web.xml
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
tomcat啟動報錯
嚴重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
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.StandardContext.listenerStart(StandardContext.java:4909)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5492)
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:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
原因：由於是maven創建的項目，相關的jar包沒有引進來
解決：properties->Deployment Assemply->Add 把maven下的jar包引進來

在瀏覽器裏面輸入這個http://localhost:8080/spms-web/
五月 17, 2018 11:51:57 下午 org.springframework.web.servlet.DispatcherServlet noHandlerFound
警告: No mapping found for HTTP request with URI [/spms-web/] in DispatcherServlet with name ‘SpringDispatcher‘
<servlet-mapping>
<servlet-name>SpringDispatcher</servlet-name>
<url-pattern>/*</url-pattern> //*號去掉
</servlet-mapping>

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>spms-web</groupId>
  <artifactId>spms-web</artifactId>
  <version>0.0
 
.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>spms-web</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>3.2
 
.0.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>3.2.0.RELEASE</version>
    </dependency>
    <dependency>
       <groupId>org.springframework.security</groupId>
       <artifactId>spring-security-core</artifactId>
       <version>3.1.3.RELEASE</version>
    </dependency>
    <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>javax.servlet-api</artifactId>
     <version>3.0.1</version>
     </dependency>
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-webmvc</artifactId>
       <version>3.2.0.RELEASE</version>
    </dependency>
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jdbc</artifactId>  
        <version>3.0.5.RELEASE</version>  
    </dependency>
    <dependency>            
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.38</version>    
   </dependency>
       <dependency>  
        <groupId>commons-dbcp</groupId>  
        <artifactId>commons-dbcp</artifactId>  
        <version>1.4</version>  
    </dependency>  
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

<?xml version="1.0" encoding="UTF-8"?>    
<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"    
    version="3.0">    
        
    <welcome-file-list>    
        <welcome-file>/index.jsp</welcome-file>    
    </welcome-file-list>  
    <!-- 加載spring bean  -->   
    <context-param>    
         <param-name>contextConfigLocation</param-name>    
        <param-value>classpath:spring.xml</param-value>    
    </context-param> 
    <listener>    
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    
    </listener>        
    <!-- 編碼過濾器 -->    
    <filter>    
        <filter-name>encodingFilter</filter-name>    
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>    
        <!-- 支持異步請求 -->  
        <async-supported>true</async-supported>    
        <init-param>    
            <param-name>encoding</param-name>    
            <!-- 為了支持emoji表情可能需要更高級的編碼 -->  
            <param-value>UTF-8</param-value>    
        </init-param>    
    </filter>    
    <filter-mapping>    
        <filter-name>encodingFilter</filter-name>    
        <url-pattern>/*</url-pattern>    
    </filter-mapping>     
    <!-- Spring MVC servlet -->
    <servlet>
        <servlet-name>SpringDispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:dispatcher.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringDispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping> 
        
</web-app>  

web.xml配置遇到的問題