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SpringBoot整合Email遇到的问题

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今天，在学习SpringBoot整合Email时，遇到一个异常：java.net.UnknownHostException: smtp.qq.com ，Couldn’t connect to host, port: smtp.qq.com , 25; timeout -1;用的是QQ邮箱的POP3/SMTP服务。

分析问题：显示不能连接主机，端口：smtp.qq.com 25,代码没问题。一访问Controller就显示500错误。可能情况:

1.要在邮件设置中把POP3/SMTP服务开启。

2.ping或者telnet下smtp.qq.com，看是否接通

3.改变下端口号

4.如有安装要杀毒软件或防火墙，比如：McAFee 要在控制台->访问保护(右键)->属性->防病毒标准保护->禁止群发邮件蠕虫发送邮件->前面没有打钩

更改前配置代码

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spring.mail.host=smtp.qq.com 
spring.mail.username=719196335@qq.com
spring.mail.password=yxkcobqdkhmjbcac
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

更改后如下代码：

配置文件代码

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spring.mail.host=smtp.qq.com
spring.mail.username=719196335@qq.com
spring.mail.password=qhimjcetrjmbbdhb
spring.mail.properties.mail.smtp.ssl.enable=true
spring.mail.properties.mail.smtp.ssl.trust=smtp.qq.com
spring.mail.properties.mail.socketFactory.class=javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.smtp.socketFactory.port=465
spring.mail.properties.mail.smtp.port=465
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

EmialConfig代码

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package net.zzqd.email;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class EmailConfig {
	@Value("${spring.mail.username}")
	private String emailForm;

	
	public String getEmailForm() {
		return emailForm;
	}

	public void setEmailForm(String emailForm) {
		this.emailForm = emailForm;
	}
	
}

EmialController

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package net.zzqd.email;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class EmailController {
	@Autowired
	private EmailService emailService;
	
	@RequestMapping("/simple")
	@ResponseBody
	public String sendSimpleEmail()
	{
		emailService.sendSimpleMail("719196335@qq.com", "你好","明天找你玩");
		return "success";
	}
}

EmailService

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package net.zzqd.email;

public interface EmailService {
	//发送简单的邮件
	void sendSimpleMail(String sendTo, String title, String content);
}

EmailServiceImpl

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package net.zzqd.email;

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

@Service
public class EmailServiceImpl implements EmailService{

	@Autowired
	private EmailConfig emailConfig;
	
	@Autowired
	private JavaMailSender mailSender;
	
	@Override
	public void sendSimpleMail(String sendTo,String title,String content) {
		//简单邮件的发送
		SimpleMailMessage message = new SimpleMailMessage();
		message.setFrom(emailConfig.getEmailForm());
		message.setTo(sendTo);
		message.setSubject(title);
		message.setText(content);
		
		mailSender.send(message);
	}
}

附加：经过上述一切判断发现都没问题，有将端口号改为465，发现出现501错误码，了解以后发现是从application.properties获取的账号和Message中设置的不一致造成的，在ServiceImpl中添加控制台打印发现是null，仔细观察了代码，发现注解写错位置了。如下图，完美解决。