优化接口支持json是数组格式

cheliequan

2023-01-16 e52dbd2cfdd74040c012c70a1253b9031a085662

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new_obj.to_string()=[1.20,3.40,123456.78,5.00,23000000000.00]
new_obj.to_string()=[1.2,3.4,123456.78,5.0,2.3e10]