springboot集成javaMail发送邮件

背景：

boss想做一个数据库定时查询，如果查询出异常结果就将异常信息都发送到指定邮箱中，于是用到了javaMail，下面就是利用springboot整合javaMail实现该需求。（为了能让大家更快的完成javaMail的集成，后续的集成步骤中有关db操作均跳过）

相关源码下载

• springboot+javaMail集成后项目源码[推荐]

集成步骤：

• 1 设置邮箱smtp服务器，并记录开启服务的授权密码，此部分操作不做赘述，大家可以参考开启邮箱的smtp服务器（以163邮箱为例）进行操作

• 2 新建springboot项目，添加web、thymeleaf、javaMail依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.dhcc</groupId>
    <artifactId>mail_demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>mail_demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <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>

        <!--Thymeleaf-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!--javaMail-->
        <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>

• 3 项目配置
  在application.properties中进行如下配置

server.port=9888

#javaMail配置（下面的 spring.mail.host 为发送邮箱的邮箱服务器）
spring.mail.host=smtp.163.com
spring.mail.username=xxx@163.com
spring.mail.password=password
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

ps：上面提到的spring.mail.host为发送邮箱的邮箱服务器

• 4 编写发送邮件的工具类SendMail

public class SendMail {
    //发送普通文本格式邮件
    public static void sendTextMail(MimeMessage message,String username,String recipient,String subject,List<String> content){
        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(username);
            helper.setTo(recipient);
            helper.setSubject(subject);
            StringBuffer sb = new StringBuffer();
            sb.append(content);
            helper.setText(sb.toString());
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }

    //发送html格式邮件
    public void sendHtmlMail(MimeMessage message,String username,String recipient, String subject, String content) {
        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(username);
            helper.setTo(recipient);
            helper.setSubject(subject);
            helper.setText(content, true);
            System.out.println("html格式邮件发送中...");
        } catch (MessagingException e) {
            System.out.println("html格式邮件发送失败！");
        }
    }
}
}

• 5 编写service层，调用发送邮件方法

public interface MailService {
    /**
     * @Author: hobbes
     * @Description: 获得错误领导项目，并发送提示邮件
     * @Date: 创建于 11:53 2018/2/12 0012
     * @Param:
     * @return
     */
    String checkProject();
}

@Service
public class MailServiceImpl implements MailService {
    
    @Autowired
    private JavaMailSender javaMailSender;

    @Override
    public String checkProject(){
        try {
            SendMail sendMail = new SendMail();
            MimeMessage message = javaMailSender.createMimeMessage();
            String content = "<html><head><style>td{border:solid #add9c0; border-width:0px 1px 1px 0px; padding:10px 0px;} table{border:solid #add9c0; border-width:1px 0px 0px 1px;}</style></head><body style=''><h3>截止 " + format.format(new Date()) + " 业绩核算系统中错误领导项目，项目信息如下：</h3>" +
                    "<table><tr><th>合同号</th><th>项目名称</th><th>客户名称</th><th>合同总金额(元)</th><th>合同实收款(元)</th><th>签订日期</th><th>项目所属领导</th><th>提交人</th></tr>" +
                    "<tr><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td></tr>" +
                    "</table></body></html>";
            sendMail.sendHtmlMail(message, "邮件发送者邮箱", "邮件接收者邮箱", "邮件标题", content);
            javaMailSender.send(message);
        }catch(Exception e){
            //跳转至邮件发送失败页面
            return "CheckError";
        }
        //跳转至邮件发送成功页面
        return "CheckSuccess";
    }
}

ps：此处只给出了调用发送html格式邮件的方法，普通文本格式邮件的调用更简单，可以对照着写

• 6 controller层调用发送邮件的service

@Controller
@RequestMapping("/mail")
public class MailController {
    @Autowired
    private JavaMailSender javaMailSender;
    @Autowired
    private MailService mailService;

    @RequestMapping("/checkProject")
    public String checkProject(){
        return mailService.checkProject();
    }

}

• 7 启动项目，访问localhost:9888/mail/checkProject

  
  运行成功.png

总结：

springboot和javaMail的集成很简单，主要就是获得发送者邮箱的smtp服务器地址和授权密码，做配置之后，调用自己手动封装好的发送邮件方法即可。