一、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。Jetty是使用Java语言编写的,它的API以一组JAR包的形式发布。开发人员可以将Jetty容器实例化成一个对象,可以迅速为一些独立运行(stand-alone)的Java应用提供网络和web连接。
二、嵌入式的开发,可以将容器直接嵌入到代码中,这样启动容器,就不需要单独使用中间件了,比如:tomcat等
三、这里介绍两种jetty的启动方式,1:代码直接启动,2:spring的ClassPathXmlApplicationContext启动(推荐后一种启动方式)
四、具体的例子:
1、需要的依赖包
<?xml version="1.0" encoding="UTF-8"?> <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.pinnet</groupId> <artifactId>spring-jetty</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.0.7.RELEASE</version> </dependency> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-servlet</artifactId> <version>9.2.9.v20150224</version> </dependency> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-webapp</artifactId> <version>9.2.9.v20150224</version> </dependency> <dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-jsp</artifactId> <version>9.2.9.v20150224</version> </dependency> </dependencies> </project>
2、web.xml的配置,基本上没啥变化
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>springMvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-config.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/</url-pattern> </filter-mapping> </web-app>
3、启动方式:
1)代码手写启动
package com.pinnet.jetty; import org.eclipse.jetty.server.Server; import org.eclipse.jetty.webapp.WebAppContext; public class JettyStart { public static void main(String[] args) throws Exception { //设置端口,可以设置多个端口 Server server = new Server(8080); //web应用参数设置 WebAppContext context = new WebAppContext(); //项目上下文 context.setContextPath("/"); //web.xml路径,主要是解析其中的配置 context.setDescriptor("./src/main/webapp/web.xml"); //静态资源路径 context.setResourceBase("./src/main/webapp"); context.setParentLoaderPriority(true); //展示URL日志 context.setLogUrlOnStart(true); server.setHandler(context); server.start(); } }
2)容器启动:
package com.pinnet.jetty; import org.springframework.context.support.ClassPathXmlApplicationContext; public class AppStart { public static void main(String[] args) { new ClassPathXmlApplicationContext("spring-jetty.xml"); } }
配置:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="webAppContext" class="org.eclipse.jetty.webapp.WebAppContext"> <property name="contextPath" value="/"/> <property name="descriptor" value=".\src\main\webapp\web.xml"/> <property name="resourceBase" value=".\src\main\webapp\"/> <property name="parentLoaderPriority" value="true"/> <property name="logUrlOnStart" value="true"/> </bean> <bean id="server" class="org.eclipse.jetty.server.Server" init-method="start" destroy-method="stop"> <property name="connectors"> <list> <bean class="org.eclipse.jetty.server.ServerConnector"> <constructor-arg ref="server"/> <property name="port" value="8080"/> </bean> </list> </property> <property name="handler" ref="webAppContext"/> </bean> </beans>
具体:解释如代码启动一样!