我开发了一个独立的应用程序(.jar),它正在Linux环境中运行,我希望将此应用程序保存在服务器(Linux)上,并希望通过其他系统进行访问。
请建议这是否可能。
答案 0 :(得分:6)
您考虑过Java Webstart了吗?它允许客户从Web服务器下载您的应用程序并在本地运行它。
它传统上与GUI(Swing等)应用程序一起使用,但我已经用它来在本地运行守护进程和服务器进程。
它会自动处理应用程序更新,因此您的客户只会在需要时下载该版本。否则,他们将访问他们的本地缓存版本。
答案 1 :(得分:1)
Linux系统实现了Berkeley套接字API,所以是的,你可以打开其他机器的通信。
为此,您可以使用包java.net。对于套接字连接,我们可以使用:Socket,ServerSocket和SocketAddress。
Socket用于客户端,ServerSocket用于创建套接字服务器,SocketAddress用于提供将用作目标套接字的信息。
如图所示,请查看以下项目:
First Project SocketServerApp.java - 构建它然后运行java -jar SocketServerApp.jar
package socketserverapp;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class SocketServerApp {
public static void main(String[] args) throws IOException {
//we defines all the variables we need
ServerSocket server = null;
Socket client = null;
byte[] receivedBuff = new byte[64];
int receivedMsgSize;
try
{
//activate port 8881 as our socket server
server = new ServerSocket(8881);
System.out.println("Server started");
//receiving connection from client
client = server.accept();
System.out.println("Client connected");
}
catch (IOException e)
{
System.out.println(e.getMessage());
System.exit(-1);
}
//prepare data stream
InputStream in = client.getInputStream();
OutputStream out = client.getOutputStream();
//greet user if there is a client connection
String data;
data = "Hello from the Server!";
out.write(data.getBytes());
//accepting data from client and display it in the console.
java.util.Arrays.fill(receivedBuff, (byte)0);
while (true) {
receivedMsgSize = in.read(receivedBuff);
data = new String(receivedBuff);
//if client type "exit", then exit loop and close everything
if (data.trim().equals("exit"))
{
out.write(data.getBytes());
break;
}
java.util.Arrays.fill(receivedBuff, (byte)0);
System.out.println ("Client: " + data);
}
//close all resources before exiting
out.close();
in.close();
client.close();
server.close();
}
}
第二个项目是SocketClientApp.java - 构建它然后运行java -jar SocketClientApp.jar
package socketclientapp;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
public class SocketClientApp {
public static void main(String[] args) throws IOException {
Socket client = null;
InputStream in = null;
OutputStream out = null;
byte[] receivedMsg = new byte[64];
try {
client = new Socket("localhost", 8881);
in = client.getInputStream();
out = client.getOutputStream();
} catch (UnknownHostException e) {
System.err.println(e.getMessage());
System.exit(1);
} catch (IOException e) {
System.err.println(e.getMessage());
System.exit(1);
}
String fromServer;
String fromUser;
in.read(receivedMsg);
fromServer = new String(receivedMsg);
System.out.println("Server: " + fromServer);
fromUser = "Hello from Client";
System.out.println("Sent to server: " + fromUser);
out.write(fromUser.getBytes());
fromUser = "exit";
out.write(fromUser.getBytes());
System.out.println("Sent to server: " + fromUser);
out.close();
in.close();
client.close();
}
}
简言之,这是一个TCP / IP通信。这种通信方法在拥有多种软件的企业中非常常见。
希望有所帮助。