java - 无法在 java 中使用 ObjectInputStream 和 SealedObject 来使用 readObject()。获取运行时错误

Question

运行时错误如下:

线程“main”java.lang.ClassCastException中出现异常:类消息无法转换为类javax.crypto.SealedObject(消息位于加载程序“app”的未命名模块中；javax.crypto.SealedObject位于模块中加载器“bootstrap”的 java.base)
在 Server.listStoreCheckDelete(Server.java:93)
在 Server.main(Server.java:69)

import java.io.*;
import java.net.*;
import java.util.*;
import java.security.*;
import javax.crypto.*;

class Message implements Serializable {
public String recipientHash; 
        public Date timestamp;       
        public byte[] key;           
        public byte[] iv;            
        public byte[] encryptedMsg;  
        public byte[] signature;     
}

class Server{
    static Map<String, String> map;
    static List<String> list;
    static String currentUserid;

    public static void main(String [] args) throws Exception {
        int port = Integer.parseInt(args[0]);
        ServerSocket ss = new ServerSocket(port);
        map = new HashMap<>();
        list=new ArrayList<String>();  
        while(true)
        {
        int firstexe=1;
        System.out.println("Waiting rebellions connection...");
        Socket s = ss.accept();
        DataInputStream dis = new DataInputStream(s.getInputStream());
        DataOutputStream dos = new DataOutputStream(s.getOutputStream());
        String  rebellionMsg=null;
        Server.currentUserid=null;
        int numberofmsg=0;
        try {
            while ((rebellionMsg = dis.readUTF()) != null) {
                System.out.println(rebellionMsg);
                if (firstexe==1)
                        {
                firstexe=0;
                dos.writeUTF("Hey! You have "+numberofmsg+" for you!");
                dos.flush();
                }
                listStoreCheckDelete(rebellionMsg,s);
            }   
        }
        catch(IOException e) {
            System.err.println("Client closed its connection. -->"+e);
        }
        }
    }

    public static void listStoreCheckDelete(String rebellionMsg,Socket s) throws Exception
    {
            String listAddition=null;
            ObjectInputStream in = new ObjectInputStream(s.getInputStream());
            SealedObject so = (SealedObject)in.readObject();
}}

Answer 1

Exception in thread "main" java.lang.ClassCastException: class Message cannot be cast to class javax.crypto.SealedObject

        SealedObject so = (SealedObject)in.readObject();

您已收到一个 Message 类型的序列化对象，而不是 SealedObject。该行应为:

        Message message = (Message)in.readObject();