尝试在没有javamail的情况下打开gmail文件夹

所以我创建了一个程序，没有使用javamail连接gmail IMAP。我已成功登录，但我正在努力找到打开文件夹的方法。我已经看过了所有的答案都是javamail，我不想使用它，因为我自己也在学习它，但是我似乎在JavaAPI中找不到任何允许我在不使用javamail的情况下打开此文件的东西

这是我的密码：

public class CRole  {
    private BufferedReader socketSIn = null;
    private PrintWriter socketSOut = null;
    private Socket client;
    public CRole(){
         SSLSocketFactory sslsocketfactory = (SSLSocketFactory)   SSLSocketFactory.getDefault();
         try {
                client = (SSLSocket) sslsocketfactory.createSocket("imap.gmail.com", 993);
        System.out.println("Connect to Host");

         }
         catch(IOException e) {
            System.out.println("Unable to listen on ports");
            System.exit(+1);
         }
     try {
            socketSIn = new BufferedReader(new InputStreamReader(client.getInputStream()));
            socketSOut = new PrintWriter(client.getOutputStream(), true);
         } 
    catch(IOException e) {
            System.out.println("Read failed");
            System.exit(+1);
         }
 }
   public void send_connectStringToS(String payload) {
    this.socketSOut.println(payload);
 }
   public String receive_acceptedStringFromS() {
    String line = "";
    try {
            line = this.socketSIn.readLine();
    }
    catch(IOException e) {
            System.out.println("Input/Outpur error.");
           System.exit(+1);
    }
    return line;
}

有更多的代码，但我不认为这个问题真的需要它。基本上，我必须使用javamail还是有其他选择

还有一种更快的缩进方式，因为当我使用空格键时，它总是避开

 public class Imaps  {
     private static BufferedReader in = null;
     private static PrintWriter out = null;
     private static Socket client;
     public static void main (String []arg){
    SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
    try {
        client = (SSLSocket) sslsocketfactory.createSocket("imap.gmail.com", 993);
        System.out.println("Connect to Host");

    }
    catch(IOException e) {
        System.out.println("Unable to listen on ports");
        System.exit(+1);
    }
    try {
        in = new BufferedReader(new InputStreamReader(client.getInputStream()));
        out = new PrintWriter(client.getOutputStream(), true);
        out.println("abcd CAPABILITY");
        String response =  (String) in.readLine();
        System.out.println("Server: " + response);

        out.println("efgh STARTTLS"); //tls part does not work but will not cause any problems being there.
        response =  (String) in.readLine();
        System.out.println("Server: " + response);

        String payload3 = "a001 login username @gmail.com password";
        out.println(payload3);

        response =  (String) in.readLine();
        System.out.println("Server: " + response);
        response =  (String) in.readLine();
        System.out.println("Server: " + response);
        response =  (String) in.readLine();
        System.out.println("Server: " + response);
        //should say success if you enter correct password.


        String payload5 = "a002 select inbox";
        //String payload5 = "a002 select inbox";
        out.println(payload5);

        response =   (String) in.readLine();
        System.out.println("Server: " + response);
        response =  (String) in.readLine();
        System.out.println("Server: " + response);
        response =  (String) in.readLine();
        System.out.println("Server: " + response);
        response =   (String) in.readLine();
        System.out.println("Server: " + response);


    }
    catch(IOException e) {
        System.out.println("Read failed");
        System.exit(+1);
    }

---

答案是，发送a002 select inbox时，不需要将文件夹存储在打开的任何位置。在此之后，您可以使用a004 fetch 1 body[文本]请求任何您想要的消息。请注意，第一名将获取您帐户中的第一封电子邮件，而不是最近的一封

如果您正在寻找一个API，您已经猜到了，Javamail是一个不错的选择。否则，您可以尝试创建自己的IMAP实现，祝您好运。如果您真的想从头开始，实际的协议记录在RFC3501中。是的，我已经阅读了一段时间，不知道该做什么。然而，这比我想象的要容易得多。