java实现poi 在线预览，excel，word直接在页面显示，附带文件上传，多文件上传

所需poi的jar包： commons-collections4-4.1.jar poi-3.17.jar poi-examples-3.17.jar poi-excelant-3.17.jar poi-ooxml-3.17.jar poi-ooxml-schemas-3.17.jar poi-scratchpad-3.17.jar xmlbeans-2.6.0.jar maven项目，可以直接加pom配置： org.apache.commons commons-collections4 4.1 org.apache.poi poi 3.17 org.apache.poi poi-examples 3.17 org.apache.poi poi-excelant 3.17 org.apache.poi poi-ooxml 3.17 org.apache.poi poi-ooxml-schemas 3.17 org.apache.poi poi-scratchpad 3.17 org.apache.xmlbeans xmlbeans 2.6.0