搭建Eclipse+Maven+Scala-IDE的Scala Web开发环境
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>[email protected]</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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