POI 3.8版本导出excel问题

使用poi 3.8版本导出excel时，在本地和测试环境都是好使的，但是部署到线上环境（linux＋tomcat）后直接报错，报错日志如下图：

java.lang.RuntimeException: java.io.IOException: No such file or directory

at org.apache.poi.xssf.streaming.SXSSFWorkbook.createAndRegisterSXSSFSheet(SXSSFWorkbook.java:569)

at org.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:558)

at com.app.util.ExcelIOUtil.write(ExcelIOUtil.java:46)

at com.app.controllers.DrivingSchoolController.download(DrivingSchoolController.java:106)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at com.mvc.invoke.ActionInvoker.invoke(ActionInvoker.java:75)

at com.mvc.MvcDispatcher.service(MvcDispatcher.java:119)

at com.mvc.MvcFilter.doFilter(MvcFilter.java:67)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)

at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:1810)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:662)

原因是：

poi3.8默认情况下，用到的临时目录是系统自带的临时目录。

代码如下

/**

* Write out this workbook to an Outputstream.

*

* @param stream - the java OutputStream you wish to write to

* @exception IOException if anything can‘t be written.

*/

public void write(OutputStream
stream) throws IOException

{

for (SXSSFSheet
sheet : _xFromSxHash.values())

{

sheet.flushRows();

}

//Save the template

File tmplFile = File.createTempFile("poi-sxssf-template",
".xlsx");

tmplFile.deleteOnExit();

FileOutputStream os =
new FileOutputStream(tmplFile);

_wb.write(os);

os.close();

//Substitute the template entries with the generated sheet data files

injectData(tmplFile,
stream);

tmplFile.delete();

}

解决办法：

查看tomcat目录下temp目录是否还存在，如果没有，新建一个即可。

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