本文介绍一个使用Jetty开发的Web的小例子。
Jetty是一个开源的servlet容器，它为基于Java的web容器（例如JSP和servlet）提供运行环境。可以把它理解为和Tomcat一样，不过Jetty更小更轻量级。如果想更深入学习Jetty推荐看：http://blog.sina.com.cn/s/blog_9ed7f0d70101ivsu.html，这里面的一系列的文章分别对jetty服务流程、对静态资源的访问方法、把servlet部署到jetty里面、ContextHandler 的使用，都做了非常简洁、通俗易懂的介绍，本文就“把servlet部署到jetty里面”做介绍
本文使用的Maven建工程，对Maven不熟悉的请看：http://blog.csdn.net/tiandixuanwuliang/article/details/78752881
下面开始介绍这个小例子：
1、在maven项目中配置jetty和servlet
<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>testJetty</groupId><artifactId>testJetty</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.compile.version>1.8</project.compile.version><servlet.version>3.1.0</servlet.version><jsp.version>2.2</jsp.version><jstl.version>1.2.5</jstl.version><jetty.version>8.1.10.v20130312</jetty.version></properties><dependencies><!-- Web Dependencies start --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>${servlet.version}</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>${jsp.version}</version></dependency><dependency><groupId>org.apache.taglibs</groupId><artifactId>taglibs-standard-compat</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>org.apache.taglibs</groupId><artifactId>taglibs-standard-impl</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>org.apache.taglibs</groupId><artifactId>taglibs-standard-jstlel</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>org.apache.taglibs</groupId><artifactId>taglibs-standard-spec</artifactId><version>${jstl.version}</version></dependency><!-- Web Dependencies end --><!-- jetty start --><dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-server</artifactId><version>9.0.0.v20130308</version></dependency><dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-webapp</artifactId><version>9.0.0.v20130308</version></dependency><dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-continuation</artifactId><version>9.0.0.v20130308</version></dependency><dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-jsp</artifactId><version>9.0.0.v20130308</version></dependency><!-- jetty end --></dependencies>
</project>import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;@SuppressWarnings("serial")
public class MainServlet extends HttpServlet{@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {req.setCharacterEncoding("utf-8");resp.setCharacterEncoding("utf-8");resp.setHeader("content-type","text/html;charset=UTF-8");System.out.println("servlet运行起来了");resp.getWriter().write("servlet运行起来了");resp.getWriter().close(); }
}3、写Jetty启动文件（注意：不能加包名）
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;import com.welljoint.MainServlet;
public class HelloJetty {/*** @throws Exception * @Title: main * @Description:启动jetty,程序入口* @param args* @throws */public static void main(String[] args) throws Exception{Server server = new Server(8080);//servletContextHandler是把servlet部署到jetty里面的桥梁ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS); //所有请求都要经过jetty context.setContextPath("/"); server.setHandler(context);//配置servlet请求路径 context.addServlet(new ServletHolder(new MainServlet()), "/hello"); server.start();server.join();}
}如图：
