读取json格式文件，将其格式化输出

 使用fastjson

@Test
    public void testdsa() throws IOException {
        /*JSONArray jsonArray = new JSONArray();
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("1", "222");
        JSONObject jsonObject2 = new JSONObject();
        jsonObject2.put("1111", "44444");
        jsonArray.add(jsonObject);
        jsonArray.add(jsonObject2);*/
        BufferedInputStream bis = null;
        StringBuilder sb = new StringBuilder();
        byte[] b = new byte[1024 * 1024];
        try {
            bis = new BufferedInputStream(new FileInputStream(new File("a - 副本.txt")));
            int len = -1;
            while ((len = bis.read(b)) != -1) {
                 sb.append(new String(b, 0, len));
            }
            System.out.println("jie");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bis != null)
                bis.close();
        }
        BufferedWriter bw = null;
        try {
            bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("out01.txt"))));
            JSONObject jsonObject = JSONObject.parseObject(sb.toString());
            JSONObject content = jsonObject.getJSONObject("content");
            if (content != null) {
                JSONArray etOutputs = content.getJSONArray("etOutputs");

                for (int i = 0; i < etOutputs.size(); i++) {
                    JSONObject obj = etOutputs.getJSONObject(i);
                    String pretty = JSON.toJSONString(obj, SerializerFeature.PrettyFormat, SerializerFeature.WriteMapNullValue,
                            SerializerFeature.WriteDateUseDateFormat);
                    bw.write(pretty);
                    bw.newLine();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bw != null) {
                bw.close();
            }
        }
    }