1. Spring整合JavaMail
1.1. 添加依赖
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>5.3.2</version> </dependency> <dependency> <groupId>javax.activation</groupId> <artifactId>activation</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>com.sun.mail</groupId> <artifactId>javax.mail</artifactId> <version>1.6.2</version> </dependency>
1.2. spring配置
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl"> <property name="host" value="smtp.qq.com" /> <property name="username" value="自己的邮箱1025205118@qq.com" /> <property name="password" value="自己的授权码" /> <property name="javaMailProperties"> <props> <!-- 授权认证，防止乱发邮件 --> <prop key="mail.smtp.auth">true</prop> <!-- SMTP加密方式，连接到一个TLS保护连接 --> <prop key="mail.smtp.starttls.enable">true</prop> <!-- 设置邮件发送超时时间 --> <prop key="mail.smtp.timeout">25000</prop><!-- <prop key="mail.smtp.ssl.enable">true</prop>--> </props> </property> </bean> <context:component-scan base-package="com.wanmait.mavendemo.mail"/>
1.3. 使用SimpleMailMessage发送邮件
JavaMail的集成API是在spring-context-support的 org.springframework.mail 包中，需要 JavaMail 的类库支持。MailSender 是发送电子邮件的核心接口，spring提供了邮件的简单封装类 SimpleMailMessage。
1.3.1. 发送普通邮件
@Component
public class MailUtil {
@Resource
private MailSender mailSender;
public void sendMsg() throws ParseException {
SimpleMailMessage smm = new SimpleMailMessage();
// 发送
smm.setFrom("1025205118@qq.com");
// 接收
smm.setTo("wangrf@qingsoft.net");
// 主题
smm.setSubject("hello world" + System.currentTimeMillis());
//设置抄送
smm.setCc("sunm@qingsoft.net");
//设置密送
//smm.setBcc("sunm@qingsoft.net");
// 内容
smm.setText("hello,how are you !");
//设置邮件显示的发送时间 不设置默认当前系统时间，设置到当前时间之前不会发送
//smm.setSentDate(new Date());
mailSender.send(smm);
}
}
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class MailTest {
@Resource
private MailUtil mailUtil;
@Test
public void testSendMail() throws ParseException {
mailUtil.sendMsg();
}
}1.3.2. 发送统一标题和内容邮件
在spring配置文件中再加上如下配置：
<bean id="templateMessage" class="org.springframework.mail.SimpleMailMessage"> <property name="from" value="1025205118@qq.com"/> <property name="subject" value="统一标题"/> <property name="text" value="统一内容"/> </bean>
发送邮件
@Resource
private SimpleMailMessage simpleMailMessage;
public void sendMsgWithTemplate() throws ParseException {
SimpleMailMessage smm = new SimpleMailMessage(simpleMailMessage);
smm.setTo("wangrf@qingsoft.net");
mailSender.send(smm);
}1.4. 使用MimeMessage发送邮件
spring 框架的邮件支持也附带了标准 JavaMail 实现，JavaMailSender 类可以使用 JavaMail 的 MimeMessage类来发送邮件。
1.4.1. 使用JavaMailSender 和 MimeMessagePreparator
@Resource
private JavaMailSender javaMailSender;
public void sendMimeMsg()
{
String[] tos = {"62999860@qq.com","wangrf@qingsoft.net"};
MimeMessagePreparator preparator = (MimeMessage mimeMessage) ->{
Arrays.asList(tos).stream().forEach(to->{
try {
mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress(to));
} catch (MessagingException e) {
e.printStackTrace();
}
});
mimeMessage.setFrom("1025205118@qq.com");
mimeMessage.setSubject("spring邮件");
String content="hello 你好";
mimeMessage.setContent(content, "text/html;charset=UTF-8");
};
javaMailSender.send(preparator);
}1.4.2. 使用JavaMailSender创建MimeMessage
public void sendMimeMsg2() throws MessagingException {
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress("wangrf@qingsoft.net"));
mimeMessage.setFrom("1025205118@qq.com");
mimeMessage.setSubject("spring邮件111");
String content = "hello 你好";
mimeMessage.setContent(content, "text/html;charset=UTF-8");
javaMailSender.send(mimeMessage);
}1.4.3. 借助MimeMessageHelper处理邮件
public void sendMimeMsg3() throws MessagingException {
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(mimeMessage);
helper.setFrom("1025205118@qq.com");
helper.setTo("wangrf@qingsoft.net");
helper.setCc("62999860@qq.com");
helper.setSubject("hello");
helper.setText("hello，how are you ! ");
javaMailSender.send(mimeMessage);
}
1.4.4. 使用MimeMessageHelper 发送带附件和内联资源的邮件
public void sendMimeMsg4() throws MessagingException {
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
//true表示创建多部分组成带附件的邮件
MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true,"UTF-8");
helper.setFrom("1025205118@qq.com");
helper.setTo("wangrf@qingsoft.net");
helper.setCc("62999860@qq.com");
helper.setSubject("hello");
//true表示邮件内容为HTML
helper.setText("<html><body><h1>邮件内容</h1><p>Hello,how are you !</p><img src=\"cid:inlineImg\"/></body></html>",true);
//添加附件
FileSystemResource resource = new FileSystemResource(new File("d:/log.txt"));
helper.addAttachment("1.txt",resource);
//添加内联资源，设置图片
FileSystemResource imageResource = new FileSystemResource(new File("d:/images/1.jpg"));
helper.addInline("inlineImg",imageResource);
javaMailSender.send(mimeMessage);
}收件箱收到的邮件如下：
1.5. 使用模板创建邮件
一般使用代码创建邮件不会是简单的纯文本邮件，在使用Java代码创建基于HTML的电子邮件内容非常繁琐且容易出错，而且更改电子邮件内容的显示结构需要编写Java代码，重新编译，重新部署
使用模板可以解决这些问题，使用模板库（例如FreeMarker、Velocity、Thymeleaf）来定义电子邮件内容的显示结构。从 Spring 4.3 之后，Velocity支持已被弃用。
下面使用 FreeMaker 模板发送邮件。
1.5.1. 添加依赖
<dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.30</version> </dependency>
1.5.2. 添加配置
<bean id="freeMarkerConfiguration" class="org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean"> <property name="templateLoaderPath" value="classpath:template/ftl/" /> <property name="freemarkerSettings"> <props> <!--模板更新延时--> <prop key="template_update_delay">1800</prop> <prop key="default_encoding">UTF-8</prop> <prop key="locale">zh_CN</prop> </props> </property> </bean>
1.5.3. 邮件模板文件
放在resources下面的template/ftl文件夹下：
<html>
<body>
<h3>${article.title}</h3>
<p>${article.info}</p>
<span>From wanmait.com</span>
</body>
</html>1.5.4. 邮件发送类
@Component
public class TemplateMailManager {
@Resource
private JavaMailSender mailSender;
@Resource
private Configuration freeMarkerConfiguration;
public void sendMail(Article article,String... to) {
MimeMessage message = mailSender.createMimeMessage();
try {
// 使用 true 表示要创建一个有多部分的邮件
MimeMessageHelper helper = new MimeMessageHelper(message, true, "utf-8");
helper.setFrom("1025205118@qq.com");
helper.setTo(to);
helper.setSubject("Freemarker模板邮件");
//获取模板
Map<String, Object> model = new HashMap<String, Object>();
model.put("article", article);
String text = geFreeMarkerTemplateContent(model);
// 使用 true 表示邮件内容为 HTML
helper.setText(text, true);
this.mailSender.send(message);
} catch (MailException | MessagingException ex) {
System.err.println(ex.getMessage());
}
}
//获得模板内容
private String geFreeMarkerTemplateContent(Map<String, Object> model) {
String content = null;
try {
content = FreeMarkerTemplateUtils.processTemplateIntoString(freeMarkerConfiguration.getTemplate("article.ftl"), model);
} catch (Exception e) {
System.err.println(e.getMessage());
}
return content;
}
}1.5.5. 测试发送
@Resource
private TemplateMailManager mailManager;
@RequestMapping("sendMail")
@ResponseBody
public String sendMail()
{
Article article = new Article();
article.setTitle("万码云课已经上线，哈哈");
article.setInfo("JavaEE高端框架，大数据，云计算应有尽有，欢迎观看！");
mailManager.sendMail(article,"wangrf@qingsoft.net","62999860@qq.com");
return "success";
}
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