What if JSON data duplicates $ref

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Repetition of JSON data $ref

JSONArray type if we add the data inside, if the data is the same, then it will be replaced with $ref: that is, it will be simplified because the data points directly to the previous data.

Circular reference: when an object contains another object, fastjson parses the object into a reference. References are marked through $ref. Here are some descriptions of references

"$ref": ".." One level up

"$ref": "@" current object, that is, self-reference

"$ref": "$" root object

"$ref": "$.children.0" is a path-based reference, equivalent to root.getChildren (). Get (0)

For example, the following three bank cards are all owned by CCB, then this problem will occur because the bank information is exactly the same.

Because we are going to display the data at the front end, so this is definitely wrong, so what if we solve the problem?

It is said on the Internet that SerializerFeature.DisableCircularReferenceDetect is added.

1 first convert JSONArray to string and add SerializerFeature.DisableCircularReferenceDetect at this time

JSONArray.toJSONString (userBankJsonArray, SerializerFeature.DisableCircularReferenceDetect)

2 because it used to be in JSON format, we have to convert string to JSON.

JSONObject.parse (JSONArray.toJSONString (userBankJsonArray, SerializerFeature.DisableCircularReferenceDetect))

Then it will be no problem when it is passed to the front end for analysis.

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