Spring MVC，Excel文件下载，破坏文件

我正在使用我的一个webapps中的excel导出function。 我build立了一个小testing用例，下载工作正常，但xlsx文件已损坏，不知道还有什么可以尝试的。 如果我把excel写入文件，打开没有问题，所以在下载时必须出错。

设置：

spring-mvc 3.2.7 poi 3.10.1 Tomcat 8.0

控制器方法：

@RequestMapping(value = "/download", method = RequestMethod.GET) public ModelAndView downloadExcel() { // create some sample data List<Book> listBooks = new ArrayList<Book>(); listBooks.add(new Book("Effective Java", "Joshua Bloch", "0321356683", "May 28, 2008", 38.11F)); listBooks.add(new Book("Head First Java", "Kathy Sierra & Bert Bates", "0596009208", "February 9, 2005", 30.80F)); listBooks.add(new Book("Java Generics and Collections", "Philip Wadler", "0596527756", "Oct 24, 2006", 29.52F)); listBooks.add(new Book("Thinking in Java", "Bruce Eckel", "0596527756", "February 20, 2006", 43.97F)); listBooks.add(new Book("Spring in Action", "Craig Walls", "1935182358", "June 29, 2011", 31.98F)); // return a view which will be resolved by an excel view resolver return new ModelAndView(new ExcelBuilder(listBooks)); } 

抽象自定义视图：

 public abstract class AbstractPOIExcelView extends AbstractView { private static final String CONTENT_TYPE_XLSX = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; public AbstractPOIExcelView() { } @Override protected boolean generatesDownloadContent() { return true; } @Override protected final void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception { XSSFWorkbook workbook = new XSSFWorkbook(); buildExcelDocument(model, workbook, request, response); ByteArrayOutputStream baos = createTemporaryOutputStream(); response.setHeader("Content-Disposition", "attachment;filename=filename.xlsx"); response.setContentType(CONTENT_TYPE_XLSX); workbook.write(baos); writeToResponse(response, baos); } protected abstract void buildExcelDocument(Map<String, Object> model, XSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response) throws Exception; } 

ExcelBuilder：

 public class ExcelBuilder extends AbstractPOIExcelView { private List<Book> listBooks; public ExcelBuilder(List<Book> books) { this.listBooks = books; } @Override protected void buildExcelDocument(Map<String, Object> model, XSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response) throws Exception { Sheet sheet = workbook.createSheet("Java Books"); sheet.setDefaultColumnWidth(30); Row header = sheet.createRow(0); header.createCell(0).setCellValue("Book Title"); header.createCell(1).setCellValue("Author"); header.createCell(2).setCellValue("ISBN"); header.createCell(3).setCellValue("Published Date"); header.createCell(4).setCellValue("Price"); // create data rows int rowCount = 1; for (Book aBook : listBooks) { Row aRow = sheet.createRow(rowCount++); aRow.createCell(0).setCellValue(aBook.getTitle()); aRow.createCell(1).setCellValue(aBook.getAuthor()); aRow.createCell(2).setCellValue(aBook.getIsbn()); aRow.createCell(3).setCellValue(aBook.getPublishedDate()); aRow.createCell(4).setCellValue(aBook.getPrice()); } } } 

回应标题：

  Cache-Control:private, must-revalidate Content-Disposition:attachment;filename="filename.xlsx" Content-Language:de-DE Content-Length:3778 Content-Type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=ISO-8859-1 Date:Wed, 19 Nov 2014 12:52:05 GMT Expires:Thu, 01 Jan 1970 00:00:00 GMT Pragma:private Set-Cookie:JSESSIONID=07F50FF2B63D4003311DE222782C4E89; Path=/abc/; HttpOnly X-Content-Type-Options:nosniff X-Frame-Options:DENY X-XSS-Protection:1; mode=block 

它使我困惑，字符集将被设置，当这是二进制数据。 这可能是问题吗？

Answer 1

不要返回ModelAndView，而只需将excel文件写入响应的outputStream

 @RequestMapping(value = "/download", method = RequestMethod.GET) @ResponseBody public Object downloadExcel(HttpServletResponse response) { response.setContentType("application/vnd.ms-excel"); response.setHeader("Content-disposition", "attachment; filename=" + theFileNameString + ".xls"); try { generateExcel(response.getOutputStream()); } catch (IOException e) { System.out.println("ERROR: " + e); } return null; } 

检查所有stream刷新/closures

Answer 2

我build议使用现有的解决scheme，而不是尝试自己处理响应stream。

我将使用AbstractExcelView而不是您的AbstractPOIExcelView来完成这项工作。 查看本教程使用AbstractExcelView获取灵感。

对于Spring 4.2或更新的版本，使用AbstractXlsView （或AbstractXlsxView ），因为不赞成使用原始的AbstractExcelView 。