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6. WEB-INF目录下创建web相关配置
   web.xml：
   <?xml version="1.0" encoding="UTF-8"?>
   <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
   version="3.1">
   <display-name>SpringMVC_CRUD</display-name>
   <servlet>
   <servlet-name>dispatcherServlet</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <init-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>classpath:applicationContext.xml</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
   </servlet>
   <servlet-mapping>
   <servlet-name>dispatcherServlet</servlet-name>
   <url-pattern>/</url-pattern>
   </servlet-mapping>
   <welcome-file-list>
   <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>
   <filter>
   <filter-name>CharacterEncodingFilter</filter-name>
   <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
   <init-param>
   <param-name>encoding</param-name>
   <param-value>utf-8</param-value>
   </init-param>
   <init-param>
   <param-name>forceEncoding</param-name>
   <param-value>true</param-value>
   </init-param>
   </filter>
   <filter-mapping>
   <filter-name>CharacterEncodingFilter</filter-name>
   <url-pattern>/*</url-pattern>
   </filter-mapping>

   <servlet-mapping>
   <servlet-name>default</servlet-name>
   <url-pattern>.jpg</url-pattern>
   </servlet-mapping>
   <servlet-mapping>
   <servlet-name>default</servlet-name>
   <url-pattern>.js</url-pattern>
   </servlet-mapping>
   <servlet-mapping>
   <servlet-name>default</servlet-name>
   <url-pattern>*.css</url-pattern>
   </servlet-mapping>
   </web-app>

7. 拷贝js框架到js目录下
   框架名称：
   echarts.min.js
   jquery-3.2.0.min.js

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