The detailed explanation of the Jetty framework in the Java library to process HTTP requests and responses (Detailed Explanation of handling HTTP Requests and Responses userwork in Java Class Libraries)

The Jetty framework is a lightweight, embedded Java HTTP server, which provides a rich function for processing HTTP requests and responses.This article will introduce the method of processing the HTTP request and response in the Java library in the Java library in detail, and provide a related Java code example. 1. Introduce jetty dependencies First, we need to introduce Jetty dependencies in the project.You can obtain the latest version of the Jetty framework through Maven or Gradle: <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-server</artifactId> <version>9.4.43.v20210629</version> </dependency> 2. Create the Jetty server To handle HTTP requests and responses, we need to create an Jetty server instance.Below is a simple Java code example, demonstrating how to create and start the Jetty server: import org.eclipse.jetty.server.Server; public class JettyServerExample { public static void main(String[] args) throws Exception { // Configure the processor of the request for processing request server.setHandler(new MyHandler()); Server.start (); // Start the jetty server server.Join (); // Waiting for the server to stop } } In the above example, we created an Jetty server instance with 8080, and set the request processor to `myHandler`.`START ()` method is used to start the server, the method is used to wait for the server to stop. 3. Create a request processor 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/html; charset=utf-8"); // Prepare the content of the response String responseBody = "Hello, Jetty!"; response.setStatus(HttpServletResponse.SC_OK); response.setContentLength(responseBody.length()); // Send the response content PrintWriter writer = response.getWriter(); writer.print(responseBody); // State that the request has been processed baseRequest.setHandled(true); } } 4. Configure the Jetty server In addition to request processors, the Jetty server can also be configured in various ways to meet different needs.Here are some common configuration examples: -Configure the context path: import org.eclipse.jetty.servlet.ServletContextHandler; // Create a processor with the context path ServletContextHandler context = new ServletContextHandler(); context.setContextPath("/myapp"); context.Sethandler (new myHandler ()); // Set the processor Server.Sethandler (context); // Set the server's processor as context processor In the above example, we created a `ServletContextHandler` with the context path`/myapp '.Then, we set the processor to `myHandler` and set the context processor to the processor of the server. -The configure https support: import org.eclipse.jetty.util.ssl.SslContextFactory; SslContextFactory sslContextFactory = new SslContextFactory(); sslContextFactory.setKeyStorePath("/path/to/keystore"); sslContextFactory.setKeyStorePassword("password"); ServerConnector sslConnector = new ServerConnector(server, sslContextFactory); sslconnector.setport (8443); // Set the port of SSL Server.addConnector (SSLConnector); // Add SSL connector In the above example, we created a `SSLContextFactory` object to configure the SSL context factory, specifying the path and password of the key library.Then, we create a SSL connector through the `ServerConnector` and add it to the server. -The configuration request filter: import org.eclipse.jetty.servlet.FilterHolder; import org.eclipse.jetty.servlet.ServletHolder; import org.eclipse.jetty.servlet.ServletHandler; ServletHandler servletHandler = new ServletHandler(); // Add a filter FilterHolder filterHolder = servletHandler.addFilter(MyFilter.class, "/*", EnumSet.of(DispatcherType.REQUEST)); Filterholder.setasyncsupported (TRUE); // Set the filter to support asynchronous requests // Add servert ServletHolder servletHolder = servletHandler.addServlet(MyServlet.class, "/myservlet"); servletholder.setasyncsupported (true); // Set the service asynchronous request Server.Sethandler (serverthandler); // Set the server's processor as a Servlet processor In the above example, we created an object of `Servlethandler`, and used the` addfilter () `method to add a filter` myFilter`, and add a service`Myservlet` by `addservlet ()` method.We also set up filters and Servlet to support asynchronous requests. Through the above steps, we successfully handled the HTTP request and response in the Java class library through the Jetty framework.You can make more advanced configuration and functional expansion according to specific needs. The Jetty framework provides rich APIs to meet different needs.