Using Jetty9 for Web server processing in Java API development

In recent years, with the rapid development of Web technology, there is an increasing demand for using Java language for Web development. As a high-performance Java Web server, Jetty9 has been widely used. This article will discuss the basic features of Jetty9, server installation and configuration, and application examples.

1. Basic features of Jetty9

Jetty9 is a lightweight, embeddable, high-performance Java Web server developed and maintained by the Eclipse Software Foundation. It is a web server implemented in pure Java, supporting Servlet containers and HTTP containers, as well as protocols such as Websocket and HTTP2. Jetty9 has excellent performance and is able to maintain stable performance under high loads. In addition, Jetty9's architectural design is highly scalable and can meet the needs of applications of all sizes.

2. Server installation configuration

1. Download Jetty9, extract it to the specified path, and configure environment variables.
2. In the Jetty9 directory, find the etc/jetty.xml file, which is the configuration file of Jetty9. By modifying this file, basic configuration and optimization of the server can be achieved.

3. In order to better manage the Jetty9 server, you can use Jetty9's management tool Jetty Runner. Jetty Runner is an executable Jar file. Place it in the root directory of Jetty9 and enter the following command to start the Jetty9 server:

   java -jar jetty-runner.jar webapp.war

4. During the application development process, Jetty9 provides two ways to integrate, namely embedded and independent. Embedded is to embed the Jetty9 server into the application and be started directly by the application; independent is to use Jetty9 as an independent web server, start the application externally and be processed by Jetty9.

3. Application Example

The following is a simple Web application example based on Jetty9:

1. Create a new Dynamic Web Project in Eclipse.
2. In the newly created project, import Jetty9’s API packages jetty-server, jetty-servlet, jetty-util and servlet-api.

3. In the project's WEB-INF directory, create a configuration file named web.xml. web.xml is where the Servlet is configured, for example:

   
   hello
   com.test .HelloServlet
   

   
   hello
   /hello
   

4. Create a class named HelloServlet under the com.test package, which inherits HttpServlet. Write the logic for processing the request in the doGet method, such as outputting HelloWorld:

   public class HelloServlet extends HttpServlet {
   private static final long serialVersionUID = 1L;

   protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
   response.getWriter().write("Hello World!");
   }
   }

5. Created in the root directory of the project A configuration file named jetty.xml configures the Jetty9 server.
6. Start the server, open the browser, and enter http://localhost:8080/test/hello to access the Servlet.

4. Summary

This article discusses the basic features of Jetty9, server installation and configuration, and application examples. As a high-performance, embeddable Java web server, Jetty9 has many advantages and application scenarios in web application development, and is especially suitable for web application development that requires high performance and scalability.

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