使用 python/java 生成自定义 xml 文件

Question

我有一个清单["010WE" "021WG" "022X" .... "xxx"]我想根据以下模板创建/或覆盖一个 xml 文件：<?xml version="1.0" encoding="UTF-8"?><sweep runs="1">   <parameter name="Date" type="number" number_type="int" start="2" end="4" step="1">      <parameter name="table" type="list" value_type="java.lang.String" values="010WE 021WG 022X" />   </parameter></sweep>唯一的动态部分是values="010WE 021WG 022X"，它是从给定列表中读取的。欣赏有关如何使用 Python 或 Java 执行此操作的演示。

Answer 1

Java 方法。我使用了 JDK 8，它提供了内置的 SAX 解析器。

abc.xml：

<?xml version="1.0" encoding="UTF-8"?>

<sweep runs="1">

   <parameter name="Date" type="number" number_type="int" start="2" end="4" step="1">

      <parameter name="table" type="list" value_type="java.lang.String" values="" />

   </parameter>

</sweep>

Example.java :

import java.io.File;

import java.util.Arrays;

import java.util.List;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerException;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;

import org.w3c.dom.NamedNodeMap;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;

public class Example {

    public static void main(String[] args)

            throws ParserConfigurationException, SAXException, TransformerException {

        List<String> values = Arrays.asList("010WE", "021WG", "022X");

        // Read xml

        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();

        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();

        File file = new File("D:/abc.xml");

        Document document = documentBuilder.parse(file);

        NodeList list = document.getElementsByTagName("parameter");

        for (int i = 0; i < list.getLength(); i++) {

            Node node = list.item(i);

            NamedNodeMap map = node.getAttributes();

            if (map.getNamedItem("name").getNodeValue().equalsIgnoreCase("table")) {

                map.getNamedItem("values").setNodeValue(

                        values.toString().replace(",", "").replaceAll("\\s+", " ").replace("[", "").replace("]", ""));

            }

        }

        // modify xml by overwriting it.

        TransformerFactory tf = TransformerFactory.newInstance();

        Transformer transformer = tf.newTransformer();

        document.setXmlStandalone(true);

        DOMSource source = new DOMSource(document);

        StreamResult result = new StreamResult(file);

        transformer.transform(source,result);

    }

}

修改后的 abc.xml ：

<?xml version="1.0" encoding="UTF-8"?>

<sweep runs="1">

   <parameter end="4" name="Date" number_type="int" start="2" step="1" type="number">

      <parameter name="table" type="list" value_type="java.lang.String" values="010WE 021WG 022X"/>

   </parameter>

</sweep>

Answer 2

以下

XML_TEMPLATE = '''    

<?xml version="1.0" encoding="UTF-8"?>

<sweep runs="1">

   <parameter name="Date" type="number" number_type="int" start="2" end="4" step="1">

      <parameter name="table" type="list" value_type="java.lang.String" values="{}" />

   </parameter>

</sweep> '''

values = ['a','b','c']

xml = XML_TEMPLATE.format(' '.join(values))

print(xml)

Answer 3

解决方案：

此python脚本将在项目的根目录中生成一个 example.xml：

import xml.etree.ElementTree as ET

def prettify(element, indent='  '):

    queue = [(0, element)]  # (level, element)

    while queue:

        level, element = queue.pop(0)

        children = [(level + 1, child) for child in list(element)]

        if children:

            element.text = '\n' + indent * (level+1)  # for child open

        if queue:

            element.tail = '\n' + indent * queue[0][0]  # for sibling open

        else:

            element.tail = '\n' + indent * (level-1)  # for parent close

        queue[0:0] = children  # prepend so children come before siblings

def create_xml(input_list):

    xml_doc = ET.Element('sweep', runs='1')

    parameter = ET.SubElement(xml_doc, 'parameter', name='Date', type='number', number_type='int', start='2', end='4', step='1')

    ET.SubElement(parameter, 'parameter', name='table', type='list', value_type='java.lang.String', values=' '.join(input_list))

    prettify(xml_doc)

    tree = ET.ElementTree(xml_doc)

    tree.write('example.xml', encoding='UTF-8', xml_declaration=True)

def main():

    some_list = ['010WE', '021WG', '022X']

    create_xml(some_list)

if __name__ == '__main__':

    main()

基于帖子的答案：Pretty printing XML in Python