01_JAVA最详细的邮件发送代码

JAVA最详细的邮件发送代码

package com.myproject.aiplatform.aiopenplatform.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.util.Properties;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

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 final String subject = MailConfig.subject;
    private static final String html = MailConfig.html;
    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");
        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 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);
//      messageHelper.addAttachment("", new File(""));//附件
        mailSender.send(mimeMessage);
    }

}

MailConfig类（获取.properties文件内容）

package com.myproject.aiplatform.aiopenplatform.util;

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

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 String html;
    public static String subject;
    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();
            //解决中文乱码，采取reader把inputStream转换成reader用字符流来读取中文
            BufferedReader bf = new BufferedReader(new InputStreamReader(inputStream));  
            properties.load(bf); 
            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 = properties.getProperty("personal");
            html = properties.getProperty("html");
            subject = properties.getProperty("subject");
        } catch(IOException e){
    
    
            e.printStackTrace();
        }
    }
}

mailConfig.properties（配置一些邮件主题、发件人等信息）

#服务器
mailHost=smtp.163.com
#端口号
mailPort=25
#邮箱账号
mailUsername=***@163.com
#邮箱授权码
mailPassword=***
#时间延迟
mailTimeout=25000
#发送人
mailFrom=***@163.com
#发件人
personal=黑白色调
#主题
subject=***
#内容模板
html=您的邮箱验证码为：

PS：1、必须登录163邮箱授权第三方使用（也就是得到邮箱授权码）。
2、.properties文件中邮箱账号和发送人必须一致。
邮箱授权码获取（登录邮箱—设置—客户端授权密码—开启）：
3. 转他人整理（未验证先暂存）