尝试编写对象时获取NotSerializableException [英] Getting NotSerializableException when trying to write object

问题描述

尝试序列化并将 Lot 对象发送到套接字。获取错误：

Trying to serialize and send Lot object to socket. Getting error:

java.io.NotSerializableException: com.server.ClientServiceThread

为什么？

public class ClientServiceThread extends Thread  {... // form here called sendObj ...}

public class FlattenLot {
public void sendObj(){
        try {
            out = new ObjectOutputStream(oStream);
            out.writeObject(lot); // error
            out.flush();
            out.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

批次类：

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import java.util.Date;
import java.util.Calendar;

public class Lot implements Serializable{
private static final long serialVersionUID = 1L;
    public ArrayList<ClientServiceThread> clientBidsLog = new ArrayList<ClientServiceThread>();
    public ArrayList<Integer> bidLog = new ArrayList<Integer>();

    private List<Integer> bids = new ArrayList<Integer>();
    private List<ClientServiceThread> clients = new ArrayList<ClientServiceThread>();

    private  String NAME;
    private  int INITIAL_PRICE;

    private int MAX_BID = 0;
    public volatile boolean notAvailable = false;
Lot(String name, int initPrice){
        NAME = name;
        INITIAL_PRICE = initPrice;
    }
public synchronized String getName(){return NAME;}
public synchronized int getInitPrice(){return INITIAL_PRICE;}
public synchronized void subscribe(ClientServiceThread t){
        clients.add(t);
      }
public synchronized void unsubscribe(ClientServiceThread t){
        clients.remove(t);
      }
public  synchronized boolean makeBid(ClientServiceThread t,int i){
          if(i > INITIAL_PRICE && i > MAX_BID){
                clientBidsLog.add(t);
                bidLog.add(i);
                bids.add(i);
                MAX_BID = i;
                t.LAST_BID = i;
                notifyAllSubscribers("New bid: "+this.getMaxBid()+" made by "+this.clientBidsLog.get(this.clientBidsLog.size()-1).CLIENT_NAME);
                return true;
          }else{
                return false;
          }


          }
public synchronized void notifyAllSubscribers(String msg){
        for (ClientServiceThread client : clients){
              client.lotUpdated(this, msg);
            }
    }
public synchronized int getMaxBid(){return MAX_BID;}

    private Date time;

    public Lot() {
        time = Calendar.getInstance().getTime();
    }

    public Date getTime() {
        return time;
    }
    }

推荐答案

批次包含

public ArrayList<ClientServiceThread> clientBidsLog 
private List<ClientServiceThread> clients

如果您希望序列化此字段，请标记 ClientServiceThread 可序列化

If you wish this field to be serialized mark the ClientServiceThread serializable too

如果您不希望序列化，只需标记 transient like

if you don't want it to be serialized just mark it transient like

public transient ArrayList<ClientServiceThread> clientBidsLog 
private transient List<ClientServiceThread> clients

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