问题：

springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: org/apache/poi/POIXMLTypeLoaderat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1082)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)at javax.servlet.http.HttpServlet.service(HttpServlet.java:655)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

1。我这里使用POI版本为4.2.1

	    <dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.2.1</version></dependency>

我使用的poi-tl版本为1.8.2 此版本要求POI 4.2.1+ ，JDK1.8+

        <dependency><groupId>com.deepoove</groupId><artifactId>poi-tl</artifactId><version>1.8.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-scratchpad</artifactId><version>3.17</version></dependency>

最重要的一步来了

== 你的ooxml-schemas的版本可能为1.3，但是要求得大于1.3，咱就使用最新版本的1.4==

       <dependency><groupId>org.apache.poi</groupId><artifactId>ooxml-schemas</artifactId><version>1.4</version></dependency>```然后就可以解决了