gmail邮箱发送邮件 java

谷歌邮箱配置：

首先登录邮箱 进入设置 如下

开启二步验证

进入二次验证，底部有个应用专用密码，进入设置

代码配置：

首先导入依赖

<dependency>
   <groupId>javax.mail</groupId>
   <artifactId>mail</artifactId>
   <version>1.4.7</version>
</dependency>

配置项 yml

### email begin
  mail:
    host: smtp.gmail.com
    username: xxx@gmail.com  ### 邮箱地址
    password: xxxxx  ### 应用专用密码
    protocol: smtp
    properties.mail.smtp.auth: true
    properties.mail.smtp.port: 465
    properties.mail.display.sendmail: xxx@gmail.com
    properties.mail.display.sendname: xxx@gmail.com
    properties.mail.smtp.starttls.enable: true
    properties.mail.smtp.starttls.required: true
    properties.mail.smtp.ssl.enable: true
    from: xxx@gmail.com
    default-encoding: utf-8
#### email end

代码块

@Value("${spring.mail.from}")
private String from;

@Resource
private JavaMailSender mailSender;

/**
 * 发送文本邮件
 * @param to
 * @param subject
 */
@Override
public ResultBean sendSimpleMail(String to, String subject，String contentStr) {
    SimpleMailMessage message = new SimpleMailMessage();
    message.setFrom(from); //配置邮箱
    message.setTo(to);  //收件邮箱
    message.setSubject(subject); //邮件标题
    message.setText(contentStr); //邮件内容
    try{
        mailSender.send(message);
    }catch (Exception e){
        e.printStackTrace();
    }
    return new ResultBean();
}