通过javaMail发送邮件，可选添加多个收件人，密送，抄送，多个附件

客官°小女子只卖身不卖艺 2022-04-10 02:53 855阅读 0赞

# 通过javaMail发送邮件，可选添加多个收件人，密送，抄送，多个附件 #

[https://blog.csdn.net/qq\_35434831/article/details/79666035][https_blog.csdn.net_qq_35434831_article_details_79666035]

自己通过学习多人的代码，并整理了一个简单，调用方便的通过javaMail发送邮件。只需填写发件邮箱地址，密码；收件人地址，附件，选择是否保存，设置自己发送邮件时的昵称就ok了。代码自动匹配设置smtp服务地址和端口。

发送邮件需要邮箱地址和密码，开启**POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务。**各大邮箱使用外部登录验证的方式不一样，有些需要使用授权码登录链接，有些只需要邮箱登录密码，这个得根据你使用的邮箱服务平台的规定了。这里我收集了下面的邮箱smtp服务地址和端口，【**QQ、Foxmail、139、126、163、Google(gmail)、Exchange、Outlook、sina.cn、sina.com**】这些足以够用了吧！不多说，看代码。

使用方法

1.  `public static void main(String[] args) throws Exception {`
2.   
3.  `List<String> map = new ArrayList<>();`
4.  `map.add("123456@qq.com");`
5.  `map.add("456789@qq.com");`
6.  `map.add("hahaha123@gmail.com");`
7.  `new SendEmail("hahaha123@gmail.com", "密码")`
8.  `.setDebug(true)`
9.  `.setMyNickName("这是我的昵称")`
10. `.addFile("C:/Users/25171/Pictures/timg.jpg")//添加附件`
11. `.addFile("C:/Users/25171/Desktop/QQ图片20180317192741.jpg")`
12. `// .addFile(List<String> list)//添加附件集合`
13. `.setSaveEmail("C:/User/2517/Desktop/name.eml")//保存邮件`
14. `.addRecipientT0("251716795@qq.com")//添加收件人地址`
15. `// .addRecipientT0(map)//添加收件人地址集合`
16. `// .addRecipientCC(map)//添加密送收件人地址`
17. `// .addRecipientBCC(map)//添加抄送收件人地址`
18. `.createMail("标题", "发送的内容", "text/html;charset=utf-8")`
19. `.sendEmail(new SendEmail.Callback() {`
20. `@Override`
21. `public void success(String s) {`
22. `System.out.println(s);//发送完成后回调接口`
23. `}`
24.  
25. `@Override`
26. `public void error(String s, Exception e) {`
27. `System.out.println(s);`
28. `e.printStackTrace();//异常失败的回调接口`
29. `}`
30. `});`
31. `}`

主体工具代码

1.  `package com.sai.mail;`
2.   
3.  `import javax.activation.DataHandler;`
4.  `import javax.activation.FileDataSource;`
5.  `import javax.mail.*;`
6.  `import javax.mail.internet.*;`
7.  `import java.io.FileOutputStream;`
8.  `import java.io.IOException;`
9.  `import java.io.OutputStream;`
10. `import java.io.UnsupportedEncodingException;`
11. `import java.util.*;`
12.  
13. `public class SendEmail {`
14.  
15. `public interface Callback {`
16. `void success(String s);`
17.  
18. `void error(String s, Exception e);`
19. `}`
20.  
21. `private Callback callback; //信息回调接口`
22. `private Properties properties;//系统属性对象`
23. `private String mailAccount; //发送邮箱地址`
24. `private String mailPassword; //验证密码`
25. `private Session session; //邮件会话对象`
26. `private String myNickName; //昵称，发送时自己的昵称`
27. `private boolean debug = false;//debug模式`
28. `private boolean isSaveEmail = false;`
29. `private String pathName = "exc.eml";//邮件保存时的`
30.  
31. `public SendEmail(String mailAccount, String mailPassword) {`
32. `this.mailAccount = mailAccount;`
33. `this.mailPassword = mailPassword;`
34. `}`
35.  
36. `public SendEmail setSaveEmail(String pathName) {`
37. `isSaveEmail = true;`
38. `this.pathName = pathName;`
39. `return this;`
40. `}`
41.  
42. `private List<String> recipientT0List = new ArrayList<>();//收件地址`
43. `private List<String> recipientCCList = new ArrayList<>();//密送地址`
44. `private List<String> recipientBCCList = new ArrayList<>();//抄送地址`
45. `private List<String> filePath = new ArrayList<>();//附件`
46.  
47. `public SendEmail setDebug(boolean sessionDebug) {`
48. `debug = sessionDebug;`
49. `return this;`
50. `}`
51.  
52. `/*** 设置多人收件人地址 */`
53. `public SendEmail addRecipientT0(String address) {`
54. `recipientT0List.add(address);`
55. `return this;`
56. `}`
57.  
58. `public SendEmail addRecipientCC(String address) {`
59. `recipientCCList.add(address);`
60. `return this;`
61. `}`
62.  
63. `public SendEmail addRecipientBCC(String address) {`
64. `recipientBCCList.add(address);`
65. `return this;`
66. `}`
67.  
68. `public SendEmail addRecipientT0(List<String> address) {`
69. `recipientT0List.addAll(address);`
70. `return this;`
71. `}`
72.  
73. `public SendEmail addRecipientCC(List<String> address) {`
74. `recipientCCList.addAll(address);`
75. `return this;`
76. `}`
77.  
78. `public SendEmail addRecipientBCC(List<String> address) {`
79. `recipientBCCList.addAll(address);`
80. `return this;`
81. `}`
82.  
83. `/***添加文件***/`
84. `public SendEmail addFile(String filePath) {`
85. `this.filePath.add(filePath);`
86. `return this;`
87. `}`
88.  
89. `public SendEmail addFile(List<String> list) {`
90. `this.filePath.addAll(list);`
91. `return this;`
92. `}`
93.  
94. `/****昵称设置**/`
95. `public SendEmail setMyNickName(String name) {`
96. `myNickName = name;`
97. `return this;`
98. `}`
99.  
100. `private MimeMessage message;`
101.  
102. `/**`
103. `* @param title 主题`
104. `* @param datas 内容`
105. `* @param type 内容格式类型 text/html;charset=utf-8`
106. `* @return s`
107. `*/`
108. `public SendEmail createMail(String title, String datas, String type) {`
109. `if (mailAccount.length() == 0 || mailAccount.equals(null)) {`
110. `System.err.println("发件地址不存在！");`
111. `return this;`
112. `}`
113. `if (myNickName == null) {`
114. `myNickName = mailAccount;`
115. `}`
116. `getProperties();`
117. `if (!sync) return this;`
118. `try {`
119. `message = new MimeMessage(session);`
120. `// 设置发送邮件地址,param1 代表发送地址 param2 代表发送的名称(任意的) param3 代表名称编码方式`
121. `message.setFrom(new InternetAddress(mailAccount, myNickName, "utf-8"));`
122.  
123. `setRecipientT0(); //添加接收人地址`
124. `setRecipientCC(); //添加抄送接收人地址`
125. `setRecipientBCC(); //添加密送接收人地址`
126. `BodyPart messageBodyPart = new MimeBodyPart(); // 创建消息部分`
127. `Multipart multipart = new MimeMultipart(); // 创建多重消息`
128.  
129. `messageBodyPart.setContent(datas, type); // 消息内容`
130. `multipart.addBodyPart(messageBodyPart); // 设置文本消息部分`
131.  
132. `addFile(multipart); //附件部分`
133. `// 发送完整消息`
134. `message.setContent(multipart);`
135. `message.setSubject(title); // 设置邮件主题`
136. `message.setSentDate(new Date()); // 设置发送时间`
137. `message.saveChanges(); // 保存上面的编辑内容`
138. `// 将上面创建的对象写入本地`
139. `saveEmail(title);`
140. `} catch (Exception e) {`
141. `if (callback != null)`
142. `callback.error("message error ", e);`
143. `sync = false;`
144. `}`
145. `return this;`
146. `}`
147.  
148. `public void sendEmail(Callback callback) {`
149. `this.callback = callback;`
150. `if (!sync)`
151. `return;`
152. `try {`
153. `Transport trans = session.getTransport();`
154. `// 链接邮件服务器`
155. `trans.connect(mailAccount, mailPassword);`
156. `// 发送信息`
157. `trans.sendMessage(message, message.getAllRecipients());`
158. `// 关闭链接`
159. `trans.close();`
160. `if (callback != null)`
161. `callback.success("发送完成");`
162. `} catch (Exception e) {`
163. `if (callback != null)`
164. `callback.error("发送异常", e);`
165. `}`
166. `}`
167.  
168. `private void saveEmail(String title) throws IOException, MessagingException {`
169. `OutputStream out = null;`
170. `if (isSaveEmail) {`
171. `if (pathName.length() == 0 || pathName.equals(null)) {`
172. `out = new FileOutputStream(title + ".eml");`
173. `} else {`
174. `String path[] = pathName.split("\\.");`
175. `out = new FileOutputStream(path[0] + title + ".eml");`
176. `}`
177. `}`
178. `message.writeTo(out);`
179. `out.flush();`
180. `out.close();`
181. `}`
182.  
183. `/*** 设置收件人地址信息*/`
184. `private void setRecipientT0() throws MessagingException, UnsupportedEncodingException {`
185. `if (recipientT0List.size() > 0) {`
186. `InternetAddress[] sendTo = new InternetAddress[recipientT0List.size()];`
187. `for (int i = 0; i < recipientT0List.size(); i++) {`
188. `System.out.println("发送到:" + recipientT0List.get(i));`
189. `sendTo[i] = new InternetAddress(recipientT0List.get(i), "", "UTF-8");`
190. `}`
191. `message.addRecipients(MimeMessage.RecipientType.TO, sendTo);`
192. `}`
193. `}`
194.  
195. `/***设置密送地址**/`
196. `private void setRecipientCC() throws MessagingException, UnsupportedEncodingException {`
197. `if (recipientCCList.size() > 0) {`
198. `InternetAddress[] sendTo = new InternetAddress[recipientCCList.size()];`
199. `for (int i = 0; i < recipientCCList.size(); i++) {`
200. `System.out.println("发送到:" + recipientCCList.get(i));`
201. `sendTo[i] = new InternetAddress(recipientCCList.get(i), "", "UTF-8");`
202. `}`
203. `message.addRecipients(MimeMessage.RecipientType.CC, sendTo);`
204. `}`
205. `}`
206.  
207. `/***设置抄送邮件地址**/`
208. `private void setRecipientBCC() throws MessagingException, UnsupportedEncodingException {`
209. `if (recipientBCCList.size() > 0) {`
210. `InternetAddress[] sendTo = new InternetAddress[recipientBCCList.size()];`
211. `for (int i = 0; i < recipientBCCList.size(); i++) {`
212. `System.out.println("发送到:" + recipientBCCList.get(i));`
213. `sendTo[i] = new InternetAddress(recipientBCCList.get(i), "", "UTF-8");`
214. `}`
215. `message.addRecipients(MimeMessage.RecipientType.BCC, sendTo);`
216. `}`
217. `}`
218.  
219. `/***添加附件****/`
220. `private void addFile(Multipart multipart) throws MessagingException, UnsupportedEncodingException {`
221. `if (filePath.size() == 0)`
222. `return;`
223. `for (int i = 0; i < filePath.size(); i++) {`
224. `MimeBodyPart messageBodyPart = new MimeBodyPart();`
225. `// 选择出每一个附件名`
226. `String pathName = filePath.get(i);`
227. `System.out.println("添加附件 ====>" + pathName);`
228. `// 得到数据源`
229. `FileDataSource fds = new FileDataSource(pathName);`
230. `// 得到附件本身并至入BodyPart`
231. `messageBodyPart.setDataHandler(new DataHandler(fds));`
232. `//采用这去除中文乱码`
233. `messageBodyPart.setFileName(MimeUtility.encodeText(fds.getName()));`
234. `multipart.addBodyPart(messageBodyPart);`
235. `}`
236. `}`
237.  
238. `private boolean sync = true;`
239.  
240. `/**`
241. `* 规定设置 传输协议为smtp 根据输入的邮箱地址自动匹配smtp服务器地址与smtp服务器地址端口`
242. `*/`
243. `private void getProperties() {`
244. `String account[] = mailAccount.split("@");`
245. `String mailTpye = "";`
246. `try {`
247. `mailTpye = account[1];`
248. `} catch (Exception e) {`
249. `System.err.println("不正确的邮箱地址！");`
250. `sync = false;`
251. `return;`
252. `}`
253. `String SMTPHost = "";//smtp服务器地址`
254. `String SMTPPort = "";//smtp服务器地址端口`
255. `switch (mailTpye) {`
256. `case "qq.com":`
257. `case "foxmail.com":`
258. `SMTPHost = "smtp.qq.com";`
259. `SMTPPort = "465";`
260. `break;`
261. `case "sina.com":`
262. `SMTPHost = "smtp.sina.com";`
263. `SMTPPort = "25";`
264. `break;`
265. `case "sina.cn":`
266. `SMTPHost = "smtp.sina.cn";`
267. `SMTPPort = "25";`
268. `break;`
269. `case "139.com":`
270. `SMTPHost = "smtp.139.com";`
271. `SMTPPort = "465";`
272. `break;`
273. `case "163.com":`
274. `SMTPHost = "smtp.163.com";`
275. `SMTPPort = "25";`
276. `break;`
277. `case "188.com":`
278. `SMTPHost = "smtp.188.com";`
279. `SMTPPort = "25";`
280. `break;`
281. `case "126.com":`
282. `SMTPHost = "smtp.126.com";`
283. `SMTPPort = "25";`
284. `break;`
285. `case "gmail.com":`
286. `SMTPHost = "smtp.gmail.com";`
287. `SMTPPort = "465";`
288. `break;`
289. `case "outlook.com":`
290. `SMTPHost = "smtp.outlook.com";`
291. `SMTPPort = "465";`
292. `break;`
293. `default:`
294. `System.err.println("暂时不支持此账号作为服务账号发送邮件！");`
295. `return;`
296. `}`
297. `Properties prop = new Properties();`
298. `prop.setProperty("mail.transport.protocol", "smtp"); // 设置邮件传输采用的协议smtp`
299. `prop.setProperty("mail.smtp.host", SMTPHost);// 设置发送人邮件服务器的smtp地址`
300. `prop.setProperty("mail.smtp.auth", "true"); // 设置验证机制`
301. `prop.setProperty("mail.smtp.port", SMTPPort);// SMTP 服务器的端口 (非 SSL 连接的端口一般默认为 25, 可以不添加, 如果开启了 SSL 连接,`
302. `prop.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");`
303. `prop.setProperty("mail.smtp.socketFactory.fallback", "false");`
304. `prop.setProperty("mail.smtp.socketFactory.port", SMTPPort);`
305. `properties = prop;`
306. `session = Session.getInstance(properties);`
307. `session.setDebug(debug);`
308. `}`
309.  
310. `}`

完成这些需要导入的重要jar包：mail-1.4.1.jar(或者更高的版本) 和 activation 包，jdk1.8中rt.jar包含的activation 包。所以jdk1.8的就无需考虑activation 怎么下载了。

完成解析分配服务器地址和端口的主要函数（写的不怎么好）：

1.  `private void getProperties() {`
2.  `String account[] = mailAccount.split("@");`
3.  `String mailTpye = "";`
4.  `try {`
5.  `mailTpye = account[1];`
6.  `} catch (Exception e) {`
7.  `System.err.println("不正确的邮箱地址！");`
8.  `sync = false;`
9.  `return;`
10. `}`
11. `String SMTPHost = "";//smtp服务器地址`
12. `String SMTPPort = "";//smtp服务器地址端口`
13. `switch (mailTpye) {`
14. `case "qq.com":`
15. `case "foxmail.com":`
16. `SMTPHost = "smtp.qq.com";`
17. `SMTPPort = "465";`
18. `break;`
19. `case "sina.com":`
20. `SMTPHost = "smtp.sina.com";`
21. `SMTPPort = "25";`
22. `break;`
23. `case "sina.cn":`
24. `SMTPHost = "smtp.sina.cn";`
25. `SMTPPort = "25";`
26. `break;`
27. `case "139.com":`
28. `SMTPHost = "smtp.139.com";`
29. `SMTPPort = "465";`
30. `break;`
31. `case "163.com":`
32. `SMTPHost = "smtp.163.com";`
33. `SMTPPort = "25";`
34. `break;`
35. `case "188.com":`
36. `SMTPHost = "smtp.188.com";`
37. `SMTPPort = "25";`
38. `break;`
39. `case "126.com":`
40. `SMTPHost = "smtp.126.com";`
41. `SMTPPort = "25";`
42. `break;`
43. `case "gmail.com":`
44. `SMTPHost = "smtp.gmail.com";`
45. `SMTPPort = "465";`
46. `break;`
47. `case "outlook.com":`
48. `SMTPHost = "smtp.outlook.com";`
49. `SMTPPort = "465";`
50. `break;`
51. `default:`
52. `System.err.println("暂时不支持此账号作为服务账号发送邮件！");`
53. `return ;`
54. `}`
55. `Properties prop = new Properties();`
56. `prop.setProperty("mail.transport.protocol", "smtp"); // 设置邮件传输采用的协议smtp`
57. `prop.setProperty("mail.smtp.host", SMTPHost);// 设置发送人邮件服务器的smtp地址`
58. `prop.setProperty("mail.smtp.auth", "true"); // 设置验证机制`
59. `prop.setProperty("mail.smtp.port", SMTPPort);// SMTP 服务器的端口 (非 SSL 连接的端口一般默认为 25, 可以不添加`
60. `prop.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");`
61. `prop.setProperty("mail.smtp.socketFactory.fallback", "false");`
62. `prop.setProperty("mail.smtp.socketFactory.port", SMTPPort);`
63. `properties = prop;`
64. `session = Session.getInstance(properties);`
65. `session.setDebug(debug);`
66. `}`

最后看看效果：

![20180323134607277][]

[https_blog.csdn.net_qq_35434831_article_details_79666035]: https://blog.csdn.net/qq_35434831/article/details/79666035
[20180323134607277]: /images/20220403/694b44b2bff14681aad155f620a6039d.png