javamail郵件發送
阿新 • • 發佈：2018-12-14
ner 登錄 use pass trac cnblogs highlight ide one
按這條博客寫的方法https://www.cnblogs.com/xdp-gacl/p/4216311.html
日誌信息：
DEBUG SMTP: AUTH LOGIN command trace suppressed DEBUG SMTP: AUTH LOGIN succeeded DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle] DEBUG SMTP: need username and password for authentication DEBUG SMTP: protocolConnect returningfalse, host=smtp.sina.com, user=fyf, password=<null> javax.mail.AuthenticationFailedException: failed to connect, no password specified?
顯示登錄成功但是發送需要認證（need username and password for authentication）
所以session獲取方法需要修改，添加認證信息
Session session = Session.getInstance(prop);
改為
Session session = Session.getDefaultInstance(prop,new SimpleAuthenticator(USERNAME,PASSWORD));
其中SimpleAuthenticator類需要繼承javax.mail.Authenticator;
因為javax.mail.Authenticator;並沒有實現getPasswordAuthentication()方法，根據Authenticator中對該方法的描述
/**
* Called when password authentication is needed. Subclasses should
* override the default implementation, which returns null. <p>
*
* Note that if this method uses a dialog to prompt the user for this
* information, the dialog needs to block until the user supplies the
* information. This method can not simply return after showing the
* dialog.
* @return The PasswordAuthentication collected from the
* user, or null if none is provided.
*/
protected PasswordAuthentication getPasswordAuthentication() {
return null;
}
當需要密碼認證是會被調用，子類必須實現該方法，並返回PasswordAuthentication，重寫代碼如下
代碼如下
package com.taotao.common.utils;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
public class SimpleAuthenticator extends Authenticator {
private String username;
private String password;
public SimpleAuthenticator(String username, String password) {
super();
this.username = username;
this.password = password;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
// TODO Auto-generated method stub
return new PasswordAuthentication(username, password);
}
}
再次運行發送成功
DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM XOAUTH2 DEBUG SMTP: Using mechanism LOGIN DEBUG SMTP: AUTH LOGIN command trace suppressed DEBUG SMTP: AUTH LOGIN succeeded DEBUG SMTP: use8bit false MAIL FROM:<[email protected]> 250 ok RCPT TO:<[email protected]> 250 ok DEBUG SMTP: Verified Addresses DEBUG SMTP: [email protected] DATA 354 End data with <CR><LF>.<CR><LF> Date: Fri, 14 Dec 2018 20:26:37 +0800 (CST) From: [email protected] To: [email protected]
javamail郵件發送