SpringBoot整合freemarker、email实现邮件发送

清疚 2023-10-03 20:27 37阅读 0赞

### 准备 ###

进入qq邮箱，进行如下操作：  
![在这里插入图片描述][9c857149b4a842daa2a9ed6aefeb3e45.png]  
![在这里插入图片描述][86815766117049c3b873a21b64fd7f41.png]

![在这里插入图片描述][2f4d6f995c3544728678ad7c891156cf.png]  
![在这里插入图片描述][f7cfd6cb45ba4d988fd6810707047d5d.png]

### Do ###

第一步：引入依赖

<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>

第二步：配置

#配置Freemarker
    # 是否开启Freemarker缓存,本地为false，生产建议为true
    spring.freemarker.cache=false
    spring.freemarker.charset=UTF-8
    spring.freemarker.allow-request-override=false
    spring.freemarker.check-template-location=true
    #类型
    spring.freemarker.content-type=text/html
    spring.freemarker.expose-request-attributes=true
    spring.freemarker.expose-session-attributes=true
    #文件后缀
    spring.freemarker.suffix=.ftl
    #路径
    spring.freemarker.template-loader-path=classpath:/templates/
    
    #MailProperties
    spring.mail.host=smtp.qq.com
    spring.mail.port=465
    spring.mail.username=****@qq.com
    spring.mail.password=*****
    spring.mail.protocol=smtps
    spring.mail.properties.mail.smtp.ssl.enable=true

**注意：spring.mail.password是开启QQ邮箱SMTP服务时的授权码，不是你的账号密码！！**

第三步：写一个MailClient工具类

package com.activate.module.cpsp.util;
    
    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;
    
    
    
    /**
     * @Auther:
     * @Date:
     * @Description: 邮件发送客户端
     */
    
    @Component
    public class MailClient {
        
    
        private static final Logger logger = LoggerFactory.getLogger(MailClient.class);
    
        @Autowired
        private JavaMailSender mailSender;
    
        @Value("${spring.mail.username}")
        private String from;
    
        /**
         * 发送邮件
         * @param to 收件人
         * @param subject 邮件主题
         * @param content 邮件内容
         */
        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);
                // 邮件内容,第二个参数true表示支持html格式
                helper.setText(content,true);
    
                mailSender.send(helper.getMimeMessage());
            } catch (MessagingException e) {
        
                logger.error("发送邮件失败: " + e.getMessage());
            }
        }
    }

第五步：准备一个文件模板  
![在这里插入图片描述][e54ff7ef3cb9432b8cf7e3af028791dc.png]

<!DOCTYPE html>
    <html>
    <head><meta http-equiv=Content-Type content="text/html; charset=utf-8"/></head>
    <div style=font-family: Arial>Dear Mr./Ms. ${
        username},</br>
      以下为最近7天内即将到期关闭的任务,请及时关注，谢谢
    </div><br>
    <#list rows>
    <table style=font-size:12px border=1 cellspacing=0 width=100%  bordercolorlight=DarkGray bordercolordark=#efefef>
    <tr><th>代码</th><th>任务名称</th><th>到期日期</th><th>剩余天数</th></tr>
    <#items as row>
        <tr>
            <td>${
        row.id}</td>
            <td>${
        row.name}</td>
            <td>${
        row.expirydate}</td>
            <td>${
        row.surplus}</td>
        </tr>
    </#items>
    </table>
    </#list>
    <br>
    
    <div align="right"   style="font-size: 11pt;line-height:2em;" >
          <strong>IT</strong><br/>
         If you have any IT related questions, please send your request to
        <a href='http://www.baidu.com'>Baidu.</a><br/>
        <script> var day=new Date();document.write (day.toString());</script>
    </div>
    </html>

第六步：写一个测试类验证

import freemarker.template.Configuration;
    import freemarker.template.Template;
    import org.junit.jupiter.api.DisplayName;
    import org.junit.jupiter.api.Test;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.mail.javamail.JavaMailSender;
    import org.springframework.mail.javamail.MimeMessageHelper;
    import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
    
    import javax.mail.internet.MimeMessage;
    import java.util.*;
    
    @SpringBootTest
    public class FreeMarkerTest {
        
    
        // 自动注入FreeMarker配置类,用户获取模板
        @Autowired
        private Configuration configuration;
    
        // 注入Spring发送邮件的工具类
        @Autowired
        private JavaMailSender sender;
    
    
        @Test
        @DisplayName("测试freemarker")
        public void test() throws Exception{
        
            // 定义个数据根节点
            Map<String,Object> root = new HashMap<>();
            // 往里面塞第一层节点
            root.put("UserName","xiaoming");
    
            String[] temp = new String[]{
        "dog","cat","tiger"};
            List<String> pets = new ArrayList<>();
            Collections.addAll(pets,temp);
            // 往里面塞个List对象
            root.put("pets", pets);
    
            Template template = configuration.getTemplate("helloworld.ftl");
            String s = FreeMarkerTemplateUtils.processTemplateIntoString(template, root);
            System.out.println("--->"+s);
    
            MimeMessage mimeMessage = sender.createMimeMessage();
            /** 设置邮件重要性级别 */
            mimeMessage.setHeader("Importance","High");
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
            helper.setFrom("Intranet.FM@test.com","personalTest");
            helper.setTo("Zhangsan@test.com");
            helper.setSubject("This is subject 主题");
            helper.setText(s,true);
            sender.send(mimeMessage);
        }
    
        @Test
        @DisplayName("测试邮件模板")
        public void testMailFreeMark() throws Exception{
        
            List<Map<String, String>> rows = new ArrayList<>();
            Map<String, String> map = new HashMap<>();
            map.put("id","314016163491");
            map.put("name","小白");
            map.put("expirydate","2021-04-21");
            map.put("surplus","61");
            Map<String, String> map2 = new HashMap<>();
            map2.put("id","31400000024");
            map2.put("name","小黑");
            map2.put("expirydate","2021-04-22");
            map2.put("surplus","2");
            rows.add(map);rows.add(map2);
            // 定义个数据根节点
            Map<String,Object> root = new HashMap<>();
            root.put("username","zhangsan");
            root.put("rows",rows);
            Template template = configuration.getTemplate("mailtest.ftl");
            String s = FreeMarkerTemplateUtils.processTemplateIntoString(template, root);
            System.out.println("--->"+s);
        }
    
    }

邮件效果：  
![在这里插入图片描述][4a5e0c9bfa2f42c4b7da9a51f5568966.png]

[9c857149b4a842daa2a9ed6aefeb3e45.png]: https://img-blog.csdnimg.cn/9c857149b4a842daa2a9ed6aefeb3e45.png
[86815766117049c3b873a21b64fd7f41.png]: https://img-blog.csdnimg.cn/86815766117049c3b873a21b64fd7f41.png
[2f4d6f995c3544728678ad7c891156cf.png]: https://img-blog.csdnimg.cn/2f4d6f995c3544728678ad7c891156cf.png
[f7cfd6cb45ba4d988fd6810707047d5d.png]: https://img-blog.csdnimg.cn/f7cfd6cb45ba4d988fd6810707047d5d.png
[e54ff7ef3cb9432b8cf7e3af028791dc.png]: https://img-blog.csdnimg.cn/e54ff7ef3cb9432b8cf7e3af028791dc.png
[4a5e0c9bfa2f42c4b7da9a51f5568966.png]: https://img-blog.csdnimg.cn/4a5e0c9bfa2f42c4b7da9a51f5568966.png