javamail发送邮件

POM

<?xml version="1.0" encoding="UTF-8"?>
<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>maventest</groupId>
  <artifactId>maventest</artifactId>
  <version>1.0-SNAPSHOT</version>

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
    </dependency>

    <dependency>
      <groupId>javax.mail</groupId>
      <artifactId>mail</artifactId>
      <version>1.4.7</version>
    </dependency>

  </dependencies>
</project>

1、main

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class Main {

    public static void main(String[] args) {
        boolean sslEnable = false;
        String userName = "ssb@daixinet.com";
        String password = "****";
        // 发送邮件
        String smtpHost = "smtp.mxhichina.com";
        String smtpPort = "25";
        String mailSubject = "test mail" + new Date().toString();
        String mailBody = "test mail";
        List<String> toAddress = new ArrayList<String>();
        toAddress.add("zyl@daixinet.com");
        List<EmailAttachment> attachmentList = new ArrayList<EmailAttachment>();
        EmailAttachment emailAttachment = new EmailAttachment();
        attachmentList.add(emailAttachment);
        emailAttachment.setFileName("01.txt");
        File file = new File("D:\01.txt");
        try {
            InputStream inputStream = new FileInputStream(file);
            ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
            byte[] b = new byte[1000];
            int n;
            while ((n = inputStream.read(b)) != -1) {
                bos.write(b, 0, n);
            }
            inputStream.close();
            bos.close();
            emailAttachment.setAttachment(bos.toByteArray());
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        // 接收邮件
        String pop3Host = "pop3.mxhichina.com";
        String pop3Port = "110";
        IReceiveHandle receiveHandle = new MyReceiveHandle();

        MailUtil mailUtil = new MailUtil();
        mailUtil.setSslEnable(sslEnable);
        mailUtil.setUserName(userName);
        mailUtil.setPassword(password);
        mailUtil.setSmtpHost(smtpHost);
        mailUtil.setSmtpPort(smtpPort);
        mailUtil.setMailSubject(mailSubject);
        mailUtil.setMailBody(mailBody);
        mailUtil.setToAddress(toAddress);
        mailUtil.setAttachmentList(attachmentList);
        mailUtil.setPop3Host(pop3Host);
        mailUtil.setPop3Port(pop3Port);
        mailUtil.setiReceiveHandle(receiveHandle);

        try {
            //mailUtil.Send();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }

        try {
            mailUtil.Receive();
        } catch (Exception e) {
            e.printStackTrace();
        }

        System.out.println("End");
    }
}

2、MailUtil

import com.sun.mail.pop3.POP3Folder;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;


public class MailUtil {
    private boolean sslEnable;
    private String userName;
    private String password;
    // 发送邮件
    private String smtpHost;
    private String smtpPort = "25";
    private String mailSubject;
    private String mailBody;
    private List<String> toAddress = new ArrayList<String>();
    private List<EmailAttachment> attachmentList = new ArrayList<EmailAttachment>();
    // 接收邮件
    private String pop3Host;
    private String pop3Port = "110";
    private IReceiveHandle iReceiveHandle;

    public boolean isSslEnable() {
        return sslEnable;
    }

    public void setSslEnable(boolean sslEnable) {
        this.sslEnable = sslEnable;
    }

    public String getUserName() {
        return userName;
    }

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

    public String getPassword() {
        return password;
    }

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

    public String getSmtpHost() {
        return smtpHost;
    }

    public void setSmtpHost(String smtpHost) {
        this.smtpHost = smtpHost;
    }

    public String getSmtpPort() {
        return smtpPort;
    }

    public void setSmtpPort(String smtpPort) {
        this.smtpPort = smtpPort;
    }

    public String getMailSubject() {
        return mailSubject;
    }

    public void setMailSubject(String mailSubject) {
        this.mailSubject = mailSubject;
    }

    public String getMailBody() {
        return mailBody;
    }

    public void setMailBody(String mailBody) {
        this.mailBody = mailBody;
    }

    public List<String> getToAddress() {
        return toAddress;
    }

    public void setToAddress(List<String> toAddress) {
        this.toAddress = toAddress;
    }

    public List<EmailAttachment> getAttachmentList() {
        return attachmentList;
    }

    public void setAttachmentList(List<EmailAttachment> attachmentList) {
        this.attachmentList = attachmentList;
    }

    public String getPop3Host() {
        return pop3Host;
    }

    public void setPop3Host(String pop3Host) {
        this.pop3Host = pop3Host;
    }

    public String getPop3Port() {
        return pop3Port;
    }

    public void setPop3Port(String pop3Port) {
        this.pop3Port = pop3Port;
    }

    public IReceiveHandle getiReceiveHandle() {
        return iReceiveHandle;
    }

    public void setiReceiveHandle(IReceiveHandle iReceiveHandle) {
        this.iReceiveHandle = iReceiveHandle;
    }

    // 公共方法

    public void Send() throws Exception {
        try {
            // 属性封装
            Properties props = System.getProperties();
            props.put("mail.pop3.ssl.enable", sslEnable);
            props.put("mail.smtp.host", smtpHost);
            props.put("mail.stmp.port", smtpPort);
            props.put("mail.smtp.auth", "true");
            // 验证
            MailAuthenticator authenticator = new MailAuthenticator(userName, password);
            Session session = Session.getDefaultInstance(props, authenticator);
            // 信息
            Message msg = new MimeMessage(session);
            msg.setFrom(new InternetAddress(userName));
            if (toAddress.size() < 1) {
                throw new Exception("发送地址为空");
            }
            InternetAddress[] address = new InternetAddress[toAddress.size()];
            for (int idx = 0; idx < toAddress.size(); idx++) {
                address[idx] = new InternetAddress(toAddress.get(idx));
            }
            msg.setRecipients(Message.RecipientType.TO, address);
            msg.setSubject(mailSubject);
            // 邮件内容
            Multipart multipart = new MimeMultipart();
            msg.setContent(multipart);
            // 邮件正文
            BodyPart bodyPart = new MimeBodyPart();
            multipart.addBodyPart(bodyPart);
            bodyPart.setText(mailBody);
            // 邮件附件
            List<File> files = new ArrayList<File>();
            if (attachmentList.size() > 0) {
                for (EmailAttachment emailAttachment : attachmentList) {
                    bodyPart = new MimeBodyPart();
                    multipart.addBodyPart(bodyPart);
                    bodyPart.setFileName(emailAttachment.getFileName());
                    // 创建文件
                    File file = new File(emailAttachment.getFileName());
                    files.add(file);
                    if (file.exists()) {
                        file.delete();
                    }
                    file.createNewFile();
                    OutputStream outputStream = new FileOutputStream(file);
                    outputStream.write(emailAttachment.getAttachment());
                    outputStream.close();

                    DataSource source = new FileDataSource(file);
                    bodyPart.setDataHandler(new DataHandler(source));
                }
            }
            // 发送邮件
            Transport.send(msg);
            // 删除附件
            for (File file : files) {
                if (file.exists()) {
                    file.delete();
                }
            }
        } catch (Exception ex) {
            throw ex;
        }
    }

    public void Receive() throws Exception {
        Store store = null;
        Folder folder = null;
        try {
            // 属性封装
            Properties props = System.getProperties();
            props.put("mail.pop3.ssl.enable", sslEnable);
            props.put("mail.pop3.host", pop3Host);
            props.put("mail.pop3.port", pop3Port);
            // 验证
            Session session = Session.getDefaultInstance(props);
            store = session.getStore("pop3");
            store.connect(userName, password);

            folder = store.getFolder("INBOX");
            folder.open(Folder.READ_ONLY);

            int size = folder.getMessageCount();
            Message messages[] = folder.getMessages();
            for (int idx = 0; idx < size; idx++) {
                if (iReceiveHandle == null) {
                    break;
                }
                // 1、UID
                MimeMessage message = (MimeMessage) folder.getMessage(idx + 1);
                POP3Folder inbox = (POP3Folder) folder;
                String uid = inbox.getUID(message);
                // 根据UID判断是否需要接收
                boolean isNeedReceive = iReceiveHandle.isNeedReceive(uid);
                if (!isNeedReceive) {
                    continue;
                }
                // 2、ReceiveEmail 对象
                ReceiveEmail receiveEmail = new ReceiveEmail();
                Date sentDate = message.getSentDate();
                String from = message.getFrom()[0].toString();
                String subject = message.getSubject();
                String content = getMailContent(messages[idx]);
                receiveEmail.setSentDate(sentDate);
                receiveEmail.setFrom(from);
                receiveEmail.setSubject(subject);
                // TODO:邮件内容、附件
                receiveEmail.setContent(content);
                boolean isContainAttach = isContainAttach(messages[idx]);
                if (isContainAttach) {
                    //saveAttachMent(messages[idx]);
                }
                // 传递参数
                iReceiveHandle.handle(receiveEmail);
            }
        } catch (Exception ex) {
            throw ex;
        } finally {
            try {
                if (folder != null) {
                    folder.close(false);
                }
                if (store != null) {
                    store.close();
                }
            } catch (MessagingException e) {
                e.printStackTrace();
            }
        }
    }

    private String getMailContent(Part part) throws Exception {
        StringBuffer rtn = new StringBuffer();

        String contenttype = part.getContentType();
        int nameindex = contenttype.indexOf("name");
        boolean conname = false;
        if (nameindex != -1)
            conname = true;
        //System.out.println("CONTENTTYPE: " + contenttype);
        if (part.isMimeType("text/plain") && !conname) {
            rtn.append((String) part.getContent());
        } else if (part.isMimeType("text/html") && !conname) {
            rtn.append((String) part.getContent());
        } else if (part.isMimeType("multipart/*")) {
            Multipart multipart = (Multipart) part.getContent();
            int counts = multipart.getCount();
            for (int i = 0; i < counts; i++) {
                getMailContent(multipart.getBodyPart(i));
            }
        } else if (part.isMimeType("message/rfc822")) {
            getMailContent((Part) part.getContent());
        } else {
        }

        return rtn.toString();
    }

    private boolean isContainAttach(Part part) throws Exception {
        boolean attachflag = false;
        String contentType = part.getContentType();
        if (part.isMimeType("multipart/*")) {
            Multipart mp = (Multipart) part.getContent();
            for (int i = 0; i < mp.getCount(); i++) {
                BodyPart mpart = mp.getBodyPart(i);
                String disposition = mpart.getDisposition();
                if ((disposition != null)
                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition
                        .equals(Part.INLINE))))
                    attachflag = true;
                else if (mpart.isMimeType("multipart/*")) {
                    attachflag = isContainAttach((Part) mpart);
                } else {
                    String contype = mpart.getContentType();
                    if (contype.toLowerCase().indexOf("application") != -1)
                        attachflag = true;
                    if (contype.toLowerCase().indexOf("name") != -1)
                        attachflag = true;
                }
            }
        } else if (part.isMimeType("message/rfc822")) {
            attachflag = isContainAttach((Part) part.getContent());
        }
        return attachflag;
    }

    private void saveAttachMent(Part part) throws Exception {
        String fileName = "";
        if (part.isMimeType("multipart/*")) {
            Multipart mp = (Multipart) part.getContent();
            for (int i = 0; i < mp.getCount(); i++) {
                BodyPart mpart = mp.getBodyPart(i);
                String disposition = mpart.getDisposition();
                if ((disposition != null)
                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition
                        .equals(Part.INLINE)))) {
                    fileName = mpart.getFileName();
                    if (fileName.toLowerCase().indexOf("gb2312") != -1) {
                        fileName = MimeUtility.decodeText(fileName);
                    }
                    saveFile(fileName, mpart.getInputStream());
                } else if (mpart.isMimeType("multipart/*")) {
                    saveAttachMent(mpart);
                } else {
                    fileName = mpart.getFileName();
                    if ((fileName != null)
                            && (fileName.toLowerCase().indexOf("GB2312") != -1)) {
                        fileName = MimeUtility.decodeText(fileName);
                        saveFile(fileName, mpart.getInputStream());
                    }
                }
            }
        } else if (part.isMimeType("message/rfc822")) {
            saveAttachMent((Part) part.getContent());
        }
    }

    private void saveFile(String fileName, InputStream in) throws Exception {
        String osName = System.getProperty("os.name");
        String storedir = "";
        String separator = "";
        if (osName == null)
            osName = "";
        if (osName.toLowerCase().indexOf("win") != -1) {
            separator = "\";
            if (storedir == null || storedir.equals(""))
                storedir = "c:\tmp";
        } else {
            separator = "/";
            storedir = "/tmp";
        }
        File storefile = new File(storedir + separator + fileName);
        System.out.println("storefile's path: " + storefile.toString());
        // for(int i=0;storefile.exists();i++){
        // storefile = new File(storedir+separator+fileName+i);
        // }
        BufferedOutputStream bos = null;
        BufferedInputStream bis = null;
        try {
            bos = new BufferedOutputStream(new FileOutputStream(storefile));
            bis = new BufferedInputStream(in);
            int c;
            while ((c = bis.read()) != -1) {
                bos.write(c);
                bos.flush();
            }
        } catch (Exception exception) {
            throw new Exception("文件保存失败!");
        } finally {
            bos.close();
            bis.close();
        }
    }

}

3、MailAuthenticator

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

public class MailAuthenticator extends Authenticator {
    private String username;
    private String password;

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

    @Override
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

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

4、IReceiveHandle

public interface IReceiveHandle {
    boolean isNeedReceive(String uid);

    void handle(ReceiveEmail receiveEmail);
}

5、EmailAttachment

public class EmailAttachment {
    private String fileName;
    private byte[] attachment;

    public String getFileName() {
        return fileName;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public byte[] getAttachment() {
        return attachment;
    }

    public void setAttachment(byte[] attachment) {
        this.attachment = attachment;
    }
}

6、MyReceiveHandle

public class MyReceiveHandle implements IReceiveHandle {

    public boolean isNeedReceive(String uid) {
        return true;
    }

    public void handle(ReceiveEmail receiveEmail) {

        System.out.println("Start ===================================");
        System.out.println(receiveEmail.getFrom());
        System.out.println(receiveEmail.getSubject());
        System.out.println(receiveEmail.getContent());
        System.out.println("End ===================================");
    }
}

7、ReceiveEmail

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ReceiveEmail {
    private String uid;
    private Date sentDate;
    private String from;
    private String subject;
    private String content;
    private List<byte[]> attachments = new ArrayList<byte[]>();

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public Date getSentDate() {
        return sentDate;
    }

    public void setSentDate(Date sentDate) {
        this.sentDate = sentDate;
    }

    public String getFrom() {
        return from;
    }

    public void setFrom(String from) {
        this.from = from;
    }

    public String getSubject() {
        return subject;
    }

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

    public String getContent() {
        return content;
    }

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

    public List<byte[]> getAttachments() {
        return attachments;
    }

    public void setAttachments(List<byte[]> attachments) {
        this.attachments = attachments;
    }
}