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

spring.mail.host=smtp.126.com 
spring.mail.username=****@126.com 
spring.mail.password=password #上面获取设置的授权码 
spring.mail.default-encoding=UTF-8 

package com.xiaofangtech.sunt.controller; 
 
import javax.mail.internet.MimeMessage; 
 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.mail.javamail.JavaMailSender; 
import org.springframework.mail.javamail.MimeMessageHelper; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RestController; 
 
import com.xiaofangtech.sunt.utils.ResultMsg; 
import com.xiaofangtech.sunt.utils.ResultStatusCode; 
 
@RestController 
@RequestMapping("mail") 
public class MailController { 
  @Autowired 
  JavaMailSender mailSender; 
   
  @RequestMapping("sendemail") 
  public Object sendEmail() 
  { 
    try 
    { 
      final MimeMessage mimeMessage = this.mailSender.createMimeMessage(); 
      final MimeMessageHelper message = new MimeMessageHelper(mimeMessage); 
      message.setFrom("****@126.com"); 
      message.setTo("****@example.com"); 
      message.setSubject("测试邮件主题"); 
      message.setText("测试邮件内容"); 
      this.mailSender.send(mimeMessage); 
       
      ResultMsg resultMsg = new ResultMsg(ResultStatusCode.OK.getErrcode(), 
          ResultStatusCode.OK.getErrmsg(), null); 
      return resultMsg; 
    } 
    catch(Exception ex) 
    { 
      ResultMsg resultMsg = new ResultMsg(ResultStatusCode.SYSTEM_ERR.getErrcode(), 
          ResultStatusCode.SYSTEM_ERR.getErrmsg(), null); 
      return resultMsg; 
    } 
  } 
}