMAP v4协议确实如此。

您可能认为这样做的方法是获取消息，将Flags.Flag.SEEN标志设置为true，然后调用message.saveChanges()。奇怪的是，事实并非如此。

相反，JavaMail API设计规范第4章“标志类”部分指出在检索消息内容时隐式设置SEEN标志。因此，要将邮件标记为已读，您可以使用以下代码：

myImapFolder.open(Folder.READ_WRITE);
myImapFolder.getMessage(myMsgID).getContent();
myImapFolder.close(false);

或者另一种方法是使用MimeMessage复制构造函数，即：

MimeMessage source = (MimeMessage) folder.getMessage(1)
MimeMessage copy = new MimeMessage(source);

构造副本时，将为源引用的消息隐式设置seen标志。

Answer 2

在不下载整个邮件的情况下执行此操作的一个班轮：

单条消息：

folder.setFlags(new Message[] {message}, new Flags(Flags.Flag.SEEN), true);

所有消息：

folder.setFlags(messages, new Flags(Flags.Flag.SEEN), true);

Answer 3

这篇文章很老，但最简单的解决方案尚未发布。

您正在访问该消息。 message.setFlag（Flag.SEEN，true）;

Answer 4

您也可以考虑拥有public static int max_message_number，并在阅读邮件后立即在其中存储message[i].getMessageNumber();。然后在阅读任何消息之前，只需检查max_message_number < message[i].getmessageNumber()。如果为true，则不要打印此消息（因为它已被读取）

Answer 5

如果您使用for循环逐个阅读或检查邮件，则代码可以如下将gmail邮件标记为已读：

    Message[] unreadMessages = inbox.search(new FlagTerm(new Flags(Flag.SEEN), false));
            for (int q = 0; q < unreadMessages.length; q++) {

              unreadMessages[q].setFlag(Flag.SEEN, true);

            }

这段代码的作用是让它一个接一个地被读取。

并且文件夹/收件箱也需要是READ_WRITE，而不是READ_ONLY：

folder.open(Folder.READ_WRITE);

Answer 6

message.setFlag（Flag.SEEN，true）给出“找不到符号” message.setFlag（Flags.Flag.SEEN，true）似乎很好。

Answer 7

最简单的方法是设置要读取或写入的文件夹。像这样的意思......

    Folder inbox = null;
    inbox.open(Folder.READ_WRITE);

应该导入Folder类。

Answer 8

folder.open(Folder.READ_ONLY);

和 更改以下行

folder.open(Folder.READ_WRITE);

到此

<强> import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.Statement; public class Test extends JApplet implements ItemListener,ActionListener { private String[] description = { "4.EarthWork", "5.Concrete", "6.ReinforcedConcrete" }; private JTextField t = new JTextField(15); private JComboBox c = new JComboBox(); private JButton view = new JButton("VIEW"); private JButton update = new JButton("UPDATE"); private int count = 0; Container cp; ResultSet rs,rs2,rs3,rs4,con,rcon; Statement st; String msg = ""; String str1,str2; public void init() { try { String database="Proj.accdb"; Connection c=DriverManager.getConnection("jdbc:ucanaccess://W:\\1.Intern Project\\Proj.accdb"); st=c.createStatement(); } catch(Exception e) { System.out.println(e); } for (int i = 0; i < 3; i++) c.addItem(description[count++]); t.setEditable(true); t.setVisible(false); view.addActionListener(this); update.addActionListener(this); c.addItemListener(this); cp = getContentPane(); cp.setLayout(new FlowLayout()); cp.add(t); cp.add(c); cp.add(view); cp.add(update); } public void itemStateChanged(ItemEvent ie) { str2=(String)ie.getItem(); System.out.println(str2); repaint(); } public void actionPerformed(ActionEvent ae) { str1=ae.getActionCommand(); System.out.println(str1); repaint(); } public void paint(Graphics g) { myMethod(g); } public void myMethod(Graphics g) { int y=200; if(str2=="4.EarthWork" && str1=="View") { try { rs = st.executeQuery("select * from items where Itemid=1"); while(rs.next()) { int i11 = rs.getInt("Itemid"); int id = rs.getInt("Id"); String name = rs.getString("IName"); String desc = rs.getString("Description"); String unit = rs.getString("Unit"); int price = rs.getInt("Price"); String s11 = String.valueOf(i11); String s12 = String.valueOf(id); String s13 = String.valueOf(price); if(id==101) { g.drawString(s12,10,y); g.drawString(name,20,y); g.drawString(desc,30,y); try { rs2 = st.executeQuery("select * from sitems where id = 101"); } catch(Exception e) { System.out.println(e); } while(rs2.next()) { y = (y+5); String sname = rs2.getString("SName"); String unt = rs2.getString("Unit"); int p = rs2.getInt("Price"); String sp = String.valueOf(p); g.drawString(sname,30,y); g.drawString(unt,40,y); g.drawString(sp,50,y); } } if(id==102) { y = (y+5); g.drawString(s12,10,y); g.drawString(name,20,y); g.drawString(desc,30,y); try { rs3 = st.executeQuery("select * from sitems where id=102"); } catch(Exception e) { System.out.println(e); } while(rs3.next()) { y = (y+5); String snm = rs3.getString("SName"); String ut = rs3.getString("Unit"); int pp = rs3.getInt("Price"); String spp = String.valueOf(pp); g.drawString(snm,30,y); g.drawString(ut,40,y); g.drawString(spp,50,y); } } if(id==103) { y = (y+5); g.drawString(s12,10,y); g.drawString(name,20,y); g.drawString(desc,30,y); try { rs4 = st.executeQuery("select * from sitems where id=103"); } catch(Exception e) { System.out.println(e); } while(rs4.next()) { y = (y+5); String snm1 = rs4.getString("SName"); String ut1 = rs4.getString("Unit"); int pp1 = rs4.getInt("Price"); String spp1 = String.valueOf(pp1); g.drawString(snm1,30,y); g.drawString(ut1,40,y); g.drawString(spp1,50,y); } } else { y = (y+5); g.drawString(s12,10,y); g.drawString(name,20,y); g.drawString(desc,30,y); g.drawString(unit,40,y); g.drawString(s13,50,y); } } } catch(Exception e) { System.out.println(e); } } if(str2=="5.Concrete" && str1=="View") { try { con = st.executeQuery("select * from items where Itemid=2"); while(con.next()) { y = (y+5); int i111 = con.getInt("Itemid"); int i1dd1 = con.getInt("Id"); String name1 = con.getString("IName"); String desc1 = con.getString("Description"); String unit1 = con.getString("Unit"); int price1 = con.getInt("Price"); String s111 = String.valueOf(i111); String s121 = String.valueOf(i1dd1); String s131 = String.valueOf(price1); g.drawString(s121,10,y); g.drawString(name1,20,y); g.drawString(desc1,30,y); g.drawString(unit1,40,y); g.drawString(s131,50,y); } } catch(Exception e) { System.out.println(e); } } if(str2=="6.ReinforcedConcrete" && str1=="View") { try { rcon = st.executeQuery("select * from items where Itemid=2"); while(rcon.next()) { y = (y+5); int zxc = rcon.getInt("Itemid"); int id56 = rcon.getInt("Id"); String name5 = rcon.getString("IName"); String desc5 = rcon.getString("Description"); String unit5 = rcon.getString("Unit"); int price5 = rcon.getInt("Price"); String s115 = String.valueOf(zxc); String s125 = String.valueOf(id56); String s135 = String.valueOf(price5); g.drawString(s125,10,y); g.drawString(name5,20,y); g.drawString(desc5,30,y); g.drawString(unit5,40,y); g.drawString(s135,50,y); } } catch(Exception e) { System.out.println(e); } } } public static void main(String[] args) { run(new Test(), 800, 600); } public static void run(JApplet applet, int width, int height) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(applet); frame.setSize(width, height); applet.init(); applet.start(); frame.setVisible(true); } }

Answer 9

您也可以尝试

转到gmail设置>转发和POP / IMAP

从使用POP访问邮件时的下拉列表中选择将Gmail的副本标记为已读并保存更改

javamail将gmail消息标记为已读

9 个答案: