java实现邮件发送详解

<dependency >
  <groupId >com.sun.mail</groupId >
  <artifactId >javax.mail</artifactId >
  <version >1.6.0</version >
</dependency >

package com.email;

import java.io.Serializable;

/**
 * @Author zjt
 * @Date 2019年03月07 10:37
 */
public class EmailEntity implements Serializable {
 private static final long serialVersionUID = 1L;
 //邮箱服务器地址
 private String host;
 //主机端口
 private Integer port;
 //发送者的邮箱账号
 private String userName;
 //发送者的密码
 private String password;
 //发送者的邮箱地址
 private String fromAddress;
 //接收者的邮箱地址
 private String toAddress;
 //设置邮件主题
 private String subject;
 //设置邮件内容
 private String context;
 //设置邮件类型
 private String contextType;

 public String getHost() {
  return host;
 }

 public void setHost(String host) {
  this.host = host;
 }

 public Integer getPort() {
  return port;
 }

 public void setPort(Integer port) {
  this.port = port;
 }

 public String getUserName() {
  return userName;
 }

 public void setUserName(String userName) {
  this.userName = userName;
 }

 public String getPassword() {
  return password;
 }

 public void setPassword(String password) {
  this.password = password;
 }

 public String getFromAddress() {
  return fromAddress;
 }

 public void setFromAddress(String fromAddress) {
  this.fromAddress = fromAddress;
 }

 public String getToAddress() {
  return toAddress;
 }

 public void setToAddress(String toAddress) {
  this.toAddress = toAddress;
 }

 public String getSubject() {
  return subject;
 }

 public void setSubject(String subject) {
  this.subject = subject;
 }

 public String getContext() {
  return context;
 }

 public void setContext(String context) {
  this.context = context;
 }

 public String getContextType() {
  return contextType;
 }

 public void setContextType(String contextType) {
  this.contextType = contextType;
 }
}

package com.email;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.*;

/**
 * @Author zjt
 * @Date 2019年03月07 10:38
 */
public class EmailSend {
 
 public static boolean EmailSendTest(EmailEntity emailEntity){
  try {
   //配置文件
   Properties properties = new Properties();
   properties.put("mail.smtp.auth", "true");
   properties.put("mail.smtp.host", emailEntity.getHost());
   properties.put("mail.smtp.port", 25);
   properties.put("mail.smtp.starrttls.enable", "true");
   //创建会话
   VerifyEmail verifyEmail = new VerifyEmail(emailEntity.getUserName(), emailEntity.getPassword());
   Session mailSession = Session.getInstance(properties, verifyEmail);
   mailSession.setDebug(true);
   //创建信息对象
   Message message = new MimeMessage(mailSession);
   InternetAddress from = new InternetAddress(emailEntity.getFromAddress());
   InternetAddress to = new InternetAddress(emailEntity.getToAddress());
   //设置邮件信息的来源
   message.setFrom(from);
   //设置邮件的接收者
   message.setRecipient(MimeMessage.RecipientType.TO, to);
   message.setSubject(emailEntity.getSubject());
   //设置邮件发送日期
   message.setSentDate(new Date());
   //设置邮件内容
   message.setContent(emailEntity.getContext() , emailEntity.getContextType());
   message.saveChanges();
   //发送邮件
   Transport transport = mailSession.getTransport("smtp");
   transport.connect(emailEntity.getHost(), emailEntity.getUserName(), emailEntity.getPassword());
   System.out.println("发送:" + transport);
   transport.sendMessage(message, message.getAllRecipients());
   System.out.println("success");
   return true;
  } catch (MessagingException e) {
   e.printStackTrace();
   System.out.println("fial...");
   return false;

  }
 }
}

package com.email;

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

/**
 * 验证邮箱
 * @Author zjt
 * @Date 2019年03月07 10:32
 */
public class VerifyEmail extends Authenticator {
 //账号
 private String userName;
 //密码
 private String password;

 public String getUserName() {
  return userName;
 }

 public void setUserName(String userName) {
  this.userName = userName;
 }

 public String getPassword() {
  return password;
 }

 public void setPassword(String password) {
  this.password = password;
 }

 //构造方法
 public VerifyEmail(){
  super();
 }

 public VerifyEmail(String userName, String password) {
  super();
  this.userName = userName;
  this.password = password;
 }
 protected PasswordAuthentication getPasswordAuthentication(){

  return new PasswordAuthentication(userName, password);

 }
}

package com.email;

import org.junit.jupiter.api.Test;

/**
 * @Author zjt
 * @Date 2019年03月07 10:26
 */
public class TestEmail {

 @Test
 public void test(){
  EmailEntity email = new EmailEntity();
  email.setUserName("*******@163.com");
  email.setPassword("******");
  email.setHost("smtp.163.com");
  email.setPort(25);
  email.setFromAddress("******@163.com");
  email.setToAddress("******@163.com");
  email.setSubject("这是一封测试邮件!!!!");
  email.setContext("看看这是什么");
  email.setContextType("text/html;charset=utf-8");
  boolean flag = EmailSend.EmailSendTest(email);
  System.err.println("邮件发送结果=="+flag);
 }

}