主要用的是org.apache.tools.zip.ZipOutputStream 这个zip流，这里以Execl为例子。
思路首先把zip流写入到http响应输出流中，再把excel的流写入zip流中（这里可以不用生成文件再打包，只需把execl模板读出写好数据输出到zip流中，并为每次的流设置文件名）
例如：在项目webapp下execl文件中 存在1.xls，2.xls，3.xls文件
1.Controller
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@RequestMapping(value = "/exportAll",method = RequestMethod.GET) public void exportAll() throws IOException{ try { HttpServletResponse response=this.getResponse(); response.setContentType("application/octet-stream"); String execlName = "报表"; response.addHeader("Content-Disposition", "attachment;filename="+new String(execlName.getBytes(),"iso-8859-1") +".zip"); OutputStream out = response.getOutputStream(); testService.exportAll(out); } catch (Exception e) { .... } } |
2.Service
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import java.io.OutputStream;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipOutputStream;import java.io.File;import java.io.FileInputStream;import javax.servlet.http.HttpServletRequest;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.poifs.filesystem.POIFSFileSystem;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes; public boolean exportAll(OutputStream out){ ZipOutputStream zipStream = null; HSSFWorkbook wb = null; try{ List<Test> datas = testService.getTestData(); zipStream = new ZipOutputStream(out);//这里是把zip流输出到httpresponse流中 for(int i=0;i<3;i++){ wb = POIUtil.getWorkbook(i);//获取0,1,2.xls文件 HSSFSheet sheet = wb.getSheetAt(0); testService.setSheet(sheet,datas);//...处理文件内容操作 ZipEntry zipEntry = new ZipEntry(new String("文件名XXX".getBytes(),"utf-8")+".xls"); //自己命名，这里假设是1,2,3 zipStream.putNextEntry(zipEntry); wb.write(zipStream);//这里就是循环每次把execl写入zip包中 zipStream.flush(); } }catch (Exception e) { throw new SysException(ERRORConstants.COMMON_SYSTEM_ERROR, e); }finally { try { if(wb!=null){ wb.close(); } if(zipStream!=null){ zipStream.close(); } out.flush(); out.close(); } catch (IOException e) { throw new SysException(ERRORConstants.COMMON_CLOSE_ERROR, e); } } } public static HSSFWorkbook getWorkbook(String bh){ try { String line = File.separator; ServletRequestAttributes aRequestAttributes=(ServletRequestAttributes)RequestContextHolder.getRequestAttributes(); HttpServletRequest request =aRequestAttributes==null?null:aRequestAttributes.getRequest(); String webpath=request.getServletContext().getRealPath("/"); File file = new File(webpath+line+"excel"+line+bh+".xls"); POIFSFileSystem poifsFileSystem = new POIFSFileSystem(new FileInputStream(file)); HSSFWorkbook wb = new HSSFWorkbook(poifsFileSystem); return wb; } catch (Exception e) { throw new SysException(ERRORConstants.COMMON_SYSTEM_ERROR,e); } } |
最后的结果生成一个报表.zip，其中包含3个文件1.xls,2.xls,3.xls
总结
以上所述是小编给大家介绍的Java 批量文件压缩导出并下载到本地示例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：https://www.cnblogs.com/zwdx/archive/2017/12/26/8118379.html
