我试图通过Tomcat运行Java Spark Web服务＆gt;我正在使用Maven。 maven应用程序编译，但是当我执行mvn tomcat:run时，我得到以下内容：
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building art2 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> tomcat-maven-plugin:1.1:run (default-cli) @ art2 >>>
[INFO]
[INFO] --- maven-resources-plugin:2.3:resources (default-resources) @ art2 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /home/pierceg/SR_Repos/ART2/art2_java/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ art2 ---
[INFO] No sources to compile
[INFO]
[INFO] <<< tomcat-maven-plugin:1.1:run (default-cli) @ art2 <<<
[INFO]
[INFO] --- tomcat-maven-plugin:1.1:run (default-cli) @ art2 ---
[INFO] Running war on http://localhost:8080/art2
[INFO] Using existing Tomcat server configuration at /home/pierceg/SR_Repos/ART2/art2_java/target/tomcat
Aug 05, 2015 2:26:14 PM org.apache.catalina.startup.Embedded start
INFO: Starting tomcat server
Aug 05, 2015 2:26:14 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.29
Aug 05, 2015 2:26:14 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter SparkFilter
java.lang.ClassCastException: spark.servlet.SparkFilter cannot be cast to javax.servlet.Filter
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4001)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.startup.Embedded.start(Embedded.java:825)
at org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:558)
at org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:255)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Aug 05, 2015 2:26:14 PM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
Aug 05, 2015 2:26:14 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/art2] startup failed due to previous errors
我的web.xml看起来像：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
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_3_0.xsd">
<display-name>ART2</display-name>
<filter>
<filter-name>SparkFilter</filter-name>
<filter-class>spark.servlet.SparkFilter</filter-class>
<init-param>
<param-name>applicationClass</param-name>
<param-value>com.simplerelevance.Main</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>SparkFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
我查看了问题here，但我的WEB-INF文件夹中没有lib文件夹。这个错误信息是什么意思？我是Tomcat和Spark的新手，但我读过的内容告诉我，我正在尝试使用多个servlet.Filter类，但我不知道我在做什么
答案 0 :(得分：0)
当你在pom.xml中包含对spark-core的依赖时，你需要排除jetty：
<dependencies>
<dependency>
<groupId>com.sparkjava</groupId>
<artifactId>spark-core</artifactId>
<version>2.1</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
</exclusion>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-webapp</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
答案 1 :(得分：0)
我有一个类似的问题并通过从我的spark-core文件中的pom.xml依赖项中排除Javax Servlet来解决它，如下所示：
<dependency>
<groupId>com.sparkjava</groupId>
<artifactId>spark-core</artifactId>
<version>2.5.5</version>
<exclusions>
<exclusion>
<artifactId>javax.servlet-api</artifactId>
<groupId>javax.servlet</groupId>
</exclusion>
</exclusions>
</dependency>