如何将字节流图像数据放入JSON对象？

我想使用字节流格式将多个图像放在JSON对象中，我编写了以下代码。

I want to put multiple images in JSON object using byte stream format, i wrote the following code.

FileInputStream fin = new FileInputStream(pathToImages+"//"+"01.jpg");

        BufferedInputStream bin = new BufferedInputStream(fin);  

        BufferedOutputStream bout = new BufferedOutputStream(out);  
        int ch =0; ;  

        sun.misc.BASE64Encoder encoder= new sun.misc.BASE64Encoder();
        byte[] contents = new byte[5000000];
        int bytesRead = 0;
        String strFileContents;
        while ((bytesRead = bin.read(contents)) != -1) {
            bout.write(encoder.encode(contents).getBytes());
        }
JsonObject myObj = new JsonObject();

我想将编码的字节流放在myObj中，但不知道该怎么做。

I want to put encoded byte stream in myObj,but dont know how to do it.

谢谢