Java 批量文件壓縮導出並下載到本地示例代碼

主要用的是org.apache.tools.zip.ZipOutputStream 這個zip流，這里以Execl為例子。

思路首先把zip流寫入到http響應輸出流中，再把excel的流寫入zip流中（這裡可以不用生成文件再打包，只需把execl模板讀出寫好數據輸出到zip流中，並為每次的流設置文件名）

例如：在項目webapp下execl文件中存在1.xls，2.xls，3.xls文件

1.Controller

 @RequestMapping(value = "/exportAll",method = RequestMethod.GET) public void exportAll() throws IOException{ try { HttpServletResponse response=this.getResponse(); response.setContentType("application/octet-stream"); String execlName = "報表"; 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

 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);//這裡是把zip流輸出到httpresponse流中for(int i=0;i<3;i++){ wb = POIUtil.getWorkbook(i);//獲取0,1,2.xls文件HSSFSheet sheet = wb.getSheetAt(0); testService.setSheet(sheet,datas);//...處理文件內容操作ZipEntry zipEntry = new ZipEntry(new String("文件名XXX".getBytes(),"utf-8")+".xls"); //自己命名，這裡假設是1,2,3 zipStream.putNextEntry(zipEntry); wb.write(zipStream);//這裡就是循環每次把execl寫入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);   }  }

最後的結果生成一個報表.zip，其中包含3個文件1.xls,2.xls,3.xls

總結

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