Spring Boot完成文本邮件的发送

一、完成配置

在完成Spring Boot模板的基础上，完成配置

pom.xml

<?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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.6.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.neo</groupId>
	<artifactId>helloWorld</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>helloWorld</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-mail</artifactId>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

application.properties

spring.mail.host=smtp.126.com
spring.mail.username=你的126邮箱
spring.mail.password=126授权码
spring.mail.default-encoding=utf-8

二、完成编写MailService类

编写MailService

package com.neo.helloWorld.hello;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Service;

@Service
public class MailService {
    @Value("${spring.mail.username}")
    private String form;
    @Autowired
    private JavaMailSender mailSender;
    public void sayHello(){
        System.out.println("Hello World!");
    }

    public void sendSimpleMail(String to,String subject,String content){
        SimpleMailMessage message=new SimpleMailMessage();
        message.setTo(to);
        message.setSubject(subject);
        message.setText(content);
        message.setFrom(form);

        mailSender.send(message);
    }
}

三、完成测试类

package com.neo.helloWorld.service;

import com.neo.helloWorld.hello.MailService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;

@RunWith(SpringRunner.class)
@SpringBootTest
public class ServiceTest {
    @Resource
    MailService mailService;
    @Test
    public void sayHelloTest(){
        mailService.sayHello();
    }

    @Test
    public void sendSimpleMailTest(){
        mailService.sendSimpleMail("ifyouknowi@126.com","这是第一封邮件","大家好，这是我的第一封邮件！");
    }
}

完成效果：


可能出现的问题及改正方法：