報錯如下：

資訊: Starting Servlet Engine: Apache Tomcat/7.0.57
九月 24, 2018 6:44:04 下午 org.apache.catalina.util.SessionIdGenerator createSecureRandom
資訊: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [524] milliseconds.
九月 24, 2018 6:44:06 下午 org.apache.catalina.core.StandardContext filterStart
嚴重: Exception starting filter encodingFilter
java.lang.ClassNotFoundException: org.springframework.web.filter.CharacterEncodingFilter
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:506)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:488)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:115)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4830)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5510)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:748)
 

解決方法：

1、選中專案，右鍵Properties-->Deployment Assembly-->選擇Add->選中Java Build Path Entries->Next->選擇Maven Dependencies->Finish->Apply->OK

2.問題已經解決，重新啟動Tomcat伺服器。