在Java中发送电子邮件

企业开发 2018-05-10 08:40:43 阅读次数: 0
要先申请一个网易的126邮箱和一个新浪的com邮箱。

以下程序需要3个jar包的支持:
javax.mail-1.5.1.jar
activation-1.1.1.jar
org.springframework.context.support-3.x.x.RELEASE.jar

applicationContext.xml中的代码如下: 
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host">
            <value>smtp.126.com</value>
        </property>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtp.auth">true</prop>
                <prop key="mail.smtp.timeout">25000</prop>
            </props>
        </property>
        <property name="username">
            <value>testmyname</value>
        </property>
        <property name="password">
            <value>xxxxxx</value>
        </property>
    </bean>


TestJavaMailSend.java代码如下: 
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.mail.javamail.MimeMessagePreparator;

public class TestJavaMailSend {

	public static void main(String[] args) throws MessagingException {
		ApplicationContext ctx = new FileSystemXmlApplicationContext("src-resources/applicationContext.xml");
        JavaMailSender sender = (JavaMailSender) ctx.getBean("mailSender");
        TestJavaMailSend javaMailSend = new TestJavaMailSend();
        
        //测试发送只有文本信息的简单测试
        javaMailSend.sendTextMail(sender);
        
        //测试发送HTML内容的邮件
        javaMailSend.sendHtmlMail(sender);
        
        //测试发送带附件的邮件
        javaMailSend.sendMimeMessage(sender);
	}
	
	/**
     * 测试发送只有文本信息的简单测试
     * @param sender 邮件发送器
     * @throws Exception
     */
    private void sendTextMail(JavaMailSender sender) {
        SimpleMailMessage mail = new SimpleMailMessage();
        mail.setTo("[email protected]");
        mail.setFrom("[email protected]");
        mail.setSubject("我是中文邮件主题!");
        mail.setText("spring Mail的简单!@#$%$%^%&^^%&*()\":|}OIYUDS~~<>?\":DFGSDSD测试");
        sender.send(mail);
        
        System.out.println("成功发送文本邮件！");
    }
    
    /**
     * 测试发送HTML内容的邮件
     * @param sender 邮件发送器
     * @throws MessagingException 
     * @throws Exception
     */
    private void sendHtmlMail(JavaMailSender sender) throws MessagingException {
    	MimeMessage msg = sender.createMimeMessage();  
        MimeMessageHelper message = new MimeMessageHelper(msg, true, "UTF-8");
        
        message.setFrom("[email protected]");  
        message.setSubject("我是中文HTML邮件主题");  
        message.setTo("[email protected]");  //这个地方传入数组可以发送给多人
        //message.setCc("[email protected]");  //抄送地址,传入数组也可以抄送多人
        String htmlContent = "<html><head><title>htmlttt</title><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /></head><body><table border=\"1\"><tr><td>第一列</td><td>第二列</td></tr><tr><td colspan=\"2\"><img src=\"cid:shihuantp\"></td></tr></table></body></html>";
        message.setText(htmlContent, true);  //如果发的不是html内容去掉true参数
        
        // add the image (图片会嵌入到邮件里显示出来)
        FileSystemResource image = new FileSystemResource(new File("H:/我的像册/摇大旗.JPG"));
        message.addInline("shihuantp", image);   //这里的shihuantp一定要跟<img src=\"cid:shihuantp\">中cid后面的值一样
        
        sender.send(msg);
        
        System.out.println("成功发送Html邮件！");
    }
    
    /**
     * 发送带附件的邮件
     * @param sender 邮件发送器 
     * @throws Exception
     */
    private void sendMimeMessage(final JavaMailSender sender) {
        //附件文件集合
        final List files = new ArrayList();
        MimeMessagePreparator mimeMail = new MimeMessagePreparator() {
            public void prepare(MimeMessage mimeMessage) throws MessagingException, UnsupportedEncodingException {
                mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
                mimeMessage.setFrom(new InternetAddress("[email protected]"));
                mimeMessage.setSubject("Spring发送带附件的邮件-修改了附件编码", "UTF-8"); 
                
                Multipart mp = new MimeMultipart();
                
                //向Multipart添加正文
                MimeBodyPart content = new MimeBodyPart();
                content.setText("内含spring邮件发送的例子，请查收!");
                
                //向MimeMessage添加（Multipart代表正文）
                mp.addBodyPart(content);
                files.add("H:/myfiledirectpry/velocity-1.7.jar");
                files.add("H:/myfiledirectpry/commons-email-1.3.2-bin.zip");
                files.add("H:/myfiledirectpry/我的备忘录.xls");
                
                //向Multipart添加附件
                Iterator it = files.iterator();
                while(it.hasNext()) {
                    MimeBodyPart attachFile = new MimeBodyPart();
                    String filename = it.next().toString();
                    FileDataSource fds = new FileDataSource(filename);
                    attachFile.setDataHandler(new DataHandler(fds));
                    attachFile.setFileName(MimeUtility.encodeWord(fds.getName()));
                    mp.addBodyPart(attachFile);
                }
                
                files.clear();
                
                //向Multipart添加MimeMessage
                mimeMessage.setContent(mp);
                mimeMessage.setSentDate(new Date());
            }
        };

        //发送带附件的邮件
        sender.send(mimeMail);
        
        System.out.println("成功发送带附件邮件!");
    }

}


上面的TestJavaMailSend.java是笔者做测试用的，下面笔者对测试的代码进行了封装: 
package com.shihuan.core.common.mail;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.mail.javamail.MimeMessagePreparator;

public class SendEmail {
	
	protected static Logger logger = LoggerFactory.getLogger(SendEmail.class);

	/**
     * 功能: 发送只有文本信息的简单测试
     * @param request HttpServletRequest对象
     * @param fromSender 发送方地址  (例如: [email protected])
     * @param toDestination 接收方地址  (例如: [email protected])
     * @param emailSubject 邮件主题
     * @param emailContent 邮件正文   (例如: "你好!I am Student!")
     */
    public static void sendTextMail(HttpServletRequest request, String fromSender, String toDestination, String emailSubject, String emailContent) {
    	ApplicationContext ctx = (ApplicationContext) request.getSession().getServletContext().getAttribute("ac");
        JavaMailSender sender = (JavaMailSender) ctx.getBean("mailSender");
    	
        SimpleMailMessage mail = new SimpleMailMessage();
        mail.setFrom(fromSender);
        mail.setTo(toDestination);
        mail.setSubject(emailSubject);
        mail.setText(emailContent);
        sender.send(mail);
        
        logger.info("成功发送文本邮件!");
    }
    
    /**
     * 功能: 发送HTML内容的邮件
     * @param request HttpServletRequest对象
     * @param fromSender 发送方地址  (例如: [email protected])
     * @param toDestination 接收方地址  (例如: [email protected])
     * @param emailSubject 邮件主题
     * @param emailContent 邮件正文   (例如: "<html><head><title>htmlttt</title><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /></head><body><table border=\"1\"><tr><td>第一列</td><td>第二列</td></tr><tr><td colspan=\"2\"><img src=\"cid:shihuantp\"></td></tr></table></body></html>")
     * @param imageMap 在邮件中预显示的图片  (例如: map.put("shihuantp", "E:/我的像册/摇大旗.JPG"); map.put("mtytp", "E:/我的像册/海豚馆.JPG");)
     * @throws MessagingException
     */
    public static void sendHtmlMail(HttpServletRequest request, String fromSender, String toDestination, String emailSubject, String emailContent, Map<String, String> imageMap) throws MessagingException {
    	ApplicationContext ctx = (ApplicationContext) request.getSession().getServletContext().getAttribute("ac");
        JavaMailSender sender = (JavaMailSender) ctx.getBean("mailSender");
    	
    	MimeMessage msg = sender.createMimeMessage();  
        MimeMessageHelper message = new MimeMessageHelper(msg, true, "UTF-8");
        
        message.setFrom(fromSender);  
        message.setTo(toDestination);
        message.setSubject(emailSubject);
//        String htmlContent = "<html><head><title>htmlttt</title><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" /></head><body><table border=\"1\"><tr><td>第一列</td><td>第二列</td></tr><tr><td colspan=\"2\"><img src=\"cid:shihuantp\"></td></tr></table></body></html>";
        message.setText(emailContent, true);  //如果发的不是html内容去掉true参数
        
        // add the image (图片会嵌入到邮件里显示出来)
        //FileSystemResource image = new FileSystemResource(new File("E:/我的像册/摇大旗.JPG"));
        //message.addInline("shihuantp", image);   //这里的shihuantp一定要跟<img src=\"cid:shihuantp\">中cid后面的值一样
        
        FileSystemResource image = null;
        Iterator iter = imageMap.keySet().iterator();
        while (iter.hasNext()) {
			String key = (String)iter.next();
			String value = imageMap.get(key);
			image = new FileSystemResource(new File(value));
			message.addInline(key, image);
		}
        
        sender.send(msg);
        
        logger.info("成功发送Html邮件!");
    }
    
    /**
     * 功能: 发送带附件的邮件
     * @param request HttpServletRequest对象
     * @param fromSender 发送方地址  (例如: [email protected])
     * @param toDestination 接收方地址  (例如: [email protected])
     * @param emailSubject 邮件主题
     * @param emailContent 邮件正文   (例如: "你好!I am Student!")
     * @param attachments 邮件附件的绝对路径  (例如: new String[]{"E:/myserver/velocity-1.7.jar", "E:/myserver/commons-email-1.3.2-bin.zip", "E:/myserver/我的备忘录.xls"})
     */
    public static void sendMimeMessage(HttpServletRequest request, final String fromSender, final String toDestination, final String emailSubject, final String emailContent, final String[] attachments) {
    	ApplicationContext ctx = (ApplicationContext) request.getSession().getServletContext().getAttribute("ac");
        JavaMailSender sender = (JavaMailSender) ctx.getBean("mailSender");
    	
        //附件文件集合
        final List files = new ArrayList();
        MimeMessagePreparator mimeMail = new MimeMessagePreparator() {
            public void prepare(MimeMessage mimeMessage) throws MessagingException, UnsupportedEncodingException {
            	mimeMessage.setFrom(new InternetAddress(fromSender));
                mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(toDestination));
                mimeMessage.setSubject(emailSubject, "UTF-8"); 
                
                Multipart mp = new MimeMultipart();
                
                //向Multipart添加正文
                MimeBodyPart content = new MimeBodyPart();
                content.setText(emailContent);
                
                //向MimeMessage添加（Multipart代表正文）
                mp.addBodyPart(content);
                for (int i = 0; i < attachments.length; i++) {
                	files.add(attachments[i]);
				}
                
                //向Multipart添加附件
                Iterator it = files.iterator();
                while(it.hasNext()) {
                    MimeBodyPart attachFile = new MimeBodyPart();
                    String filename = it.next().toString();
                    FileDataSource fds = new FileDataSource(filename);
                    attachFile.setDataHandler(new DataHandler(fds));
                    attachFile.setFileName(MimeUtility.encodeWord(fds.getName()));
                    mp.addBodyPart(attachFile);
                }
                
                files.clear();
                
                //向Multipart添加MimeMessage
                mimeMessage.setContent(mp);
                mimeMessage.setSentDate(new Date());
            }
        };

        //发送带附件的邮件
        sender.send(mimeMail);
        
        logger.info("成功发送带附件邮件!");
    }
	
}

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