JETTY嵌入式Web容器的開發(一)---基礎開發

時間 2019-11-12

標籤 jetty 嵌入 web 容器開發基礎欄目 Jetty 简体版

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<h4>qiuJETTY嵌入式Web容器的開發(一)---基礎開發</h4> JETTY嵌入式Web容器體積小,啓動速度快,性能好,免費開源,是一款很適合開發調試和簡單演示的輕量級Web容器. 並且它的嵌入式的特色,使得開發者能夠直接將容器的操做包含在程序邏輯裏,得以擺脫TOMCAT,JBOSS等獨立容器帶來的安裝,維護,部署等一系列使人頭疼的問題. <h5>JETTY嵌入式開發步驟</h5> <ul> <li>下載 </li> </ul> 本文采用的是2012年最新版本的JETTY8 (8.1.4版) jetty-hightide-8.1.4.v20120524.zip <ul> <li>ECLIPSE創建一個普通JAVA項目testjetty </li> </ul> 注意: 是JAVA  APPLICATION項目,不是WAR項目. JDK要1.6 在項目裏創建jetty目錄 目錄下再創建etc目錄 將jetty-hightide-8.1.4.v20120524.zip包中etc目錄下的jetty.xml和webdefault.xml文件拷貝入新建的 /jetty/etc目錄下 將jetty-hightide-8.1.4.v20120524.zip文件中lib/目錄下的全部jar文件和lib/jsp子目錄下的全部jar文件都加入項目的buildPath (不少討論JETTY開發的文章老是在最小JAR包數上作文章,我以爲初學者仍是應該將全部JAR包都加入,由於做爲一款Web 容器,JETTY的JAR容納了大量的細節功能. 有的JAR包你沒有加入,也許測HELLOWORLD這類功能可以經過,但在真正的商用頁面裏,就會針對各類HTTP元素出問題) 在項目裏建webRoot目錄 webRoot目錄下創建WEB-INF目錄,之後web.xml就放在這裏 建成的項目的結構以下: <a href="http://photo.blog.sina.com.cn/showpic.html#blogid=6151984a01014zjz&url=http://s1.sinaimg.cn/orignal/6151984agc40d513abd10"><img title="JETTY嵌入式Web容器的開發(一)---基礎開發" alt="JETTY嵌入式Web容器的開發(一)---基礎開發" src="http://s1.sinaimg.cn/middle/6151984agc40d513abd10&690" width="346" height="239" /></a> <ul> <li>修改/jetty/etc/jetty.xml </li> </ul> 我作了下面兩處修改(粗體),以利於測試 <?xml version="1.0"?> <!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure.dtd"> <Configure id="Server" class="org.eclipse.jetty.server.Server"> <Set name="ThreadPool">  <New class="org.eclipse.jetty.util.thread.QueuedThreadPool"> <Set name="minThreads">30</Set> <Set name="maxThreads">200</Set> <Set name="detailedDump">false</Set> </New> </Set> <Call name="addConnector"> <Arg> <New class="org.eclipse.jetty.server.nio.SelectChannelConnector"> <Set name="host"><Property name="jetty.host" /></Set> <Set name="port"><Property name="jetty.port" default="8088"/></Set> <Set name="maxIdleTime">300000</Set> <Set name="Acceptors">2</Set> <Set name="statsOn">false</Set> <Set name="confidentialPort">8443</Set> <Set name="lowResourcesConnections">20000</Set> <Set name="lowResourcesMaxIdleTime">5000</Set> </New> </Arg> </Call> <ul> <li>JETTY  Service類 </li> </ul> package org.jetty.demo; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import org.apache.commons.lang.StringUtils; import org.eclipse.jetty.server.Server; import org.eclipse.jetty.server.handler.ContextHandlerCollection; import org.eclipse.jetty.webapp.WebAppContext; import org.eclipse.jetty.xml.XmlConfiguration; import org.xml.sax.SAXException; public class JettyCustomServer extends Server { private String xmlConfigPath; private String contextPath; private String warPath; private String resourceBase = "./webRoot"; private String webXmlPath = "./webRoot/WEB-INF/web.xml"; public JettyCustomServer(String xmlConfigPath,String contextPath,String resourceBase,String webXmlPath) { this(xmlConfigPath,contextPath,resourceBase,webXmlPath,null); } public JettyCustomServer(String xmlConfigPath,String contextPath) { this(xmlConfigPath,contextPath,null,null,null); } public JettyCustomServer(String xmlConfigPath,String contextPath,String warPath) { this(xmlConfigPath,contextPath,null,null,warPath); } public JettyCustomServer(String xmlConfigPath,String contextPath,String resourceBase,String webXmlPath,String warPath) { super(); if(StringUtils.isNotBlank(xmlConfigPath)){ this.xmlConfigPath = xmlConfigPath; readXmlConfig(); } if(StringUtils.isNotBlank(warPath)){ this.warPath = warPath; if(StringUtils.isNotBlank(contextPath)){ this.contextPath = contextPath; applyHandle(true); } }else{ if(StringUtils.isNotBlank(resourceBase)) this.resourceBase = resourceBase; if(StringUtils.isNotBlank(webXmlPath)) this.webXmlPath = webXmlPath; if(StringUtils.isNotBlank(contextPath)){ this.contextPath = contextPath; applyHandle(false); } } } private void readXmlConfig(){ try { XmlConfiguration configuration =  new XmlConfiguration(new FileInputStream(this.xmlConfigPath)); configuration.configure(this); } catch (FileNotFoundException e1) { e1.printStackTrace(); } catch (SAXException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } public void applyHandle(Boolean warDeployFlag){ ContextHandlerCollection handler = new ContextHandlerCollection(); WebAppContext webapp = new WebAppContext(); webapp.setContextPath(contextPath); webapp.setDefaultsDescriptor("./jetty/etc/webdefault.xml"); if(!warDeployFlag){ webapp.setResourceBase(resourceBase); webapp.setDescriptor(webXmlPath);  }else{ webapp.setWar(warPath); } handler.addHandler(webapp); super.setHandler(handler); } public void startServer(){ try { super.start(); System.out.println("current thread:"+super.getThreadPool().getThreads()+"| idle thread:"+super.getThreadPool().getIdleThreads()); super.join(); } catch (Exception e) { e.printStackTrace(); } } public String getXmlConfigPath() { return xmlConfigPath; } public void setXmlConfigPath(String xmlConfigPath) { this.xmlConfigPath = xmlConfigPath; } public String getContextPath() { return contextPath; } public void setContextPath(String contextPath) { this.contextPath = contextPath; } public String getResourceBase() { return resourceBase; } public void setResourceBase(String resourceBase) { this.resourceBase = resourceBase; } public String getWebXmlPath() { return webXmlPath; } public void setWebXmlPath(String webXmlPath) { this.webXmlPath = webXmlPath; } public String getWarPath() { return warPath; } public void setWarPath(String warPath) { this.warPath = warPath; } } <ul> <li>作一個簡單的可執行的服務啓動類 </li> </ul> package org.jetty.demo; public class JettyServerStart { public static void main(String[] args) { JettyCustomServer server = newJettyCustomServer("./jetty/etc/jetty.xml","/testContext"); server.startServer(); } } <ul> <li>/webRoot/目錄下作一個JSP測試頁面 </li> </ul> <%@ page language="java" contentType="text/html; charset=GBK" pageEncoding="GBK"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GBK"> <title>Insert title here</title> </head> <body> hello jetty! 中國! </body> </html> <ul> <li>作一個測試Servlet </li> </ul> package org.jetty.demo; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class HelloWorldServlet extends HttpServlet{ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("doGet"); resp.getWriter().write("hello world!"); resp.getWriter().close(); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("doPost"); super.doPost(req, resp); } } <ul> <li>/webRoot/WEB-INF目錄下創建一個web.xml </li> </ul> <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name></display-name> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>HelloWorldServlet</servlet-name> <servlet-class>org.jetty.demo.HelloWorldServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloWorldServlet</servlet-name> <url-pattern>/servlet/HelloWorldServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> <a href="http://photo.blog.sina.com.cn/showpic.html#blogid=6151984a01014zjz&url=http://s8.sinaimg.cn/orignal/6151984agc40d54265d77"><img title="JETTY嵌入式Web容器的開發(一)---基礎開發" alt="JETTY嵌入式Web容器的開發(一)---基礎開發" src="http://s8.sinaimg.cn/middle/6151984agc40d54265d77&690" width="346" height="239" /></a> <ul> <li>啓動服務 </li> </ul> 執行JettyServerStart CONSOLE日誌: 2012-06-27 15:49:35.250:INFO:oejs.Server:jetty-8.1.4.v20120524 2012-06-27 15:49:35.484:INFO:oejsh.ContextHandler:started o.e.j.w.WebAppContext{/testContext,file:/D:/RND/javaathome/eclipsehelio/testjetty/webRoot/} 2012-06-27 15:49:35.484:INFO:oejsh.ContextHandler:started o.e.j.w.WebAppContext{/testContext,file:/D:/RND/javaathome/eclipsehelio/testjetty/webRoot/} 2012-06-27 15:49:35.703:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:8088 current thread:30| idle thread:26 看紅字部分,記得咱們在./jetty/etc/jetty.xml文件中作的修改麼? 測試 測試訪問JSP頁面 <a href="http://localhost:8088/testContext/index.jsp">http://localhost:8088/testContext/index.jsp</a> <a href="http://photo.blog.sina.com.cn/showpic.html#blogid=6151984a01014zjz&url=http://s8.sinaimg.cn/orignal/6151984ag7a015563df77"><img title="JETTY嵌入式Web容器的開發(一)---基礎開發" alt="JETTY嵌入式Web容器的開發(一)---基礎開發" src="http://s8.sinaimg.cn/middle/6151984ag7a015563df77&690" width="357" height="225" /></a> 測試訪問SERVLET <a href="http://localhost:8088/testContext/servlet/HelloWorldServlet">http://localhost:8088/testContext/servlet/HelloWorldServlet</a> <a href="http://photo.blog.sina.com.cn/showpic.html#blogid=6151984a01014zjz&url=http://s8.sinaimg.cn/orignal/6151984ag7a015583e6a7"><img title="JETTY嵌入式Web容器的開發(一)---基礎開發" alt="JETTY嵌入式Web容器的開發(一)---基礎開發" src="http://s8.sinaimg.cn/middle/6151984ag7a015583e6a7&690" width="395" height="170" /></a>html