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关于新增独立 IP 增值服务的公告
Java 调用示例
以下代码示例，是 Demo 使用 JDK 1.8：
package org.example;import javax.mail.*;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import java.io.UnsupportedEncodingException;import java.nio.charset.StandardCharsets;import java.util.Properties;public class SampleMail {private static final String SMTP_HOST = "sg-smtp.qcloudmail.com";private static final String SMTP_PORT = "465";public static void main(String[] args) {// 配置发送邮件的环境属性final Properties props = new Properties();props.put("mail.transport.protocol", "smtps"); // smtps表示隐式TLS，对应465端口。否则为587端口，显式TLS// 表示SMTP发送邮件，需要进行身份验证props.put("mail.smtp.auth", "true");props.put("mail.smtp.host", SMTP_HOST);// 如果使用ssl，则去掉使用25端口的配置，进行如下配置,props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");props.put("mail.smtp.socketFactory.port", SMTP_PORT);props.put("mail.smtp.port", SMTP_PORT);// 发件人的账号，填写控制台配置的发信地址,比如xxx@xxx.comprops.put("mail.user", "xxx@xxx.com");// 访问SMTP服务时需要提供的密码(在控制台选择发信地址进行设置)props.put("mail.password", "XXXX");props.setProperty("mail.smtp.socketFactory.fallback", "false");props.put("mail.smtp.ssl.enable", "true");//props.put("mail.smtp.starttls.enable","true");// 构建授权信息，用于进行SMTP进行身份验证Authenticator authenticator = new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {// 用户名、密码String userName = props.getProperty("mail.user");String password = props.getProperty("mail.password");return new PasswordAuthentication(userName, password);}};// 使用环境属性和授权信息，创建邮件会话Session mailSession = Session.getInstance(props, authenticator);// mailSession.setDebug(true);//UUID uuid = UUID.randomUUID();//final String messageIDValue = "<" + uuid.toString() + ">";// 创建邮件消息MimeMessage message = new MimeMessage(mailSession) {//@Override//protected void updateMessageID() throws MessagingException {//设置自定义Message-ID值//setHeader("Message-ID", messageIDValue);//}};try {// 设置发件人邮件地址和名称。填写控制台配置的发信地址,比如xxx@xxx.com。和上面的mail.user保持一致。名称用户可以自定义填写。InternetAddress from = new InternetAddress("xxx@xxx.com", "test");message.setFrom(from);//可选。设置回信地址// Address[] a = new Address[1];// a[0] = new InternetAddress("***");// message.setReplyTo(a);// 设置收件人邮件地址，比如yyy@yyy.comInternetAddress to = new InternetAddress("xxx@xxx.com");message.setRecipient(MimeMessage.RecipientType.TO, to);//如果同时发给多人，才将上面两行替换为如下（因为部分收信系统的一些限制，尽量每次投递给一个人；同时我们限制单次允许发送的人数是50人）：//InternetAddress[] adds = new InternetAddress[2];//adds[0] = new InternetAddress("xxx@xxx.com");//adds[1] = new InternetAddress("xxx@xxx.com");//message.setRecipients(Message.RecipientType.TO, adds);// 设置邮件标题message.setSubject("测试邮件");message.setHeader("Content-Transfer-Encoding", "base64");// 设置邮件的内容体 type: text/plain（纯文本）text/html（HTML 文档）message.setContent("<!DOCTYPE html>\\n<html>\\n<head>\\n<meta charset=\\"utf-8\\">\\n<title>hello world</title>\\n</head>\\n<body>\\n " +"<h1>我的第一个标题</h1>\\n <p>我的第一个段落。</p>\\n</body>\\n</html>", "text/html;charset=UTF-8");//发送邮件Transport.send(message);} catch (MessagingException | UnsupportedEncodingException e) {String err = e.getMessage();err = new String(err.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8);System.out.println(err);}}}
发送附件
package org.example;import javax.activation.DataHandler;import javax.activation.FileDataSource;import javax.mail.*;import javax.mail.internet.*;import java.io.UnsupportedEncodingException;import java.nio.charset.StandardCharsets;import java.util.Properties;import java.util.UUID;public class SampleMailAttach {private static final String SMTP_HOST = "sg-smtp.qcloudmail.com";private static final String SMTP_PORT = "465";public static void main(String[] args) {// 配置发送邮件的环境属性final Properties props = new Properties();props.put("mail.transport.protocol", "smtps"); // smtps表示隐式TLS，对应465端口。否则为587端口，显式TLS// 表示SMTP发送邮件，需要进行身份验证props.put("mail.smtp.auth", "true");props.put("mail.smtp.host", SMTP_HOST);// 如果使用ssl，则去掉使用25端口的配置，进行如下配置,props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");props.put("mail.smtp.socketFactory.port", SMTP_PORT);props.put("mail.smtp.port", SMTP_PORT);// 发件人的账号，填写控制台配置的发信地址,比如xxx@xxx.comprops.put("mail.user", "xxx@xxx.com");// 访问SMTP服务时需要提供的密码(在控制台选择发信地址进行设置)props.put("mail.password", "XXXX");props.setProperty("mail.smtp.socketFactory.fallback", "false");props.put("mail.smtp.ssl.enable", "true");//props.put("mail.smtp.starttls.enable","true");// 构建授权信息，用于进行SMTP进行身份验证Authenticator authenticator = new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {// 用户名、密码String userName = props.getProperty("mail.user");String password = props.getProperty("mail.password");return new PasswordAuthentication(userName, password);}};// 使用环境属性和授权信息，创建邮件会话Session mailSession = Session.getInstance(props, authenticator);UUID uuid = UUID.randomUUID();final String messageIDValue = "<" + uuid.toString() + ">";//创建邮件消息MimeMessage message = new MimeMessage(mailSession) {@Overrideprotected void updateMessageID() throws MessagingException {//设置自定义Message-ID值setHeader("Message-ID", messageIDValue);}};try {// 设置发件人邮件地址和名称。填写控制台配置的发信地址,和mail.user保持一致。发信别名可以自定义，如test。InternetAddress from = new InternetAddress("xxx@xxx.com", "test");message.setFrom(from);//可选。设置回信地址Address[] a = new Address[1];a[0] = new InternetAddress("xxx@xxx.com");message.setReplyTo(a);//设置收件人邮件地址，比如yyy@yyy.comInternetAddress to = new InternetAddress("xxx@xxx.com");message.setRecipient(MimeMessage.RecipientType.TO, to);//如果同时发给多人，才将上面两行替换为如下（因为部分收信系统的一些限制，尽量每次投递给一个人；同时我们限制单次允许发送的人数是50人）：/*InternetAddress[] adds = new InternetAddress[2];adds[0] = new InternetAddress("xxx@xxx.com");adds[1] = new InternetAddress("xxx@xxx.com");message.setRecipients(Message.RecipientType.TO, adds);*/// 设置邮件标题message.setSubject("测试邮件");//发送附件，总的邮件大小不超过10M，创建消息部分BodyPart messageBodyPart = new MimeBodyPart();//消息 text/plain（纯文本）text/html（HTML 文档）messageBodyPart.setText("<!DOCTYPE html>\\n<html>\\n<head>\\n<meta charset=\\"utf-8\\">\\n<title>hello world</title>\\n</head>\\n<body>\\n " +"<h1>我的第一个标题</h1>\\n <p>我的第一个段落。</p>\\n</body>\\n</html>");messageBodyPart.setHeader("Content-Type", "text/plain;charset=utf-8");//创建多重消息Multipart multipart = new MimeMultipart();//设置文本消息部分multipart.addBodyPart(messageBodyPart);//附件部分messageBodyPart = new MimeBodyPart();//设置要发送附件的文件路径String filename = "/Users/aaa/bbb/a.txt";FileDataSource source = new FileDataSource(filename);messageBodyPart.setDataHandler(new DataHandler(source));//处理附件名称中文（附带文件路径）乱码问题String filenameEncode = MimeUtility.encodeText(filename, "UTF-8", "base64");messageBodyPart.setFileName(filenameEncode);messageBodyPart.setHeader("Content-Transfer-Encoding", "base64");messageBodyPart.setHeader("Content-Disposition", "attachment");messageBodyPart.setHeader("Content-Type", "application/octet-stream;name=\\"" + filenameEncode + "\\"");multipart.addBodyPart(messageBodyPart);//附件部分,多个附件，分为多个partBodyPart messageBodyPart1 = new MimeBodyPart();//设置要发送附件的文件路径String filename1 = "/Users/aaa/bbb/b.txt";FileDataSource source1 = new FileDataSource(filename1);messageBodyPart1.setDataHandler(new DataHandler(source1));//处理附件名称中文（附带文件路径）乱码问题String filenameEncode1 = MimeUtility.encodeText(filename1, "UTF-8", "base64");messageBodyPart1.setHeader("Content-Transfer-Encoding", "base64");messageBodyPart1.setHeader("Content-Disposition", "attachment");messageBodyPart1.setHeader("Content-Type", "application/octet-stream;name=\\"" + filenameEncode1 + "\\"");multipart.addBodyPart(messageBodyPart1);//发送含有附件的完整消息message.setContent(multipart);//发送附件代码，结束//发送邮件Transport.send(message);} catch (MessagingException | UnsupportedEncodingException e) {String err = e.getMessage();err = new String(err.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8);System.out.println(err);}}}
常见问题
遇到报错：“No appropriate protocol (protocol is disabled or cipher suites are inappropriate)”，如何处理？
找到
jdk/jre/lib/security/java.security 文件进行修改：
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