在 Java InputStream 中处理 unicode escaping

Question

I am reading json files to String, I sometimes update them (replace some specific words by others) and then write those update json files in a zip. This is what an example input file looks like:

The issue is, the output "loses" character escaping and is therefore no longer a valid json:

To read the json:

    private InputStream processJsonFile(File file) throws IOException {
        String content;
        if (!file.exists())
            return new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));
        try {
            content = IOUtils.toString(new FileReader(file, StandardCharsets.UTF_8));
        } catch (IOException | NullPointerException e) {
            Logs.logError("Error while reading file " + file.getPath());
            Logs.logError("It seems to be malformed!");
            return new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));
        } finally {
            IOUtils.closeQuietly();
        }

        // here i do things with content

        return new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
    }

to add an inputstream to the zip file:

  try (fis) {
            while ((length = fis.read(bytes)) >= 0)
                zos.write(bytes, 0, length);
        } 

Answer 1

You're outputting raw Unicode values, when you should be encoding them as Unicode constants eg \unnnn .

Use a library to encode the content, eg

content = EntityUtils.toString(content,"UTF-8");