【Java】-【使用smtp协议发邮件】

目前163和qq邮箱支持SMTP协议，本文以qq邮箱为例，163邮箱和这个思路一样
场景：使用qq邮箱给xx邮箱发一条邮件，那么你一定要获得qq邮箱的授权码，在设置-账户里找到以下内容，开启服务获得授权码，如果你已经开启了，那么点击生成授权码获得授权码：

POM.xml中导入以下依赖：

	<dependencies>
        <dependency>
            <groupId>org.apache.xbean</groupId>
            <artifactId>xbean-spring</artifactId>
            <version>3.7</version>
        </dependency>
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.5</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
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在classpath路径下（我是src/main/resources）新建mail.properties配置文件，配置内容如下：

email.host=smtp.qq.com
email.port=465
email.from=809476070@qq.com
username=809476070@qq.com
password=授权码
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注意：

1. email.host为服务器域名，不要加http/https，163邮箱默认为smtp.163.com
2. email.port为端口号，配置465或587，25已经弃用了
3. email.from发件人邮箱地址
4. username发件人用户名
5. password授权码，不是邮箱密码

核心代码：

import javax.mail.*;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;
import java.util.ResourceBundle;

public class EmailHelper {
    private static final ResourceBundle bundle = ResourceBundle.getBundle("mail");
    private static final String sendFrom = bundle.getString("email.from");
    private static final String username = bundle.getString("username");
    private static final String password = bundle.getString("password");
    private static final String host = bundle.getString("email.host");

    public static void sendEmail(String someone, String subject, String content){
        Properties props = new Properties();
        props.setProperty("mail.host", host);
        props.setProperty("mail.smtp.auth", "true");

        Authenticator authenticator = new Authenticator(){
            @Override
            public javax.mail.PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username,password);
            }
        };
        Session session = Session.getDefaultInstance(props, authenticator);
        session.setDebug(true);
        Message message = new MimeMessage(session);
        try {
            message.setFrom(new InternetAddress(sendFrom));
            message.setRecipients(MimeMessage.RecipientType.TO,InternetAddress.parse(someone));
            //message.setRecipients(RecipientType.TO,InternetAddress.parse("测试的接收的邮件多个以逗号隔开"));
            try {
                message.setSubject(subject);
                message.setContent(content,"text/html;charset=UTF-8");
                Transport.send(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}
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测试代码：

import org.junit.Test;
public class test {
    @Test
    public  void  tsetemail(){
        String content ="Hello,This is a test email!!!!";
        //参数分别为接收者邮箱、title、内容body
        EmailHelper.sendEmail("809476070@zjtlcb.com", "标题", content);
    }
}
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