在这段代码中，我多次使用两个节点检索输入输出数据。 ...当我使用两次以上的输入输出流时，它会在运行此代码时产生这种类型的错误我需要不同的输入和输出，我想存储但不幸的是，如果我使用三次以上的输入/输出流它显示错误
public class Server {
private static Socket socket;
public void connect() throws IOException{
int port = 25000;
ServerSocket serverSocket = new ServerSocket(port);
System.out.println("Server Started and listening to the port 25000");
socket = serverSocket.accept();
}
//Server is running always. This is done using this while(true) loop
//Reading the message from the client
public void first() throws IOException{
connect();
InputStream is = socket.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String number = br.readLine();
System.out.println("Message received from client is "+number);
//Multiplying the number by 2 and forming the return message
String returnMessage;
try
{
int numberInIntFormat = Integer.parseInt(number);
int returnValue = numberInIntFormat*2;
returnMessage = String.valueOf(returnValue) + "\n";
}
catch(NumberFormatException e)
{
//Input was not a number. Sending proper message back to
client.
returnMessage = "Please send a proper number\n";
}
second();
String e=br.readLine();System.out.println(e);
}
public void second() throws IOException{
//Sending the response back to the client.
String returnMessage="Second";
OutputStream os = socket.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
bw.write(returnMessage);
System.out.println("Message sent to the client is "+returnMessage);
bw.flush();
}
public static void main(String args[]) throws IOException{
Server obj = new Server();
obj.first();
// obj.second();
}public class Server {
private static Socket socket;
public void connect() throws IOException{
int port = 25000;
ServerSocket serverSocket = new ServerSocket(port);
System.out.println("Server Started and listening to the port 25000");
socket = serverSocket.accept();
}
//Server is running always. This is done using this while(true) loop
//Reading the message from the client
public void first() throws IOException{
connect();
InputStream is = socket.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String number = br.readLine();
System.out.println("Message received from client is "+number);
//Multiplying the number by 2 and forming the return message
String returnMessage;
try
{
int numberInIntFormat = Integer.parseInt(number);
int returnValue = numberInIntFormat*2;
returnMessage = String.valueOf(returnValue) + "\n";
}
catch(NumberFormatException e)
{
//Input was not a number. Sending proper message back to client.
returnMessage = "Please send a proper number\n";
}
second();
String e=br.readLine();System.out.println(e);
}
public void second() throws IOException{
//Sending the response back to the client.
String returnMessage="Second";
OutputStream os = socket.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
bw.write(returnMessage);
System.out.println("Message sent to the client is "+returnMessage);
bw.flush();
}
public static void main(String args[]) throws IOException{
Server obj = new Server();
obj.first();
// obj.second();
}
public class client {
private static Socket socket;
//public void connect() throws UnknownHostException, IOException{
//}
public void first() throws IOException{
String host = "localhost";
int port = 25000;
InetAddress address = InetAddress.getByName(host);
socket = new Socket(address, port);
OutputStream os = socket.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
String number = "2";
String sendMessage = number + "\n";
bw.write(sendMessage);
bw.flush();
System.out.println("Message sent to the server : "+sendMessage);
String sendMessage1="3333";
bw.write(sendMessage1);
bw.flush();
//second();
}
public void second1() throws IOException{
//Get the return message from the server
InputStream is = socket.getInputStream();
InputStreamReader isr;
isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String message = br.readLine();
System.out.println("Message received from the server : " +message);
socket.close();
}
public static void main (String argd[]) throws IOException{
client obj1 = new client();
obj1.first();
}
-----------------------------------------
error
Message received from client is 2
Message sent to the client is Second
Exception in thread "main" java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:209)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
答案 0 :(得分：0)
InputStream和OutputStream旨在使用单一来源和目的地。一旦获得从文件/套接字/任何源读取的InputStream，您就可以将其用于多个连续读取。但是，一旦完成从该源读取，您需要在流上调用close()方法。
不关闭流是Java中内存泄漏的经典原因。事实上，由于这个原因，你总是期望用try catch包围你的源代码，并且总是在finally语句中调用close()方法。所以要确保它总是被调用。此外，由于close()方法本身可能会导致Exception，因此在最终语句中您需要使用自己的try-catch包围它。从java 7开始，有一个名为＆＃34的新功能;尝试使用资源＆＃34;处理这个特殊问题。
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