javamail的smtp方式发送邮件实例

本实例为javamail发送smtp邮件实例和常见问题解决

package mail;

import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/** *//**
* 发送普通邮件，接受普通邮件 发送带有附件的邮件，接收带有附件的邮件 发送html形式的邮件，接受html形式的邮件 发送带有图片的邮件等做了一个总结。
*/
public class Test
{
// 邮箱服务器
private String host = "smtp.163.com";
// 这个是你的邮箱用户名 用户名一般为xxx@163.com中的xxx 但当确认无误时依然是认证错误可以修改为xxx@163.com全名测试
private String username = "******";
// 你的邮箱密码
private String password = "******";

private String mail_head_name = 
"this is head of this mail";

private String mail_head_value = 
"this is head of this mail";

private String mail_to = "zdw@live.cn";

private String mail_from = 
"*****@163.com";

private String mail_subject = 
"this is the subject of this test mail";

private String mail_body = 
"this is the mail_body of this test mail";

private String personalName = 
"我的邮件";

public Test()
{
}

/** *//**
* 此段代码用来发送普通电子邮件
*/
public void send() 
throws Exception
{
try
{
Properties props = new Properties(); 
// 获取系统环境
Authenticator auth = new Email_Autherticator(); 
// 进行邮件服务器用户认证
props.put("mail.smtp.host", host);
props.put("mail.smtp.auth", 
"true");
Session session = Session.getDefaultInstance(props, auth);
// 设置session,和邮件服务器进行通讯。
MimeMessage message = new MimeMessage(session);
// message.setContent("foobar, "application/x-foobar"); // 设置邮件格式
message.setSubject(mail_subject); // 设置邮件主题
message.setText(mail_body); // 设置邮件正文
message.setHeader(mail_head_name, mail_head_value); // 设置邮件标题
message.setSentDate(new Date()); 
// 设置邮件发送日期
Address address = new InternetAddress(mail_from, personalName);
message.setFrom(address); // 设置邮件发送者的地址
Address toAddress = new InternetAddress(mail_to);
// 设置邮件接收方的地址
message.addRecipient(Message.RecipientType.TO, toAddress);
Transport.send(message); // 发送邮件
System.out.println("send ok!");
} catch (Exception ex)
{
ex.printStackTrace();
throw new Exception(ex.getMessage());
}
}

/** *//**
* 用来进行服务器对用户的认证
*/
public class Email_Autherticator
extends Authenticator
{
public Email_Autherticator()
{
super();
}

public Email_Autherticator(String user, String pwd)
{
super();
username = user;
password = pwd;
}

public PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(username, password);
}
}

public static 
void main(String[] args)
{
Test sendmail = new Test();
try
{
sendmail.send();
} catch (Exception ex)
{
}
}

}

常见错误