使用JavaMail发送邮件

使用JavaMail发送邮件需要用到mail.jar和activtion.jar两个包。

该类实现了较完整的邮件发送功能，包括以HTML格式发送，添加附件和抄送人。下面是具体的代码：

Mail.java：

import java.util.Properties;    import javax.activation.DataHandler;  import javax.activation.FileDataSource;  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; //MIME邮件对象       private Session session; //邮件会话对象       private Properties props; //系统属性       private boolean needAuth = false; //smtp是否需要认证       //smtp认证用户名和密码       private String username;       private String password;       private Multipart mp; //Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象              /**      * Constructor      * @param smtp 邮件发送服务器      */      public Mail(String smtp){           setSmtpHost(smtp);           createMimeMessage();       }         /**      * 设置邮件发送服务器      * @param hostName String       */      public void setSmtpHost(String hostName) {           System.out.println("设置系统属性：mail.smtp.host = "+hostName);           if(props == null)              props = System.getProperties(); //获得系统属性对象            props.put("mail.smtp.host",hostName); //设置SMTP主机       }           /**      * 创建MIME邮件对象        * @return      */      public boolean createMimeMessage()       {           try {               System.out.println("准备获取邮件会话对象！");               session = Session.getDefaultInstance(props,null); //获得邮件会话对象           }           catch(Exception e){               System.err.println("获取邮件会话对象时发生错误！"+e);               return false;           }                 System.out.println("准备创建MIME邮件对象！");           try {               mimeMsg = new MimeMessage(session); //创建MIME邮件对象               mp = new MimeMultipart();                         return true;           } catch(Exception e){               System.err.println("创建MIME邮件对象失败！"+e);               return false;           }       }               /**      * 设置SMTP是否需要验证      * @param need      */      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");           }       }         /**      * 设置用户名和密码      * @param name      * @param pass      */      public void setNamePass(String name,String pass) {           username = name;           password = pass;       }         /**      * 设置邮件主题      * @param mailSubject      * @return      */      public boolean setSubject(String mailSubject) {           System.out.println("设置邮件主题！");           try{               mimeMsg.setSubject(mailSubject);               return true;           }           catch(Exception e) {               System.err.println("设置邮件主题发生错误！");               return false;           }       }            /**       * 设置邮件正文      * @param mailBody String       */       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("设置邮件正文时发生错误！"+e);           return false;           }       }       /**       * 添加附件      * @param filename String       */       public boolean addFileAffix(String filename) {                 System.out.println("增加邮件附件："+filename);           try{               BodyPart bp = new MimeBodyPart();               FileDataSource fileds = new FileDataSource(filename);               bp.setDataHandler(new DataHandler(fileds));               bp.setFileName(fileds.getName());                             mp.addBodyPart(bp);                             return true;           } catch(Exception e){               System.err.println("增加邮件附件："+filename+"发生错误！"+e);               return false;           }       }             /**       * 设置发信人      * @param from String       */       public boolean setFrom(String from) {           System.out.println("设置发信人！");           try{               mimeMsg.setFrom(new InternetAddress(from)); //设置发信人               return true;           } catch(Exception e) {               return false;           }       }       /**       * 设置收信人      * @param to String       */       public boolean setTo(String to){           if(to == null)return false;           try{               mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to));               return true;           } catch(Exception e) {               return false;           }         }             /**       * 设置抄送人      * @param copyto String        */       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      */       public boolean sendOut()       {           try{               mimeMsg.setContent(mp);               mimeMsg.saveChanges();               System.out.println("正在发送邮件....");                             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));               transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.CC));               //transport.send(mimeMsg);                             System.out.println("发送邮件成功！");               transport.close();                             return true;           } catch(Exception e) {               System.err.println("邮件发送失败！"+e);               return false;           }       }         /**      * 调用sendOut方法完成邮件发送      * @param smtp      * @param from      * @param to      * @param subject      * @param content      * @param username      * @param password      * @return boolean      */      public static boolean send(String smtp,String from,String to,String subject,String content,String username,String password) {          Mail theMail = new Mail(smtp);          theMail.setNeedAuth(true); //需要验证                    if(!theMail.setSubject(subject)) return false;          if(!theMail.setBody(content)) return false;          if(!theMail.setTo(to)) return false;          if(!theMail.setFrom(from)) return false;          theMail.setNamePass(username,password);                    if(!theMail.sendOut()) return false;          return true;      }            /**      * 调用sendOut方法完成邮件发送,带抄送      * @param smtp      * @param from      * @param to      * @param copyto      * @param subject      * @param content      * @param username      * @param password      * @return boolean      */      public static boolean sendAndCc(String smtp,String from,String to,String copyto,String subject,String content,String username,String password) {          Mail theMail = new Mail(smtp);          theMail.setNeedAuth(true); //需要验证                    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;      }            /**      * 调用sendOut方法完成邮件发送,带附件      * @param smtp      * @param from      * @param to      * @param subject      * @param content      * @param username      * @param password      * @param filename 附件路径      * @return      */      public static boolean send(String smtp,String from,String to,String subject,String content,String username,String password,String filename) {          Mail theMail = new Mail(smtp);          theMail.setNeedAuth(true); //需要验证                    if(!theMail.setSubject(subject)) return false;          if(!theMail.setBody(content)) return false;          if(!theMail.addFileAffix(filename)) return false;           if(!theMail.setTo(to)) return false;          if(!theMail.setFrom(from)) return false;          theMail.setNamePass(username,password);                    if(!theMail.sendOut()) return false;          return true;      }            /**      * 调用sendOut方法完成邮件发送,带附件和抄送      * @param smtp      * @param from      * @param to      * @param copyto      * @param subject      * @param content      * @param username      * @param password      * @param filename      * @return      */      public static boolean sendAndCc(String smtp,String from,String to,String copyto,String subject,String content,String username,String password,String filename) {          Mail theMail = new Mail(smtp);          theMail.setNeedAuth(true); //需要验证                    if(!theMail.setSubject(subject)) return false;          if(!theMail.setBody(content)) return false;          if(!theMail.addFileAffix(filename)) 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;      }        }   

 测试代码：

 

public static void main(String[] args){      String smtp = "SMTP服务器";      String from = "发信人";      String to = "收信人";      String copyto = "抄送人";      String subject = "邮件主题";      String content = "邮件内容";      String username="用户名";      String password="密码";      String filename = "附件路径，如：F:\\笔记<a>\\struts2</a>与mvc.txt";      Mail.sendAndCc(smtp, from, to, copyto, subject, content, username, password, filename);  }