• 周四. 8月 11th, 2022

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java将多个文件的字节数组压缩成一个字节数组,并生成zip文件

admin

11月 28, 2021
public static void main(String[] args) throws IOException {

        Map<String,byte[]> map=new HashMap<>();
        map.put("application.properties",getBytes(new File("F:\shop-mail2\shop-apigateway\src\main\resources\application.properties")));
        map.put("application.yml",getBytes(new File("F:\shop-mail2\shop-apigateway\src\main\resources\application.yml")));
        System.out.println(listBytesToZip(map).length);

        String filepath="F:\test\";
        String filename="test.zip";
        fileToBytes(listBytesToZip(map),filepath,filename);
    }

    protected static byte[] listBytesToZip(Map<String,byte[]> mapReporte) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        ZipOutputStream zos = new ZipOutputStream(baos);

        for (Map.Entry<String,byte[]> reporte : mapReporte.entrySet()) {
            ZipEntry entry = new ZipEntry(reporte.getKey());

            entry.setSize(reporte.getValue().length);

            zos.putNextEntry(entry);

            zos.write(reporte.getValue());

        }
        zos.closeEntry();
        zos.close();
        return baos.toByteArray();
    }

    private static byte[] getBytes(File file) throws IOException {
        FileInputStream fis=new FileInputStream(file);
        ByteArrayOutputStream bao=new ByteArrayOutputStream();
        byte[] b=new byte[1024];
        int len=-1;
        while ((len=fis.read(b))!=-1){
            bao.write(b,0,len);
        }
        return bao.toByteArray();
    }

    public static void fileToBytes(byte[] bytes, String filePath, String fileName) {
        BufferedOutputStream bos = null;
        FileOutputStream fos = null;
        File file = null;
        try {

            file = new File(filePath + fileName);
            if (!file.getParentFile().exists()){
                //文件夹不存在 生成
                file.getParentFile().mkdirs();
            }
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            bos.write(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bos != null) {
                try {
                    bos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

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