邮箱设置
首先要开启设置POP3/SMTP/IMAP服务，因为邮件发送都是需要调用这些协议来发送，不论是QQ邮箱或者是网易新浪的邮箱的设置都差不多。
找到设置，在找到POP3/SMTP/IMAP，选择开启：
使用Spring Mail发送邮件
加入依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
<version>2.1.5.RELEASE</version>
</dependency>
添加邮箱参数配置：（根据自己的邮箱自行配置host，用户名，密码）
注意：该处的密码是开启SMTP的授权码而非登录密码
# MailProperties
spring.mail.host=smtp.163.com
spring.mail.port=465
spring.mail.username=xxx@qq.com
spring.mail.password=xxxxxxxx
spring.mail.protocol=smtps
spring.mail.properties.mail.smtp.ssl.enable=true
邮件发送工具类：
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
@Component
public class MailClient {
private static final Logger logger = LoggerFactory.getLogger(MailClient.class);
@Autowired
private JavaMailSender mailSender;
@Value("${spring.mail.username}")
private String from;
public void sendMail(String to, String subject, String content) {
try {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
mailSender.send(helper.getMimeMessage());
} catch (MessagingException e) {
logger.error("发送邮件失败:" + e.getMessage());
}
}
}
测试邮件发送：
import com.nowcoder.community.util.MailClient;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = CommunityApplication.class)
public class MailTests {
@Autowired
private MailClient mailClient;
@Test
public void testTextMail() {
mailClient.sendMail("2609076192@qq.com", "TEST", "Welcome.");
}
}
使用 Thymeleaf 发送 HTML 邮件
这里介绍一下使用模板引擎Thymeleaf发送邮件，使用它的好处就是发送的内容能够动态的生成。
创建一个邮件发送模板放在template目录下：
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>邮件示例</title>
</head>
<body>
<p>欢迎你, <span style="color:red;" th:text="${username}"></span>!</p>
</body>
</html>
测试发送：
注：templateEngine.process()内对应的参数为模板文件的路径，根据此模板文件拿到解析后的字符串
import com.nowcoder.community.util.MailClient;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = CommunityApplication.class)
public class MailTests {
@Autowired
private MailClient mailClient;
@Autowired
private TemplateEngine templateEngine;
@Test
public void testHtmlMail() {
Context context = new Context();
context.setVariable("username", "Chen");
String content = templateEngine.process("/mail/demo", context);
System.out.println(content);
mailClient.sendMail("2609076192@qq.com", "HTML", content);
}
}