java简单电子邮件客户端

package com.hz.mail; import java.awt.Color; import java.awt.EventQueue; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Properties; import javax.mail.BodyPart; import javax.mail.Folder; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Multipart; import javax.mail.Part; import javax.mail.Session; import javax.mail.Store; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; import javax.mail.internet.MimeUtility; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.UIManager; import com.sun.mail.handlers.multipart_mixed; /** * @author 作者 是hz啊: * @version 创建时间：2020年5月24日下午2:17:32 类说明 */ public class StoreMail extends JFrame { private static final long serialVersionUID = 1L; private static JTextArea ta_text; public final static String MAIL_SERVER_HOST = "pop.qq.com"; // 邮箱服务器 public final static String TYPE_HTML = "text/html;charset=UTF-8"; // 文本内容类型 public final static String MAIL_FROM = "[email protected]"; // 发件人 public final static String MAIL_TO = "[email protected]"; // 收件人 public StoreMail() { // TODO Auto-generated constructor stub setTitle("wemail"); getContentPane().setLayout(null); // 设置布局为空布局 setBounds(500, 500, 500, 600); setLocationRelativeTo(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JLabel lab = new JLabel(); lab.setForeground(new Color(100, 149, 237)); lab.setFont(new Font("", Font.ROMAN_BASELINE, 24)); lab.setText("微邮箱"); lab.setBounds(200, 10, 230, 24); getContentPane().add(lab); final JLabel label2 = new JLabel(); label2.setText("接收邮件："); label2.setBounds(22, 85, 66, 18); getContentPane().add(label2); final JScrollPane scrollPane = new JScrollPane(); scrollPane.setBounds(113, 85, 287, 360); getContentPane().add(scrollPane); ta_text = new JTextArea(); // 创建一个视口并设置其视图 scrollPane.setViewportView(ta_text); ta_text.setLineWrap(true); // 激活自动换行功能 ta_text.setWrapStyleWord(true); // 激活断行不断字功能 final JButton btn = new JButton("确 定"); btn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub try { recievemessage(); } catch (Exception e1) { e1.printStackTrace(); } } }); btn.setBounds(100, 480, 85, 28); getContentPane().add(btn); final JButton btn_back = new JButton(); btn_back.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub setVisible(false); new Menu(); } }); btn_back.setText("返 回"); btn_back.setBounds(200, 480, 85, 28); getContentPane().add(btn_back); final JButton btn_exit = new JButton(); btn_exit.addActionListener(new ActionListener() { public void actionPerformed(final ActionEvent e) { System.exit(0); } }); btn_exit.setText("退 出"); btn_exit.setBounds(300, 480, 85, 28); getContentPane().add(btn_exit); setVisible(true); } public void recievemessage() throws Exception { String username = Login.tf_user.getText(); String password = new String(Login.tf_password.getPassword()); // 创建一个有具体连接信息的Properties对象 Properties prop = new Properties(); prop.setProperty("mail.debug", "true"); prop.setProperty("mail.store.protocol", "pop3"); prop.setProperty("mail.pop.host", MAIL_SERVER_HOST); Session session = Session.getInstance(prop); Store store = session.getStore(); store.connect(MAIL_SERVER_HOST, username, password); // 获得邮箱内的邮件夹 Folder folder = store.getFolder("inbox"); folder.open(Folder.READ_ONLY); // 获得邮件夹Folder内的所有邮件Message对象 Message[] messages = folder.getMessages(); ta_text.append("一共收到" + messages.length + "封邮件\n"); for (int i = 0; i < messages.length; i++) { MimeMessage msg = (MimeMessage) messages[i]; ta_text.append("第 " + (i + 1) + "封邮件\n"); String subject = msg.getSubject(); String from = (msg.getFrom()[0]).toString(); ta_text.append("主题：" + subject + "\n"); ta_text.append("发件人地址：" + from + "\n"); ta_text.append("发件时间：" + getSentDate(msg, null) + "\n"); if (isContainAttachment(null)) { System.out.println("包含附件\n" ); } //String content = messages[i].getContent().toString(); StringBuffer content = new StringBuffer(30); getMailTextContent(msg, content); ta_text.append("邮件的内容：" + content + "\n"); Multipart mp = (Multipart) messages[i].getContent(); for (int j = 0; j < mp.getCount(); j++) { BodyPart bp = mp.getBodyPart(j); if (bp.getDisposition() != null) { String fileName = bp.getFileName(); if (fileName.startsWith("=?")) { fileName = MimeUtility.decodeText(fileName); // 需要解析中文名称的文件名(将中文名称加入邮件时用encodeText)   } ta_text.append("附件：" + fileName); } } ta_text.append("\n"); System.out.println("第 " + (i + 1) + "封邮件的主题：" + subject); // System.out.println("第 " + (i + 1) + "封邮件的发件人地址：" + from); // System.out.println("第 " + (i + 1) + "封邮件的内容：" + content); } JOptionPane.showMessageDialog(null, "邮件查询成功！"); // 5、关闭 folder.close(false); store.close(); } /** * 获取邮件文本内容 */ public static void getMailTextContent(Part part, StringBuffer content) throws MessagingException, IOException { //通过getContent 方法获取文本类型的附件 boolean isContainTextAttach = part.getContentType().indexOf("name") > 0; if (part.isMimeType("text/*") && !isContainTextAttach) { content.append(part.getContent().toString()); } else if (part.isMimeType("message/rfc822")) { getMailTextContent((Part)part.getContent(),content); } else if (part.isMimeType("multipart/*")) { Multipart multipart = (Multipart) part.getContent(); int partCount = multipart.getCount(); for (int i = 0; i < partCount; i++) { BodyPart bodyPart = multipart.getBodyPart(i); getMailTextContent(bodyPart,content); } } } /** * 获得邮件发送时间 * @param msg 邮件内容 * @return yyyy年mm月dd日 星期X HH:mm * @throws MessagingException */ public static String getSentDate(MimeMessage msg, String pattern) throws MessagingException { Date receivedDate = msg.getSentDate(); if (receivedDate == null) return ""; if (pattern == null || "".equals(pattern)) pattern = "yyyy年MM月dd日 E HH:mm "; return new SimpleDateFormat(pattern).format(receivedDate); } /** * 判断邮件中是否包含附件 * @param msg 邮件内容 * @return 邮件中存在附件返回true，不存在返回false * @throws MessagingException * @throws IOException */ public static boolean isContainAttachment(Part part) throws MessagingException, IOException { boolean flag = false; if (part.isMimeType("multipart/*")) { MimeMultipart multipart = (MimeMultipart) part.getContent(); int partCount = multipart.getCount(); for (int i = 0; i < partCount; i++) { BodyPart bodyPart = multipart.getBody