# 整合邮件发送

简单记录下如何使用Java程序发送邮件

# 邮箱准备

准备好一个已经开通SMTP服务的邮箱

这里我使用的是新浪邮箱，其他类型的邮箱应该也可以，可以去尝试一下哦

登录进来新浪邮箱后，进入邮箱设置，然后选择

开通smtp服务，然后会得到一个授权码,先把它记下来，后面要用到。

# 发送邮件

创建一个springboot项目，然后在pom.xml里导入spring Email的依赖

	<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mail</artifactId>
        <version>2.5.6</version>
    </dependency>

在application.yml中进行参数的配置,要特别注意，配置参数里面的password不是你邮箱密码，而是授权码

使用JavaMailSender发送邮件

package com.lys.community.utils;

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;

@Component
public class MailClient {
    private static final Logger logger = LoggerFactory.getLogger(MailClient.class);

    @Autowired
    private JavaMailSender mailSender;

    @Value("${spring.mail.username}")
    private String from;

    /**
     * 封装邮件发送
     * @param to 邮件接收者
     * @param subject  主题
     * @param content   内容
     */
    public void sendMail(String to, String subject, String content) {
        MimeMessage message = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message);
        try {
            helper.setFrom(from);
            helper.setTo(to);
            helper.setText(content, true);
            helper.setSubject(subject);
            mailSender.send(helper.getMimeMessage());
        } catch (MessagingException e) {
            System.out.println("发送邮件失败");
            e.printStackTrace();
        }
    }
}

测试

package com.lys.community;

import com.lys.community.utils.MailClient;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class MailTest {
    @Autowired
    private MailClient mailClient;
    @Test
    public void test1() {
        mailClient.sendMail("*****@qq.com", "问候","你好啊");
    }
}

运行上面的测试类

这样就能接收到邮件了

# 利用thymeleaf发送html邮件

准备一个html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>这是一个邮件内容模板</title>
</head>
<body>
    <p>很高兴认识你!
        <span style="color: #3a8ee6" th:text="${name}"></span>
    </p>
</body>
</html>

测试

package com.lys.community;

import com.lys.community.utils.MailClient;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

@SpringBootTest
public class MailTest {
    @Autowired
    private MailClient mailClient;
   
    @Autowired
    private TemplateEngine templateEngine;

    @Test
    public void testSend(){
        Context context = new Context();
        context.setVariable("name", "小明");
        String content = templateEngine.process("/mail", context);
        System.out.println(content);
        mailClient.sendMail("1761724207@qq.com", "测试", content);
    }
}

结果

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