如何将此DataFrame转换为Json

import pandas as pd

# 创建一个示例DataFrame
data = {'Name': ['John', 'Emma', 'Mike'],
        'Age': [25, 28, 30],
        'City': ['New York', 'London', 'Paris']}
df = pd.DataFrame(data)

# 将DataFrame转换为JSON
json_data = df.to_json(orient='records')

print(json_data)

[{"Name":"John","Age":25,"City":"New York"},{"Name":"Emma","Age":28,"City":"London"},{"Name":"Mike","Age":30,"City":"Paris"}]