[英]Send object over socket
我正在尝试通过java中的套接字发送一个custome对象。 我知道我需要把具有对象的类放在同一个包中,具有相同的serialVersionUID并实现Serializable。 我已经做到了,但我仍然无法通过套接字发送对象。 我哪里错了?
这是客户端代码:
客户端的类用户
package data;
import java.io.Serializable;
public class User implements Serializable {
/**
*
*/
public static final long serialVersionUID = 1L;
private String username = null;
private String hashedPassword = null;
private Integer code = null;
private String from = null;
private String to = null;
private Object data = null;
public User() {
}
public User(Integer code) {
this.code = code;
}
public User(Integer code, Object data) {
this.code = code;
this.data = data;
}
public User(String username, String hashedPassword, Integer code, String from, String to, Object data) {
this.username = username;
this.hashedPassword = hashedPassword;
this.code = code;
this.from = from;
this.to = to;
this.data = data;
}
public Integer getCode() {
return code;
}
// other getters and setters
}
用于发送用户类对象的代码:
package tankclient;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import data.*;
public class Main {
public static void main(String args[]) {
Socket socket = null;
ObjectOutputStream oos = null;
ObjectInputStream ois = null;
boolean isConnected = false;
String ipServer = "localhost";
int portServer = 4444;
try {
// Print("connecting to server...");
socket = new Socket(ipServer, portServer);
isConnected = true;
oos = new ObjectOutputStream(socket.getOutputStream());
ois = new ObjectInputStream(socket.getInputStream());
oos.writeObject(new User());
// Print("connect server success");
} catch (Exception ex) {
isConnected = false;
ex.printStackTrace();
}
// DataTransfer transfer = new DataTransfer();
// //transfer.SendDataRequest(new DataRequest(3));
// transfer.TestSend();
}
}
这是服务器的代码:
用户类代码:与客户端用户完全相同(我从客户端复制并粘贴到服务器中)
接收用户对象的服务器代码:
package tankserver;
import data.*;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Main {
public static void main(String args[]) {
ServerSocket serverSocket = null;
Socket socket = null;
ObjectOutputStream oos = null;
ObjectInputStream ois = null;
boolean isConnected = false;
int portServer = 4444;
try {
System.out.println("waiting for client to connect ...");
serverSocket = new ServerSocket(portServer);
socket = serverSocket.accept();
oos = new ObjectOutputStream(socket.getOutputStream());
ois = new ObjectInputStream(socket.getInputStream());
isConnected = true;
System.out.println("connected");
User obj = (User) ois.readObject();
System.out.println(obj.toString());
} catch (Exception ex) {
isConnected = false;
ex.printStackTrace();
}
//DataTransfer transfer = new DataTransfer();
//transfer.GetDataRequest();
//transfer.TestRecieve();
}
}
这是我收到的stacktrace(在服务器端):
java.net.SocketException:java.net.SocketInputStream.read(SocketInputStream.java:2014)java.net.SocketInputStream.read(SocketInputStream.java:2014)中的连接重置java.net.SocketInputStream.read(SocketInputStream.java) :223)at java.io.ObjectInputStream $ PeekInputStream.peek(ObjectInputStream.java:2296)at java.io.ObjectInputStream $ BlockDataInputStream.readBlockHeader(ObjectInputStream.java:2476)at java.io.ObjectInputStream $ BlockDataInputStream.refill(ObjectInputStream。 java:2546)at java.io.ObjectInputStream $ BlockDataInputStream.skipBlockData(ObjectInputStream.java:2448)at java.io.ObjectInputStream.skipCustomData(ObjectInputStream.java:1944)at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1621) )java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)at java.io .ObjectInputStream.readObject(ObjectIn putStream.java:371)at tankserver.Main.main(Main.java:31)BUILD SUCCESSFUL(总时间:8秒)
当我尝试调试然后跟随情况发生:当我把断点放在客户端(服务器运行normaly)并一步一步运行然后它工作,但当我把断点在服务器(客户端运行normaly)并一步一步运行然后它在第28行抛出异常ois = new ObjectInputStream(socket.getInputStream());
我知道我需要把具有对象的类放在同一个包中
不,除非你的意思是“与自己相同的包装”,这是微不足道的。
具有相同的serialVersionUID
是。
并实现Serializable。
是。
我已经做到了,但我仍然无法通过套接字发送对象。 我哪里做错了?
您没有在客户端类中正确关闭套接字,因此连接已重置。 关闭输出流而不是仅刷新它。
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