通过Jetty搭建一个简单的Servlet运行环境

豆包ko

博客已经迁移至 萌萌的IT人 ，谢谢支持

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最近在做一些简单的Servlet开发的时候,感觉每次调试的时候都要发布到tomcat上很麻烦,把程序共享给同事也很麻烦,需要帮他设置本地的tomcat环境. 在网上找了找其他的Servlet运行环境,发现用Jetty可以很方便的实现嵌入式Web container.这里我记录一下通过Jetty搭建简单Servlet运行环境的过程,希望对有同样需要的朋友有所帮助.
整个环境的代码可以在https://github.com/mcai4gl2/jettysetup找到. 代码包括了IntelliJ的项目文件,如果需要eclipse项目文件,请在下载代码后运行 mvn eclipse:eclipse 来生成eclipse项目文件. (当然, 请在本地安装Maven).
 

• 设置Maven Dependency:
  <dependencies>
  <!-- jetty -->
  <dependency>
  <groupId>org.eclipse.jetty</groupId>
  <artifactId>jetty-server</artifactId>
  <version>${jetty.version}</version>
  </dependency>
  <dependency>
  <groupId>org.eclipse.jetty</groupId>
  <artifactId>jetty-servlet</artifactId>
  <version>${jetty.version}</version>
  </dependency>
  <!-- spring -->
  <dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
  <version>${spring.version}</version>
  </dependency>
  <!-- log4j -->
  <dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.17</version>
  </dependency>
  <!-- utils -->
  <dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-io</artifactId>
  <version>1.3.2</version>
  </dependency>
  </dependencies>
   设置servlet-context.xml:
  
• 
  <?xml version="1.0" encoding="UTF-8"?>
  <beans:beans xmlns="http://www.springframework.org/schema/mvc"
  xmlns:beans="http://www.springframework.org/schema/beans"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="
  http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
  http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
  <interceptors>
  <interceptor>
  <mapping path="/*"/>
  <beans:bean class="weblog.examples.jettysetup.LoggingInterceptor"/>
  </interceptor>
  </interceptors>
  <context:annotation-config/>
  <context:component-scan base-package="weblog.examples.jettysetup.serlvet"/>
  </beans:beans>
   一个简单的Main Class:
  
• 
  public static void main(String[] args) throws Exception {
  try {
  DOMConfigurator.configure(Thread.currentThread().getContextClassLoader().getResource("log4j.xml"));
  Server server = new Server();
  SelectChannelConnector connector = new SelectChannelConnector();
  connector.setPort(7411);
  server.setConnectors(new Connector[] {connector});
  DispatcherServlet servlet = new DispatcherServlet();
  servlet.setContextConfigLocation("classpath:servlet-context.xml");
  ServletContextHandler context = new ServletContextHandler();
  context.setContextPath("/");
  context.addServlet(new ServletHolder("baseServlet", servlet), "/");
  HandlerCollection handlers = new HandlerCollection();
  handlers.setHandlers(new Handler[] { context, new DefaultHandler()});
  server.setHandler(handlers);
  XmlWebApplicationContext wctx = new XmlWebApplicationContext();
  wctx.setConfigLocation("");
  wctx.setServletContext(servlet.getServletContext());
  wctx.refresh();
  context.setAttribute(XmlWebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, wctx);
  server.start();
  log.info("Jetty embedded server started");
  log.info("Press any key to stop");
  System.in.read();
  log.info("Stopping Server");
  server.stop();
  log.info("Server stopped");
  } catch (Exception ex) {
  log.error("Failed to run Jetty Server", ex);
  throw ex;
  }
  }
   在JettyLauncher运行后,我们可以访问http://localhost:7411/ping来查看Jetty是否成功运行. http://localhost:7411/ping将运行以下Spring MVC Servlet:
  
• 
  @Controller
  public class TestServlet {
  private static Logger log = Logger.getLogger(TestServlet.class);
  @RequestMapping(value="/ping", method = RequestMethod.GET)
  public void ping(HttpServletResponse response) throws IOException {
  log.info("ping page is called");
  IOUtils.write("Embedded Jetty Server is Up and Running", response.getOutputStream());
  }
  }