Use the "Core :: Server" framework in the Java Library to build a server
Use the "Core :: Server" framework in the Java Library to build a server
Overview:
It is a common task to build a server in the Java application.The "Core :: Server" framework in the Java class library provides developers with a simple and powerful way to create high -performance server applications.This article will introduce how to use the "Core :: Server" framework to build a server and provide related Java code examples.
1. Introduce the framework:
First, we need to introduce the "Core :: Server" framework in the Java project.You can use Maven or Gradle to build a tool to add the framework to the dependencies of the project.In the pom.xml file of the Maven project, the following dependencies are added:
<dependencies>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>9.4.43.v20210629</version>
</dependency>
</dependencies>
2. Create a server:
In the Java code, we can build a server by creating a Jetty server object.The following is a sample code for creating a server:
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.handler.DefaultHandler;
import org.eclipse.jetty.server.handler.HandlerList;
public class MyServer {
public static void main(String[] args) throws Exception {
Server server = new server (8080); // Create an Jetty server object and specify the wounded port
// Create a processor list and add a custom processor
HandlerList handlers = new HandlerList();
handlers.Sethandlers (new handler [] {new myHandler ()}); // Add custom processor
Server.Sethandler (handlers); // Set the processor list as the processor of the server
Server.start (); // Start the server
server.Join (); // Waiting for the server to stop
}
}
In the above example code, we created a Jetty server object and set the monitor port to 8080.We then created a processor list and added custom processors to the list.Finally, we set the processor list to the processor of the server and start the server.
3. Create a custom processor:
In order to enable the server to handle client requests, we need to create a custom processor.The following is a simple example code:
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.handler.AbstractHandler;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
public class MyHandler extends AbstractHandler {
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/plain; charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
baseRequest.setHandled(true);
PrintWriter writer = response.getWriter();
writer.println ("Welcome to the server!"); // Return welcome to the client
}
}
The above example code creates a custom processor class `myHandler`, inherited from the` Abstracthandler` class.In the `Handle` method, we set the content and status of the response, and return a simple welcome message to the client.
4. Test server:
After completing the above steps, our server can already run.By visiting `http: // localhost: 8080`, we should be able to see welcome news.
Summarize:
The use of the "Core :: Server" framework in the Java class library to build a server is a relatively simple and powerful process.According to the above steps, we can introduce a framework, create a server, and custom processor. We can easily build a high -performance server application.This allows us to handle client requests and return data or perform other operations according to needs.I wish you successfully build a server!
