Explain in detail the method of generating JSON string in Java

Example 1: add elements (including string pairs and arrays) to the map object once and convert it into a JSON object once.

code:

Operation results:

(packages needed can be downloaded from the official website: http://www.json.org/java/index.html ）

Example 2: list is converted into three parameter forms of JSON.

Operation results:

Example 3: convert JSON to list and map.

Operation results:

apple

orange

name Michael age 30

baby [Lucy,Lily]

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