Learn from the technical principles of Java -class libraries of the W3C JIGSAW framework
Learn from the technical principles of Java -class libraries of the W3C JIGSAW framework
Overview:
W3C Jigsaw is a Java -based open source Java Servlet container for building high -performance, scalable web servers.It is developed by W3C (World Wide Web Consortium) and uses Java -class library technology to achieve various web services and functions.This article will explore the technical principles of the Java class library of the W3C JIGSAW framework and explain it through the Java code example.
1. Java class library technical principle:
W3C Jigsaw uses the Java class library technology to achieve its core function.It provides underlying network communication support based on Socket, Serversocket, DataGramsocket, etc.At the same time, it also uses Java's multi -threaded technology, which can handle the requests of multiple clients at the same time to improve the complicated processing capacity of the server.In addition, W3C JIGSAW also uses the Java's reflection mechanism to dynamically load and call classes to achieve a highly scalable architecture, allowing developers to easily add custom functions and extension modules.
2. Application example of Java library technology in W3C JIGSAW:
Here are some examples that show the specific application of Java -class library technology in the W3C JIGSAW framework.
Example 1: Use the socket class to send and receive the HTTP request
import java.io.*;
import java.net.Socket;
public class HTTPClient {
public static void main(String[] args) {
try {
Socket clientSocket = new Socket("www.example.com", 80);
BufferedWriter outToServer = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
// Send GET request
outToServer.write("GET /index.html HTTP/1.0\r
");
outToServer.write("Host: www.example.com\r
");
outToServer.write("\r
");
outToServer.flush();
// Receive response
String response;
StringBuilder sb = new StringBuilder();
while ((response = inFromServer.readLine()) != null) {
sb.append(response);
}
System.out.println(sb.toString());
// Turn off the connection
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Example 2: Use multi -threaded technology to process concurrent requests
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
public class HTTPServer {
public static void main(String[] args) {
try {
ServerSocket serverSocket = new ServerSocket(8080);
System.out.println("Server is running on port 8080...");
while (true) {
// Listen to the connection request of the client
Socket clientSocket = serverSocket.accept();
// The task of handling client requests is entrusted to the new thread
Thread workerThread = new Thread(() -> handleRequest(clientSocket));
workerThread.start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static void handleRequest(Socket clientSocket) {
try {
BufferedReader inFromClient = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
BufferedWriter outToClient = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
// Receive client requests
String request;
while ((request = inFromClient.readLine()) != null) {
System.out.println(request);
}
// Send the response to the client
outToClient.write("HTTP/1.0 200 OK\r
");
outToClient.write("Content-Type: text/html\r
");
outToClient.write("\r
");
outToClient.write("<html><head><title>Hello World</title></head><body>Hello World!</body></html>\r
");
outToClient.flush();
// Turn off the connection
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Summarize:
By using the Java class library technology, the W3C Jigsaw framework realizes flexible and scalable high -performance Web servers.Developers can use Java's network programming, multi -threaded, and reflex mechanisms to build custom functions and expansion modules.The simple example shown in this article is just the tip of the iceberg technology of the Java -class library technology in the W3C Jigsaw framework. Mastering these principles can help more deeply understand the working principle of W3C JIGSAW and other JAVA -based Web server frameworks.
