java后台批量下载文件并压缩成zip下载的方法

function doQueryPic() {
 var picsDate = $("#picsDate").val();
 var piceDate = $("#piceDate").val();
 var picInst = $("#pic_inst").combotree("getValue");
 var svrCode = $("#pic_svr_code").val();
 var picsTime = $("#pic_stime").val();
 var piceTime = $("#pic_etime").val();
 if (svrCode == null) {
 $.messager.alert('提示', "请输入交易查询代号");
 return;
 }else{
 $.ajax({
 type: "POST",
 url: 'queryPic.translog.action',
 data: {f_brno:picInst,f_sdate:picsDate,f_edate:piceDate,f_svr_code:svrCode,f_stime:picsTime,f_etime:piceTime},
 success: function(rcdata){
 if(rcdata.success){
 var rows = rcdata.picInfo;
 var detailHtml = "<table class='my-form-table' cellpadding='0' cellspacing='0' width='90%' align='center'><thead><tr><th style='width: 5%;text-align: center'><input type='checkbox' onclick='swapCheck()' />全选</th><th style='width: 10%;text-align: center'>日期</th><th style='width: 10%;text-align: center'>有无影像</th><th style='width: 23%;text-align: center'>交易名称</th><th style='width: 10%;text-align: center'>交易状态</th><th style='width: 12%;text-align: center'>设备编号</th><th style='width: 10%;text-align: center'>交易代号</th><th style='width: 10%;text-align: center'>所属机构</th><th style='width: 10%;text-align: center'>交易时间</th></tr></thead><tbody>";
  for(var i = 0;i < rows.length;i++){
 detailHtml = detailHtml + "<tr><td align='center'><input type='checkbox' name='pictureID' value='"+ rows[i].F_DATE + rows[i].F_ICS_BATCH +"' /></td><td>" + rows[i].F_DATE + "</td><td>" + rows[i].ISHASIMG + "</td><td>" + rows[i].F_TX_NAME + "</td><td>" + rows[i].F_STUS + "</td><td>" + rows[i].F_DEV_ID + "</td><td>" + rows[i].F_SVR_CODE + "</td><td>" + rows[i].F_BRNO + "</td><td>" + rows[i].F_TIME + "</td></tr>"; 
 }
  detailHtml = detailHtml + "</tbody></table>";
 document.getElementById("details").innerHTML = detailHtml;
  
 }else{
 $.messager.alert('提示',rcdata.errmsg);
 }
 
 },
 error:function(){
 alert("查询失败!");
 }
 });
 }
 
}

//checkbox 全选/取消全选
var isCheckAll = false;
function swapCheck() {
 if (isCheckAll) {
 $("input[type='checkbox']").each(function() {
 this.checked = false;
 });
 isCheckAll = false;
 } else {
 $("input[type='checkbox']").each(function() {
 this.checked = true;
 });
 isCheckAll = true;
 }
}

function downLoadPic() {
 var arr = new Array(); 
 var picIDs = document.getElementsByName("pictureID"); 
 for (i = 0; i < picIDs.length; i++) {  
 if (picIDs[i].checked) {  
 arr.push(picIDs[i].value);  
 } 
 }
 
 if (arr.length <= 0 ) {
 $.messager.alert('提示', "无下载内容！");
 return;
 }else{
 $('#formPic').attr('action','downLoadPic.translog.action');
 $("#formPic").form('submit',{
 onSubmit:function(){
 
 },
 success:function(data){
 $.messager.alert('提示','图片下载成功','info');
 }
 });

 /**
 *$.ajax({
 type: "POST",
 url: 'downLoadPic.translog.action',
 data: {pictureList:JSON.stringify(arr)},
 success: function(rcdata){
 if(rcdata.success){
 $.messager.show({
 title : '成功',
 msg : rcdata.errmsg
 }); 
 }else{
 $.messager.alert('提示',rcdata.errmsg);
 }
 
 },
 error:function(){
 alert("查询失败!");
 }
 }); */
 }
 
}

/**
 * 图片批量下载
 * @param request
 * @param response
 * @return
 * @throws IOException 
 */
 public void downLoadPic(HttpServletRequest request,HttpServletResponse response) throws IOException{
 //Map<String, Object> params = getParameters(request);
 String[] pictureIDs = request.getParameterValues("pictureID");
 Authentication au=getAuthentication(request);
 service.downLoadPic(pictureIDs, au, request, response);
 return ;
 }

public void downLoadPic(String[] params,Authentication au,HttpServletRequest request,HttpServletResponse response) throws IOException {
 
 //压缩文件初始设置
 String path=System.getProperty("ics.webapp.root");//这个是服务器路径地址，request.getSession().getServletContext().getRealPath() 也一样能
 String fileZip = au.getUsername()+"-"+au.getAttribute("F_BRNO")+ "Pictures.zip";
 String filePath = path+"\" + fileZip;//之后用来生成zip文件
 
 //filePathArr为根据前台传过来的信息，通过数据库查询所得出的pdf文件路径集合（具体到后缀）
 List<Map<String, Object>> fileNameArr = new ArrayList<Map<String,Object>>();
 //JSONArray jsons = JSONArray.fromObject(params.get("pictureList"));
 /**
 *List<String> pictureIDs = new ArrayList<String>();
 for(Object obj:jsons){
 pictureIDs.add(obj.toString());
 }
 */
 for (int i = 0; i < params.length; i++) {
 Map<String, Object> speMap = new HashMap<String, Object>();
 speMap.put("f_date", params[i].substring(0, 8));
 speMap.put("f_ics_batch", params[i].substring(8));
 List<Map<String, Object>> reclists=dao.queryLogInfo(speMap);
 for (int j = 0; j < reclists.size(); j++) {
 fileNameArr.add(reclists.get(j));
 }
 }
 
 //需要压缩的文件--包括文件地址和文件名
 //String[] pathtytytyt ={"D:\13.jpg","D:\1212.jpg"};
 // 要生成的压缩文件地址和文件名称
 //String desPath = "D:\DOWNLOADS\new.zip";
 File zipFile = new File(filePath);
 ZipOutputStream zipStream = null;
 FileInputStream zipSource = null;
 BufferedInputStream bufferStream = null;
 try {
 //构造最终压缩包的输出流
 zipStream = new ZipOutputStream(new FileOutputStream(zipFile));
 for(int i =0;i<fileNameArr.size();i++){
 File file = new File((String) fileNameArr.get(i).get("F_FILENAME"));
 //File file = new File(pathtytytyt[i]);
 //将需要压缩的文件格式化为输入流
 zipSource = new FileInputStream(file);
 //压缩条目不是具体独立的文件，而是压缩包文件列表中的列表项，称为条目，就像索引一样
 //这里的name就是文件名，文件名和之前的重复就会导致文件被覆盖，在这用i加文件名进行单一文件识别
 ZipEntry zipEntry = new ZipEntry(i+file.getName());
 //定位该压缩条目位置，开始写入文件到压缩包中
 zipStream.putNextEntry(zipEntry);
 //输入缓冲流
 bufferStream = new BufferedInputStream(zipSource, 1024 * 10);
 int read = 0;
 //创建读写缓冲区
 byte[] buf = new byte[1024 * 10];
 while((read = bufferStream.read(buf, 0, 1024 * 10)) != -1)
 {
 zipStream.write(buf, 0, read);
 }
 }
 
 } catch (Exception e) {
 e.printStackTrace();
 } finally {
 //关闭流
 try {
  if(null != bufferStream) bufferStream.close();
  if(null != zipStream) zipStream.close();
  if(null != zipSource) zipSource.close();
 } catch (IOException e) {
  e.printStackTrace();
 }
 }
 
 /**
 * 写流文件到前端浏览器
 ServletOutputStream os = response.getOutputStream();
 response.setContentType("application/x-octet-stream");
 response.setContentLength((int) zipFile.length());
 response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileZip, "UTF-8"));
 BufferedInputStream bis = null;
 BufferedOutputStream bos = null;
 try {
 bis = new BufferedInputStream(new FileInputStream(filePath));
 bos = new BufferedOutputStream(os);
 byte[] buff = new byte[2048];
 int bytesRead;
 while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
 bos.write(buff, 0, bytesRead);
 }
 os.flush();
 os.close();
 } catch (IOException e) {
 throw e;
 } finally {
 if (bis != null)
 bis.close();
 if (bos != null)
 bos.close();
 File obj = new File(filePath);
 if (obj.exists()) {
 obj.delete();//删除服务器本地产生的临时压缩文件
 }
 }*/
 
 
 //进行浏览器下载 
 //获得浏览器代理信息
 final String userAgent = request.getHeader("USER-AGENT");
 //判断浏览器代理并分别设置响应给浏览器的编码格式
 String finalFileName = null;
 if(StringUtils.contains(userAgent, "MSIE")||StringUtils.contains(userAgent,"Trident")){//IE浏览器
 finalFileName = URLEncoder.encode(fileZip,"UTF-8");
 System.out.println("IE浏览器");
 }else if(StringUtils.contains(userAgent, "Mozilla")){//google,火狐浏览器
 finalFileName = URLEncoder.encode(fileZip,"UTF-8");
 }else{
 finalFileName = URLEncoder.encode(fileZip,"UTF-8");//其他浏览器
 }
 response.setContentType("application/x-octet-stream");//告知浏览器下载文件，而不是直接打开，浏览器默认为打开
 response.setHeader("Content-Disposition" ,"attachment;filename=" +finalFileName);//下载文件的名称
 
 ServletOutputStream servletOutputStream=response.getOutputStream();
 DataOutputStream temps = new DataOutputStream(servletOutputStream);
 
 DataInputStream in = new DataInputStream(new FileInputStream(filePath));//浏览器下载文件的路径
 byte[] b = new byte[2048];
 File reportZip=new File(filePath);//之后用来删除临时压缩文件
 try {
 while ((in.read(b)) != -1) {
 temps.write(b);
 }
 temps.flush();
 } catch (Exception e) {
 e.printStackTrace();
 optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"),
 TOptlogService.TYPE_MR, "", au.getUsername() + "批量下载图片"+fileZip+"失败！");
 }finally{
 if(temps!=null) temps.close();
 if(in!=null) in.close();
 if(reportZip!=null) reportZip.delete();//删除服务器本地产生的临时压缩文件
 servletOutputStream.close();
 }
 /**
 *if (picInfolList.size() > 0) {
 rc.put("success", true);
 rc.put("picInfo", picInfolList);
 optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"),
 TOptlogService.TYPE_MR, "", au.getUsername() + "查询批量下载"+params.get("f_svr_code")+"成功！");
 } else {
 rc.put("success", false);
 rc.put("errmsg", "test info");
 optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"),
 TOptlogService.TYPE_MR, "", au.getUsername() + "查询批量下载"+params.get("f_svr_code")+"失败！");
 }*/
 optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"),
 TOptlogService.TYPE_MR, "", au.getUsername() + "批量下载图片"+fileZip+"成功！");
 return ;
 }