废话不说直接上代码！！！
pom文件：
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入邮件的starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
MailService：
package com.xieh.mail.service;
import javafx.util.Pair;
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.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
import freemarker.template.Configuration;
import javax.mail.internet.MimeMessage;
import java.io.File;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* @author 谢辉
* @Classname MailService
* @Description TODO
* @Date 2020/11/24 10:08
*/
@Component
public class MailService {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
private JavaMailSender mailSender;
@Value("${spring.mail.username}")
private String sender;
/**
* 用来发送模版邮件
*/
@Autowired
private TemplateEngine templateEngine;
//发送邮件的模板引擎
@Autowired
private FreeMarkerConfigurer configurer;
/**
* 发送简单的邮件
* @param receiver 接收者
* @param subject 主题
* @param context 内容
*/
public void sendSimpleMail(String receiver,String subject, String context){
SimpleMailMessage mailMessage = new SimpleMailMessage();
mailMessage.setFrom(sender);
mailMessage.setTo(receiver);
mailMessage.setSubject(subject);
mailMessage.setText(context);
try {
mailSender.send(mailMessage);
logger.info("简单邮件发送成功!接收者是：" + receiver);
}catch (Exception e){
e.printStackTrace();
logger.error("简单邮件发送失败!");
}
}
/**
* 发送html的邮件
* @param receiver 接收者
* @param subject 主题
* @param context 内容
*/
public void sendHtmlMail(String receiver,String subject, String context){
MimeMessage mimeMailMessage = mailSender.createMimeMessage();
try{
MimeMessageHelper helper = new MimeMessageHelper(mimeMailMessage,true,"UTF-8");
helper.setFrom(sender);
helper.setTo(receiver);
helper.setSubject(subject);
helper.setText(context,true);
mailSender.send(mimeMailMessage);
logger.info("html邮件发送成功！接收者是:" + receiver);
}catch (Exception e){
e.printStackTrace();
logger.error("html邮件发送失败！");
}
}
/**
* 使用Freemarker模板发送邮件
* @param receiver 接收者
* @param subject 主题
* @param params 参数
*/
public void sendFreemarkerTemplateMail(String receiver, String subject, Map<String, Object> params){
MimeMessage mimeMailMessage = mailSender.createMimeMessage();
try{
MimeMessageHelper helper = new MimeMessageHelper(mimeMailMessage,true,"UTF-8");
helper.setFrom(sender);
helper.setTo(receiver);
helper.setSubject(subject);
Configuration configuration = new Configuration(Configuration.VERSION_2_3_28);
//设置编码
configuration.setDefaultEncoding("utf-8");
//ftl模板文件
configuration.setClassForTemplateLoading(this.getClass(), "/static/");
String html = FreeMarkerTemplateUtils.processTemplateIntoString(configuration.getTemplate("mail.ftl"), params);
helper.setText(html, true);//重点，默认为false，显示原始html代码，无效果
mailSender.send(mimeMailMessage);
logger.info("Freemarker邮件发送成功！接收者是:" + receiver);
}catch (Exception e){
e.printStackTrace();
logger.error("Freemarker邮件发送失败！");
}
}
/**
* 使用Thymeleaf模板发送邮件
* @param receiver 接收者
* @param subject 主题
* @param params 参数
*/
public void sendThymeleafTemplateMail(String receiver, String subject, Map<String, Object> params){
MimeMessage mimeMailMessage = mailSender.createMimeMessage();
//创建邮件正文
Context context = new Context();
if(params != null){
Set<Map.Entry<String, Object>> entrySet = params.entrySet();
for (Map.Entry<String, Object> entry : entrySet){
context.setVariable(entry.getKey(),entry.getValue());
}
}
try{
MimeMessageHelper helper = new MimeMessageHelper(mimeMailMessage,true,"UTF-8");
/* context.setVariable("user", "1111");
context.setVariable("web", "tttt");
context.setVariable("company", "我是一个公司");
context.setVariable("product","我是一个产品");*/
helper.setFrom(sender);
helper.setTo(receiver);
helper.setSubject(subject);
// 这里是去找（resources的）templates目录下的mail目录下的mail.html文件
// String emailContent = templateEngine.process("/mail/mail",context); //指定模板路径
// 这里是去找（resources的）templates目录下的emailTemplate.html文件
String emailContent = templateEngine.process("emailTemplate", context);
helper.setText(emailContent,true);
mailSender.send(mimeMailMessage);
logger.info("Thymeleaf邮件发送成功！接收者是:" + receiver);
}catch (Exception e){
e.printStackTrace();
logger.error("Thymeleaf邮件发送失败！");
}
}
/**
* 发送带附件的邮件
* @param receiver 接收者
* @param subject 主题
* @param context 内容
* @param attachments 附件
*/
public void sendAttachmentsMail(String receiver, String subject, String context, List<Pair<String, File>> attachments) {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = null;
try {
helper = new MimeMessageHelper(message, true,"UTF-8");
helper.setFrom(sender);
helper.setTo(receiver);
helper.setSubject(subject);
helper.setText(context, true);
if(attachments != null){
for(Pair<String,File> attachment:attachments){
FileSystemResource file = new FileSystemResource(attachment.getValue());
helper.addAttachment(attachment.getKey(), file);
}
}
mailSender.send(message);
logger.info("附件邮件发送成功！接收者是:" + receiver);
} catch (Exception e) {
e.printStackTrace();
logger.info("附件邮件发送失败！");
}
}
}
效果图：
