嵌入式Jetty开发之代码启动Jetty

,# 嵌入式Jetty开发之代码启动Jetty
目前正在做嵌入式Jetty开发，把遇到的问题写出来，希望可以帮到有同样问题的小伙伴，也方便自己下次遇到同样问题时查看

背景：之前项目用Tomcat，然后老大说新项目采用Jetty代码启动，让我先进行调研和使用
最开始看Jetty的官方文档，配合某位大牛的中文翻译文档，然后遇到各种问题各种查网上的资料
最后修改主要这两个文件：

• POM配置文件
• 主类代码

POM配置文件

之前加了太多相关的配置文件，然后生产模式war包运行各种出错，然后删掉了一些依赖就好了，想必是画蛇添足，造成了类的冲突，这是修改后的文件：

    <properties>        <spring.version>4.3.6.RELEASE</spring.version>        <jetty.version>9.3.21.v20170918</jetty.version>    </properties>    <dependencies>        <!-- jetty -->        <dependency>            <groupId>org.eclipse.jetty</groupId>            <artifactId>jetty-server</artifactId>            <version>${jetty.version}</version>            <scope>provided</scope> <!-- 开发模式去掉这个 -->        </dependency>        <dependency>            <groupId>org.eclipse.jetty</groupId>            <artifactId>jetty-webapp</artifactId>            <version>${jetty.version}</version>            <scope>provided</scope><!-- 开发模式去掉这个 -->        </dependency>    </dependencies>    <build>        <finalName>文件名称</finalName>        <plugins>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-war-plugin</artifactId>                <version>2.3</version>                <configuration>                    <archive>                        <manifest>                            <mainClass>com.my.example.JettyLauncher</mainClass>                        </manifest>                    </archive>                    <warName>${project.artifactId}-standalone</warName>                </configuration>            </plugin>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-antrun-plugin</artifactId>                <version>1.7</version>                <executions>                    <execution>                        <id>main-class-placement</id>                        <phase>prepare-package</phase>                        <configuration>                            <target>                                <move todir="${project.build.directory}/${project.artifactId}/">                                    <fileset dir="${project.build.directory}/classes/">                                        <include name="**/*/JettyLauncher.class" />                                    </fileset>                                </move>                            </target>                        </configuration>                        <goals>                            <goal>run</goal>                        </goals>                    </execution>                </executions>            </plugin>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-dependency-plugin</artifactId>                <version>2.5.1</version>                <executions>                    <execution>                        <id>jetty-classpath</id>                        <phase>prepare-package</phase>                        <goals>                            <goal>unpack-dependencies</goal>                        </goals>                        <configuration>                            <includeGroupIds>org.eclipse.jetty, org.eclipse.jetty.orbit,                                javax.servlet</includeGroupIds>                            <includeScope>provided</includeScope>                            <!-- remove some files in order to decrease size -->                            <excludes>*, about_files/*, META-INF/*</excludes>                            <!-- <excludeArtifactIds>jsp-api,jstl</excludeArtifactIds> -->                            <outputDirectory>                                ${project.build.directory}/${project.artifactId}                            </outputDirectory>                        </configuration>                    </execution>                </executions>            </plugin>            <!-- to support compilation in linux -->            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <version>2.5.1</version>                <configuration>                    <target>1.6</target>                    <source>1.6</source>                    <encoding>UTF-8</encoding>                </configuration>            </plugin>        </plugins>    </build>

JettyLauncher

jetty启动的主类代码：

public class JettyLauncher {    public static final int PORT = 8080;    public static final String CONTEXT = "/test";    private static final String DEFAULT_WEBAPP_PATH = "src/main/webapp";    /**     * 创建用于生产环境的Jetty Server     */    public static Server createProdServer(int port, String contextPath) {        Server server = new Server(port);        server.setStopAtShutdown(true);        ProtectionDomain protectionDomain = JettyLauncher.class.getProtectionDomain();        URL location = protectionDomain.getCodeSource().getLocation();        String warFile = location.toExternalForm();        System.out.println("war file path:"+warFile);        WebAppContext context = new WebAppContext(warFile, contextPath);        context.setServer(server);        // 设置work dir,war包将解压到该目录，jsp编译后的文件也将放入其中。        String currentDir = new File(location.getPath()).getParent();        File workDir = new File(currentDir, "work");        context.setTempDirectory(workDir);        server.setHandler(context);        return server;    }    /**     * 创建用于开发运行调试的Jetty Server, 以src/main/webapp为Web应用目录.     */    public static Server createDevServer(int port, String contextPath) {        Server server = new Server();        // 设置在JVM退出时关闭Jetty的钩子。        server.setStopAtShutdown(true);        //这是http的连接器        ServerConnector connector = new ServerConnector(server);        connector.setPort(port);        // 解决Windows下重复启动Jetty居然不报告端口冲突的问题.        connector.setReuseAddress(false);        server.setConnectors(new Connector[] { connector });        WebAppContext webContext = new WebAppContext(DEFAULT_WEBAPP_PATH, contextPath);        //webContext.setContextPath("/");        webContext.setDescriptor("src/main/webapp/WEB-INF/web.xml");        // 设置webapp的位置        webContext.setResourceBase(DEFAULT_WEBAPP_PATH);        webContext.setClassLoader(Thread.currentThread().getContextClassLoader());        server.setHandler(webContext);        return server;    }    /**     * 启动jetty服务     *     * @param port     * @param context     */    public void startJetty(int port, String context, String env) {        Server server = null;        if ("dev".equals(env)) {            server= JettyLauncher.createDevServer(port, context);        }else {            server= JettyLauncher.createProdServer(port, context);        }        try {            server.stop();            server.start();            server.join();        } catch (Exception e) {            e.printStackTrace();            System.exit(-1);        }    }    public static void main(String[] args) {        new JettyLauncher().startJetty(8080, "/test,"dev");//dev为开发模式    }}

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开发模式：去掉依赖中的<scope>provide<scope>以及main函数参数为dev,然后运行主类即可生产模式：        打包： mvn package                  cd target              java -jar xx.war

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主要参考：
[1]:嵌入式Jetty Web开发