下面包含的代码出现以下异常。 当排除 while() 循环时，这可以正常工作。这是为什么？
Oct 6, 2011 1:19:31 AM com.mytunes.server.ServerHandler run
SEVERE: null
java.io.EOFException
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2552)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1297)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at com.mytunes.server.ServerHandler.run(ServerHandler.java:68)
ServerHandler 类:
public class ServerHandler extends Thread {
.
.
.
public ServerHandler(...){
...
}
public void run(){
try {
os = s.getOutputStream();
oos = new ObjectOutputStream(os);
is = s.getInputStream();
ois = new ObjectInputStream(is);
while(true){
msg = (Messenger) ois.readObject();
String methodType = msg.getKey();
//validating various data passed from the serialized object
if(methodType.equals("validateCard")){
} else if(methodType.equals("validatePIN")){
}
}
} catch (SQLException ex) {
Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
} catch (ClassNotFoundException ex) {
Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
} finally{
try {
ois.close();
is.close();
oos.close();
os.close();
s.close();
} catch (IOException ex) {
Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
类服务器
public class Server{
...
ServerSocket ss;
...
public static void main(String args[]){
Server server = new Server();
server.init();
}
public void init(){
try {
System.out.println("Server started...");
ss = new ServerSocket(port);
System.out.println("Listening on " + ss.getInetAddress() + ":" + ss.getLocalPort());
System.out.println("Waiting for clients...");
while(true){
Socket incoming_socket = ss.accept(); // returns a Socket connection object if received
new ServerHandler(...).start();
}
} catch (IOException ex) {
Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
最佳答案
您永远不断尝试读取对象，永远不会跳出循环。当客户端关闭连接时，流将耗尽数据，并且 ObjectInputStream.readObject 方法将引发您所看到的异常。
您预计流中会有多少个对象，为什么要读到它们的末尾？
关于尝试执行 java 套接字操作时出现 java.io.EOFException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7666997/