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  • jetty之嵌入式开发

      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=".srcmainwebappweb.xml"/>
            <property name="resourceBase" value=".srcmainwebapp"/>
            <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!

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  • 原文地址:https://www.cnblogs.com/ll409546297/p/9338837.html
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