ApachePOI导出Office文件到HttpServletResponse（网页下载）报错解决

使用Spring提供的一个下载Office文档的接口报错（具体是使用Apache POI生成OfficeExcel和Word文件），直接输出到HttpServletResponse的OutputStream流，如下报错：

org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException: Fail to save: an error occurs while saving the package : The part /docProps/core.xml failed to be saved in the stream with marshaller org.apache.poi.openxml4j.opc.internal.marshallers.ZipPackagePropertiesMarshaller@f598ff7
    at org.apache.poi.openxml4j.opc.ZipPackage.saveImpl(ZipPackage.java:554)
    at org.apache.poi.openxml4j.opc.OPCPackage.save(OPCPackage.java:1505)
    at org.apache.poi.ooxml.POIXMLDocument.write(POIXMLDocument.java:242)

直接生成的Office（World或者Excel），输出到HttpServletResponse的OutputStream流

改成套一个BufferedOutputStream，起到一个缓存的作用，例如：

OutputStream out = response.getOutputStream();
template.writeAndClose(new BufferedOutputStream(out)); // 原来是 template.writeAndClose(out);
out.flush();