JAVA代码发送邮件示例和解释笔记

下载和上传附件、发送短信和发送邮件,都算是程序中很常用的功能,之前记录了文件的上传和下载还有发送短信,由于最近比较忙,邮件发送的功能就没有时间去弄,好在昨晚终于走通代码成功以163邮箱发送邮件到qq邮箱,以下是相关代码,具体解释可以参考代码中注释:


package test;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import com.sun.mail.util.MailSSLSocketFactory;
/* @author tuzongxun123
@Description 邮件发送测试类 /
public class sendMailTest {
public static void main(String[] args) throws Exception {
// 配置信息
Properties pro = new Properties();
pro.put(“mail.smtp.host”, “smtp.163.com”);
pro.put(“mail.smtp.auth”, “true”);
// SSL加密
MailSSLSocketFactory sf = null;
sf = new MailSSLSocketFactory();
// 设置信任所有的主机
sf.setTrustAllHosts(true);
pro.put(“mail.smtp.ssl.enable”, “true”);
pro.put(“mail.smtp.ssl.socketFactory”, sf);
// 根据邮件的会话属性构造一个发送邮件的Session,这里需要注意的是用户名那里不能加后缀,否则便不是用户名了
//还需要注意的是,这里的密码不是正常使用邮箱的登陆密码,而是客户端生成的另一个专门的授权码
MailAuthenticator authenticator = new MailAuthenticator(“tuzongxun123”,
“客户端授权码”);
Session session = Session.getInstance(pro, authenticator);
// 根据Session 构建邮件信息
Message message = new MimeMessage(session);
// 创建邮件发送者地址
Address from = new InternetAddress(“tuzongxun123@163.com”);
// 设置邮件消息的发送者
message.setFrom(from);
// 验证收件人邮箱地址
List toAddressList = new ArrayList<>();
toAddressList.add(“1160569243@qq.com”);
StringBuffer buffer = new StringBuffer();
if (!toAddressList.isEmpty()) {
String regEx = “^([a-z0-9A-Z]+[-|\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\.)+[a-zA-Z]{2,}$”;
Pattern p = Pattern.compile(regEx);
for (int i = 0; i < toAddressList.size(); i++) {
Matcher match = p.matcher(toAddressList.get(i));
if (match.matches()) {
buffer.append(toAddressList.get(i));
if (i < toAddressList.size() - 1) {
buffer.append(“,”);
}
}
}
}
String toAddress = buffer.toString();
if (!toAddress.isEmpty()) {
// 创建邮件的接收者地址
Address[] to = InternetAddress.parse(toAddress);
// 设置邮件接收人地址
message.setRecipients(Message.RecipientType.TO, to);
// 邮件主题
// message.setSubject(“java邮件测试”);
message.setSubject(“为什么错了”);
// 邮件容器
MimeMultipart mimeMultiPart = new MimeMultipart();
// 设置HTML
BodyPart bodyPart = new MimeBodyPart();
// 邮件内容
// String htmlText = “java邮件测试111”;
String htmlText = “为什么错了”;
bodyPart.setContent(htmlText, “text/html;charset=utf-8”);
mimeMultiPart.addBodyPart(bodyPart);
// 添加附件
List fileAddressList = new ArrayList();
fileAddressList
.add(“C:\Users\tuzongxun123\Desktop\新建 Microsoft Office Word 文档.docx”);
if (fileAddressList != null) {
BodyPart attchPart = null;
for (int i = 0; i < fileAddressList.size(); i++) {
if (!fileAddressList.get(i).isEmpty()) {
attchPart = new MimeBodyPart();
// 附件数据源
DataSource source = new FileDataSource(
fileAddressList.get(i));
// 将附件数据源添加到邮件体
attchPart.setDataHandler(new DataHandler(source));
// 设置附件名称为原文件名
attchPart.setFileName(MimeUtility.encodeText(source
.getName()));
mimeMultiPart.addBodyPart(attchPart);
}
}
}
message.setContent(mimeMultiPart);
message.setSentDate(new Date());
// 保存邮件
message.saveChanges();
// 发送邮件
Transport.send(message);
}
}
}
class MailAuthenticator extends Authenticator {
//用户名
private String username;
//密码
private String password;
public MailAuthenticator(String username, String password) {
this.username = username;
this.password = password;
}
public String getPassword() {
return password;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
public String getUsername() {
return username;
}
public void setPassword(String password) {
this.password = password;
}
public void setUsername(String username) {
this.username = username;
}
}

注:我有个同事使用我这个代码更换为他的账号和客户端授权码后,一运行就报错,然后重置了一下邮箱的客户端授权码后,错误便消失了。