java中javamail发送带附件的邮件实例
作者：袖梨
2022-06-29
mail.java 代码
| 代码如下 | 复制代码 |
| package mail; import java.util.* ; import java.io.* ; import javax.mail.* ; import javax.mail.internet.* ; import javax.activation.* ; public class Mail { //定义发件人、收件人、SMTP服务器、用户名、密码、主题、内容等 private String displayName; private String to; private String from; private String smtpServer; private String username; private String password; private String subject; private String content; private boolean ifAuth; //服务器是否要身份认证 private String filename=""; private Vector file = new Vector(); //用于保存发送附件的文件名的集合 /** * 设置SMTP服务器地址 */ public void setSmtpServer(String smtpServer){ this.smtpServer=smtpServer; } /** * 设置发件人的地址 */ public void setFrom(String from){ this.from=from; } /** * 设置显示的名称 */ public void setDisplayName(String displayName){ this.displayName=displayName; } /** * 设置服务器是否需要身份认证 */ public void setIfAuth(boolean ifAuth){ this.ifAuth=ifAuth; } /** * 设置E-mail用户名 */ public void setUserName(String username){ this.username=username; } /** * 设置E-mail密码 */ public void setPassword(String password){ this.password=password; } /** * 设置接收者 */ public void setTo(String to){ this.to=to; } /** * 设置主题 */ public void setSubject(String subject){ this.subject=subject; } /** * 设置主体内容 */ public void setContent(String content){ this.content=content; } /** * 该方法用于收集附件名 */ public void addAttachfile(String fname){ file.addElement(fname); } public Mail(){ } /** * 初始化SMTP服务器地址、发送者E-mail地址、用户名、密码、接收者、主题、内容 */ public Mail(String smtpServer,String from,String displayName,String username,String password,String to,String subject,String content){ this.smtpServer=smtpServer; this.from=from; this.displayName=displayName; this.ifAuth=true; this.username=username; this.password=password; this.to=to; this.subject=subject; this.content=content; } /** * 初始化SMTP服务器地址、发送者E-mail地址、接收者、主题、内容 */ public Mail(String smtpServer,String from,String displayName,String to,String subject,String content){ this.smtpServer=smtpServer; this.from=from; this.displayName=displayName; this.ifAuth=false; this.to=to; this.subject=subject; this.content=content; } /** * 发送邮件 */ public HashMap send(){ HashMap map=new HashMap(); map.put("state", "success"); String message="邮件发送成功！"; Session session=null; Properties props = System.getProperties(); props.put("mail.smtp.host", smtpServer); if(ifAuth){ //服务器需要身份认证 props.put("mail.smtp.auth","true"); SmtpAuth smtpAuth=new SmtpAuth(username,password); session=Session.getDefaultInstance(props, smtpAuth); }else{ props.put("mail.smtp.auth","false"); session=Session.getDefaultInstance(props, null); } session.setDebug(true); Transport trans = null; try { Message msg = new MimeMessage(session); try{ Address from_address = new InternetAddress(from, displayName); msg.setFrom(from_address); }catch(java.io.UnsupportedEncodingException e){ e.printStackTrace(); } InternetAddress[] address={new InternetAddress(to)}; msg.setRecipients(Message.RecipientType.TO,address); msg.setSubject(subject); Multipart mp = new MimeMultipart(); MimeBodyPart mbp = new MimeBodyPart(); mbp.setContent(content.toString(), "text/html;charset=gb2312"); mp.addBodyPart(mbp); if(!file.isEmpty()){//有附件 Enumeration efile=file.elements(); while(efile.hasMoreElements()){ mbp=new MimeBodyPart(); filename=efile.nextElement().toString(); //选择出每一个附件名 FileDataSource fds=new FileDataSource(filename); //得到数据源 mbp.setDataHandler(new DataHandler(fds)); //得到附件本身并至入BodyPart mbp.setFileName(fds.getName()); //得到文件名同样至入BodyPart mp.addBodyPart(mbp); } file.removeAllElements(); } msg.setContent(mp); //Multipart加入到信件 msg.setSentDate(new Date()); //设置信件头的发送日期 //发送信件 msg.saveChanges(); trans = session.getTransport("smtp"); trans.connect(smtpServer, username, password); trans.sendMessage(msg, msg.getAllRecipients()); trans.close(); }catch(AuthenticationFailedException e){ map.put("state", "failed"); message="邮件发送失败！错误原因：＼n"+"身份验证错误!"; e.printStackTrace(); }catch (MessagingException e) { message="邮件发送失败！错误原因：＼n"+e.getMessage(); map.put("state", "failed"); e.printStackTrace(); Exception ex = null; if ((ex = e.getNextException()) != null) { System.out.println(ex.toString()); ex.printStackTrace(); } } //System.out.println("＼n提示信息:"+message); map.put("message", message); return map; } } |
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SmtpAuth.java 代码
| 代码如下 | 复制代码 |
| package mail; public class SmtpAuth extends javax.mail.Authenticator { private String username,password; public SmtpAuth(String username,String password){ this.username = username; this.password = password; } protected javax.mail.PasswordAuthentication getPasswordAuthentication() { return new javax.mail.PasswordAuthentication(username,password); } } |
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存在的问题就是发送到163的邮件全部都带有一个附件的符号，不管有没有发送附件
