如何使用java中的套接字启用防火墙和路由器权限来发送文件?
我一直在开发一个Swing应用程序,当我想添加一个选项,用户可以通过本地网络发送文件时,我遇到了一些严重的问题 为了通过网络发送文件,我使用Sockets库在客户端和服务器之间创建了一个连接,client.java的源代码是:如何使用java中的套接字启用防火墙和路由器权限来发送文件?,java,sockets,exception,firewall,connection-timeout,Java,Sockets,Exception,Firewall,Connection Timeout,我一直在开发一个Swing应用程序,当我想添加一个选项,用户可以通过本地网络发送文件时,我遇到了一些严重的问题 为了通过网络发送文件,我使用Sockets库在客户端和服务器之间创建了一个连接,client.java的源代码是: package Test; import java.io.BufferedOutputStream; import java.io.FileOutputStream; import java.io.IOException; imp
package Test;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
public class Client{
public static void main (String [] args ) throws IOException {
int filesize=6022386; // filesize temporary hardcoded
long start = System.currentTimeMillis();
int bytesRead;
int current = 0;
Socket sock = null;
try{
sock = new Socket("192.168.1.107",1234);
}catch(Exception e){
e.printStackTrace();
e.getCause();
}
System.out.println("Connecting...");
// receive file
byte [] mybytearray = new byte [filesize];
InputStream is = sock.getInputStream();
FileOutputStream fos = new FileOutputStream("C:\\Test\\test-copy.txt");
BufferedOutputStream bos = new BufferedOutputStream(fos);
bytesRead = is.read(mybytearray,0,mybytearray.length);
current = bytesRead;
do {
bytesRead =
is.read(mybytearray, current, (mybytearray.length-current));
if(bytesRead >= 0) current += bytesRead;
} while(bytesRead > -1);
bos.write(mybytearray, 0 , current);
bos.flush();
long end = System.currentTimeMillis();
System.out.println(end-start);
bos.close();
sock.close();
sock.getPort();
}
}
package Test;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server{
public static void main (String [] args ) throws IOException {
// create socket
ServerSocket servsock = new ServerSocket(1234);
while (true) {
System.out.println("Waiting...");
Socket sock = servsock.accept();
//servsock.set
System.out.println("Accepted connection : " + sock);
// sendfile
File myFile = new File ("C:\\testing\\test.txt");
byte [] mybytearray = new byte [(int)myFile.length()];
FileInputStream fis = new FileInputStream(myFile);
BufferedInputStream bis = new BufferedInputStream(fis);
bis.read(mybytearray,0,mybytearray.length);
OutputStream os = sock.getOutputStream();
System.out.println("Sending...");
os.write(mybytearray,0,mybytearray.length);
os.flush();
sock.close();
}
}
}
而Server.java的源代码是:
package Test;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
public class Client{
public static void main (String [] args ) throws IOException {
int filesize=6022386; // filesize temporary hardcoded
long start = System.currentTimeMillis();
int bytesRead;
int current = 0;
Socket sock = null;
try{
sock = new Socket("192.168.1.107",1234);
}catch(Exception e){
e.printStackTrace();
e.getCause();
}
System.out.println("Connecting...");
// receive file
byte [] mybytearray = new byte [filesize];
InputStream is = sock.getInputStream();
FileOutputStream fos = new FileOutputStream("C:\\Test\\test-copy.txt");
BufferedOutputStream bos = new BufferedOutputStream(fos);
bytesRead = is.read(mybytearray,0,mybytearray.length);
current = bytesRead;
do {
bytesRead =
is.read(mybytearray, current, (mybytearray.length-current));
if(bytesRead >= 0) current += bytesRead;
} while(bytesRead > -1);
bos.write(mybytearray, 0 , current);
bos.flush();
long end = System.currentTimeMillis();
System.out.println(end-start);
bos.close();
sock.close();
sock.getPort();
}
}
package Test;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server{
public static void main (String [] args ) throws IOException {
// create socket
ServerSocket servsock = new ServerSocket(1234);
while (true) {
System.out.println("Waiting...");
Socket sock = servsock.accept();
//servsock.set
System.out.println("Accepted connection : " + sock);
// sendfile
File myFile = new File ("C:\\testing\\test.txt");
byte [] mybytearray = new byte [(int)myFile.length()];
FileInputStream fis = new FileInputStream(myFile);
BufferedInputStream bis = new BufferedInputStream(fis);
bis.read(mybytearray,0,mybytearray.length);
OutputStream os = sock.getOutputStream();
System.out.println("Sending...");
os.write(mybytearray,0,mybytearray.length);
os.flush();
sock.close();
}
}
}
如您所见,我想将test.txt文件从我的计算机发送到本地网络中存在的另一台计算机。当我运行Server.Java和Client.Java时,终端中出现异常,提示连接超时:
java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
Connecting...
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:208)
at Test.NewClass1.main(Client.java:27)
Exception in thread "main" java.lang.NullPointerException
at Test.Client.main(Client.java:36)
java.net.ConnectException:连接超时:连接
位于java.net.DualStackPlainSocketImpl.connect0(本机方法)
连接。。。
位于java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
位于java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
位于java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
位于java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
位于java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
位于java.net.socksocketimpl.connect(socksocketimpl.java:391)
位于java.net.Socket.connect(Socket.java:579)
位于java.net.Socket.connect(Socket.java:528)
位于java.net.Socket。(Socket.java:425)
位于java.net.Socket(Socket.java:208)
位于Test.NewClass1.main(Client.java:27)
线程“main”java.lang.NullPointerException中出现异常
位于Test.Client.main(Client.java:36)
更让我困惑的是,当我使用我的本地主机运行应用程序时,文件test copy.txt的副本创建得很好,我已经查找了异常的原因,我发现可能是防火墙权限,我为端口启用了事务:1234,但我仍然得到了相同的错误
我想问的是,这是权限还是特权的问题?如果是,我应该将什么设置为防火墙或路由器的配置以启用事务?
我的计算机被设置为管理员和目标,我正在使用Windows7作为操作系统
我希望我把问题说清楚
谢谢:)。我之所以发布这两个类,是为了让每个人都明白我的问题:)@ZakariaMarrah-代码与你真正的问题无关,而你真正的问题与主题无关。关于如何配置防火墙的问题不是编程问题。(你最好删除所有不相关的内容,因为如果问题确实被迁移,当他们看到Java代码和标记时,他们很可能会将其取消…)如果你看到代码,你会注意到一个称为连接超时的异常,当我搜索原因时,我发现是防火墙或路由器配置,这就是我询问防火墙或路由器配置的原因:)