用Jetty快速开发J2EE应用

对于用Maven管理的项目，可以使用Maven的Jetty插件启动应用进行快速测试。项目的pom.xml配置如下：

<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.cdai</groupId>
  <artifactId>struts2-conf</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  	<!-- 主要依赖库的版本定义 -->
    <properties>
		<spring.version>3.1.2.RELEASE</spring.version>
		<mybatis.version>3.1.1</mybatis.version>
		<commons-dbcp.version>1.4</commons-dbcp.version>
		<jetty.version>7.6.5.v20120716</jetty.version>
  	</properties>
  
	<dependencies>
	
		<!-- STRUTS2 begin -->
		<dependency>  
            <groupId>org.apache.struts</groupId>  
            <artifactId>struts2-core</artifactId>  
            <version>2.3.1.2</version>  
        </dependency>
        <!-- <dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-spring-plugin</artifactId>
			<version>2.3.1.2</version>
		</dependency> -->
		<!-- STRUTS2 end -->
  	
  		<!-- SPRING begin -->
  	
  		<!-- spring core begin -->
  		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
		<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${spring.version}</version>
		</dependency>
  		<!-- spring core end -->
 
  		<!-- spring data access begin -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- spring data access end -->
		
		<!-- SPRING end -->
		
	  	<!-- MYBATIS begin -->
	  	<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.1.1</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.1.1</version>
		</dependency>
		<!-- MYBATIS end -->		
		
		<!-- MYSQL begin -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.9</version>
		</dependency>
		<!-- MYSQL end -->

		<!-- COMMON begin -->

		<!-- web begin -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		<!-- jetty for functional test and executable war -->
		<dependency>
			<groupId>org.eclipse.jetty.aggregate</groupId>
			<artifactId>jetty-webapp</artifactId>
			<version>${jetty.version}</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.eclipse.jetty</groupId>
			<artifactId>jetty-jsp</artifactId>
			<version>${jetty.version}</version>
			<scope>provided</scope>
		</dependency>
		<!-- web end -->

		<!-- persistence begin -->
		<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>${commons-dbcp.version}</version>
		</dependency>
		<!-- persistence end -->
		
		<!-- aop begin -->
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
			<version>2.2.2</version>
			<scope>runtime</scope>
		</dependency>
		<!-- aop end -->
		
		<!-- COMMON end -->
		
	</dependencies>
	
	<build>
		<plugins>
			<!-- jetty插件, 设定context path与spring profile -->
			<plugin>
				<groupId>org.mortbay.jetty</groupId>
				<artifactId>jetty-maven-plugin</artifactId>
				<configuration>
					<systemProperties>
						<systemProperty>
							<name>spring.profiles.active</name>
							<value>development</value>
						</systemProperty>
					</systemProperties>
					<webAppConfig>
						<contextPath>/cdai</contextPath>
					</webAppConfig>
				</configuration>
			</plugin>
		</plugins>
	</build>
	
</project>

之后在命令行输入mvn jetty:run即可启动应用程序。Jetty插件自动将src/main/webapp作为Web应用的根目录。

此外，也可以按照下面的方法用main()方法来启动应用。

package com.cdai.web.ssh;

import java.io.File;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.WebAppContext;

public class JettyRunner {

	public static void main(String[] args) throws Exception {

		String contextPath = "/cdai";
		int port = Integer.getInteger("port", 8080);

		Server server = createServer(contextPath, port);

		try {
			server.start();
			server.join();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(100);
		}
	}

	private static Server createServer(String contextPath, int port) {
		//use Eclipse JDT compiler
		System.setProperty("org.apache.jasper.compiler.disablejsr199", "true");

		Server server = new Server(port);
		server.setStopAtShutdown(true);

		String warFile = "src/main/webapp";
		WebAppContext context = new WebAppContext(warFile, contextPath);
		context.setServer(server);

		//设置work dir,war包将解压到该目录，jsp编译后的文件也将放入其中。
		String currentDir = new File(warFile).getParent();
		File workDir = new File(currentDir, "work");
		context.setTempDirectory(workDir);

		server.setHandler(context);
		return server;
	}

}

但是在使用Struts2时，Jetty找不到struts2标签报错，不知道有没有人碰到过。为什么main()方法启动的Jetty不会自动去Jar中

找struts2标签配置文件呢？应该怎样配置Jetty去解决？

以下是Jetty插件默认的配置。存放JSP编译结果的临时目录不再是main()方法启动时的src/main/work，而是target/tmp。