文件压缩工具类

/**
     * 将拉取的文件打包为zip
     * @param filePathList 文件路径列表
     * @param savePath 保存路径
     * @param zipName zip名称
     * @return zip路径
     */
    public String generateZip(ArrayList<String>filePathList,String savePath,String zipName) throws IOException{
        String zipPath=savePath+"/"+zipName;
        File zip =new File(zipPath);
        FileOutputStream outputStream=new FileOutputStream(zip);
        ZipOutputStream out =new ZipOutputStream(outputStream);
        filePathList.forEach(row->{
                //要压缩的单个文件路径
                String oneFilePath = row;
                File inputFile = new File(oneFilePath);
                //生成zip包中的zip实体
                ZipEntry zipEntry=new ZipEntry(inputFile.getName());
                try {
                    byte[] buffer = new byte[1024];
                    FileInputStream fileInputStream=new FileInputStream(oneFilePath);
                    out.putNextEntry(zipEntry);
                    int len;
                    //读入需要下载的文件的内容，打包到zip文件
                    while ((len = fileInputStream.read(buffer)) != -1) {
                        out.write(buffer, 0, len);
                    }
                    fileInputStream.close();
                }catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        });
        out.closeEntry();
        out.close();
        return  zipPath;
    }

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