xml -> json
- attribute -> underscore + key
- tag -> key
- content -> value
例如：
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<messages>
<note id="501">
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
<note id="502">
<to>Jani</to>
<from>Tove</from>
<heading>Re: Reminder</heading>
<body>I will not</body>
</note>
</messages>
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{
"messages": {
"note": [
{
"to": "Tove",
"from": "Jani",
"heading": "Reminder",
"body": "Don't forget me this weekend!",
"_id": "501"
},
{
"to": "Jani",
"from": "Tove",
"heading": "Re: Reminder",
"body": "I will not",
"_id": "502"
}
]
}
}