Java SMTP协议发送邮件

偏执的太偏执、 2024-04-06 15:01 65阅读 0赞

**1、Pom依赖引用**

<dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4.7</version>
    </dependency>

**2、配置文件配置邮箱基本信息**

smtp_email_service.url=xx.xx.xx.xx
    smtp_email_service.userName=xx@xx.com
    smtp_email_service.password=密码

**3、邮件工具类**

//邮件实体，自定义
    import xxx.PropertyConstants;
    import javax.mail.*;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;
    import java.util.Date;
    import java.util.Properties;
    
    public class MailUtils {
        
    
        public static void sendMail(MailInfo mailInfo) throws Exception{
        
            String host = PropertyConstants.getPropertiesKey("smtp_email_service.url");
            String userName = PropertyConstants.getPropertiesKey("smtp_email_service.userName");
            String password = PropertyConstants.getPropertiesKey("smtp_email_service.password");
    
            //1、连接邮件服务器的参数配置
            Properties prop = new Properties();
            //协议
            prop.setProperty("mail.transport.protocol", "smtp");
            //服务器
            prop.setProperty("mail.smtp.host", host);
            //端口
            prop.setProperty("mail.smtp.port", "25");
            //使用smtp身份验证
            prop.setProperty("mail.smtp.auth", "true");
    
            Session session = Session.getInstance(prop,new Authenticator() {
        
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
        
                    return new PasswordAuthentication(userName, password);
                }
            });
    
      
            MimeMessage mimeMessage = new MimeMessage(session);
            try {
        
                //发件人
                mimeMessage.setFrom(new InternetAddress(userName));        //可以设置发件人的别名
                //收件人
                for (String to:mailInfo.getToList()){
        
                    mimeMessage.addRecipient(MimeMessage.RecipientType.TO, new InternetAddress(to));
                }
                //抄送人
                for (String to:mailInfo.getCcList()){
        
                    mimeMessage.addRecipient(MimeMessage.RecipientType.CC, new InternetAddress(to));
                }
                //主题
                mimeMessage.setSubject(mailInfo.getSubject(),"UTF-8");
                //时间
                mimeMessage.setSentDate(new Date());
                //容器类，可以包含多个MimeBodyPart对象
                Multipart mp = new MimeMultipart();
    
                //MimeBodyPart可以包装文本，图片，附件
                MimeBodyPart body = new MimeBodyPart();
    
                //HTML正文
                body.setContent(mailInfo.getBody(), "text/html; charset=UTF-8");
                mp.addBodyPart(body);
    
                //设置邮件内容
                mimeMessage.setContent(mp);
    
                //仅仅发送文本
                //mimeMessage.setText(content);
                mimeMessage.saveChanges();
                Transport.send(mimeMessage);
            } catch (Exception e) {
        
                System.out.println(e.getMessage());
            }
        }
    }

**4、邮件实体**

import lombok.Data;
    import microsoft.exchange.webservices.data.core.enumeration.property.BodyType;
    import java.util.ArrayList;
    import java.util.List;
    
    @Data
    public class MailInfo {
        
        private String subject;
        String body;
        BodyType bodyType;
        /**
         *  收件人
         */
        List<String> toList;
    
        /**
         *  抄送人
         */
        List<String> ccList;
    
        /**
         * 附件
         */
        List<MailAttachement> attachements;
    
        public MailInfo(){
        
            this.toList=new ArrayList<>();
            this.ccList=new ArrayList<>();
            this.attachements=new ArrayList<>();
            this.bodyType=BodyType.Text;
        }
    
        public String getSubject() {
        
            return subject;
        }
    
        public void setSubject(String subject) {
        
            this.subject = subject;
        }
    
        public String getBody() {
        
            return body;
        }
    
        public void setBody(String body) {
        
            this.body = body;
        }
    
        public BodyType getBodyType() {
        
            return bodyType;
        }
    
        public void setBodyType(BodyType bodyType) {
        
            this.bodyType = bodyType;
        }
    
        public List<String> getToList() {
        
            return toList;
        }
    
        public void setToList(List<String> toList) {
        
            this.toList = toList;
        }
    
        public List<String> getCcList() {
        
            return ccList;
        }
    
        public void setCcList(List<String> ccList) {
        
            this.ccList = ccList;
        }
    
        public List<MailAttachement> getAttachements() {
        
            return attachements;
        }
    
        public void setAttachements(List<MailAttachement> attachements) {
        
            this.attachements = attachements;
        }
    }

**5、附件实体**

public class MailAttachement {
        
    
        String name;
        byte[] contentStream;
    
        public String getName() {
        
            return name;
        }
    
        public void setName(String name) {
        
            this.name = name;
        }
    
        public byte[] getContentStream() {
        
            return contentStream;
        }
    
        public void setContentStream(byte[] contentStream) {
        
            this.contentStream = contentStream;
        }
    }

**6、方法使用实例**

//设置正文
    StringBuffer theMessage = new StringBuffer();
    //设置具体正文内容
    theMessage.append("<span style='width:100%;display:inline-block;text-align:center; font-family:宋体; font-size:29px; font-weight:bold'>xxxxxx</span>");
    theMessage.append("<br>");
    theMessage.append("<br>");
    
    MailInfo mailInfo = new MailInfo();
    //设置主题，title 为 String 类型
    mailInfo.setSubject(title);
    mailInfo.setBody(theMessage.toString());
    //设置发送人,list为String集合
    mailInfo.setToList(list);
    //设置抄送人
    mailInfo.setCcList(list);
    //调用工具类
    MailUtils.sendMail(mailInfo);