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增加发送邮件最佳实践
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‎javamail-practice/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.coderdream</groupId>
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<artifactId>javamail-practice</artifactId>
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<version>1.0-SNAPSHOT</version>
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<name>javamail-practice</name>
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<!-- FIXME change it to the project's website -->
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<url>http://www.example.com</url>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.7</maven.compiler.source>
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<maven.compiler.target>1.7</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax.mail</groupId>
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<artifactId>mail</artifactId>
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<version>1.5.0-b01</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
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<plugins>
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<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
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<plugin>
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<artifactId>maven-clean-plugin</artifactId>
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<version>3.1.0</version>
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</plugin>
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<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
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<plugin>
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<artifactId>maven-resources-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.0</version>
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</plugin>
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.22.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-jar-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-install-plugin</artifactId>
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<version>2.5.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>2.8.2</version>
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</plugin>
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<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
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<plugin>
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<artifactId>maven-site-plugin</artifactId>
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<version>3.7.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-project-info-reports-plugin</artifactId>
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<version>3.0.0</version>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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</project>

‎javamail-practice/src/main/java/com/coderdream/App.java‎

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package com.coderdream;
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/**
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* Hello world!
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*
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*/
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public class App
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{
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public static void main( String[] args )
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{
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System.out.println( "Hello World!" );
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}
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}

‎javamail-practice/src/main/java/com/coderdream/SendMailUtil.java‎

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package com.coderdream;
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import javax.mail.*;
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import javax.mail.internet.InternetAddress;
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import javax.mail.internet.MimeMessage;
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import java.util.Properties;
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/**
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* @author ：CoderDream
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* @date ：Created in 2021/9/2 15:35
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* @description：邮件工具类
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* @modified By：CoderDream
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* @version: 1.0$
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*/
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public class SendMailUtil {
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public static void sendEmail(String to, String content) throws Exception {
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//1.创建连接对象
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Properties properties = new Properties();
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//1.2 设置发送邮件的服务器
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properties.put("mail.smtp.host","smtp.126.com");
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//1.3 需要经过授权,用户名和密码的校验(必须)
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properties.put("mail.smtp.auth",true);
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//1.4 默认以25端口发送
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properties.setProperty("mail.smtp.socketFactory.class" , "javax.net.ssl.SSLSocketFactory");
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properties.setProperty("mail.smtp.socketFactory.fallback" , "false");
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properties.setProperty("mail.smtp.port" , "465");
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properties.setProperty("mail.smtp.socketFactory.port" , "465");
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//1.5 认证信息
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Session session = Session.getInstance(properties, new Authenticator() {
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@Override
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protected PasswordAuthentication getPasswordAuthentication() {
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return new PasswordAuthentication("acoder@126.com" , "授权码");
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}
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});
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//2.创建邮件对象
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Message message = new MimeMessage(session);
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//2.1设置发件人
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message.setFrom(new InternetAddress("acoder@126.com"));
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//2.2设置收件人
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message.setRecipient(Message.RecipientType.TO,new InternetAddress(to));
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//2.3设置抄送者(PS:没有这一条网易会认为这是一条垃圾短信，而发不出去)
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message.setRecipient(Message.RecipientType.CC,new InternetAddress("acoder@126.com"));
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//2.4设置邮件的主题
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message.setSubject("主题");
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//2.5设置邮件的内容
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message.setContent(""+content+"","text/html;charset=utf-8");
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//3.发送邮件
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Transport.send(message);
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}
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//直接在main方法下测试
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public static void main(String[] args) throws Exception {
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sendEmail("xulin.wh@qq.com", "邮件内容");
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}
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}

‎javamail-practice/src/test/java/com/coderdream/AppTest.java‎

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package com.coderdream;
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import static org.junit.Assert.assertTrue;
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import org.junit.Test;
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/**
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* Unit test for simple App.
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*/
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public class AppTest
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{
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/**
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* Rigorous Test :-)
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*/
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@Test
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public void shouldAnswerWithTrue()
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{
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assertTrue( true );
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}
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}

‎pom.xml‎

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<version>1.0-SNAPSHOT</version>
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<modules>
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<module>junit5-practice</module>
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<module>javamail-practice</module>
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</modules>
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<name>Maven</name>

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