Maven项目启动报这个错cannot be cast to javax.servlet.Servlet 报错

Maven项目启动报这个错cannot be cast to javax.servlet.Servlet 报错

错误展示：

严重: Exception starting filter charsetFilter  java.lang.ClassCastException: org.springframework.web.filter.CharacterEncodingFilter 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:132)      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)      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:116)      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)      at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)      at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)      at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)      at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)      at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)      at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)      at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)      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:483)      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)  五月 29, 2015 11:01:46 上午 org.apache.catalina.core.StandardContext filterStart  严重: Exception starting filter springSecurityFilterChain  java.lang.ClassCastException: org.springframework.web.filter.DelegatingFilterProxy 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:132)      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)      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:116)      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)      at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)      at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)      at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)      at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)      at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)      at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)      at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)      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:483)      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) 

解决方案：
pom.xml中添加上这个属性，因为servlet-api跟tomcat版本冲突

<dependency>       <groupId>javax.servlet</groupId>       <artifactId>servlet-api</artifactId>       <version>2.4</version>       <scope>provided</scope>  </dependency>