javamail微软邮箱imap协议使用oauth2.0认证--微软邮箱国际版

使用微软邮箱中国版的看javamail微软邮箱imap协议使用oauth2.0认证–微软邮箱中国版（21v世纪互联运营的微软邮箱）

一、账号授权

imap协议使用oauth2.0身份认证，必须先对帐号进行授权，授权方式可以看我之前的文章：微软邮箱oath2协议下，使用imap协议时对账号授权，如果不进行授权，即使认证通过了，但是获取邮件相关文件夹时，会报错：A3 BAD User is authenticated but not connected.;
具体报错如下：

二、直接上代码

package test;import com.alibaba.fastjson.JSON;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.PostMethod;import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
import java.io.IOException;
import java.util.Map;
import java.util.Properties;public class TestImapAndOauth2 {public static void main(String[] args) {String userEmail = "邮箱账号";String tenant_id = "租户id";String client_id = "应用id";String client_secret = "密钥的值";//注意不是密钥的idString scope = "https://outlook.office365.com/.default";//固定参数，不是https://graph.microsoft.com/.defaultString url = "https://login.microsoftonline.com/" + tenant_id + "/oauth2/v2.0/token";org.apache.commons.httpclient.HttpClient httpClient = new HttpClient();PostMethod postMethod = new PostMethod(url);postMethod.addRequestHeader("accept", "*/*");//固定参数postMethod.addRequestHeader("connection", "Keep-Alive");//固定参数postMethod.addRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=GBK");//固定参数//必须设置下面这个HeaderpostMethod.addRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");//固定参数//添加请求参数postMethod.addParameter("grant_type", "client_credentials");//固定参数postMethod.addParameter("client_id", client_id);postMethod.addParameter("client_secret", client_secret);postMethod.addParameter("scope", scope);String token = "";try {int code = httpClient.executeMethod(postMethod);String resBody = postMethod.getResponseBodyAsString();if (code == 200) {Map<String, String> map = JSON.parseObject(resBody, Map.class);token = map.get("access_token");}} catch (IOException e) {e.printStackTrace();} finally {postMethod.releaseConnection();}try {String protocol = "imap";int port = 993;String host = "outlook.office365.com";Properties properties = new Properties();properties.setProperty("mail." + protocol + ".ssl.enable", "true");properties.setProperty("mail." + protocol + ".auth.mechanisms", "XOAUTH2");Session session = Session.getInstance(properties);//session.setDebug(true);//这个是开启debug日志的Store store = session.getStore(protocol);store.connect(host, port, userEmail, token);System.out.println("测试通过");Folder inboxFolder = getInboxFolder(store);Message[] messages = inboxFolder.getMessages();for (Message message : messages) {String subject = message.getSubject();System.out.println("邮件主题：" + subject);}} catch (Exception ex) {ex.printStackTrace();System.out.println("不通过");}}public static Folder getInboxFolder(Store store) throws Exception {Folder folder = null;if(store != null) {folder = store.getDefaultFolder();folder = folder.getFolder("INBOX");//获取收件箱文件夹if(!folder.isOpen()) {folder.open(Folder.READ_ONLY);}}return folder;}}