java网络编程传送对象问题

[waterlamp]

、对象

package cfsServer;

public class SearchModel implements java.io.Serializable{
    private static final long serialVersionUID = 1L;
    private String sql;
    private String[] paras;

    public SearchModel(String sql, String[] paras) {
        this.sql = sql;
        this.paras = paras;
    }

    public String getSql() {
        return sql;
    }

    public void setSql(String sql) {
        this.sql = sql;
    }

    public String[] getParas() {
        return paras;
    }

    public void setParas(String[] paras) {
        this.paras = paras;
    }
}

2、服务端

package cfsServer;

import java.net.*;
import java.util.logging.Logger;

public class CfsServer {

    private final static Logger logger = Logger.getLogger(CfsServer.class.getName());
    public CfsServer(){
        ServerSocket ss=null;
        try {
            System.out.println("服务器启动。。");
            int count=0;//记录连接的客户端数量
            ss=new ServerSocket(9999);
            Socket socket=null;
            while (true){
                socket=ss.accept();
                ++count;

                Thread serverHandleThread=new Thread(new ServerHandleThread(socket));
                serverHandleThread.setPriority(4);
                serverHandleThread.start();
                System.out.println("上线的客户端有" + count + "个！");
                InetAddress inetAddress = socket.getInetAddress();
                System.out.println("当前客户端的IP地址是："+inetAddress.getHostAddress());

            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        new CfsServer();
    }
}

3、serverHandleThread

package cfsServer;

import java.net.*;
import java.io.*;

public class ServerHandleThread implements Runnable {
    Socket socket=null;
    public ServerHandleThread(Socket socket) {
        super();
        this.socket = socket;
    }
    @Override
    public void run() {
        OutputStream os = null;
        PrintWriter pw = null;
        try {
            //先接收客户端的信息
            BufferedReader br=new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String type=br.readLine();
            System.out.println("客户端发送了"+type);
            switch (type){
                case  "table":
                    this.inTable(socket);
                    break;
                case "count":
                    this.inCount(socket);
                    break;
                case "execute":
                    this.updExecute(socket);
                    break;
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try{
                if(pw!=null){
                    pw.close();
                }
                if(os!=null){
                    os.close();
                }
                if(socket!=null){
                    socket.close();
                }
            }catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
    public static void inTable(Socket socket) throws Exception{
        ObjectInputStream ois=null;
        ObjectOutputStream oos=null;
        try {
            InputStream is = socket.getInputStream();
            ois=new ObjectInputStream(is);
            oos=new ObjectOutputStream(socket.getOutputStream());

            Object obj=ois.readObject();
            System.out.println("接收到客户端发的search对象");
            SearchModel sm=(SearchModel)obj;
            System.out.println("转换完成");
            TableModel tm=new TableModel();
            oos.writeObject(tm.addData(sm));
            oos.flush();

        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try{
                if(oos!=null){
                    oos.close();
                }
                if(ois!=null){
                    ois.close();
                }
            }catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}

4、客户端

package com.cfs.model;

import cfsServer.DataModel;
import cfsServer.SearchModel;
import java.io.*;
import java.net.*;
import java.util.logging.Level;
import java.util.logging.Logger;

public class QueryModel {
    Socket socket=null;
    OutputStream os=null;
    ObjectOutputStream oos=null;
    ObjectInputStream is=null;
    PrintWriter pw=null;
    BufferedReader br=null;
    private final static Logger logger = Logger.getLogger(QueryModel.class.getName());
    //向服务器发送sql并要求返回表格模型
    public DataModel addData(String sql,String[] paras){
        SearchModel sm=new SearchModel(sql,paras);
        DataModel dm=null;
        try {
            connect();
            pw.println("table");

            sendObject(sm);

            is=new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));
            dm=(DataModel)is.readObject();
            System.out.println("接收到数据模型");
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            closeConnect();
        }
        return dm;
    }
    //连接服务器，并获得socket
    public void connect(){
        try {
            socket=new Socket("127.0.0.1",9999);
            pw=new PrintWriter(socket.getOutputStream(),true);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    //关闭连接
    public void closeConnect(){
        try {
            if (oos!=null){
                oos.close();
            }
            if (os!=null){
                os.close();
            }
            if (is!=null){
                is.close();
            }
            if (br!=null){
                br.close();
            }
            if (pw!=null){
                pw.close();
            }
            if (socket!=null){
                socket.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    //发送sql模型
    public void sendObject(SearchModel sm){
        try {
            os=socket.getOutputStream();
            oos=new ObjectOutputStream(os);
            oos.writeObject(sm);
            System.out.println("发送search对象");
            socket.shutdownOutput();
        } catch (IOException e) {
            logger.log(Level.SEVERE, null, e);
        }
    }
}

报了如下问题，要怎么处理：
java.io.StreamCorruptedException: invalid stream header: 73720015
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:857)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
at cfsServer.ServerHandleThread.inTable(ServerHandleThread.java:56)
at cfsServer.ServerHandleThread.run(ServerHandleThread.java:22)
at java.lang.Thread.run(Thread.java:748)