java 发送邮件
程序员文章站
2022-07-13 16:09:52
...
之前没弄过java程序发送邮件的功能,因为公司要求所以弄了下,不过还是遇到很多问题,比如下面这个异常,应该是说域名错误,如果遇到这种问题的话,可将smtp改成mail就解决了我的问题!!
javax.mail.SendFailedException: Sending failed; nested exception is: class javax.mail.MessagingException: Unknown SMTP host: smtp.dgnetcop.com;
下面把java发送邮件的代码贴出来
/** * */ package javaMail; import java.util.Date; import java.util.Enumeration; import java.util.Properties; import java.util.Vector; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Authenticator; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Multipart; 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 javax.mail.internet.MimeUtility; /** * @author zj * */ public class SendMail { String to = "";// 收件人 String from = "";// 发件人 String host = "";// smtp主机 String username = ""; String password = ""; String filename = "";// 附件文件名 String subject = "";// 邮件主题 String content = "";// 邮件正文 Vector file = new Vector();// 附件文件集合 /** * <br> * 方法说明:默认构造器 <br> * 输入参数: <br> * 返回类型: */ public SendMail() { } /** * <br> * 方法说明:构造器,提供直接的参数传入 <br> * 输入参数: <br> * 返回类型: */ public SendMail(String to, String from, String smtpServer, String username, String password, String subject, String content) { this.to = to; this.from = from; this.host = smtpServer; this.username = username; this.password = password; this.subject = subject; this.content = content; } /** * <br> * 方法说明:设置邮件服务器地址 <br> * 输入参数:String host 邮件服务器地址名称 <br> * 返回类型: */ public void setHost(String host) { this.host = host; } /** * <br> * 方法说明:设置登录服务器校验密码 <br> * 输入参数: <br> * 返回类型: */ public void setPassWord(String pwd) { this.password = pwd; } /** * <br> * 方法说明:设置登录服务器校验用户 <br> * 输入参数: <br> * 返回类型: */ public void setUserName(String usn) { this.username = usn; } /** * <br> * 方法说明:设置邮件发送目的邮箱 <br> * 输入参数: <br> * 返回类型: */ public void setTo(String to) { this.to = to; } /** * <br> * 方法说明:设置邮件发送源邮箱 <br> * 输入参数: <br> * 返回类型: */ public void setFrom(String from) { this.from = from; } /** * <br> * 方法说明:设置邮件主题 <br> * 输入参数: <br> * 返回类型: */ public void setSubject(String subject) { this.subject = subject; } /** * <br> * 方法说明:设置邮件内容 <br> * 输入参数: <br> * 返回类型: */ public void setContent(String content) { this.content = content; } /** * <br> * 方法说明:把主题转换为中文 <br> * 输入参数:String strText <br> * 返回类型: */ public String transferChinese(String strText) { try { strText = MimeUtility.encodeText(new String(strText.getBytes(), "GB2312"), "GB2312", "B"); } catch (Exception e) { e.printStackTrace(); } return strText; } /** * <br> * 方法说明:往附件组合中添加附件 <br> * 输入参数: <br> * 返回类型: */ public void attachfile(String fname) { file.addElement(fname); } /** * <br> * 方法说明:发送邮件 <br> * 输入参数: <br> * 返回类型:boolean 成功为true,反之为false */ public boolean sendMail() { // 构造mail session Properties props = System.getProperties(); props.put("mail.smtp.host", host); props.put("mail.smtp.auth", "true"); Session session = Session.getDefaultInstance(props, new Authenticator() { public PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(username, password); } }); try { // 构造MimeMessage 并设定基本的值 MimeMessage msg = new MimeMessage(session); msg.setFrom(new InternetAddress(from)); InternetAddress[] address = { new InternetAddress(to) }; msg.setRecipients(Message.RecipientType.TO, address); subject = transferChinese(subject); msg.setSubject(subject); // 构造Multipart Multipart mp = new MimeMultipart(); // 向Multipart添加正文 MimeBodyPart mbpContent = new MimeBodyPart(); mbpContent.setText(content); // 向MimeMessage添加(Multipart代表正文) mp.addBodyPart(mbpContent); // 向Multipart添加附件 Enumeration efile = file.elements(); while (efile.hasMoreElements()) { MimeBodyPart mbpFile = new MimeBodyPart(); filename = efile.nextElement().toString(); FileDataSource fds = new FileDataSource(filename); mbpFile.setDataHandler(new DataHandler(fds)); mbpFile.setFileName(fds.getName()); // 向MimeMessage添加(Multipart代表附件) mp.addBodyPart(mbpFile); } file.removeAllElements(); // 向Multipart添加MimeMessage msg.setContent(mp); msg.setSentDate(new Date()); // 发送邮件 Transport.send(msg); } catch (MessagingException mex) { mex.printStackTrace(); Exception ex = null; if ((ex = mex.getNextException()) != null) { ex.printStackTrace(); } return false; } return true; } /** * <br> * 方法说明:主方法,用于测试 <br> * 输入参数: <br> * 返回类型: */ public static void main(String[] args) { SendMail sendmail = new SendMail(); sendmail.setHost("smtp.dgnetcop.com");//发送邮件的域名,这里如果报上面的错误,可将smtp改成mail sendmail.setUserName("uuu");//你的用户名 sendmail.setPassWord("ppp");//你的密码 sendmail.setTo("xxx.com"); //发送给哪个地址 sendmail.setFrom("yyy.com");//你的邮箱 sendmail.setSubject("你好,这是一个测试"); sendmail.setContent("你好,这是一个测试!"); //sendmail.attachfile("d:\\test.html");//附件物理地址 sendmail.sendMail(); System.out.println("成功!"); } }
上一篇: 存入mysql的特殊字符变?号
下一篇: 让java程序只运行一个实例