zip文件和byte[]字节流的相互转换

1 <dependency>
2     <groupId>commons-io</groupId>
3     <artifactId>commons-io</artifactId>
4     <version>2.6</version>
5 </dependency>

1 public static byte[] readZipFileToByteArray(String filePath) throws Exception {
2     File file = new File(filePath);
3     if(!file.exists()){
4         return new byte[0];
5     }
6     return FileUtils.readFileToByteArray(file);
7 }

 1 public static void convertByteArrayToZipFile(byte[] certFile,String filePath) throws IOException{
 2     File zipFile = new File(filePath);
 3     try (
 4         OutputStream out = new FileOutputStream(zipFile);
 5         ){
 6         out.write(certFile);
 7         out.flush();
 8     }catch (Exception e){
 9         throw new IOException(e);
10     }
11 }

 1 public static String getFileContent(String zipFilePath,String innerFileName) throws IOException {
 2         ZipFile zipFile = new ZipFile(zipFilePath);
 3         String collect = zipFile.stream().filter(entry -> {
 4             return ((ZipEntry) entry).getName().equals(innerFileName);
 5         }).map(e -> {
 6 
 7             try (
 8                     InputStream inputStream = zipFile.getInputStream((ZipEntry) e);
 9             ) {
10                 return IOUtils.toString(inputStream, "utf-8");
11             } catch (IOException e1) {
12                 e1.printStackTrace();
13                 return "";
14             }
15         }).collect(Collectors.joining());
16         return collect;
17     }