spring boot調用Exchange郵件服務器發送電子郵件

         網上介紹利用spring boot通過POP3、IMAP、SMTP等協議來發送電子郵件的資料非常多，然而介紹利用Exchange郵件服務器來發郵件的資料卻極少。下面來看看，如何在spring boot中用Exchange服務器來發郵件，以及需要注意的問題。

　　首先，你需要知道郵件服務器的地址，例如我下面的例子中服務器地址是https://webmail.XXXXX.com/EWS/Exchange.asmx（XXXX是公司域名，不便公開）。其次，要保證你能正確連接上這個郵件服務器，檢驗的方法是在瀏覽器中輸入這個服務器地址，會返回一個xml文件。某些公司有安全設置，只能在內部網絡中登錄這個服務器，或者需要通過VPN才可以登錄這個服務器。

　　如果上述的條件都滿足了，那么就可以開始編寫spring boot的代碼了。

　　一、引入依賴ews-java-api

<dependency>
       <groupId>com.microsoft.ews-java-api</groupId>
       <artifactId>ews-java-api</artifactId>
       <version>2.0</version>
</dependency>

　　二、新建一個郵件配置類：ExchangeMailUtils

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.service.item.EmailMessage;
import microsoft.exchange.webservices.data.credential.ExchangeCredentials;
import microsoft.exchange.webservices.data.credential.WebCredentials;
import microsoft.exchange.webservices.data.property.complex.MessageBody;

import java.net.URI;
import java.net.URISyntaxException;

public class ExchangeMailUtils {
    private String mailServer;  //郵件服務器地址
    private String user;　　　　//登錄用戶名
    private String password;　　//登錄密碼
    private String domain;　　　　//域

public ExchangeMailUtils(String mailServer, String user, String password, String domain) {
        this.mailServer = mailServer;
        this.user = user;
        this.password = password;
        this.domain = domain;
    }
    /**
     * 創建郵件服務
     * @return 郵件服務
     */
    private ExchangeService getExchangeService() {
        ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
        //用戶認證信息
        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;
    }
    /**
     * 發送帶附件的mail
     * @param subject         郵件標題
     * @param to              收件人列表
     * @param cc              抄送人列表
     * @param bodyText        郵件內容
     * @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();
    }

    /**
     * 發送不帶附件的mail
     * @param subject  郵件標題
     * @param to       收件人列表
     * @param cc       抄送人列表
     * @param bodyText 郵件內容
     * @throws Exception
     */
    public void send(String subject, String[] to, String[] cc, String bodyText) throws Exception {
        send(subject, to, cc, bodyText, null);
    }
}

三、控制類

@RestController
public class SendEmail {
    @RequestMapping(value = {"/email"}, method = RequestMethod.GET, produces = "application/json;charset=UTF-8")
    public void sendemail( ) throws Exception {
        ExchangeMailUtils exchangeMailUtils=new ExchangeMailUtils("https://webmail.XXXXX.com/EWS/Exchange.asmx",
                "用戶名", "密碼","域");
        String [] a={"收件人郵箱"};
        String [] cc={};
        exchangeMailUtils.send("主題",a,null,"本體");
    }
}

 四、可能出現的錯誤：

1、The remote server returned an error: (403)Forbidden：出現這個錯誤可能是因為你不在內部網或者沒有通過VPN連接服務器。

2、Cannot invoke "String.equalsIgnoreCase(String)" because "scheme" is null：出現這個錯誤是因為郵件服務器地址漏寫了https: