关于使用POI导出时excel版本问题的bug解决

使用POI文档。实例化对象时代码如下：

Workbook wb = new HSSFWorkbook(new FileInputStream(new File("D:\\tFACTORY.xls")));

但是D盘的excel文件格式是.xlsx格式的，导致出现了如下的错误：

HTTP Status 500 - Request processing failed; nested exception is org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)

type Exception report

message Request processing failed; nested exception is org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:948)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
	org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:131)
	org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:104)
	org.apache.poi.poifs.filesystem.POIFSFileSystem.<init>(POIFSFileSystem.java:138)
	org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:322)
	org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:303)
	org.jk.controller.cargo.contract.OutProductController.print(OutProductController.java:50)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

解决的办法如下：使用正则表达式，判断实例化对象时候进行一个选择

String fileName = "D:\\tFACTORY.xlsx";
if (fileName.matches("^.+\\.(?i)((xls)|(xlsx))$")) {
boolean is03Excel = fileName.matches("^.+\\.(?i)(xls)$");
FileInputStream inputStream = new FileInputStream(fileName);
Workbook wb = is03Excel ? new HSSFWorkbook(inputStream) : new XSSFWorkbook(inputStream);

。。。。。。

}