Java将视频文件、图片文件转Base64编码_视频字节流转成base 64

依赖

使用到工具类依赖

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.4</version>
</dependency>
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一、视频转Base64

1.1 视频转Base64输出txt文本

通过FileUtils.openInputStream()将视频文件转化成输入流。
然后通过IOUtils.toByteArray()直接将流经过Base64编码为String。最后通过FileWriter直接将String写入即可。

 @Test
    public void test() throws IOException {
        String sourceVideo = "/Users/LiuShihao/IdeaProjects/as-video-call-bussiness/as-video-business/src/main/resources/static/5.3gp" ;

        InputStream inputStream =  FileUtils.openInputStream(new File(sourceVideo));
        // encode
        String ss = new String(Base64.getEncoder().encode(IOUtils.toByteArray(inputStream)), Charsets.ISO_8859_1);
        File txtFilePath = new File("/Users/LiuShihao/IdeaProjects/as-video-call-bussiness/as-video-business/src/main/resources/static/5.3.txt");
        FileWriter fileWriter = new FileWriter(txtFilePath);
        fileWriter.write(ss);
        fileWriter.flush();
        fileWriter.close();
    }
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2.2 Base64转视频

使用BufferReader直接读取txt信息。一行行的读取到一个StringBuffer中，转成String，在经过Base64解码。最后通过字节流写成一个新的mp4文件。

 @Test
    public void test2() throws IOException {
        File txtFilePath = new File("/Users/LiuShihao/IdeaProjects/as-video-call-bussiness/as-video-business/src/main/resources/static/1.3.txt");
        BufferedReader bufferedReader = new BufferedReader(new FileReader(txtFilePath));
        StringBuffer sbf = new StringBuffer();
        String tempStr;
        while ((tempStr = bufferedReader.readLine()) != null) {
            sbf.append(tempStr);
        }
        bufferedReader.close();
        String ss = sbf.toString();
        InputStream is   =   new ByteArrayInputStream(Base64.getDecoder().decode(ss.getBytes(Charsets.ISO_8859_1)));
        FileOutputStream fos = new FileOutputStream(new File("/Users/LiuShihao/IdeaProjects/as-video-call-bussiness/as-video-business/src/main/resources/static/1.3gp_copy.mp4"));
        byte[] bytes = new byte[is.available()];
        System.out.println(bytes.length);
        int x = -1;
        while((x = is.read(bytes)) != -1) {
            fos.write(bytes);
        }
        is.close();
        fos.close();
    }
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二、图片转Base64

2.1 图片转Base64

public ResponseData imageToBase64(@RequestParam(name = "file")  MultipartFile[] imgs){
        log.info("文件长度:"+imgs.length);
        ResponseData<Object> data = ResponseData.defaultSuccess();
        HashMap<String, Object> map = new HashMap<>();
        try {
            for (MultipartFile img : imgs) {
                log.info("文件名："+img.getOriginalFilename());
                InputStream inputStream = img.getInputStream();
                String base64 = new String(Base64.getEncoder().encode(IOUtils.toByteArray(inputStream)), Charsets.UTF_8);
                map.put(img.getOriginalFilename(),base64);
            }
            data.setData(map);

        }catch (Exception e){
            data = ResponseData.defaultFail();
            data.setMessage(e.getMessage());
        }
        return data;
    }
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入参为MultipartFile类型，接收图片，在通过getInputStream转输入流，通过IOUtils.toByteArray方法将输入流转为ByteArray，在经过Base64.getEncoder().encode()进行Base64编码返回即可。

2.2 Base64转图片

public ResponseData base64ToImage(@RequestBody  Map<String,String> map ){
        ResponseData<Object> data = ResponseData.defaultSuccess();
        try {
            String base64 = map.get("base64");
            ByteArrayInputStream in = new ByteArrayInputStream(Base64.getDecoder().decode(base64.getBytes(Charsets.UTF_8)));

            File file = new File("/Users/LiuShihao/IdeaProjects/besttone-call-business/1.jpeg");

            FileOutputStream fos = new FileOutputStream(file);

            byte[] bytes = new byte[in.available()];
            int x = -1;
            while((x = in.read(bytes)) != -1) {
                fos.write(bytes);
            }
            in.close();
            fos.close();
            data.setData("SUCCESS");
        }catch (Exception e){
            data = ResponseData.defaultFail();
            data.setMessage(e.getMessage());
        }
        return data;
    }
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入参为经过Base64编码后的字符，首先通过Base64.getDecoder().decode()将字符串解码，在通过new构造一个ByteArrayInputStream输入流，构造一个File，获取这个File的输出流FileOutputStream，read读取输入流。write写入输出流。