Remove double quotes from JSON String

Question

I've below JSON string:

{ "students" : "[  {\"studentId\" : \"A1\",\"studentNumber\" 
 : \"287\",\"studentType\" : \"FullTime\"} ]"  }

In order to deserialize this string in java object, I've to remove \ which can be done using string replace method. Apart from that there are double quotes also just before [ and after ]. how do I remove these double quotes or allow them while deserializeing using Jackson.

What if there is a data in any field containing a backslash like: studentNumber: 2016\287 ? Still will you string replace? — Shafi
– Shafi, Commented Mar 6, 2019 at 5:36
use JSON parsing instead. It should create the object from the json string. stackoverflow.com/questions/2591098/how-to-parse-json-in-java — Shafi
– Shafi, Commented Mar 6, 2019 at 5:38
There won't be any data with backslash. main concern here is " before [ and after ]. — gaity
– gaity, Commented Mar 6, 2019 at 5:39
Answer of this question will help you. stackoverflow.com/questions/10308452/… — Shafi
– Shafi, Commented Mar 6, 2019 at 5:40

Alok Dubey · Accepted Answer · 2019-03-06 05:39:41Z

5

You don't have to do it yourself, jackson will take care of it. Create a pojo class Student and you can write something like below:

ObjectMapper mapper = new ObjectMapper();
Student student = mapper.readValue(responseBody, Student.class);

answered Mar 6, 2019 at 5:39

Alok Dubey

4194 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

gaity Over a year ago

I did the same thing but because of extra \ and quotes before [ and after ] it's giving error. I removed \ using replace method but not able to remove quotes before [ and after ].

gaity Over a year ago

Below string works fine with my code: { "students" : [ {"studentId" : "A1","studentNumber" : "287","studentType" : "FullTime"} ] }

Abhishek Patyal · Accepted Answer · 2019-03-06 05:53:31Z

1

Try to replace "[ with [ and ]" with ]

json = json.replaceAll("\"\\[","[");
json = json.replaceAll("\\]\"", "]");

answered Mar 6, 2019 at 5:53

Abhishek Patyal

5244 silver badges8 bronze badges

3 Comments

gaity Over a year ago

This is working fine. Just one question.. why do we add \\ before [ and ].

Felk Over a year ago

This is a hack that will likely break for nontrivial cases. I suspect the deserialized data will be wrong if anything in the student-objects contains json-escaped characters (e.g. quotes ", which will be doubly escaped) or "[ or "].

Ashwin Prabhu Over a year ago

This should not have been the accepted answer

Tayyab Razaq · Accepted Answer · 2019-03-06 06:06:37Z

0

Like ObjectMapper, we also may use Gson for same purpose.

Gson gson = new Gson();
gson.fromJson(responseBody, Student.class);

answered Mar 6, 2019 at 6:06

Tayyab Razaq

3782 silver badges11 bronze badges

Comments

Bhukailas · Accepted Answer · 2019-08-16 08:50:34Z

0

public class StringTypeSerializationAdapter extends TypeAdapter<String> {


public String read(JsonReader reader) {
    throw new UnsupportedOperationException();
}

public void write(JsonWriter writer, String value) throws IOException {
    if (value == null) {
        writer.nullValue();
        return;
    }
    writer.jsonValue(value);
}

}

above removes quotes from strings using GSON string adapter

answered Aug 16, 2019 at 8:50

Bhukailas

577 bronze badges

Collectives™ on Stack Overflow

Remove double quotes from JSON String

4 Answers 4

2 Comments

3 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

2 Comments

3 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related