1、准备工作
以刚刚创建的SpringBoot项目为主：
以QQ邮箱为例：(其实什么邮箱都差不多)
1.进入qq邮箱设置
2.找到账户
3.往下滑，找到pop3服务，点击开启，需要验证，得到授权码
2、配置代码
1导入依赖
<!-- 发送邮箱所需依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
2.配置配置文件，application.properties（重点）
#host 代表使用什么邮箱, QQ:smtp.qq.com 163:smtp.163.com
#default-encoding 字符集 默认utf-8
#username 邮箱账号
#password 第一步的授权码
spring.mail.host=smtp.qq.com
spring.mail.default-encoding=utf-8
spring.mail.username=xxxx
spring.mail.password=xxxx
username是填写邮箱账号
password不是填写密码，是填写第一步的授权码
3.创建发送邮件实现类接口（重点）
复制进去导入包即可
package com.lj.demo.mail;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMailMessage;
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;
import java.io.File;
@Component
public class MailServiceImpl {
@Autowired
private JavaMailSender mailSender;
@Value("${spring.mail.username}")
private String from;
/**
* 发送普通文本邮件
*/
public void sendSimpleMail(String to, String subject, String content) throws MailException {
SimpleMailMessage message = new SimpleMailMessage();
message.setFrom(from); // 邮件发送者
message.setTo(to); // 邮件接受者
message.setSubject(subject); // 主题
message.setText(content); // 内容
mailSender.send(message);
}
/**
* 发送带图片邮件邮件
*/
public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId) throws MessagingException {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
File file = new File(rscPath);
FileSystemResource res = new FileSystemResource(file);
helper.addInline(rscId, res);
mailSender.send(message);
}
/**
* 发送HTML邮件
*/
public void sendHtmlMail(String to, String subject, String content) throws MessagingException {
MimeMessage message = mailSender.createMimeMessage();
//true 表⽰示需要创建⼀一个 multipart message
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
mailSender.send(message);
}
/**
* 发送带附件的邮件
*/
public void sendAttachmentsMail(String to, String subject, String content, String filePath) throws MessagingException {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
FileSystemResource file = new FileSystemResource(new File(filePath));
String fileName = file.getFilename();
helper.addAttachment(fileName, file);
mailSender.send(message);
}
}
接下来我们测试，在测试类中进行测试，实际开发模仿我的示例
package com.lj.demo;
import com.lj.demo.mail.MailServiceImpl;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.mail.MailException;
import javax.mail.MessagingException;
@SpringBootTest
class DemoApplicationTests {
@Autowired
MailServiceImpl mailService;
/**
* 普通文本邮件测试
*
* @throws Exception
*/
@Test
public void test() throws Exception {
String to = "邮件名@qq.com";
String subject = "主题";
String content = "内容";
try {
mailService.sendSimpleMail(to, subject, content);
System.out.println("成功了");
} catch (MailException e) {
System.out.println("失败了");
e.printStackTrace();
}
}
/**
* 带图片的邮件测试
*/
@Test
public void test1() {
String to = "邮件名@163.com";
String subject = "主题";
String rscId = "img";
String content = "<html><body><img width='250px' src=\'cid:" + rscId + "\'></body></html>";
// 此处为电脑系统路径
String imgPath = "C:\\Users\\Administrator\\Desktop\\0f819bedc81e4447a79ebc0207a5704e.png";
try {
mailService.sendInlineResourceMail(to, subject, content, imgPath, rscId);
System.out.println("成功了");
} catch (MessagingException e) {
System.out.println("失败了");
e.printStackTrace();
}
}
/**
* 带HTML邮件测试
*/
@Test
public void test2() {
String to = "邮件名@qq.com";
String subject = "主题";
String content = "<html><head></head><body><h3>哈哈，什么都没有</h3></body></html>";
try {
mailService.sendHtmlMail(to, subject, content);
System.out.println("成功了");
} catch (MessagingException e) {
System.out.println("失败了");
e.printStackTrace();
}
}
/**
* 带附件的邮件测试
*/
@Test
public void test3() {
String to = "邮件名@163.com";
String subject = "附件的邮件";
String content = "内容";
String imgPath = "C:\\Users\\Administrator\\Desktop\\0f819bedc81e4447a79ebc0207a5704e.png";
try {
mailService.sendAttachmentsMail(to, subject, content, imgPath);
System.out.println("成功了");
} catch (MessagingException e) {
System.out.println("失败了");
e.printStackTrace();
}
}
}
填写好接收的邮箱，全部测试
完成
有可能您还需要
SpringBoot发送短信验证码：https://blog.csdn.net/weixin_43122090/article/details/103555621
Java代码生成二维码：https://blog.csdn.net/weixin_43122090/article/details/103524097
如果需要邮箱发送二维码，可参考我Java代码生成二维码配合此文章可实现
