java 生成多个excel文件并打成zip包供用户下载

参考文献：http://blog.csdn.net/youyou_yo/article/details/52180937

/** 

     * 批量导出Excel 

     * @return 

     * @throws DBException 

     */  

    @SuppressWarnings("unchecked")  

    public String batchExport() throws DBException{  

          

        @SuppressWarnings("unused")  

        List<String> chkList = this.checkValueToList();//获取复选框的值  

        List<File> srcfile=new ArrayList<File>();  

          

        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHSS");  

        String path = sdf.format(new Date());  

          

        String serverPath = request.getSession().getServletContext().getRealPath("/");  

        //在服务器端创建文件夹  

        File file = new File(serverPath+path);  

        if(!file.exists()){  

            file.mkdir();  

        }  

  

        for (int i = 0; i < chkList.size(); i++ ){  

            String t[] = chkList.get(i).split("\\|");  

            LhjcOrgSelfQuery lhjcunioncheckquery = new LhjcOrgSelfQuery();  

            lhjcunioncheckquery.setChnoticeId(t[0]);  

            lhjcunioncheckquery.setOrgId(t[1]);  

            lhjcunioncheckquery.setSelfChTempId(t[2]);  

            List<Map<String,String>> reportViews=commonService.getObjectPages("ExportLhjcunioncheckresultReportView", lhjcunioncheckquery);  

            String orgName = (String)commonService.get2Object("getUnioncheckOrgName", t[1]);  

            //生成excel的名字  

            String templateName = nyear+"深圳市党政机关信息安全检查结果-"+(orgName==null?"未知单位":orgName);  

              

            /** 表头数组 */  

            String[] headArray = new String[]{"编码","检查项名称","   检查内容   ","考核类型","   检查结果   ","   备注   ","权重","得分"};  

              

            /** 字段名数组 */  

            String[] fieldArray = new String[]{"CHECKITEMCODE","CHITEMNAME","CHCONTENT","REPORTTYPE","QUESTDESC","CHITEMDESC","REPORTWEIGHT","UNIONSCORE"};  

              

            ExportUtils exportUtils = new ExportUtils();  

            exportUtils.setTitle(templateName);  

            exportUtils.setHead(templateName);  

            exportUtils.setHeadArray(headArray);  

            exportUtils.setFieldArray(fieldArray);  

            try {  

                HttpServletResponse response = ServletActionContext.getResponse();  

                  

                SimpleDateFormat sfm = new SimpleDateFormat("yyyy-MM-dd");  

                String filename = templateName + "_" + sfm.format(new Date());  

                  

                String encodedfileName = new String(filename.getBytes(), "GBK");  

                //将生成的多个excel放到服务器的指定的文件夹中  

                FileOutputStream out = new FileOutputStream(serverPath+path+"\\"+encodedfileName+".xls");  

                  

                if(fileType.indexOf(",") != -1){  

                    fileType = StringUtils.substringBefore(fileType, ",");  

                }  

                response.setHeader("Content-Disposition", " filename=\"" + encodedfileName + "." + fileType + "\"");  

                  

                //导出excel  

                if ("xls".equals(fileType) || "xlsx".equals(fileType)) {  

                    exportUtils.exportExcel(reportViews,fileType,out);  

                } else if("doc".equals(fileType) || "docx".equals(fileType)){  

                    exportUtils.exportWord(reportViews, fileType, out);  

                } else if("pdf".equals(fileType)){  

                    exportUtils.exportPdf(reportViews, out);  

                }   

                  

                srcfile.add(new File(serverPath+path+"\\"+encodedfileName+".xls"));  

                  

            } catch (Exception e) {  

                e.printStackTrace();  

            }   

        }  

        //将服务器上存放Excel的文件夹打成zip包  

        File zipfile = new File(serverPath+path+".zip");  

        this.zipFiles(srcfile, zipfile);  

        //弹出下载框供用户下载  

        this.downFile(ServletActionContext.getResponse(),serverPath, path+".zip");  

        return null;  

    }  

  

  

    /** 

     * 将多个Excel打包成zip文件 

     * @param srcfile 

     * @param zipfile 

     */  

    public void zipFiles(List<File> srcfile, File zipfile) {    

        byte[] buf = new byte[1024];    

        try {    

            // Create the ZIP file    

            ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));    

            // Compress the files    

            for (int i = 0; i < srcfile.size(); i++) {    

                File file = srcfile.get(i);    

                FileInputStream in = new FileInputStream(file);    

                // Add ZIP entry to output stream.    

                out.putNextEntry(new ZipEntry(file.getName()));    

                // Transfer bytes from the file to the ZIP file    

                int len;    

                while ((len = in.read(buf)) > 0) {    

                    out.write(buf, 0, len);    

                }    

                // Complete the entry    

                out.closeEntry();    

                in.close();    

            }    

            // Complete the ZIP file    

            out.close();   

        } catch (IOException e) {    

           e.printStackTrace();  

        }    

    }    

  

  

    public void downFile(HttpServletResponse response,String serverPath, String str) {    

        try {    

            String path = serverPath + str;    

            File file = new File(path);    

            if (file.exists()) {    

                InputStream ins = new FileInputStream(path);    

                BufferedInputStream bins = new BufferedInputStream(ins);// 放到缓冲流里面    

                OutputStream outs = response.getOutputStream();// 获取文件输出IO流    

                BufferedOutputStream bouts = new BufferedOutputStream(outs);    

                response.setContentType("application/x-download");// 设置response内容的类型    

                response.setHeader(    

                        "Content-disposition",    

                        "attachment;filename="    

                                + URLEncoder.encode(str, "GBK"));// 设置头部信息    

                int bytesRead = 0;    

                byte[] buffer = new byte[8192];    

                 //开始向网络传输文件流    

                while ((bytesRead = bins.read(buffer, 0, 8192)) != -1) {    

                   bouts.write(buffer, 0, bytesRead);    

               }    

               bouts.flush();// 这里一定要调用flush()方法    

                ins.close();    

                bins.close();    

                outs.close();    

                bouts.close();    

            } else {    

                response.sendRedirect("../error.jsp");    

            }    

        } catch (IOException e) {    

            e.printStackTrace();  

        }    

    }  
页面调用：

<script language="javascript">  

       <!--   

  

//批量导出Excel  

       function batchExport(){  

            var chkbox = $("input[type='checkbox'][name='chk'][checked]");  

            if(chkbox.length == 0){  

                alert('请选择一条或多条记录操作！');  

                return;  

            }  

            $("#exportLoading").html('<img src="${ctx}/images/loading.gif"/>');  

              

            var checkboxvalue = '';  

            chkbox.each(function(){  

                checkboxvalue += $(this).val()+",";  

            });  

              

            var nyear = document.getElementById('nyear').value;  

              

            if(checkboxvalue != null && checkboxvalue.length > 0){  

                  

                checkboxvalue = checkboxvalue.substring(0,checkboxvalue.length-1);  

                $('#checkboxvalue').val(checkboxvalue);  

                  

                var form = document.forms[0];  

                form.action="${ctx}/core/lhjc/lhjccheckjd/batchExport.action?fileType=xls&chvalue="+checkboxvalue+"&nyear="+nyear;  

                form.submit();  

                $("#exportLoading").empty();  

            }  

              

       }  

          

        -->  

        </script>