网上图书商城项目学习笔记-005邮件辅助类

邮件辅助类

一、使用方法

在servlet层中调用UserService.java

 1     public void regist(User user) {
 2         //1. 数据的补齐
 3         user.setUid(CommonUtils.uuid());
 4         user.setStatus(false);
 5         user.setActivationCode(CommonUtils.uuid() + CommonUtils.uuid());
 6         
 7         //2. 向数据库插入
 8         try {
 9             userDao.add(user);
10         } catch (SQLException e) {
11             throw new RuntimeException(e);
12         }
13         
14         //3. 发邮件
15         //3.1 把配置文件内容加载到prop中
16         Properties prop = new Properties();
17         try {
18             prop.load(this.getClass().getClassLoader().getResourceAsStream("email_template.properties"));
19         } catch (IOException e) {
20             throw new RuntimeException(e);
21         }
22         //3.2  登录邮件服务器，得到session
23         String host = prop.getProperty("host");
24         String username = prop.getProperty("username");
25         String password = prop.getProperty("password");
26         Session session = MailUtils.createSession(host, username, password);
27         
28         //3.3 创建Mail对象
29         String from = prop.getProperty("from");
30         String to = user.getEmail();
31         String subject = prop.getProperty("subject");
32         // MessageForm.format方法会把第一个参数中的{0},使用第二个参数来替换。
33         // 例如MessageFormat.format("你好{0}, 你{1}!", "张三", "去死吧"); 返回“你好张三，你去死吧！”
34         String content = MessageFormat.format(prop.getProperty("content"), user.getActivationCode());
35         Mail mail = new Mail(from, to ,subject, content);
36         
37         //3.4 发送邮件
38         try {
39             MailUtils.send(session, mail);
40         } catch (MessagingException e) {
41             throw new RuntimeException(e);
42         } catch (IOException e) {
43             throw new RuntimeException(e);
44         }
45     }

二、源代码

1.MailUtils.java

 1 package cn.itcast.mail;
 2 
 3 import java.io.IOException;
 4 import java.util.List;
 5 import java.util.Properties;
 6 
 7 import javax.mail.Authenticator;
 8 import javax.mail.Message.RecipientType;
 9 import javax.mail.MessagingException;
10 import javax.mail.PasswordAuthentication;
11 import javax.mail.Session;
12 import javax.mail.Transport;
13 import javax.mail.internet.InternetAddress;
14 import javax.mail.internet.MimeBodyPart;
15 import javax.mail.internet.MimeMessage;
16 import javax.mail.internet.MimeMultipart;
17 import javax.mail.internet.MimeUtility;
18 
19 /**
20  * 
21  * @author itcast 本类只有这么一个方法，用来发邮件！
22  */
23 public class MailUtils {
24     public static Session createSession(String host, final String username, final String password) {
25         Properties prop = new Properties();
26         prop.setProperty("mail.host", host);// 指定主机
27         prop.setProperty("mail.smtp.auth", "true");// 指定验证为true
28 
29         // 创建验证器
30         Authenticator auth = new Authenticator() {
31             public PasswordAuthentication getPasswordAuthentication() {
32                 return new PasswordAuthentication(username, password);
33             }
34         };
35         
36         // 获取session对象
37         return Session.getInstance(prop, auth);
38     }
39     
40     /**
41      * 发送指定的邮件
42      * 
43      * @param mail
44      */
45     public static void send(Session session, final Mail mail) throws MessagingException,
46             IOException {
47 
48         MimeMessage msg = new MimeMessage(session);// 创建邮件对象
49         msg.setFrom(new InternetAddress(mail.getFrom()));// 设置发件人
50         msg.addRecipients(RecipientType.TO, mail.getToAddress());// 设置收件人
51 
52         // 设置抄送
53         String cc = mail.getCcAddress();
54         if (!cc.isEmpty()) {
55             msg.addRecipients(RecipientType.CC, cc);
56         }
57 
58         // 设置暗送
59         String bcc = mail.getBccAddress();
60         if (!bcc.isEmpty()) {
61             msg.addRecipients(RecipientType.BCC, bcc);
62         }
63 
64         msg.setSubject(mail.getSubject());// 设置主题
65 
66         MimeMultipart parts = new MimeMultipart();// 创建部件集对象
67 
68         MimeBodyPart part = new MimeBodyPart();// 创建一个部件
69         part.setContent(mail.getContent(), "text/html;charset=utf-8");// 设置邮件文本内容
70         parts.addBodyPart(part);// 把部件添加到部件集中
71         
72         ///////////////////////////////////////////
73 
74         // 添加附件
75         List<AttachBean> attachBeanList = mail.getAttachs();// 获取所有附件
76         if (attachBeanList != null) {
77             for (AttachBean attach : attachBeanList) {
78                 MimeBodyPart attachPart = new MimeBodyPart();// 创建一个部件
79                 attachPart.attachFile(attach.getFile());// 设置附件文件
80                 attachPart.setFileName(MimeUtility.encodeText(attach
81                         .getFileName()));// 设置附件文件名
82                 String cid = attach.getCid();
83                 if(cid != null) {
84                     attachPart.setContentID(cid);
85                 }
86                 parts.addBodyPart(attachPart);
87             }
88         }
89 
90         msg.setContent(parts);// 给邮件设置内容
91         Transport.send(msg);// 发邮件
92     }
93 }

2.Mail.java

  1 package cn.itcast.mail;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 /**
  7  * 表示邮件类，你需要设置：账户名和密码、收件人、抄送(可选)、暗送(可选)、主题、内容，以及附件(可选)
  8  * 
  9  * 在创建了Mail对象之后
 10  * 可以调用它的setSubject()、setContent()，设置主题和正文
 11  * 也可以调用setFrom()和　addToAddress()，设置发件人，和添加收件人。
 12  * 也可以调用addAttch()添加附件
 13  * 创建AttachBean：new AttachBean(new File("..."), "fileName");
 14  */
 15 public class Mail {
 16     private String from;//发件人
 17     private StringBuilder toAddress = new StringBuilder();//收件人
 18     private StringBuilder ccAddress = new StringBuilder();//抄送
 19     private StringBuilder bccAddress = new StringBuilder();//暗送
 20     
 21     private String subject;//主题
 22     private String content;//正文
 23     
 24     // 附件列表
 25     private List<AttachBean> attachList = new ArrayList<AttachBean>();
 26     
 27     public Mail() {}
 28     
 29     public Mail(String from, String to) {
 30         this(from, to, null, null);
 31     }
 32     
 33     public Mail(String from, String to, String subject, String content) {
 34         this.from = from;
 35         this.toAddress.append(to);
 36         this.subject = subject;
 37         this.content = content;
 38     }
 39     
 40     /**
 41      * 返回发件人
 42      * @return
 43      */
 44     public void setFrom(String from) {
 45         this.from = from;
 46     }
 47     
 48     /**
 49      * 返回发件人
 50      * @return
 51      */
 52     public String getFrom() {
 53         return from;
 54     }
 55     
 56     /**
 57      * 返回主题
 58      */
 59     public String getSubject() {
 60         return subject;
 61     }
 62 
 63     /**
 64      * 设置主题
 65      */
 66     public void setSubject(String subject) {
 67         this.subject = subject;
 68     }
 69 
 70     /**
 71      * 获取主题内容
 72      */
 73     public String getContent() {
 74         return content;
 75     }
 76 
 77     /**
 78      * 设置主题内容
 79      * @param content
 80      */
 81     public void setContent(String content) {
 82         this.content = content;
 83     }
 84 
 85     /**
 86      * 获取收件人
 87      * @return
 88      */
 89     public String getToAddress() {
 90         return toAddress.toString();
 91     }
 92 
 93     /**
 94      * 获取抄送
 95      * @return
 96      */
 97     public String getCcAddress() {
 98         return ccAddress.toString();
 99     }
100 
101     /**
102      * 获取暗送
103      * @return
104      */
105     public String getBccAddress() {
106         return bccAddress.toString();
107     }
108 
109     /**
110      * 添加收件人,可以是多个收件人
111      * @param to
112      */
113     public void addToAddress(String to) {
114         if(this.toAddress.length() > 0) {
115             this.toAddress.append(",");
116         }
117         this.toAddress.append(to);
118     }
119 
120     /**
121      * 添加抄送人，可以是多个抄送人
122      * @param cc
123      */
124     public void addCcAddress(String cc) {
125         if(this.ccAddress.length() > 0) {
126             this.ccAddress.append(",");
127         }
128         this.ccAddress.append(cc);
129     }
130 
131     /**
132      * 添加暗送人，可以是多个暗送人
133      * @param bcc
134      */
135     public void addBccAddress(String bcc) {
136         if(this.bccAddress.length() > 0) {
137             this.bccAddress.append(",");
138         }
139         this.bccAddress.append(bcc);
140     }
141     
142     /**
143      * 添加附件，可以添加多个附件
144      * @param attachBean
145      */
146     public void addAttach(AttachBean attachBean) {
147         this.attachList.add(attachBean);
148     }
149     
150     /**
151      * 获取所有附件
152      * @return
153      */
154     public List<AttachBean> getAttachs() {
155         return this.attachList;
156     }
157 }

3.AttachBean.java

 1 package cn.itcast.mail;
 2 
 3 import java.io.File;
 4 
 5 /*
 6  * 附件类，只有文件，即附件才文件名
 7  */
 8 public class AttachBean {
 9     private String cid;
10     private File file;
11     private String fileName;
12 
13     public String getCid() {
14         return cid;
15     }
16 
17     public void setCid(String cid) {
18         this.cid = cid;
19     }
20     
21     public File getFile() {
22         return file;
23     }
24 
25     public void setFile(File file) {
26         this.file = file;
27     }
28 
29     public String getFileName() {
30         return fileName;
31     }
32 
33     public void setFileName(String fileName) {
34         this.fileName = fileName;
35     }
36 
37     public AttachBean() {
38 
39     }
40 
41     public AttachBean(File file, String fileName) {
42         super();
43         this.file = file;
44         this.fileName = fileName;
45     }
46 }