如何动态转义Java中的JSON中的双引号

Question

How to escape double quotes inside a JSON given the data in the JSON will be obtained dynamically in Java.

Example:

{
    "key": "I ask silly questions on "https://www.stackoverflow.com". "
}

In this case, the value in the JSON is populated from dynamically let's say from a user input.

I have tried StringEscapeUtils provided by apache-commons-lang ( https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringEscapeUtils.html ), but this escapes the entire JSON where as the double quotes inside the JSON needs to escape again.

Possible solution will be to use regex and filter out the value in JSON and escape once before escaping the overall JSON.

But, is there any JAR to escape the inner contents of a JSON?

Answer 1

If doing json processing in java I would use Jackson databind and let it handle json generation. You will probably want to turn some knobs eventually, but simplest possible usage will probably do for this use case:

ObjectMapper objectMapper = new ObjectMapper();
String json = objectMapper.writeValueAsString(singletonMap("key", "I ask silly questions..."));