Java 是一门比较优秀的编程语言， 其最大功劳是建立非常繁荣的JVM平台生态。不过 Java 语法比较麻烦，写过 C, Python 的人总是想使用简洁的语法，又希望利用上 Java 平台的强大，因此，催生了 Groovy , Scala 这样的 JVM 语言。那么为什么选择 Scala 呢？ 因为 Scala 是一门富有想象力的语言！
本文尝试在 Javaweb 中使用 Scala , 使用 Scala 编写一个 Servlet ，项目见 http://www.cnblogs.com/lovesqcc/p/4037708.html 。值得注意的是， Intellj 提供了将 Java 转化为 Scala 的功能！ 不信，你可以将 Java 代码直接复制到 Scala 文件中。
在 Javaweb 项目中使用 Scala ， 需要添加如下依赖和插件：
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.10.1</version>
</dependency>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.8.1</version>
<configuration>
<includes>
<include>**/*.java</include>
<include>**/*.scala</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<version>2.15.2</version>
<executions>
<execution>
<id>scala-compile-first</id>
<phase>process-resources</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>scala-test-compile</id>
<phase>process-test-resources</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
Scala Servlet:
package servlets import java.io.IOException
import javax.servlet.ServletException
import javax.servlet.http.{HttpServletResponse, HttpServletRequest, HttpServlet} import autocomplete.{SimpleWordMatcher, PrefixMatcher}
import scala.collection.JavaConversions._ /**
* Created by lovesqcc on 16-3-19.
*/
class AutoCompleteServletUsingScala extends HttpServlet { protected var wordMatcher: PrefixMatcher = new SimpleWordMatcher @throws(classOf[ServletException])
@throws(classOf[IOException])
override def doGet(req: HttpServletRequest, resp: HttpServletResponse) {
doPost(req, resp)
} @throws(classOf[ServletException])
@throws(classOf[IOException])
override def doPost(req: HttpServletRequest, resp: HttpServletResponse) {
resp.setContentType("text/plain;charset=UTF8")
val inputText: String = req.getParameter("inputText")
val matchers = wordMatcher.obtainMatchedWords(inputText) var content = ""
matchers.foreach {
word => content += word + " "
} resp.getWriter print content } }