搭建eclipse+maven+scala-ide的scala web开发环境

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http://www.tuicool.com/articles/NBzAzy

江湖传闻，scala开发的最佳利器乃 JetBrains 的神作 IntelliJ IDEA ，外加构建工具sbt 是也。

但因历史原因，项目组成员对 Eclipse + Maven 组合更为熟悉，为了快速实现项目原型，不增加不确定因素带来的风险，搭建一套 Eclipse + Maven + Scala-IDE 的开发环境。

基本原则是，必须完全满足但不限于以下几点内容：

方便重构，方便调试，支持热部署。
可直接使用已有maven的本地和私服仓库。
可以无束缚的只用自己熟悉的语言编写代码。
可以快速混合编译scala+java代码，包括交叉引用的文件。

如果你有洁癖，可以自己下载 Eclipse ，然后安装各种插件。但是可能会遇到插件依赖包版本冲突之类的问题，为了速度，我直接下载官方打包好的 Scala-IDE ，有各种平台可供选择。

使用 Git 管理项目源代码，需要安装 EGit 插件，Eclipse插件更新地址 EGit Updates 。

假设项目名称为 feeling ，使用 JDK 1.7，Servlet 3.0，最终目录结构如下。

.├── .settings                    #eclipse工程目录├── .classpath                   #eclipse classpath文件├── .project                     #eclipse project文件├── src                          #源代码|   ├── main                     #源代码主目录|   |   ├── java                 #java代码|   |   ├── scala                #scala代码|   |   ├── resources            #资源文件|   |   └── webapp               #web主目录|   |       ├── WEB-INF          #WEB-INF目录|   |       |   └── web.xml      #web.xml文件|   |       └── index.jsp        #主页面|   └── test                     #测试代码|       ├── java                 #java测试代码|       ├── scala                #scala测试代码|       └── resources            #测试资源文件├── .gitignore                   #git忽略配置├── target                       #编译输出目录├── README.md                    #markdown格式的说明文件└── pom.xml                      #maven的pom文件

pom.xml文件

<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/maven-v4_0_0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>feeling</groupId>  <artifactId>feeling</artifactId>  <version>0.0.1</version>  <packaging>war</packaging>  <!-- <name>${project.artifactId}</name> -->  <name>feeling</name>  <description>our wonderfully feeling application</description>  <url>http://feeling.com</url>  <inceptionYear>2014</inceptionYear>  <organization>    <name>feeling</name>    <url>http://feeling.com</url>  </organization>  <licenses>    <license>      <name>The Apache Software License, Version 2.0</name>      <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>      <distribution>repo</distribution>    </license>  </licenses>  <developers>    <developer>      <id>bruce</id>      <name>bruce sha</name>      <url>http://bruce-sha.github.io</url>      <email>bu.ru@qq.com</email>    </developer>  </developers>  <scm>  <connection>http://17.20.13.23/scm/git/feeling</connection>  <developerConnection>http://17.20.13.23/scm/git/feeling</developerConnection>  <url>http://17.20.13.23</url>  </scm>  <properties>    <scala.version>2.10.3</scala.version>    <maven.compiler.source>1.7</maven.compiler.source>    <maven.compiler.target>1.7</maven.compiler.target>    <encoding>UTF-8</encoding>  </properties>  <!-- 个性化开发 -->  <profiles>    <profile>      <id>dev</id>      <activation>        <activeByDefault>true</activeByDefault>      </activation>      <properties>        <build.param>this is dev</build.param>      </properties>    </profile>    <profile>      <id>release</id>      <activation>        <activeByDefault>false</activeByDefault>      </activation>      <properties>        <build.param>this is relase</build.param>      </properties>    </profile>  </profiles>  <dependencies>    <!-- google -->    <dependency>      <groupId>com.google.guava</groupId>      <artifactId>guava</artifactId>      <version>15.0</version>    </dependency>    <dependency>      <groupId>com.google.inject</groupId>      <artifactId>guice</artifactId>      <version>3.0</version>    </dependency>    <!-- servlet -->    <dependency>      <groupId>javax.servlet</groupId>      <artifactId>javax.servlet-api</artifactId>      <!-- <version>2.5</version> -->      <version>3.0.1</version>      <scope>provided</scope>    </dependency>    <!-- <dependency> -->    <!-- <groupId>javax.servlet</groupId> -->    <!-- <artifactId>jsp-api</artifactId> -->    <!-- <version>2.0</version> -->    <!-- <scope>provided</scope> -->    <!-- </dependency> -->    <!-- scala -->    <dependency>      <groupId>org.scala-lang</groupId>      <artifactId>scala-library</artifactId>      <version>${scala.version}</version>    </dependency>    <!-- test -->    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>4.11</version>      <scope>test</scope>    </dependency>    <!-- 其他包不再一一描述 -->        <!-- log -->    <!-- json -->    <!-- mongodb -->    <!-- quartz -->  </dependencies>  <build>    <finalName>feeling</finalName>    <!-- 必须要，资源文件中占位符被profile替换的关键配置 -->    <resources>      <resource>        <directory>src/main/resources</directory>        <includes>          <include>*.*</include>        </includes>        <filtering>true</filtering>      </resource>    </resources>    <!-- 必须干掉，否则不编译src/main/java下的代码 -->    <!-- <sourceDirectory>src/main/scala</sourceDirectory> -->    <!-- <testSourceDirectory>src/test/scala</testSourceDirectory> -->    <plugins>      <plugin>        <!-- see http://davidb.github.com/scala-maven-plugin -->        <groupId>net.alchim31.maven</groupId>        <artifactId>scala-maven-plugin</artifactId>        <version>3.1.6</version>        <!-- 必须要，否则不能混合编译交叉引用文件 -->        <executions>          <execution>            <id>scala-compile-first</id>            <phase>process-resources</phase>            <goals>              <goal>add-source</goal>              <goal>compile</goal>            </goals>          </execution>          <execution>            <id>scala-test-compile</id>            <phase>process-test-resources</phase>            <goals>              <goal>testCompile</goal>            </goals>          </execution>        </executions>      </plugin>      <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-surefire-plugin</artifactId>        <version>2.13</version>        <configuration>          <useFile>false</useFile>          <disableXmlReport>true</disableXmlReport>          <!-- If you have classpath issue like NoDefClassError,... -->          <!-- useManifestOnlyJar>false</useManifestOnlyJar -->          <includes>            <include>**/*Test.*</include>            <include>**/*Suite.*</include>          </includes>        </configuration>      </plugin>      <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-war-plugin</artifactId>        <version>2.4</version>        <configuration>          <!-- 移除web.xml的依赖，Servlet 3.0可以不要web.xml文件 -->          <failOnMissingWebXml>false</failOnMissingWebXml>        </configuration>      </plugin>      <!-- jetty6，不支持servlet3 -->      <!-- <plugin> -->      <!-- <groupId>org.mortbay.jetty</groupId> -->      <!-- <artifactId>maven-jetty-plugin</artifactId> -->      <!-- <version>6.1.26</version> -->      <!-- <configuration> -->      <!-- <scanIntervalSeconds>10</scanIntervalSeconds> -->      <!-- <stopKey>foo</stopKey> -->      <!-- <stopPort>9999</stopPort> -->      <!-- </configuration> -->      <!-- <executions> -->      <!-- <execution> -->      <!-- <id>start-jetty</id> -->      <!-- <phase>pre-integration-test</phase> -->      <!-- <goals> -->      <!-- <goal>run</goal> -->      <!-- </goals> -->      <!-- <configuration> -->      <!-- <scanIntervalSeconds>0</scanIntervalSeconds> -->      <!-- <daemon>true</daemon> -->      <!-- </configuration> -->      <!-- </execution> -->      <!-- <execution> -->      <!-- <id>stop-jetty</id> -->      <!-- <phase>post-integration-test</phase> -->      <!-- <goals> -->      <!-- <goal>stop</goal> -->      <!-- </goals> -->      <!-- </execution> -->      <!-- </executions> -->      <!-- </plugin> -->      <!-- tomcat7:run 注意tomcat:run跑的是6，不支持servlet3 -->      <plugin>        <!-- http://tomcat.apache.org/maven-plugin-2.0/tomcat7-maven-plugin -->        <groupId>org.apache.tomcat.maven</groupId>        <artifactId>tomcat7-maven-plugin</artifactId>        <version>2.2</version>        <configuration>          <path>/</path>          <port>80</port>        </configuration>      </plugin>      <!-- jetty:run -->      <plugin>        <!-- http://wiki.eclipse.org/Jetty/Feature/Jetty_Maven_Plugin -->        <groupId>org.mortbay.jetty</groupId>        <!-- <artifactId>maven-jetty-plugin</artifactId> 这是jetty6 不支持servlet3 -->        <artifactId>jetty-maven-plugin</artifactId>        <version>8.1.13.v20130916</version>        <configuration>          <stopPort>9966</stopPort>          <stopKey>foo</stopKey>          <scanIntervalSeconds>0</scanIntervalSeconds>          <connectors>            <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">              <port>80</port>              <maxIdleTime>60000</maxIdleTime>            </connector>          </connectors>          <webAppConfig>            <contextPath>/</contextPath>          </webAppConfig>        </configuration>      </plugin>    </plugins>  </build></project>

web.xml

<?xml version="1.0" encoding="UTF-8"?><!-- <web-app --><!-- xmlns="http://java.sun.com/xml/ns/javaee" --><!-- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" --><!-- xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" --><!-- version="2.5" --><!-- > --><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_3_0.xsd"  id="WebApp_ID" version="3.0">  <display-name>feeling</display-name>  <!--   <servlet> -->  <!--   <servlet-name>feeling</servlet-name> -->  <!--   <servlet-class>feelings.service.FeelingService</servlet-class> -->  <!--   </servlet> -->  <!--   <servlet-mapping> -->  <!--   <servlet-name>feeling</servlet-name> -->  <!--   <url-pattern>/feeling</url-pattern> -->  <!--   </servlet-mapping> -->    <welcome-file-list>    <welcome-file>index.html</welcome-file>    <welcome-file>index.htm</welcome-file>    <welcome-file>index.jsp</welcome-file>    <welcome-file>default.html</welcome-file>    <welcome-file>default.htm</welcome-file>    <welcome-file>default.jsp</welcome-file>  </welcome-file-list>  </web-app>

.project文件：

<?xml version="1.0" encoding="UTF-8"?><projectDescription>  <name>feeling</name>  <comment></comment>  <projects>  </projects>  <buildSpec>    <buildCommand>      <name>org.scala-ide.sdt.core.scalabuilder</name>      <arguments>      </arguments>    </buildCommand>    <buildCommand>      <name>org.eclipse.m2e.core.maven2Builder</name>      <arguments>      </arguments>    </buildCommand>  </buildSpec>  <natures>    <nature>org.scala-ide.sdt.core.scalanature</nature>    <nature>org.eclipse.jdt.core.javanature</nature>    <nature>org.eclipse.m2e.core.maven2Nature</nature>  </natures></projectDescription>

.classpath文件：

<?xml version="1.0" encoding="UTF-8"?><classpath>  <classpathentry kind="src" output="target/classes" path="src/main/java">    <attributes>      <attribute name="optional" value="true"/>      <attribute name="maven.pomderived" value="true"/>    </attributes>  </classpathentry>  <classpathentry kind="src" output="target/classes" path="src/main/scala">    <attributes>      <attribute name="optional" value="true"/>      <attribute name="maven.pomderived" value="true"/>    </attributes>  </classpathentry>  <classpathentry including="**/*.java" kind="src" path="src/main/resources"/>  <classpathentry kind="src" output="target/test-classes" path="src/test/java">    <attributes>      <attribute name="optional" value="true"/>      <attribute name="maven.pomderived" value="true"/>    </attributes>  </classpathentry>  <classpathentry kind="src" output="target/test-classes" path="src/test/scala">    <attributes>      <attribute name="optional" value="true"/>      <attribute name="maven.pomderived" value="true"/>    </attributes>  </classpathentry>  <classpathentry including="**/*.java" kind="src" path="src/test/resources"/>  <classpathentry kind="con" path="org.scala-ide.sdt.launching.SCALA_CONTAINER"/>  <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7">    <attributes>      <attribute name="maven.pomderived" value="true"/>    </attributes>  </classpathentry>  <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">    <attributes>      <attribute name="maven.pomderived" value="true"/>    </attributes>  </classpathentry>  <classpathentry kind="output" path="target/classes"/></classpath>

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