java mail api 使用

 

所需要的jar包： http://pan.baidu.com/s/1qWGZRJm

 

如果遇到这个错误：在windows防火墙允许 javaw.exe访问网络.或者关闭防火墙

FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_INIT(197)
ERROR: transport error 202: connect failed: Connection timed out
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [../../../src/share/back/debugInit.c:750]

如果你使用qq邮箱，将会遇到这个错误

454 Authentication failed, please open smtp flag first!

在QQ邮箱的设置里面，找到账户-> POP3/IMAP/SMTP选择开启POP3/SMTP服务

package study;

import java.util.Date;
import java.util.Properties;
import java.util.Scanner;

import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class email
{
    public static void main(String [] args) throws MessagingException
    {
        final String userName="[email protected]";       //设置发件人用户名
        final String password="*********";             //设置发件人密码
        Properties pro=new Properties();
        pro.put("mail.smtp.host", "smtp.qq.com");
        // 设置发送邮件端口号
        pro.put("mail.smtp.port", "25");
        // 设置邮件发送需要认证
        pro.put("mail.smtp.auth", "true");
        // 创建邮件验证信息，即发送邮件的用户名和密码
         
        Authenticator authenticator = new Authenticator() {
     
        protected PasswordAuthentication getPasswordAuthentication() {
        // 重写验证方法，填写用户名，密码
        return new PasswordAuthentication(userName, password);
        }
        };
        // 根据邮件会话 构建一个邮件的session
        Session sendMailSession = Session.getDefaultInstance(pro, authenticator);
        // 创建一个邮件消息
        Message message = new MimeMessage(sendMailSession);
        // 创建邮件发送者地址
        Address sourceAddress = new InternetAddress(userName);
        // 将原地址设置到消息的信息中
        message.setFrom(sourceAddress);
        // 创建邮件的接收者地址
        Address destAddress = new InternetAddress("[email protected]");
        // 将接收者的地址设置到消息的信息中
        message.setRecipient(Message.RecipientType.TO, destAddress);
        // 设置邮件的主题
        message.setSubject("Merry Christmas!");
        // 设置邮件的发送内容
        message.setText("Hi there,Merry Christmas!");
 
        Transport.send(message);;
        System.out.print("your Email send successful\n");
    }

 
    
    }