java發送郵件功能,以發送qq郵件爲例

問題①: java發送qq郵件出現以下錯誤的解決方法:

     503 Error: need EHLO and AUTH first !

pop.put("mail.smtp.auth", "true");//注意value值不能不設置,而且不能是Boolean類型,應爲字符串,不然會報如上所示錯誤

問題②: Could not connect to SMTP host: smtp.qq.com, port: 465, response: -1

緣由:

    465端口是爲SMTPS（SMTP-over-SSL）協議服務開放的，這是SMTP協議基於SSL安全協議之上的一種變種協議.

  解決方法:

       配置文件須要加上以下代碼便可解決.

pop.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

附上全部的代碼:

配置文件:

mail:
    mailhost: smtp.qq.com
    mailport: 465
    user: 郵箱用戶名
    password: 密碼(qq爲受權碼)
    mailFrom: xxx@foxmail.com
    mailTo: xxx@qq.com,xxx@qq.com,xxx@foxmail.com
    properties:
      mail:
      	smtp:
      	  auth: true
      	  mailtimeout: 1000
      	  mailssl: javax.net.ssl.SSLSocketFactory
      	  starttls: 
      	     enable: true
      	     required: true

java代碼:

@Value("${mailhost}")
	private String host;
	
	@Value("${mailport}")
	private Integer port;
	
	@Value("${user}")
	private String username;

	@Value("${password}")
	private String password;
	
	@Value("${mailFrom}")
	private String from;
	
	@Value("${mailTo}")
	private String [] to;

	@Value("${auth}")
	private String auth;

	@Value("${enable}")
	private Boolean enable;

	@Value("${required}")
	private Boolean required;

	@Value("${mailtimeout}")
	private Integer timeout;
	
	@Value("${mailssl}")
	private String ssl;
	public void onApplicationEvent(ApplicationEvent event) {
		System.out.println("email cfg....");
		System.out.println("print:"+this.toString());
		//建立一個發送者對象
		JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
		mailSender.setHost(this.host);
		mailSender.setPort(this.port);
		mailSender.setUsername(this.username);
		mailSender.setPassword(this.password);
		// 加認證機制
		Properties pop = new Properties();
		pop.put("mail.smtp.host", this.host);
//		pop.put("mail.smtp.port", this.port);//已經在上面加過
		pop.put("mail.smtp.auth", this.auth);//必須是字符串而不能是boolean不然報錯
		pop.put("mail.smtp.starttls.enable", this.enable);
		pop.put("mail.smtp.timeout", this.timeout);
		pop.put("mail.smtp.socketFactory.class", this.ssl);
		mailSender.setJavaMailProperties(pop);

		//組織郵件參數並執行發送
		SimpleMailMessage message = new SimpleMailMessage();
		message.setFrom(this.from);
		message.setTo(this.to);
		message.setSubject("主題：測試,spring boot發送郵件.");
		message.setText("測 試\n 郵件爲程序發送,是否收到?請回答");
		mailSender.send(message);
		System.out.println("send end....");
    }
    @Override
    public String toString() {
	    return "EmailConfiguration [host=" + host + ", port=" + port + ", username=" + username
	            + ", password=" + password + ", from=" + from + ", to=" + to + ", auth=" + auth
	            + ", enable=" + enable + ", required=" + required + ", timeout=" + timeout + "]";
    }