java发送html模板的高逼格邮件

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更新时间：2025-10-05 06:09:2159

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java发送html模板的高逼格邮件

最近做了一个监测k8s服务pod水平伸缩发送html style="color:#2aa0ea" target=_blank class=infotextkey>邮件的功能（当pod的cpu/内存达到指定阈值后会水平扩展出多个pod、或者指定时间内pod数应扩展到指定数量），一开始写了个格式很low的邮件，像下面这样：

主流程打通，算个v1版本吧，程序员是个追求完美的人，再说这么低逼格的邮件，给客户看，客户也会不满意。那怎么提高邮件的逼格呢？下面写了个简单的demo，v2版本如下：

感兴趣的小伙伴可以参考，模板可以找你公司前端和美工小姐姐设计。

因为监测k8s服务pod水平伸缩是用go开发的，发送通知邮件提供了个接口，用springboot写的，以下也用springboot做demo

Springboot的pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="maven.apache/POM/4.0.0" xmlns:xsi="www.w3/2001/XMLSchema-instance" xsi:schemaLocation="maven.apache/POM/4.0.0 maven.apache/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.2.RELEASE</version> <relativePath/>  </parent> <groupId>com.example</groupId> <artifactId>email-demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>email-demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.apachemons</groupId> <artifactId>commons-lang3</artifactId> <version>3.8.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.47</version> </dependency>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

pod-scale-alarm.html模板文件：模板中的{0}、{1}这样的占位符后面java代码会替换掉

<body style="color: #666; font-size: 14px; font-family: 'Open Sans',Helvetica,Arial,sans-serif;"> <div class="box-content" style="width: 80%; margin: 20px auto; max-width: 800px; min-width: 600px;"> <div class="header-tip" style="font-size: 12px; color: #aaa; text-align: right; padding-right: 25px; padding-bottom: 10px;"> Confidential - Scale Alarm Use Only </div> <div class="info-top" style="padding: 15px 25px; border-top-left-radius: 10px; border-top-right-radius: 10px; background: {0}; color: #fff; overflow: hidden; line-height: 32px;"> <img src="cid:icon-alarm" style="float: left; margin: 0 10px 0 0; width: 32px;" /><div style="color:#010e07"><strong>服务实例水平伸缩通知</strong></div> </div> <div class="info-wrap" style="border-bottom-left-radius: 10px; border-bottom-right-radius: 10px; border:1px solid #ddd; overflow: hidden; padding: 15px 15px 20px;"> <div class="tips" style="padding:15px;"> <p style=" list-style: 160%; margin: 10px 0;">Hi,</p> <p style=" list-style: 160%; margin: 10px 0;">{1}</p> </div> <div class="time" style="text-align: right; color: #999; padding: 0 15px 15px;">{2}</div> <br> <table class="list" style="width: 100%; border-collapse: collapse; border-top:1px solid #eee; font-size:12px;"> <thead> <tr style=" background: #fafafa; color: #333; border-bottom: 1px solid #eee;"> {3} </tr> </thead> <tbody> {4} </tbody> </table> </div> </div> </body>

success-alarm.png图标： java代码如下，简单的demo，优化可以自己在项目中去做。

package com.example.emaildemo; import org.apachemons.lang3.time.DateFormatUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.core.io.ClassPathResource; import org.springframework.mail.javamail.JavaMailSenderImpl; import org.springframework.mail.javamail.MimeMessageHelper; import javax.mail.MessagingException; import javax.mail.internet.MimeMessage; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.text.MessageFormat; import java.util.Date; import java.util.Objects; import java.util.Properties; /** * @program: email-demo * @description: * @author: smallsoup * @create: 2019-01-27 16:44 **/ public class SendEmailUtil { private static final Logger LOGGER = LoggerFactory.getLogger(SendEmailUtil.class); public static void main(String[] args) throws MessagingException, IOException { JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl(); javaMailSender.setUsername("你的邮箱地址"); javaMailSender.setPassword("你的邮箱AUTH密码,不是登陆密码哦,在邮箱的设置里单独开启和设置"); javaMailSender.setHost("smtp.exmail.qq"); javaMailSender.setPort(587); javaMailSender.setDefaultEncoding("UTF-8"); Properties props = new Properties(); props.setProperty("mail.smtp.host", "smtp.exmail.qq"); props.setProperty("mail.transport.protocol", "smtp"); props.setProperty("mail.smtp.auth", "true"); props.setProperty("mail.smtp.connectiontimeout", "20000"); props.setProperty("mail.smtp.timeout", "20000"); javaMailSender.setJavaMailProperties(props); MimeMessage message = javaMailSender.createMimeMessage(); MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8"); helper.setTo(new String[]{"收件人邮箱"}); helper.setCc("抄送人邮箱"); helper.setFrom("你的邮箱地址"); helper.setSubject("liang subject"); helper.setText(buildContent(), true); String alarmIconName = "success-alarm.png"; ClassPathResource img = new ClassPathResource(alarmIconName); if (Objects.nonNull(img)) { helper.addInline("icon-alarm", img); } javaMailSender.send(message); } private static String buildContent() throws IOException { //加载邮件html模板 String fileName = "pod-scale-alarm.html"; InputStream inputStream = ClassLoader.getSystemResourceAsStream(fileName); BufferedReader fileReader = new BufferedReader(new InputStreamReader(inputStream)); StringBuffer buffer = new StringBuffer(); String line = ""; try { while ((line = fileReader.readLine()) != null) { buffer.append(line); } } catch (Exception e) { LOGGER.error("读取文件失败，fileName:{}", fileName, e); } finally { inputStream.close(); fileReader.close(); } String contentText = "以下是服务实例伸缩信, 敬请查看.<br>below is the information of service instance scale, please check. "; //邮件表格header String header = "<td>分区(Namespace)</td><td>服务(Service)</td><td>伸缩结果(Scale Result)</td><td>伸缩原因(Scale Reason)</td><td>当前实例数(Pod instance number)</td>"; StringBuilder linesBuffer = new StringBuilder(); linesBuffer.append("<tr><td>" + "myNamespace" + "</td><td>" + "myServiceName" + "</td><td>" + "myscaleResult" + "</td>" + "<td>" + "mReason" + "</td><td>" + "my4" + "</td></tr>"); //绿色 String emailHeadColor = "#10fa81"; String date = DateFormatUtils.format(new Date(), "yyyy/MM/dd HH:mm:ss"); //填充html模板中的五个参数 String htmlText = MessageFormat.format(buffer.toString(), emailHeadColor, contentText, date, header, linesBuffer.toString()); //改变表格样式 htmlText = htmlText.replaceAll("<td>", "<td style=\\"padding:6px 10px; line-height: 150%;\\">"); htmlText = htmlText.replaceAll("<tr>", "<tr style=\\"border-bottom: 1px solid #eee; color:#666;\\">"); return htmlText; } }

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作者：小碗汤，一位热爱、认真写作的小伙，目前维护原创公众号：『我的小碗汤』，专注于写golang、docker、kubernetes等知识等提升硬实力的文章，期待你的关注。转载说明：务必注明来源（注明：来源于公众号：我的小碗汤，作者：小碗汤）

本文标签：模板邮件 java html 高逼格

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