我有一个客户端和服务器,它们之间交换消息和对象。
我的问题是当我在toString
和字符串的帮助下发送对象时。如何从字符串中挑选出对象并将该对象添加到列表中; 我写了代码。在java中写入对象和字符串的错误
Server代码:
import java.net.*;
import java.util.ArrayList;
import java.io.*;
public class Server {
public static void main(String[] args) {
ArrayList <PhoneBook> listPhone=new ArrayList<PhoneBook>();
PhoneBook a = new PhoneBook("a","a","","",1);
listPhone.add(a);
PhoneBook pB = new PhoneBook();
String ob;
try{
ServerSocket server = new ServerSocket(5555,50);
System.out.println("Waiting Incoming Connection...");
System.out.println("Local Address :"+server.getInetAddress()+" Port :"+server.getLocalPort());
Socket sock = server.accept();
ObjectOutputStream out =new ObjectOutputStream(sock.getOutputStream());
ObjectInputStream in =new ObjectInputStream(sock.getInputStream());
String strin =(String) in.readObject();
if (strin.equals("START")){
out.writeObject("WAITING");
out.flush();}
strin =(String) in.readObject();
String[] str=strin.split("\n");
if(str[0].equals("REQUEST_SEARCH")){
try{
// in this line is error
pB = (PhoneBook)in.readObject(); //String cannot be cast to PhoneBook
out.flush();
}catch(ClassNotFoundException classnot){
System.err.println("Data received in unknown format");}
out.writeObject("RECORSDS");
out.flush();
String sName = pB.getsurName();
for(int i=0;i<listPhone.size();i++)
if(listPhone.get(i).getsurName().equals(sName)){
out.writeObject(pB.toString());
out.flush();
}else{
out.writeObject("NXRECORD");
out.flush();
}}
strin =(String) in.readObject();
String[] st=strin.split("\n");
if(st[0].equals("REQUEST_INSERT")){
listPhone.add(pB);
System.out.println("The contact is add");
out.writeObject("OK");
out.flush();
}
out.flush();
if(strin.equals("END")){ //bye = terminate the conversation
in.close();
out.close();
sock.close();
System.out.println("Connection Closing...");}
}
catch (Exception ex){
System.out.println("Error during I/O");
ex.getMessage();
ex.printStackTrace();
} } }
客户端代码:
if (strin.equals("WAITING")) {
System.out.println("The server says: " + strin);
// out.writeObject("REQUEST_SEARCH\n");
// out.flush();
System.out.println("The server says: " + strin);
System.out.print("Write the contact elements ");
System.out.print("Write the name: ");
String name = input.nextLine();
System.out.print("Write the surname: ");
String surName = input.nextLine();
System.out.print("Write the job: ");
String job = input.nextLine();
System.out.print("Write the street: ");
String street = input.nextLine();
System.out.print("Write the phone number: ");
int number = input.nextInt();
PhoneBook p = new PhoneBook(name, surName, job, street, number);
out.writeObject("REQUEST_SEARCH\n" + p.toString());
out.flush();
}
错误:
Connection reset
at java.net.SocketInputStream.read(Unknown Source) at
java.net.SocketInputStream.read(Unknown Source) at
java.net.SocketInputStream.read(Unknown Source) at
java.io.ObjectInputStream$PeekInputStream.peek(Unknown Source) at
java.io.ObjectInputStream$BlockDataInputStream.peek(Unknown Source)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(Unknown Source) at
java.io.ObjectInputStream.readObject0(Unknown Source) at
java.io.ObjectInputStream.readObject(Unknown Source) at Server.main
应用背景:
该程序与接触PhooneBook(服务器)和客户端首先发送一个开始,服务器把它和客户端后,发信等待做一个对象电话簿,包括姓名,工作,街道和电话并发送它与消息REQUEST_SEARCH服务器拿消息和对象(联系人)和搜索数组列表姓氏如果存在联系人,如果存在回发对象并显示姓名,姓氏,工作和其他与toString()
和消息RECORDS然后客户端发送确定和服务器发回END和连接正在关闭如果联系人不存在服务器发送混乱年龄NXRECORD客户端发回一条消息REQUEST_INSERT服务器拿它并在arraylist中添加对象并发送OK并且客户端发回END并关闭连接。
如果您使用的是Eclipse,请用'CTRL + SHIFT + F'你的代码.. – 2013-03-16 20:21:43
这个例外是在正在添加客户端? – 2013-03-16 20:25:02
从服务器来的 – 2013-03-16 20:28:17