java - 编写不带转义字符的 jackson objectNode

Question

我想在写字符串时删除转义字符。我的代码如下。

private static ObjectMapper objectMapper = new ObjectMapper();

public static JsonNode MyMethod()
{
         InputStream cleanUp = TestHelper.class.getClassLoader().getResourceAsStream("file.txt");
        message = new String(cleanUp.readAllBytes());

      objectMapper.getFactory().configure(JsonWriteFeature.ESCAPE_NON_ASCII.mappedFeature(),false);
      root = objectMapper.readTree(new File("filePath"));

      ((ObjectNode) root).put("message", message );
 
      return root;

}

包含的file.txt

[{\n    \"timestamp\": 1599456392538

预期的 ：

"[{\n    \"timestamp\": 1599456392538"

实际的 ：

"[{\\n    \\\"timestamp\\\": 1599456392538"