JavaMail 发送邮件系列(一)：发送基本邮件

使用JavaMail API发送邮件，大概分为三个类：MyAuthenticator---密码认证器，MailSendInfo--邮件发送消息集合，MailSendUtils--邮件发送消息注入执行

Maven依赖

<dependency >
    <groupId > javax.mail </ groupId >
    <artifactId > mail </ artifactId >
    <version > 1.4.5 </ version >
</dependency >
<dependency >
    <groupId > com.sun.mail </ groupId >
    <artifactId > javax.mail </ artifactId >
    <version > 1.5.4 </ version >
</dependency >

MyAuthenticator

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class MyAuthenticator extends Authenticator {
	private String userName = null;
	private String password = null;

	public MyAuthenticator() {
	}

	public MyAuthenticator(String username, String password) {
		this.userName = username;
		this.password = password;
	}

	protected PasswordAuthentication getPasswordAuthentication() {
		return new PasswordAuthentication(userName, password);
	}
}

MailSendInfo

import java.util.Properties;

public class MailSenderInfo {
    // 发送邮件的服务器的IP和端口
    private String mailServerHost;
    private String mailServerPort = "25";
    // 邮件发送者的地址
    private String fromAddress;
    // 登陆邮件发送服务器的用户名和密码
    private String userName;
    private String password;
    // 是否需要身份验证
    private boolean validate = false;
    // 邮件主题
    private String subject;
    // 邮件的文本内容
    private String content;
    // 邮件接收者的地址
    private String[] toAddress;

    /**
     * 获得邮件会话属性
     */
    public Properties getProperties() {
        Properties p = new Properties();
        p.put("mail.smtp.host", this.mailServerHost);
        p.put("mail.smtp.port", this.mailServerPort);
        p.put("mail.smtp.auth", validate ? "true" : "false");
        return p;
    }

    public String[] getToAddress() {
        return toAddress;
    }

    public void setToAddress(String[] toAddress) {
        this.toAddress = toAddress;
    }

    public String getMailServerHost() {
        return mailServerHost;
    }

    public void setMailServerHost(String mailServerHost) {
        this.mailServerHost = mailServerHost;
    }

    public String getMailServerPort() {
        return mailServerPort;
    }

    public void setMailServerPort(String mailServerPort) {
        this.mailServerPort = mailServerPort;
    }

    public boolean isValidate() {
        return validate;
    }

    public void setValidate(boolean validate) {
        this.validate = validate;
    }

    public String getFromAddress() {
        return fromAddress;
    }

    public void setFromAddress(String fromAddress) {
        this.fromAddress = fromAddress;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String textContent) {
        this.content = textContent;
    }
}

MailSendUtils

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

import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class MailSendUtils {
    private MailSenderInfo mailInfo = new MailSenderInfo();

    public MailSendUtils(String subject, String message,String toAddress) {
        mailInfo.setMailServerHost("smtp.163.com");
        mailInfo.setMailServerPort("25");
        mailInfo.setValidate(true);
        mailInfo.setUserName("[email protected]");
        mailInfo.setPassword("willsmith228");
        mailInfo.setFromAddress("[email protected]");
        mailInfo.setToAddress(new String[]{toAddress});
        mailInfo.setSubject(subject);
        mailInfo.setContent(message);
    }

    /**
     * 以TEXT格式发送邮件
     * 
     */
    public boolean sendTextMail() {
        // 判断是否需要身份认证
        MyAuthenticator authenticator = null;
        Properties pro = mailInfo.getProperties();
        if (mailInfo.isValidate()) {
            // 如果需要身份认证，则创建一个密码验证器
            authenticator = new MyAuthenticator(mailInfo.getUserName(),
                    mailInfo.getPassword());
        }
        // 根据邮件会话属性和密码验证器构造一个发送邮件的session
        Session sendMailSession = Session
                .getDefaultInstance(pro, authenticator);
        try {
            // 根据session创建一个邮件消息
            Message mailMessage = new MimeMessage(sendMailSession);
            // 创建邮件发送者地址
            Address from = new InternetAddress(mailInfo.getFromAddress());
            // 设置邮件消息的发送者
            mailMessage.setFrom(from);
            // 创建邮件的接收者地址，并设置到邮件消息中
            String[] ToAddresses = mailInfo.getToAddress();
            Address[] addressList = new InternetAddress[ToAddresses.length];
            for (int i = 0; i < ToAddresses.length; i++) {
                addressList[i] = new InternetAddress(ToAddresses[i]);
            }
            // Message.RecipientType.TO属性表示接收者的类型为TO
            mailMessage.setRecipients(Message.RecipientType.TO, addressList);
            // 设置邮件消息的主题
            mailMessage.setSubject(mailInfo.getSubject());
            // 设置邮件消息发送的时间
            mailMessage.setSentDate(new Date());
            // 设置邮件消息的主要内容
            String mailContent = mailInfo.getContent();
            mailMessage.setText(mailContent);
            // 发送邮件
            Transport.send(mailMessage);
            return true;
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false;
    }

    /**
     * 以HTML格式发送邮件
     * 
     */
    public boolean sendHtmlMail() {
        // 判断是否需要身份认证
        MyAuthenticator authenticator = null;
        Properties pro = mailInfo.getProperties();
        // 如果需要身份认证，则创建一个密码验证器
        if (mailInfo.isValidate()) {
            authenticator = new MyAuthenticator(mailInfo.getUserName(),
                    mailInfo.getPassword());
        }
        // 根据邮件会话属性和密码验证器构造一个发送邮件的session
        Session sendMailSession = Session
                .getDefaultInstance(pro, authenticator);
        try {
            // 根据session创建一个邮件消息
            Message mailMessage = new MimeMessage(sendMailSession);
            // 创建邮件发送者地址
            Address from = new InternetAddress(mailInfo.getFromAddress());
            // 设置邮件消息的发送者
            mailMessage.setFrom(from);
            // 创建邮件的接收者地址，并设置到邮件消息中
            String[] ToAddresses = mailInfo.getToAddress();
            Address[] addressList = new InternetAddress[ToAddresses.length];
            for (int i = 0; i < ToAddresses.length; i++) {
                addressList[i] = new InternetAddress(ToAddresses[i]);
            }
            // Message.RecipientType.TO属性表示接收者的类型为TO
            mailMessage.setRecipients(Message.RecipientType.TO, addressList);
            // 设置邮件消息的主题
            mailMessage.setSubject(mailInfo.getSubject());
            // 设置邮件消息发送的时间
            mailMessage.setSentDate(new Date());
            // MiniMultipart类是一个容器类，包含MimeBodyPart类型的对象
            Multipart mainPart = new MimeMultipart();
            // 创建一个包含HTML内容的MimeBodyPart
            BodyPart html = new MimeBodyPart();
            // 设置HTML内容
            html.setContent(mailInfo.getContent(), "text/html; charset=utf-8");
            mainPart.addBodyPart(html);
            // 将MiniMultipart对象设置为邮件内容
            mailMessage.setContent(mainPart);
            // 发送邮件
            Transport.send(mailMessage);
            return true;
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false;
    }
}

MailTest

public class MailTest {

    public static void main(String[] args) {
        MailSendUtils sms = new MailSendUtils("this is title", "this is content", "[email protected]");
        System.out.println(sms.sendTextMail());
    }

}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.cnooc.commons</groupId>
	<artifactId>CPURecordMonitor</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>CPURecordMonitor</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.7</version>
			<scope>test</scope>
		</dependency>
        
        <dependency >
            <groupId >javax.mail </groupId >
            <artifactId >mail </artifactId >
            <version >1.4.5 </version >
        </dependency >
        <dependency >
            <groupId >com.sun.mail </groupId >
            <artifactId >javax.mail </artifactId >
            <version >1.5.4 </version >
        </dependency >
    </dependencies >


    <build >
        <finalName >CPURecordMonitor </finalName >
        <plugins >
            <plugin >
                <groupId >org.apache.maven.plugins </groupId >
                <artifactId >maven-compiler-plugin</artifactId >
                <configuration >
                    <source >1.7 </source >
                    <target >1.7 </target >
                </configuration >
            </plugin >
        </plugins >
    </build >

</project>

中途遇到两个错误

java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger

java.lang.NoClassDefFoundError: javax/mail/MessagingException

解决方案参考：
http://blog.csdn.net/u013361445/article/details/49663329

Demon下载：http://download.csdn.net/detail/u013361445/9246365

建议下载完毕后自己敲一遍代码，有助于理解。