(转)用javamail发送带附件的邮件

本文转载自：http://redleaf.iteye.com/blog/78217

mail.java 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：
"+"身份验证错误!";  
                 e.printStackTrace();   
            }catch (MessagingException e) {  
                 message="邮件发送失败！错误原因：
"+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("
提示信息:"+message);  
            map.put("message", message);  
            return map;  
        }  
         
    }  

SmtpAuth.java 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);   
        }   
    }