如何Convert JSON 到 XML

问题

你需要发送数据到 系统该 expects XML, 但你的源 数据是 在 JSON 格式化.

前置条件

• Understanding 的 JSON
• Understanding 的 XML 结构

步骤

1. 1. Define the conversion rules

   JSON objects become XML elements, keys become tag names, and values become element content. Arrays need special handling: each element becomes a repeated child tag. Decide on a root element name and how to represent arrays and null values.

   输入

   {"users":[{"name":"Alice"}]}

   输出

   rules defined

2. 2. Perform the conversion

   Convert the JSON to XML following your rules. Nested objects become nested elements. Array items use the parent key as the tag name. Strings become text content; numbers and booleans become text content (XML has no native types).

   输入

   {"users":[{"name":"Alice"}]}

   输出

   <users><name>Alice</name></users>

3. 3. Validate the XML output

   Parse the resulting XML to ensure it is well-formed. Check that all tags are closed, special characters are escaped (& < > are escaped as &amp; &lt; &gt;), and the encoding declaration is correct if needed.

   输入

   <users><name>Alice</name></users>

   输出

   well-formed XML ✓

预期结果

well-formed XML document 该 represents 相同数据 as 原始 JSON.

常见错误

XML tags start with a number or contain spaces

XML tag names must start with a letter or underscore and cannot contain spaces. Sanitize JSON keys before converting.

Special characters not escaped

Escape &, <, >, ", and ' as XML entities. The converter should handle this automatically.

排障指引

• If the XML parser rejects the output, check for unescaped special characters and unclosed tags.
• JSON null has no direct XML equivalent. Decide on a convention (empty element, xsi:nil attribute, or omission).

安全限制

• XML can be vulnerable to XXE (XML External Entity) attacks if parsed with an unsafe parser. Use a parser that disables DTD and external entities.