JSON简介

数据在名称/值对中：

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"firstName":"John"

数据由逗号分隔：

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"firstName":"John","lastName":"Doe"

花括号保存对象（Object）：

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{"firstName":"John","lastName":"Doe"}

方括号保存数组（Array）：

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{"employees":[{"firstName":"John","lastName":"Doe"},{"Anna":"John","lastName":"Smith"},{"firstName":"Peter","lastName":"Jones"}]