How to split two json String

Question

I have a string but it contains two object like the following {"firstName":"A","lastName":"Z"}{"firstName":"B","lastName":"Y"} I got this string as a response but I want to process it one by one, so how I should separate this one like {"firstName":"A","lastName":"Z"} and {"firstName":"B","lastName":"Y"}

How do you get the strings? Are they separated by a line break or a similar delimiter? Do you get one string per line? — jabaa, May 20 '22 at 08:04
i get this string as response in one line {"firstName":"A","lastName":"Z"}{"firstName":"B","lastName":"Y"} and in Java — pratikpoponimb, May 20 '22 at 08:11
Does this answer your question? [How to split a string in Java](https://stackoverflow.com/questions/3481828/how-to-split-a-string-in-java) — pringi, May 20 '22 at 08:19
It's not valid JSON. It's just a string that _resembles_ JSON. — Andy, May 20 '22 at 08:25
Valid JSON would be `[{"firstName":"A","lastName":"Z"},{"firstName":"B","lastName":"Y"}]`. — Andy, May 20 '22 at 08:30
@Andy Yes you are right but i got response from server {"firstName":"A","lastName":"Z"}{"firstName":"B","lastName":"Y"} — pratikpoponimb, May 20 '22 at 08:34
Essentially you just need to split the string, and process each segment as if it were a valid JSON object. What you have isn't valid as an object or an array. One way to do it is split the string on "}{" which isn't a valid JSON sequence, and shouldn't appear anywhere else. Assuming there are no other new lines in the string, something like this should do the job... `String[] objects = inputString.replaceAll("\\}\\{","\\}\n\\{").split("\n");` — bigtlb, May 21 '22 at 18:53

score 1 · Accepted Answer · edited May 20 '22 at 09:07

1

Object mapper = new ObjectMapper();   
 List<YourClass> ls= ((ObjectMapper) mapper).readValue(
                    "[{"firstName":"A","lastName":"Z"},{"firstName":"B","lastName":"Y"}]",
                    new TypeReference<List<YourClass>>() {
                    });
//process list.

YourClass is mapping class of json input. Hope this is what you are looking for.

Edit:

As your input is received in {"firstName":"A","lastName":"Z"}{"firstName":"B","lastName":"Y"} fashion, then

String input = "{\"firstName\":\"A\",\"lastName\":\"Z\"}{\"firstName\":\"B\",\"lastName\":\"Y\"}";

String array[] = input.split("(?=\\{)|(?<=\\})");

System.out.println(array[0]);
System.out.println(array[1]);

Output:

{"firstName":"A","lastName":"Z"}
{"firstName":"B","lastName":"Y"}

edited May 20 '22 at 09:07

user16320675

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answered May 20 '22 at 08:13

Ashish Patil

4,428
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in array[] i got [{"firstName":"A","lastName":"Z"}, , {"firstName":"B","lastName":"Y"}] in array[0] i got {"firstName":"A","lastName":"Z"} and array[1] i got blank and array[2] i got {"firstName":"B","lastName":"Y"} – pratikpoponimb May 20 '22 at 08:38
Because you have extra `, ` in your input, can you please see what happens without it? – Ashish Patil May 20 '22 at 08:43
@Ashish Patil sure – pratikpoponimb May 20 '22 at 08:59
if i want array[1]= {"firstName":"B","lastName":"Y"} for that what should i do – pratikpoponimb May 20 '22 at 09:41
It means, your input is quite malformed & you have extra blank `,` within it. like `{"firstName":"A","lastName":"Z"}, , {"firstName":"B","lastName":"Y"} `. If you are receiving such malformed input, then that would be problem & you will receive even some other characters in between. Best you can do is ignore if array's element is blank & move on to next element. – Ashish Patil May 20 '22 at 09:45

How to split two json String

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