如何将XML格式转换为JSON格式

import xml.etree.ElementTree as ET
import json

def xml_to_json(xml_string):
    root = ET.fromstring(xml_string)
    json_data = {}
    json_data[root.tag] = element_to_json(root)
    return json.dumps(json_data)

def element_to_json(element):
    if len(element) == 0:
        return element.text
    else:
        json_data = {}
        for child in element:
            if child.tag not in json_data:
                json_data[child.tag] = []
            json_data[child.tag].append(element_to_json(child))
        return json_data

# 示例XML字符串
xml_string = '''
<root>
    <person>
        <name>John Doe</name>
        <age>30</age>
    </person>
    <person>
        <name>Jane Smith</name>
        <age>25</age>
    </person>
</root>
'''

# 转换为JSON格式
json_string = xml_to_json(xml_string)
print(json_string)