这次把两种情况仔细说一下，因为好多人问啦。
第一种：企业邮箱
这里在这一篇已经说的很清楚了，这次不过是建立个maven工程，引入了最新的javamail依赖，代码优化了一下。直接上代码
pom
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.demo</groupId>
<artifactId>javamail-update</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/javax.mail/javax.mail-api -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.6.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.1.8.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
CompanyEmail.properties
e.account=***@***.cn e.pass=*** e.host=smtp.exmail.qq.com e.port=465 e.protocol=smtp
SendEmailCompanyUtils
package com.demo;
import com.sun.mail.util.MailSSLSocketFactory;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.util.StringUtils;
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.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.util.Date;
import java.util.Properties;
/**
* 企业邮箱
*/
public class SendEmailCompanyUtils {
private static String account; //登录用户名
private static String pass; //登录密码
private static String host; //服务器地址（邮件服务器）
private static String port; //端口
private static String protocol; //协议
static{
Properties prop = new Properties();
// InputStream instream = ClassLoader.getSystemResourceAsStream("CompanyEmail.properties");//测试环境
try {
// prop.load(instream);//测试环境
prop = PropertiesLoaderUtils.loadAllProperties("CompanyEmail.properties");//生产环境
} catch (IOException e) {
System.out.println("加载属性文件失败");
}
account = prop.getProperty("e.account");
pass = prop.getProperty("e.pass");
host = prop.getProperty("e.host");
port = prop.getProperty("e.port");
protocol = prop.getProperty("e.protocol");
}
static class MyAuthenticator extends Authenticator {
String u = null;
String p = null;
private MyAuthenticator(String u,String p){
this.u=u;
this.p=p;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(u,p);
}
}
private String to; //收件人
private String subject; //主题
private String content; //内容
private String fileStr; //附件路径
public SendEmailCompanyUtils(String to, String subject, String content, String fileStr) {
this.to = to;
this.subject = subject;
this.content = content;
this.fileStr = fileStr;
}
public void send(){
Properties prop = new Properties();
//协议
prop.setProperty("mail.transport.protocol", protocol);
//服务器
prop.setProperty("mail.smtp.host", host);
//端口
prop.setProperty("mail.smtp.port", port);
//使用smtp身份验证
prop.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);
prop.put("mail.smtp.ssl.enable", "true");
prop.put("mail.smtp.ssl.socketFactory", sf);
} catch (GeneralSecurityException e1) {
e1.printStackTrace();
}
Session session = Session.getDefaultInstance(prop, new MyAuthenticator(account, pass));
session.setDebug(true);
MimeMessage mimeMessage = new MimeMessage(session);
try {
//发件人
mimeMessage.setFrom(new InternetAddress(account,"XXX")); //可以设置发件人的别名
//mimeMessage.setFrom(new InternetAddress(account)); //如果不需要就省略
//收件人
mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
//主题
mimeMessage.setSubject(subject);
//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(content, "text/html; charset=UTF-8");
mp.addBodyPart(body);
//添加图片&附件
if(!StringUtils.isEmpty(fileStr)){
body = new MimeBodyPart();
body.attachFile(fileStr);
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 (MessagingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
CompanySending
package com.demo;
/**
* 发送线程
*/
public class CompanySending implements Runnable {
private String to; //收件人
private String subject; //主题
private String content; //内容
private String fileStr; //附件路径
public CompanySending(String to, String subject, String content, String fileStr) {
this.to = to;
this.subject = subject;
this.content = content;
this.fileStr = fileStr;
}
public void run() {
SendEmailCompanyUtils sendEmail = new SendEmailCompanyUtils(to, subject, content, fileStr);
sendEmail.send();
}
}
CompanySendingPool
package com.demo;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* 发送线程池
*/
public class CompanySendingPool {
private CompanySendingPool() {
}
private static class Inner{
private static CompanySendingPool instance = new CompanySendingPool();
}
public static CompanySendingPool getInstance(){
return Inner.instance;
}
/**
* 核心线程数：5
* 最大线程数：10
* 时间单位：秒
* 阻塞队列：10
*/
private static ThreadPoolExecutor executor = new ThreadPoolExecutor(
5,
10,
0L,
TimeUnit.SECONDS,
new ArrayBlockingQueue<>(10));
public CompanySendingPool addThread(CompanySending sending){
executor.execute(sending);
return getInstance();
}
public void shutDown(){
executor.shutdown();
}
}
测试
package com.demo;
public class MyTest {
public static void main(String[] args) {
CompanySendingPool pool = CompanySendingPool.getInstance();
pool.addThread(new CompanySending("***@qq.com", "AAA", createEmail().toString(), "file/1.jpg")).shutDown();
}
private static StringBuilder createEmail() {
return new StringBuilder("<!DOCTYPE html><html><head><meta charset='UTF-8'><title>快来买桃子</title><style type='text/css'> .container{ font-family: 'Microsoft YaHei'; 600px; margin: 0 auto; padding: 8px; border: 3px dashed #db303f; border-radius: 6px; } .title{ text-align: center; color: #db303f; } .content{ text-align: justify; color: #717273; font-weight: 600; } footer{ text-align: right; color: #db303f; font-weight: 600; font-size: 18px; }</style></head><body><div class='container'><h2 class='title'>好吃的桃子</h2><p class='content'>桃子含有维生素A、维生素B和维生素C,儿童多吃桃子可使身体健康成长,因为桃子含有的多种维生索可以直接强化他们的身体和智力。</p><footer>联系桃子：11110000</footer></div></body></html>");
}
}
第二种：个人邮箱
--
--
--
--
--
记下授权码，一毛钱呢。下面上代码
PersonalEmail.properties
# 发件邮箱 e.account=from@qq.com # 不需要密码 #e.pass=*** e.host=smtp.qq.com e.port=25 e.protocol=smtp # 授权码 e.authorizationCode=fvwmtg***bchb
SendEmailPersonalUtils
package com.demo;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.util.StringUtils;
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.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
/**
* 关于授权码：https://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256
* 个人邮箱
*/
public class SendEmailPersonalUtils {
private static String account; //登录用户名
private static String pass; //登录密码
private static String host; //服务器地址（邮件服务器）
private static String port; //端口
private static String protocol; //协议
static{
Properties prop = new Properties();
// InputStream instream = ClassLoader.getSystemResourceAsStream("PersonalEmail.properties");//测试环境
try {
// prop.load(instream);//测试环境
prop = PropertiesLoaderUtils.loadAllProperties("PersonalEmail.properties");//生产环境
} catch (IOException e) {
System.out.println("加载属性文件失败");
}
account = prop.getProperty("e.account");
// 个人邮箱需要授权码，而不是密码。在密码的位置上填写授权码
pass = prop.getProperty("e.authorizationCode");
host = prop.getProperty("e.host");
port = prop.getProperty("e.port");
protocol = prop.getProperty("e.protocol");
}
static class MyAuthenticator extends Authenticator {
String u = null;
String p = null;
private MyAuthenticator(String u,String p){
this.u=u;
this.p=p;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(u,p);
}
}
private String to; //收件人
private String subject; //主题
private String content; //内容
private String fileStr; //附件路径
public SendEmailPersonalUtils(String to, String subject, String content, String fileStr) {
this.to = to;
this.subject = subject;
this.content = content;
this.fileStr = fileStr;
}
public void send(){
Properties prop = new Properties();
//协议
prop.setProperty("mail.transport.protocol", protocol);
//服务器
prop.setProperty("mail.smtp.host", host);
//端口
prop.setProperty("mail.smtp.port", port);
//使用smtp身份验证
prop.setProperty("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(prop, new SendEmailPersonalUtils.MyAuthenticator(account, pass));
session.setDebug(true);
MimeMessage mimeMessage = new MimeMessage(session);
try {
//发件人
mimeMessage.setFrom(new InternetAddress(account,"XXX")); //可以设置发件人的别名
//mimeMessage.setFrom(new InternetAddress(account)); //如果不需要就省略
//收件人
mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
//主题
mimeMessage.setSubject(subject);
//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(content, "text/html; charset=UTF-8");
mp.addBodyPart(body);
//添加图片&附件
if(!StringUtils.isEmpty(fileStr)){
body = new MimeBodyPart();
body.attachFile(fileStr);
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 (MessagingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
PersonalSending
package com.demo;
/**
* 发送线程
*/
public class PersonalSending implements Runnable {
private String to; //收件人
private String subject; //主题
private String content; //内容
private String fileStr; //附件路径
public PersonalSending(String to, String subject, String content, String fileStr) {
this.to = to;
this.subject = subject;
this.content = content;
this.fileStr = fileStr;
}
public void run() {
SendEmailPersonalUtils sendEmail = new SendEmailPersonalUtils(to, subject, content, fileStr);
sendEmail.send();
}
}
PersonalSendingPool
package com.demo;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* 发送线程池
*/
public class PersonalSendingPool {
private PersonalSendingPool() {
}
private static class Inner{
private static PersonalSendingPool instance = new PersonalSendingPool();
}
public static PersonalSendingPool getInstance(){
return PersonalSendingPool.Inner.instance;
}
/**
* 核心线程数：5
* 最大线程数：10
* 时间单位：秒
* 阻塞队列：10
*/
private static ThreadPoolExecutor executor = new ThreadPoolExecutor(
5,
10,
0L,
TimeUnit.SECONDS,
new ArrayBlockingQueue<>(10));
public PersonalSendingPool addThread(PersonalSending sending){
executor.execute(sending);
return getInstance();
}
public void shutDown(){
executor.shutdown();
}
}
测试：
package com.demo;
public class MyTest {
public static void main(String[] args) {
PersonalSendingPool pool = PersonalSendingPool.getInstance();
pool.addThread(new PersonalSending("***@qq.com", "BBB", createEmail().toString(), "file/1.jpg")).shutDown();
}
private static StringBuilder createEmail() {
return new StringBuilder("<!DOCTYPE html><html><head><meta charset='UTF-8'><title>快来买桃子</title><style type='text/css'> .container{ font-family: 'Microsoft YaHei'; 600px; margin: 0 auto; padding: 8px; border: 3px dashed #db303f; border-radius: 6px; } .title{ text-align: center; color: #db303f; } .content{ text-align: justify; color: #717273; font-weight: 600; } footer{ text-align: right; color: #db303f; font-weight: 600; font-size: 18px; }</style></head><body><div class='container'><h2 class='title'>好吃的桃子</h2><p class='content'>桃子含有维生素A、维生素B和维生素C,儿童多吃桃子可使身体健康成长,因为桃子含有的多种维生索可以直接强化他们的身体和智力。</p><footer>联系桃子：11110000</footer></div></body></html>");
}
}
如果是网易邮箱
进入设置
点击开启
不得不说，网易良心啊，不用短信费，输入正确的验证码之后
输入授权码（自己定义）
到此授权码设置完成。
然后呢，只需要打开PersonalEmail.properties属性文件。修改三个地方即可。
收到的
GitHub地址：https://github.com/Mysakura/JavaMail-Update
第三种：Android（有Android专门支持的jar包）
https://javaee.github.io/javamail/#JavaMail_for_Android
在中央仓库里也可以看见哦
https://mvnrepository.com/artifact/com.sun.mail/android-mail
https://mvnrepository.com/artifact/com.sun.mail/android-activation