配置嵌入式Jetty支持注解Servlet和JSP

目录结构

│  pom.xml
│
└─src
    ├─main
    │  ├─java
    │  │  └─com
    │  │      └─example
    │  │              EmbeddedJettyWebApp.java
    │  │              HelloWorldServlet.java
    │  │
    │  ├─resources
    │  └─webapp
    │      │  index.jsp
    │      │
    │      └─WEB-INF
    └─test
        └─java

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>web-app-embedded-jetty-9</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>




        <!-- Jetty Server -->
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-server</artifactId>
            <version>9.4.35.v20201120</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlet</artifactId>
            <version>9.4.35.v20201120</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-webapp</artifactId>
            <version>9.4.35.v20201120</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-annotations</artifactId>
            <version>9.4.35.v20201120</version>
        </dependency>

        <!--jsp support for jetty -->
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>apache-jsp</artifactId>
            <version>9.4.45.v20220203</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>apache-jstl</artifactId>
            <version>9.4.45.v20220203</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
            </plugin>

            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.4.45.v20220203</version>
            </plugin>
        </plugins>
    </build>
</project>

EmbeddedJettyWebApp.java

package com.example;

import org.eclipse.jetty.annotations.AnnotationConfiguration;
import org.eclipse.jetty.plus.webapp.EnvConfiguration;
import org.eclipse.jetty.plus.webapp.PlusConfiguration;
import org.eclipse.jetty.server.NetworkTrafficServerConnector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.eclipse.jetty.util.thread.ThreadPool;
import org.eclipse.jetty.webapp.Configuration;
import org.eclipse.jetty.webapp.FragmentConfiguration;
import org.eclipse.jetty.webapp.MetaInfConfiguration;
import org.eclipse.jetty.webapp.WebAppContext;
import org.eclipse.jetty.webapp.WebInfConfiguration;
import org.eclipse.jetty.webapp.WebXmlConfiguration;

public class EmbeddedJettyWebApp {

    public static void main(String[] args) throws Exception {
        Server server = new Server(createThreadPool());

        NetworkTrafficServerConnector connector = new NetworkTrafficServerConnector(server);
        connector.setPort(9090);
        connector.setHost("localhost");

        server.addConnector(connector);

        WebAppContext webAppContext = new WebAppContext();
        webAppContext.setContextPath("/");
        webAppContext.setResourceBase("src/main/webapp");

        webAppContext.setConfigurations(new Configuration[]{
            new AnnotationConfiguration(), new WebXmlConfiguration(),
            new WebInfConfiguration(), new PlusConfiguration(),
            new MetaInfConfiguration(), new FragmentConfiguration(),
            new EnvConfiguration()
        });

        webAppContext.setAttribute(
                "org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern",
                ".*/target/classes/|.*\\.jar");

        webAppContext.setParentLoaderPriority(true);

        server.setHandler(webAppContext);

        server.setStopAtShutdown(true);

        server.start();
        server.join();
    }

    private static ThreadPool createThreadPool() {
        QueuedThreadPool threadPool = new QueuedThreadPool(5);
        return threadPool;
    }
}

HelloWorldServlet.java

package com.example;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.annotation.WebServlet;

@WebServlet("/HelloWorld")
public class HelloWorldServlet extends HttpServlet {

    public void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<h1>Hello World</h1>");
        out.close();
    }

}

index.jsp

<!DOCTYPE html>
<html>
    <body>
        <p>
            Today's date: <%= (new java.util.Date()).toLocaleString() %>
        </p>
    </body>
</html>