SpringBoot开发中mail中文附件乱码如何解决

小鱼儿 2022-04-18 04:30 636阅读 0赞

[https://baijiahao.baidu.com/s?id=1579662074536298902&wfr=spider&for=pc][https_baijiahao.baidu.com_s_id_1579662074536298902_wfr_spider_for_pc]

未知原因仍然无法解决附件名称改变的问题，

由于使用的springBoot在配置文件中配置了![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NDUwMDg5_size_16_color_FFFFFF_t_70][]

在这里 账号密码用了读取配置的方法

oldSendMail方法为寻找到的原型，

sendMail为修改后的方法

package com.qgil.ums.com.utils;
    
    import java.security.GeneralSecurityException;
    import java.util.Properties;
    import javax.activation.DataHandler;
    import javax.activation.DataSource;
    import javax.activation.FileDataSource;
    import javax.mail.*;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;
    import com.alibaba.druid.util.StringUtils;
    import com.sun.mail.util.MailSSLSocketFactory;
    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;
    
    /**
     * 发送邮件工具类
     *
     * @author tp
     *
     */
    @Component
    public class EmailUtil {
    
        @Autowired
        private JavaMailSender mailSender;
        @Value("${spring.mail.password}")
        private String password;
    
        /**
         * 发送带附件的邮件
         *
         * @param to  收件人
         * @param subject  邮件主题
         * @param msg      邮件内容
         * @param filename 附件地址
         * @return
         * @throws GeneralSecurityException
         */
        public boolean sendMail(String from,String to, String subject, String msg, String filename)
                throws Exception {
    
            if (StringUtils.isEmpty(to)) {
                return false;
            }
            if (StringUtils.isEmpty(subject)){
                return false;
            }
            if (StringUtils.isEmpty(msg)){
                msg = "";
            }
            // 创建默认的 MimeMessage 对象
            MimeMessage message = mailSender.createMimeMessage();
            try {
    
                MimeMessageHelper helper = new MimeMessageHelper(message, true);
    
                helper.setFrom(from);
    
                helper.setTo(to);
    
                helper.setSubject(subject);
    
                helper.setText(msg, true);
    
                // 创建消息部分
                BodyPart messageBodyPart = new MimeBodyPart();
    
                // 消息
                messageBodyPart.setText(msg);
    
                // 创建多重消息
                Multipart multipart = new MimeMultipart();
    
                // 设置文本消息部分
                multipart.addBodyPart(messageBodyPart);
    
                if(filename != null) {
                    multipart = setFile(filename,multipart);
                }
                // 发送完整消息
                message.setContent(multipart);
                // 发送消息
                mailSender.send(message);
                return true;
            } catch (MessagingException e) {
                e.printStackTrace();
            }
            return false;
        }
    
    
        /**
         * 发送带附件的邮件
         * @param from  发件人
         * @param to  收件人
         * @param subject  邮件主题
         * @param msg      邮件内容
         * @param filename 附件地址
         * @return
         * @throws GeneralSecurityException
         */
        public boolean oldSendMail(String from,String to, String subject, String msg, String filename)
                throws GeneralSecurityException {
            if (StringUtils.isEmpty(to)) {
                return false;
            }
            if (StringUtils.isEmpty(msg)){
                msg = "";
            }
            /*
             * 2.配置协议
             * */
            Properties props = new Properties();
            //协议
            props.setProperty("mail.transport.protocol", "smtp");
            //服务器
            props.setProperty("mail.smtp.host", "smtp.126.com");
            //端口
            props.setProperty("mail.smtp.port", "25");
            //使用smtp身份验证
            props.setProperty("mail.smtp.auth", "true");
            //使用SSL，企业邮箱必需！
            //开启安全协议
            MailSSLSocketFactory sf = null;
            try {
                sf = new MailSSLSocketFactory();
                sf.setTrustAllHosts(true);
            } catch (GeneralSecurityException e1) {
                e1.printStackTrace();
            }
            props.put("mail.smtp.starttls.enable", "true");
            props.put("mail.smtp.ssl.socketFactory", sf);
            //发送邮箱账号密码
            Session session = Session.getDefaultInstance(props, new MyAuthenricator(from, password));
    
            try {
                // 创建默认的 MimeMessage 对象
                MimeMessage message = new MimeMessage(session);
    
                // Set From: 头部头字段
                message.setFrom(new InternetAddress(from));
    
                // Set To: 头部头字段
                message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
    
                // Set Subject: 主题文字
                message.setSubject(subject);
    
                // 创建消息部分
                BodyPart messageBodyPart = new MimeBodyPart();
    
                // 消息
                messageBodyPart.setText(msg);
    
                // 创建多重消息
                Multipart multipart = new MimeMultipart();
    
                // 设置文本消息部分
                multipart.addBodyPart(messageBodyPart);
    
                if(filename != null) {
                   multipart = setFile(filename,multipart);
                }
                // 发送完整消息
                message.setContent(multipart);
                // 发送消息
                Transport.send(message);
                return true;
            } catch (MessagingException e) {
                e.printStackTrace();
            } /*catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }*/
            return false;
        }
    
        public  Multipart  setFile(String filename,Multipart multipart) throws MessagingException {
            // 附件部分
            BodyPart  messageBodyPart = new MimeBodyPart();
            // 设置要发送附件的文件路径
            DataSource source = new FileDataSource(filename);
            messageBodyPart.setDataHandler(new DataHandler(source));
            // messageBodyPart.setFileName(filename);
            // 处理附件名称中文（附带文件路径）乱码问题
            messageBodyPart.setFileName(source.getName());
            multipart.addBodyPart(messageBodyPart);
            return multipart;
        }
        //用户名密码验证，需要实现抽象类Authenticator的抽象方法PasswordAuthentication
        static class MyAuthenricator extends Authenticator {
            String u = null;
            String p = null;
            public MyAuthenricator(String u,String p){
                this.u=u;
                this.p=p;
            }
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(u,p);
            }
        }
    
    
    }

解决附件名称过长，导致附件名称变化的问题

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NDUwMDg5_size_16_color_FFFFFF_t_70]: /images/20220418/18e8981d9c8f4ae9b56e4db193501775.png