新建一个工具类:
Mail.java
该类的主要关键点是:1、设置系统属性。也就是你是用什么协议来进行邮件发送的,邮件协议有很多在种,比如impt,smpt,prop等协议,
我现在测试用的是smpt协议,smpt协议里也分为很多种,以为有不同的邮箱QQ,126,新浪等,所以就有不同的smpt系统属性了(注:这些
都可以再网上查到),我用的协议是smpt.qq.com,通过property将它存到map集合里面:props.put("host","smpt.qq.com")
2、准备获取邮件回话对象,通过mail.jar包中Session.getDefaultInstance()来获取回话。
3、准备创建MIME邮件对象,jar包自带的MimeMessage(session)方法
4、设置smtp身份认证:props.put("mail.smtp.auth", "true");
5、定义邮件主题:mimeMsg.setSubject(mailSubject);6、
6、定义邮件内容:bp.setContent("" + mailBody, "text/html;charset=GBK");
7、设置发信人:mimeMsg.setFrom(new InternetAddress(from));
8、定义收信人:mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
9、定义抄送人:mimeMsg.setRecipients(Message.RecipientType.CC, (Address[]) InternetAddress .parse(copyto));
以下是源码:
package com.util; import java.util.Properties; import javax.mail.Address; import javax.mail.BodyPart; import javax.mail.Message; import javax.mail.Multipart; 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; public class Mail { private MimeMessage mimeMsg; private Session session; private Properties props; private Multipart mp; private static String smtp = "smtp.qq.com";// smtp服务器 private static String from = "1558168146@qq.com";// 邮件显示名称 private static String copyto = "";// 抄送人邮件地址 private static String subject = "找回密码";// 邮件标题 private static String username = "1558168146";// 发件人真实的账户名 private static String password = "13250394wuchunyu";// 发件人密码 public Mail(String smtp) { setSmtpHost(smtp); createMimeMessage(); } public void setSmtpHost(String hostName) { System.out.println("设置系统属性:mail.smtp.host=" + hostName); if (props == null) { props = System.getProperties(); } props.put("mail.smtp.host", hostName); } public boolean createMimeMessage() { try { System.out.println("准备获取邮件会话对象!"); session = Session.getDefaultInstance(props, null); } catch (Exception e) { System.out.println("获取邮件会话错误!" + e); return false; } System.out.println("准备创建MIME邮件对象!"); try { mimeMsg = new MimeMessage(session); mp = new MimeMultipart(); return true; } catch (Exception e) { System.out.println("创建MIME邮件对象失败!" + e); return false; } } /*定义SMTP是否需要验证*/ public void setNeedAuth(boolean need) { System.out.println("设置smtp身份认证:mail.smtp.auth = " + need); if (props == null) props = System.getProperties(); if (need) { props.put("mail.smtp.auth", "true"); } else { props.put("mail.smtp.auth", "false"); } } public void setNamePass(String name, String pass) { username = name; password = pass; } /*定义邮件主题*/ public boolean setSubject(String mailSubject) { System.out.println("定义邮件主题!"); try { mimeMsg.setSubject(mailSubject); return true; } catch (Exception e) { System.err.println("定义邮件主题发生错误!"); return false; } } /*定义邮件正文*/ public boolean setBody(String mailBody) { try { BodyPart bp = new MimeBodyPart(); bp.setContent("" + mailBody, "text/html;charset=GBK"); mp.addBodyPart(bp); return true; } catch (Exception e) { System.err.println("定义邮件正文时发生错误!" + e); return false; } } /*设置发信人*/ public boolean setFrom(String from) { System.out.println("设置发信人!"); try { mimeMsg.setFrom(new InternetAddress(from)); //发信人 return true; } catch (Exception e) { return false; } } /*定义收信人*/ public boolean setTo(String to) { if (to == null) return false; System.out.println("定义收信人!"); try { mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to)); return true; } catch (Exception e) { return false; } } /*定义抄送人*/ public boolean setCopyTo(String copyto) { if (copyto == null) return false; try { mimeMsg.setRecipients(Message.RecipientType.CC, (Address[]) InternetAddress .parse(copyto)); return true; } catch (Exception e) { return false; } } /*发送邮件模块*/ public boolean sendOut() { try { mimeMsg.setContent(mp); mimeMsg.saveChanges(); System.out.println("邮件发送中...."); Session mailSession = Session.getInstance(props, null); Transport transport = mailSession.getTransport("smtp"); transport.connect((String) props.get("mail.smtp.host"), username, password); transport.sendMessage(mimeMsg, mimeMsg .getRecipients(Message.RecipientType.TO)); System.out.println("发送成功!"); transport.close(); return true; } catch (Exception e) { System.err.println("邮件失败!" + e); return false; } } /*调用sendOut方法完成发送*/ public static boolean sendAndCc(String to,String content) { Mail theMail = new Mail(smtp); theMail.setNeedAuth(true); // 验证 if (!theMail.setSubject(subject)) return false; if (!theMail.setBody(content)) return false; if (!theMail.setTo(to)) return false; if (!theMail.setCopyTo(copyto)) return false; if (!theMail.setFrom(from)) return false; theMail.setNamePass(username, password); if (!theMail.sendOut()) return false; return true; } // public static void main(String[] args) { // String smtp = "smtp.qq.com";// smtp服务器 // String from = "1558168146@qq.com";// 邮件显示名称 // String to = "1558168146@qq.com";// 收件人的邮件地址,必须是真实地址 // String copyto = "";// 抄送人邮件地址 // String subject = "测试邮件";// 邮件标题 // String content = "你好!这是测试邮件,请不要回复";// 邮件内容 // String username = "1558168146";// 发件人真实的账户名 // String password = "13250394wuchunyu";// 发件人密码 // Mail.sendAndCc(smtp, from, to, copyto, subject, content, username, password); // } }
以上代码,经过测试,可以运行成功。注意:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
当出现以上错误时,恭喜您已经离接收邮件不远了,否则请您解决好所有的异常后再来看这个帖子。
javax.mail和javax.activation这两个包已经在javaEE5当中属于基础包了,就是JDK中自带了已经,但是里面的方法与现在外面的mail.jar和activation.jar有一些出入,所以初学者在直接copy别人代码的时候往往会出现上面的错误。
废话不多说下面是解决方法
进到
X:\Program Files\MyEclipse 6.5\myeclipse\eclipse\plugins\com.genuitec.eclipse.j2eedt.core_6.5.0.zmyeclipse650200806\data\libraryset\EE_5
这个路径里,可以看到javaee.jar,用rar把这个文件打开,然后进到javax文件夹里,删除mail.jar和activation.jar(我的javaee.jar里,这两个东西是文件夹,总之删掉就OK,不过要注意备份一下)