springboot 框架项目持续更新 （五）——发送模板邮件

1.加入pom文件

<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>

2.修改application.properties文件

# JavaMailSender 邮件发送的配置
#spring.mail.host=smtp.163.com
#163 有点坑 会有554错误
spring.mail.host=smtp.qq.com
#你的邮箱
spring.mail.username=****@qq.com#
#要通过申请开通（进入qq邮箱-》设置-》账户-》POP3服务：开启POP3/SMTP服务）
spring.mail.password=dzagtxicxzurbgia

spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true
#模板引擎配置
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false

3.编写MailUtil类

package com.basewin.tms.servlet;

import freemarker.template.Template;
import freemarker.template.TemplateException;
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 org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;

import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.io.IOException;
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.HashMap;
import java.util.Map;

@Component
public class MailUtil {

    //邮件的发送者
    @Value("${spring.mail.username}")
    private String from;

    //注入MailSender
    @Autowired
    private JavaMailSender mailSender;

    //发送邮件的模板引擎
    @Autowired
    private FreeMarkerConfigurer configurer;

    /**
     * @param params       发送邮件的主题对象 object
     * @param title        邮件标题
     * @param templateName 模板名称
     */
    public void sendMessageMail(Object params, String title, String templateName, String user) {

        try {

            MimeMessage mimeMessage = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
            helper.setFrom(from);
            helper.setTo(InternetAddress.parse(user));//发送给谁
            helper.setSubject("【" + title + "-" + LocalDate.now() + " " + LocalTime.now().withNano(0) + "】");//邮件标题

            Map<String, Object> model = new HashMap<>();
            model.put("params", params);
            try {
                Template template = configurer.getConfiguration().getTemplate(templateName);
                try {
                    String text = FreeMarkerTemplateUtils.processTemplateIntoString(template, model);

                    helper.setText(text, true);
                    mailSender.send(mimeMessage);
                } catch (TemplateException e) {
                    e.printStackTrace();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

4.编写MailController类

package com.basewin.tms.controller;


import com.basewin.tms.entity.MailMessage;
import com.basewin.tms.servlet.MailUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MailController {

    @Autowired
    private MailUtil mailUtil;
    @GetMapping("/send")
    public String send(String test){
     
        MailMessage message = new MailMessage();

        message.setMessageCode("七夕主题");
        message.setMessageStatus("啪啪啪活动");
        message.setCause(test);

        mailUtil.sendMessageMail(message, "测试消息通知", "email.ftl","*****@qq.com");
        return "1";
    }
}

5.编辑模板

在resources文件下创建templates文件夹，加入文件email.ft，内容为：

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>消息通知</title>
</head>

<style type="text/css">
    table {
        font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
        width: 100%;
        border-collapse: collapse;
    }

    td, th {
        font-size: 1em;
        border: 1px solid #5B4A42;
        padding: 3px 7px 2px 7px;
    }

    th {
        font-size: 1.1em;
        text-align: center;
        padding-top: 5px;
        padding-bottom: 4px;
        background-color: #24A9E1;
        color: #ffffff;
    }
</style>
<body>
<div>
    <h2>邮件消息通知</h2>
    <table id="customers">
        <tr>
            <th>主题</th>
            <th>介绍</th>
            <th>内容</th>
        </tr>
        <tr>
            <td>${(params.messageCode)!""}</td>
            <td>${(params.messageStatus)!""}</td>
            <td>${(params.cause)!""}</td>
        </tr>
    </table>
</div>
</body>
</html>

6.效果

请求http://localhost:8081/send?test=***