http Java Web客户端远程连接
我正在编写一个web服务器/客户端。通过本地主机进行通信时,一切正常。但是当使用我的公共IP地址进行通信时,会引发异常。下面是一个简单的工作示例:
import java.io.*;
import java.text.*;
import java.util.*;
import java.net.*;
public class Server
{
public static void main(String[] args) throws IOException
{
int port = 80;
// server is listening on port
ServerSocket ss = new ServerSocket(port);
// running infinite loop for getting
// client request
while (true)
{
Socket s = null;
try
{
// socket object to receive incoming client requests
s = ss.accept();
System.out.println("A new client is connected : " + s);
// obtaining input and out streams
ObjectOutputStream odos = new ObjectOutputStream(s.getOutputStream());
ObjectInputStream odis = new ObjectInputStream(s.getInputStream());
Info info = new Info();
info.color = 1;
odos.writeObject(info);
while(true){
info = (Info)odis.readObject();
if(info.exit){
break;
}
}
// closing resources
odis.close();
odos.close();
}
catch (Exception e){
s.close();
e.printStackTrace();
}
}
}
}
客户:
import java.util.*;
import java.net.*;
import java.io.*;
import java.net.InetAddress;
public class Client
{
public static void main(String[] args) {
if(args.length>0){
ip_name = args[0];
}
if(args.length>1){
port = Integer.parseInt(args[1]);
}
network();
}
private static String ip_name = "localhost";
private static int port = 80;
private static void network(){
try
{
System.out.println("Connecting to network");
InetAddress ip = InetAddress.getByName(ip_name);
// establish the connection with server port
Socket s = new Socket(ip, port);
System.out.println("Connected");
// obtaining input and out streams
ObjectOutputStream odos = new ObjectOutputStream(s.getOutputStream());
InputStream i = s.getInputStream();
ObjectInputStream odis = new ObjectInputStream(i);
// get what color we are
int color = ((Info)odis.readObject()).color;
System.out.println(color);
//say we are done
Info info = new Info();
info.exit = true;
odos.writeObject(info);
System.out.println("Shutting down");
}catch(Exception e){
e.printStackTrace();
}
}
}
使用localhost时,客户端会按预期打印出:
Connecting to network
Connected
1
Shutting down
但当我用我的公共IP替换localhost时:
Connecting to network
Connected
java.io.StreamCorruptedException: invalid stream header: 48545450
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at Client.network(Client.java:36)
at Client.main(Client.java:14)
485450是“HTTP”的十六进制,但除此之外,我不知道问题出在哪里。有什么想法吗
# 1 楼答案
当我试着运行你的代码时,我得到了错误“信息是不可序列化的”。我修改了你的信息类如下
如果要发送类数据,则需要实现
Serializable
。使用它,您可以通过网络保存对象信息