Java GUI 实现发送邮件以及附件
📅 2021-03-05 11:27
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实现代码：
注意点：
- 需要的jar包：JavaMail API 和Java Activation Framework (JAF) ，下载可参考菜鸟教程
- 默认使用QQ邮箱发送，需要设置授权，设置-->账户->POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务
- 发件人代码中已设置，只需提供收件人邮箱
import com.sun.mail.util.MailSSLSocketFactory;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.io.File;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Properties;
/**
* @author xiaoming
* @create 2021-03-04 9:52
*/
public class Email {
public static void main(String[] args) {
JFrame jFrame = new JFrame("Send Email");
jFrame.setBounds(500, 200, 600, 700);
// 设置窗口不可拉伸
jFrame.setResizable(false);
jFrame.add(new SendPanel(jFrame));
jFrame.setVisible(true);
// 设置窗口关闭
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
}
class SendPanel extends JPanel {
private String EmailTo;
private String Subject;
private String Text;
private String FileName;
JFrame jFrame;
public SendPanel(JFrame jFrame) {
this.jFrame=jFrame;
setBounds(0, 0, 600, 700);
JLabel jLabelTo = new JLabel("收件人");
jLabelTo.setLocation(100, 70);
jLabelTo.setSize(50, 50)
JTextField jTextFieldTo = new JTextField(1);
jTextFieldTo.setLocation(150, 80);
jTextFieldTo.setSize(300, 30);
jTextFieldTo.setToolTipText("请输入QQ邮箱地址");
jTextFieldTo.setText("请输入QQ邮箱地址");
jTextFieldTo.setBackground(new Color(204, 204, 204));
// 设置焦点监听
jTextFieldTo.addFocusListener(new FocusListener(){
@Override
public void focusGained(FocusEvent e) {
if ("请输入QQ邮箱地址".equals(jTextFieldTo.getText())){
jTextFieldTo.setText("");
jTextFieldTo.setBackground(Color.white);
}
}
@Override
public void focusLost(FocusEvent e) {
if (jTextFieldTo.getText().length()<1){
jTextFieldTo.setText("请输入QQ邮箱地址");
jTextFieldTo.setBackground(new Color(204, 204, 204));
}else {
EmailTo=jTextFieldTo.getText();
String regex="[1-9][0-9]{8,10}\\@[q][q]\\.[c][o][m]";
if (!EmailTo.matches(regex)){
JOptionPane.showMessageDialog(jTextFieldTo,"输入邮箱错误，请输入QQ邮箱","提示",JOptionPane.ERROR_MESSAGE);
}
System.out.println(EmailTo);
}
}
});
JLabel jLabelSubject = new JLabel("主题");
jLabelSubject.setLocation(110,150);
jLabelSubject.setSize(50,50);
JTextField jTextFieldSubject = new JTextField(1);
jTextFieldSubject.setLocation(150, 160);
jTextFieldSubject.setSize(300, 30);
jTextFieldSubject.setToolTipText("请输入邮件主题");
jTextFieldSubject.setText("请输入邮件主题");
jTextFieldSubject.setBackground(new Color(204, 204, 204));
// 设置焦点监听
jTextFieldSubject.addFocusListener(new FocusListener(){
@Override
public void focusGained(FocusEvent e) {
if ("请输入邮件主题".equals(jTextFieldSubject.getText())){
jTextFieldSubject.setText("");
jTextFieldSubject.setBackground(Color.white);
}
}
@Override
public void focusLost(FocusEvent e) {
if (jTextFieldSubject.getText().length()<1){
jTextFieldSubject.setText("请输入邮件主题");
jTextFieldSubject.setBackground(new Color(204, 204, 204));
}else {
Subject=jTextFieldSubject.getText();
System.out.println(Subject);
}
}
});
JLabel jLabelText = new JLabel("正文");
jLabelText.setSize(50,50);
jLabelText.setLocation(110,250);
JTextArea jTextAreaText= new JTextArea();
jTextAreaText.setSize(300,300);
jTextAreaText.setLocation(150,250);
jTextAreaText.addFocusListener(new FocusListener() {
@Override
public void focusGained(FocusEvent e) {
}
@Override
public void focusLost(FocusEvent e) {
if (jTextAreaText.getText().length()<1 && jTextFieldTo.getText().length()>1 && jLabelSubject.getText().length()>1){
JOptionPane.showMessageDialog(jTextAreaText,"输入内容为空","提示",JOptionPane.INFORMATION_MESSAGE);
} else {
Text=jTextAreaText.getText();
}
}
});
JButton jButton=new JButton("发送");
jButton.setSize(200,50);
jButton.setLocation(390,600);
jButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
if ("请输入QQ邮箱地址".equals(jTextFieldTo.getText())){
JOptionPane.showMessageDialog(jButton,"无收件人","提示",JOptionPane.ERROR_MESSAGE);
}
boolean state=SendMessageState(EmailTo,Subject,Text,FileName);
if(state){
JOptionPane.showMessageDialog(jButton,"发送成功","提示",JOptionPane.INFORMATION_MESSAGE);
} else {
JOptionPane.showMessageDialog(jButton,"发送失败","提示",JOptionPane.ERROR_MESSAGE);
}
} catch (GeneralSecurityException generalSecurityException) {
generalSecurityException.printStackTrace();
}
}
});
JButton jButtonSelectFile=new JButton("选择");
jButtonSelectFile.setSize(200,50);
jButtonSelectFile.setLocation(10,600);
jButtonSelectFile.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JFileChooser chooser = new JFileChooser();
//设置选择目录
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
int reg = chooser.showOpenDialog(null);
if(reg == JFileChooser.APPROVE_OPTION)
{
//获得选择到的文件
File file = chooser.getSelectedFile();
try {
FileName=file.getCanonicalPath();
} catch (IOException ioException) {
ioException.printStackTrace();
}
System.out.println(FileName);
}
}
});
setLayout(null);
add(jLabelTo);
add(jTextFieldTo);
add(jLabelSubject);
add(jTextFieldSubject);
add(jLabelText);
add(jTextAreaText);
add(jButton);
add(jButtonSelectFile);
}
public static Boolean SendMessageState(String to,String subject,String text,String fileName) throws GeneralSecurityException {
boolean state=false;
// 收件人邮箱
String TO=to;
// 发件人邮箱
String from="*********@qq.com";
// 发送邮件的主机
String host="smtp.qq.com";
// 获取系统的属性
Properties properties=System.getProperties();
// 设置邮件服务器
properties.setProperty("mail.smtp.host",host);
// 需要验证用户名密码
properties.put("mail.smtp.auth",true);
// QQ邮箱使用SSL加密
MailSSLSocketFactory mailSSLSocketFactory = new MailSSLSocketFactory();
mailSSLSocketFactory.setTrustAllHosts(true);
properties.put("mail.smtp.ssl.enable",true);
properties.put("mail.smtp.ssl.socketFactory",mailSSLSocketFactory);
Session session = Session.getDefaultInstance(properties, new Authenticator() {
@Override
protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("2649144933@qq.com","vfaeejtwfrapecih") ;
}
});
MimeMessage mimeMessage=new MimeMessage(session);
try {
// 发送方
mimeMessage.setFrom(new InternetAddress(from));
// 接受方
mimeMessage.addRecipient(MimeMessage.RecipientType.TO, new InternetAddress(TO));
// 邮件的标题/主题
mimeMessage.setSubject(subject);
//创建消息部分
MimeBodyPart MessagePart = new MimeBodyPart();
//添加正文
MessagePart.setText(text);
// 创建多重消息
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(MessagePart);
if (fileName!=null){
// 截取路径后面的文件名称
String name= fileName.substring(fileName.lastIndexOf("\\")+1);
System.out.println(name);
MessagePart=new MimeBodyPart();
FileDataSource fileDataSource = new FileDataSource(fileName);
MessagePart.setDataHandler(new DataHandler(fileDataSource));
MessagePart.setFileName(name);
multipart.addBodyPart(MessagePart);
}
// 发送完整消息
mimeMessage.setContent(multipart);
// 发送信息
Transport.send(mimeMessage);
state= true;
} catch (MessagingException e) {
e.printStackTrace();
}
System.out.println(state);
return state;
}
}
使用界面：
使用效果：
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