实现邮件发送：简单邮件、附件邮件、嵌入资源的邮件、模板邮件

Chapter4-5-1/pom.xml

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+<?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.didispace</groupId>
+	<artifactId>Chapter4-5-1</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter4-5-1</name>
+	<description>Spring Boot project</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.3.2.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-mail</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-velocity</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

Chapter4-5-1/src/main/java/com/didispace/Application.java

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+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}

Chapter4-5-1/src/main/resources/application.properties

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+spring.mail.host=smtp.qq.com
+spring.mail.username=username@qq.com
+spring.mail.password=password
+spring.mail.properties.mail.smtp.auth=true
+spring.mail.properties.mail.smtp.starttls.enable=true
+spring.mail.properties.mail.smtp.starttls.required=true

Chapter4-5-1/src/main/resources/templates/template.vm

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+<html>
+<body>
+    <h3>你好， ${username}, 这是一封模板邮件!</h3>
+</body>
+</html>

Chapter4-5-1/src/test/java/com/didispace/ApplicationTests.java

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+package com.didispace;
+
+import org.apache.commons.collections.map.HashedMap;
+import org.apache.velocity.app.VelocityEngine;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.ui.velocity.VelocityEngineUtils;
+
+import javax.mail.internet.MimeMessage;
+import java.io.File;
+import java.util.Map;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = Application.class)
+public class ApplicationTests {
+
+	@Autowired
+	private JavaMailSender mailSender;
+	@Autowired
+	private VelocityEngine velocityEngine;
+
+	@Test
+	public void sendSimpleMail() throws Exception {
+
+		SimpleMailMessage message = new SimpleMailMessage();
+		message.setFrom("dyc87112@qq.com");
+		message.setTo("dyc87112@qq.com");
+		message.setSubject("主题：简单邮件");
+		message.setText("测试邮件内容");
+
+		mailSender.send(message);
+	}
+
+	@Test
+	public void sendAttachmentsMail() throws Exception {
+
+		MimeMessage mimeMessage = mailSender.createMimeMessage();
+
+		MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
+		helper.setFrom("dyc87112@qq.com");
+		helper.setTo("dyc87112@qq.com");
+		helper.setSubject("主题：有附件");
+		helper.setText("有附件的邮件");
+
+		FileSystemResource file = new FileSystemResource(new File("weixin.jpg"));
+		helper.addAttachment("附件-1.jpg", file);
+		helper.addAttachment("附件-2.jpg", file);
+
+		mailSender.send(mimeMessage);
+	}
+
+	@Test
+	public void sendInlineMail() throws Exception {
+
+		MimeMessage mimeMessage = mailSender.createMimeMessage();
+
+		MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
+		helper.setFrom("dyc87112@qq.com");
+		helper.setTo("dyc87112@qq.com");
+		helper.setSubject("主题：嵌入静态资源");
+		helper.setText("<html><body><img src=\"cid:weixin\" ></body></html>", true);
+
+		FileSystemResource file = new FileSystemResource(new File("weixin.jpg"));
+		helper.addInline("weixin", file);
+
+		mailSender.send(mimeMessage);
+	}
+
+	@Test
+	public void sendTemplateMail() throws Exception {
+
+		MimeMessage mimeMessage = mailSender.createMimeMessage();
+
+		MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
+		helper.setFrom("dyc87112@qq.com");
+		helper.setTo("dyc87112@qq.com");
+		helper.setSubject("主题：模板邮件");
+
+		Map<String, Object> model = new HashedMap();
+		model.put("username", "didi");
+		String text = VelocityEngineUtils.mergeTemplateIntoString(
+				velocityEngine, "template.vm", "UTF-8", model);
+		helper.setText(text, true);
+
+		mailSender.send(mimeMessage);
+	}
+
+}