JavaWeb 实现多个文件压缩下载功能

public class FileBean implements Serializable {   private Integer fileId;// 主键   private String filePath;// 文件保存路径   private String fileName;// 文件保存名称   public FileBean() {   }   public Integer getFileId() {     return fileId;   }   public void setFileId(Integer fileId) {     this.fileId = fileId;   }   public String getFilePath() {     return filePath;   }   public void setFilePath(String filePath) {     this.filePath = filePath;   }   public String getFileName() {     return fileName;   }   public void setFileName(String fileName) {     this.fileName = fileName;   } } 

@RequestMapping(value = "/download", method = RequestMethod.GET)   public String download(String id, HttpServletRequest request,       HttpServletResponse response) throws IOException {     String str = "";     if (id != null && id.length() != 0) {       int index = id.indexOf("=");       str = id.substring(index + 1);       String[] ids = str.split(",");       ArrayList<FileBean> fileList = new ArrayList<FileBean>();       for (int i = 0; i < ids.length; i++) {// 根据id查找genericFileUpload，得到文件路径以及文件名         GenericFileUpload genericFileUpload = new GenericFileUpload();         genericFileUpload = genericFileUploadService.find(Long.parseLong(ids[i]));         FileBean file = new FileBean();         file.setFileName(genericFileUpload.getFileName());         file.setFilePath(genericFileUpload.getFilePath());         fileList.add(file);       }       //设置压缩包的名字       //解决不同浏览器压缩包名字含有中文时乱码的问题       String zipName = "download.zip";       response.setContentType("APPLICATION/OCTET-STREAM");       response.setHeader("Content-Disposition", "attachment; filename="+ zipName);       //设置压缩流：直接写入response，实现边压缩边下载       ZipOutputStream zipos =null;       try{         zipos=new ZipOutputStream(new BufferedOutputStream(response.getOutputStream()));         zipos.setMethod(ZipOutputStream.DEFLATED);//设置压缩方法        }catch(Exception e){         e.printStackTrace();       }       DataOutputStream os=null;       //循环将文件写入压缩流       for(int i=0;i<fileList.size();i++){         String filePath=fileList.get(i).getFilePath();         String fileName=fileList.get(i).getFileName();         File file=new File(filePath+"/"+fileName);//要下载文件的路径         try{           //添加ZipEntry，并ZipEntry中写入文件流           //这里，加上i是防止要下载的文件有重名的导致下载失败           zipos.putNextEntry(new ZipEntry(i+fileName));           os=new DataOutputStream(zipos);           InputStream is=new FileInputStream(file);           byte[] b = new byte[100];           int length = 0;           while((length = is.read(b))!= -1){             os.write(b, 0, length);           }           is.close();           zipos.closeEntry();         }catch(Exception e){           e.printStackTrace();         }       }        //关闭流       try {         os.flush();         os.close();         zipos.close();       } catch (IOException e) {         e.printStackTrace();       }           }     return "redirect:list.jhtml";   }