使用spring自带的JavaMailSenderImpl实现邮件发送

使用普通的maven项目需要加入spring-context-support依赖，因为JavaMailSenderImpl类在这个包下面：
如果使用springboot项目的话，需要在pom.xml中加入spring-boot-starter-mail依赖，本例中使用的是普通的maven项目来实现的。
下面附上相关配置和代码

在web模块的src/main/resources目录下新建mailConfig.properties，内容如下：

#服务器
mailHost=smtp.qq.com
#端口号
mailPort=465
#邮箱账号
[email protected]
#邮箱授权码
mailPassword=sbbpehnbtneuecfc
#时间延迟
mailTimeout=25000
#发送人
[email protected]

新建mailConfig类读取配置

package com.eshore.mindc.aifile.util.mail;

import org.springframework.stereotype.Component;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

@Component
public class MailConfig {
    private static final String PROPERTIES_DEFAULT = "mailConfig.properties";
    public static String host;
    public static Integer port;
    public static String userName;
    public static String passWord;
    public static String emailForm;
    public static String timeout;
    public static String personal;
    public static Properties properties;
    static{
        init();
    }

    /**
     * 初始化
     */
    private static void init() {
        properties = new Properties();
        try{
            InputStream inputStream = MailConfig.class.getClassLoader().getResourceAsStream(PROPERTIES_DEFAULT);
            properties.load(inputStream);
            inputStream.close();
            //properties.setProperty("mailFrom","[email protected]");
            host = properties.getProperty("mailHost");
            port = Integer.parseInt(properties.getProperty("mailPort"));
            userName = properties.getProperty("mailUsername");
            passWord = properties.getProperty("mailPassword");
            emailForm = properties.getProperty("mailFrom");
            timeout = properties.getProperty("mailTimeout");
            personal = "墨裔";
        } catch(IOException e){
            e.printStackTrace();
        }
    }
}

编写发送邮件接口的工具类MailUtil

package com.eshore.mindc.aifile.util.mail;

import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.Properties;


@Component
public class MailUtil {
    private static final String HOST = MailConfig.host;
    private static final Integer PORT = MailConfig.port;
    private static final String USERNAME = MailConfig.userName;
    private static final String PASSWORD = MailConfig.passWord;
    private static final String emailForm = MailConfig.emailForm;
    private static final String timeout = MailConfig.timeout;
    private static final String personal = MailConfig.personal;
    private static JavaMailSenderImpl mailSender = createMailSender();

    /**
     * 邮件发送器
     *
     * @return 配置好的工具
     */
    private static JavaMailSenderImpl createMailSender() {
        JavaMailSenderImpl sender = new JavaMailSenderImpl();
        sender.setHost(HOST);
        sender.setPort(PORT);
        sender.setUsername(USERNAME);
        sender.setPassword(PASSWORD);
        sender.setDefaultEncoding("Utf-8");
        Properties p = new Properties();
        p.setProperty("mail.smtp.timeout", timeout);
        p.setProperty("mail.smtp.auth", "false");
        p.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        sender.setJavaMailProperties(p);
        return sender;
    }

    /**
     * 发送邮件
     *
     * @param to      接受人
     * @param subject 主题
     * @param html    发送内容
     * @throws MessagingException           异常
     * @throws UnsupportedEncodingException 异常
     */
    public static void sendMail(String to, String subject, String html) throws MessagingException, UnsupportedEncodingException {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        // 设置utf-8或GBK编码，否则邮件会有乱码
        MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
        messageHelper.setFrom(emailForm, personal);
        messageHelper.setTo(to);
        messageHelper.setSubject(subject);
        messageHelper.setText(html, true);
        mailSender.send(mimeMessage);
    }

    /**
     * 发送带附件的邮件
     *
     * @param to      接受人
     * @param subject 主题
     * @param html    发送内容
     * @param filePath  附件路径
     * @throws MessagingException           异常
     * @throws UnsupportedEncodingException 异常
     */
    public static void sendAttachmentMail(String to, String subject, String html, String filePath) throws MessagingException, UnsupportedEncodingException {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        // 设置utf-8或GBK编码，否则邮件会有乱码
        MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
        messageHelper.setFrom(emailForm, personal);
        messageHelper.setTo(to);
        messageHelper.setSubject(subject);
        messageHelper.setText(html, true);
        FileSystemResource file=new FileSystemResource(new File(filePath));
        String fileName=filePath.substring(filePath.lastIndexOf(File.separator));
        messageHelper.addAttachment(fileName,file);
        mailSender.send(mimeMessage);
    }
}

编写MailController层作为入口调用

package com.eshore.mindc.aifile.controller.mail;

import com.eshore.mindc.aifile.util.mail.MailUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.mail.MessagingException;
import javax.mail.internet.AddressException;
import java.io.UnsupportedEncodingException;

@Controller
public class MailController {

    @Autowired
    private MailUtil mailUtil;

    /**
     * 发送邮件
     */
    @RequestMapping("/email")
    public void sendMail() {
        String emailMsg = "测试发送邮件";
        try {
            // 发送普通文本邮件
            mailUtil.sendMail("[email protected]", "邮件发送测试", "<a href='https://www.baidu.com' >百度一下</a>");
            // 发送带附件的邮件
            mailUtil.sendAttachmentMail("[email protected]", "邮件发送测试", "<a href='https://www.baidu.com' >百度一下</a>", "D:\\my_resources\\company_relate\\MobileFile\\IMG_2052.JPG");
        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}

发送成功后的效果如下：

使用spring自带的JavaMailSenderImpl实现邮件发送

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