Java实现调用公司Exchange发送邮件（Outlook）

什么是Exchange

    Exchange Server是微软公司的一套电子邮件服务组件。它支持多种电子邮件网络协议，如：SMTP、POP3、IMAP4。Exchange Server是个消息与协作系统，可以被用来架构应用于企业、学校的邮件系统甚至于免费邮件系统，也可以用于开发工作流。

Exchange特别之处

    传统的电子邮箱，像QQ邮箱、163邮箱，用的都是SMTP协议来发送邮件，POP3/IMAP来收取邮件，这些协议都是早期公开的邮件通信协议，至今都被广泛地使用，网上有很多方案和技术文档。
    而Exchange邮箱使用的是微软自己定制的Exchange ActiveSync协议，这套协议兼容SMTP、POP3、IMAP4等多种电子邮件协议，因此能够与其他邮箱进行邮件通信，但这套协议是微软所定制的，所以不能像其他邮箱那样调用SMTP来直接发送邮件，必须调用微软所给出的接口，微软基于Java给出了一套单独的接口。

添加jar包

    com.microsoft.ews-java-api
    ews-java-api
    2.0

代码实现

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import microsoft.exchange.webservices.data.core.ExchangeService;
import microsoft.exchange.webservices.data.core.enumeration.misc.ExchangeVersion;
import microsoft.exchange.webservices.data.core.enumeration.property.BodyType;
import microsoft.exchange.webservices.data.core.enumeration.property.WellKnownFolderName;
import microsoft.exchange.webservices.data.core.service.folder.Folder;
import microsoft.exchange.webservices.data.core.service.item.EmailMessage;
import microsoft.exchange.webservices.data.core.service.item.Item;
import microsoft.exchange.webservices.data.credential.ExchangeCredentials;
import microsoft.exchange.webservices.data.credential.WebCredentials;
import microsoft.exchange.webservices.data.property.complex.MessageBody;
import microsoft.exchange.webservices.data.search.FindItemsResults;
import microsoft.exchange.webservices.data.search.ItemView;

/**
 * 
 * microsoft发送邮件工具类
 * @author shi
 * @date 2019/10/30
 * 
 **/
public class ExchangeMailUtil {
    
    //邮件服务器地址
    private String mailServer;
    //用户名
    private String user;
    //密码
    private String password;
    //使用的方式，默认可用不填
    private String domain;

    /**
     * 构造方法
     */
    public ExchangeMailUtil(String mailServer, String user, String password) {
        this.mailServer = mailServer;
        this.user = user;
        this.password = password;
    }
    
    /**
     * 构造方法
     */
    public ExchangeMailUtil(String mailServer, String user, String password, String domain) {
        this.mailServer = mailServer;
        this.user = user;
        this.password = password;
        this.domain = domain;
    }
    
    /**
     * 创建邮件服务 
     * 
     * @return 邮件服务
     */
    private ExchangeService getExchangeService() {
        ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
        //用户认证信息
        ExchangeCredentials credentials;
        if (domain == null) {
            credentials = new WebCredentials(user, password);
        } else {
            credentials = new WebCredentials(user, password, domain);
        }
        service.setCredentials(credentials);
        try {
            service.setUrl(new URI(mailServer));
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }
        return service;
    }

    /**
     * 收取邮件 
     * 
     * @param max 最大收取邮件数
     * @throws Exception
     */
    public ArrayList receive(int max) throws Exception {
        ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
        ExchangeCredentials credentials = new WebCredentials(user, password);
        service.setCredentials(credentials);
        service.setUrl(new URI(mailServer));
        //绑定收件箱,同样可以绑定发件箱
        Folder inbox = Folder.bind(service, WellKnownFolderName.Inbox);
        //获取文件总数量
        int count = inbox.getTotalCount();
        if (max > 0) {
            count = count > max ? max : count;
        }
        //循环获取邮箱邮件
        ItemView view = new ItemView(count);
        FindItemsResults findResults = service.findItems(inbox.getId(), view);
        ArrayList result = new ArrayList<>();
        for (Item item : findResults.getItems()) {
            EmailMessage message = EmailMessage.bind(service, item.getId());
            result.add(message);
        }
        return result;
    }

    /**
     * 收取所有邮件 
     * @throws Exception
     */
    public ArrayList receive() throws Exception {
        return receive(0);
    }

    /**
     * 发送带附件的mail 
     * @param subject 邮件标题 
     * @param to 收件人列表 
     * @param cc 抄送人列表 
     * @param bodyText 邮件内容 
     * @param attachmentPaths 附件地址列表 
     * @throws Exception
     */
    public void send(String subject, String[] to, String[] cc, String bodyText, String[] attachmentPaths)throws Exception {
        ExchangeService service = getExchangeService();
        EmailMessage msg = new EmailMessage(service);
        msg.setSubject(subject);
        MessageBody body = MessageBody.getMessageBodyFromText(bodyText);
        body.setBodyType(BodyType.HTML);
        msg.setBody(body);
        for (String toPerson : to) {
            msg.getToRecipients().add(toPerson);
        }
        if (cc != null) {
            for (String ccPerson : cc) {
                msg.getCcRecipients().add(ccPerson);
            }
        }
        if (attachmentPaths != null) {
            for (String attachmentPath : attachmentPaths) {
                msg.getAttachments().addFileAttachment(attachmentPath);
            }
        }
        msg.send();
    }
    
    /**
     * 发送不带抄送人的邮件
     * @param subject 标题
     * @param to 收件人列表
     * @param bodyText 邮件内容
     * @throws Exception
     */
    public void send(String subject,String[] to,String bodyText) throws Exception {
        send(subject, to, null, bodyText);
    }
    
    /**
     * 发送不带附件的mail 
     * @param subject 邮件标题 
     * @param to 收件人列表 
     * @param cc 抄送人列表 
     * @param bodyText 邮件内容 
     * @throws Exception
     */
    public void send(String subject, String[] to, String[] cc, String bodyText) throws Exception {
        send(subject, to, cc, bodyText, null);
    }
}

测试方法

/**
     * 发送邮件主方法
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        // Outlook Web Access路径通常为/EWS/exchange.asmx
        ExchangeMailUtil mailUtil = new ExchangeMailUtil("https://mail.xxxxxxxx.com/ews/exchange.asmx", "username",
                "123456");
        //接收人
        String[] to = mailUtil.removeArrayEmpty(new String[]{"[email protected]"});
        //抄送人
        String[] cc = mailUtil.removeArrayEmpty(new String[]{"[email protected]"});
        // 发送邮件
        mailUtil.send("Subject", to, cc, "content");
    }

附：官方文档地址

https://github.com/OfficeDev/ews-java-api/wiki/Getting-Started-Guide