Python使用xml.dom.minidom解析、写入与更新XML文件详解

<?xml version="1.0" encoding="utf-8" ?>
<!-- This is list of customers -->
<customers>
 <customer ID="C001">
  <name>Acme Inc.</name>
  <phone>12345</phone>
  <comments>
   <![CDATA[Regular customer since 1995]]>
  </comments>
 </customer>
 <customer ID="C002">
  <name>Star Wars Inc.</name>
  <phone>23456</phone>
  <comments>
   <![CDATA[A small but healthy company.]]>
  </comments>
 </customer>
</customers>

# -*- coding: utf-8 -*-
"""
  @Author : LiuZhian
  @Time  : 2019/4/24 0024 上午 9:19
  @Comment : 
"""
from xml.dom.minidom import parse
def readXML():
 domTree = parse("./customer.xml")
 # 文档根元素
 rootNode = domTree.documentElement
 print(rootNode.nodeName)

 # 所有顾客
 customers = rootNode.getElementsByTagName("customer")
 print("****所有顾客信息****")
 for customer in customers:
 if customer.hasAttribute("ID"):
  print("ID:", customer.getAttribute("ID"))
  # name 元素
  name = customer.getElementsByTagName("name")[0]
  print(name.nodeName, ":", name.childNodes[0].data)
  # phone 元素
  phone = customer.getElementsByTagName("phone")[0]
  print(phone.nodeName, ":", phone.childNodes[0].data)
  # comments 元素
  comments = customer.getElementsByTagName("comments")[0]
  print(comments.nodeName, ":", comments.childNodes[0].data)

if __name__ == '__main__':
 readXML()

<customer ID="C003">
  <name>kavin</name>
  <phone>32467</phone>
  <comments>
   <![CDATA[A small but healthy company.]]>
  </comments>
 </customer>

def writeXML():
 domTree = parse("./customer.xml")
 # 文档根元素
 rootNode = domTree.documentElement

 # 新建一个customer节点
 customer_node = domTree.createElement("customer")
 customer_node.setAttribute("ID", "C003")

 # 创建name节点,并设置textValue
 name_node = domTree.createElement("name")
 name_text_value = domTree.createTextNode("kavin")
 name_node.appendChild(name_text_value) # 把文本节点挂到name_node节点
 customer_node.appendChild(name_node)

 # 创建phone节点,并设置textValue
 phone_node = domTree.createElement("phone")
 phone_text_value = domTree.createTextNode("32467")
 phone_node.appendChild(phone_text_value) # 把文本节点挂到name_node节点
 customer_node.appendChild(phone_node)

 # 创建comments节点,这里是CDATA
 comments_node = domTree.createElement("comments")
 cdata_text_value = domTree.createCDATASection("A small but healthy company.")
 comments_node.appendChild(cdata_text_value)
 customer_node.appendChild(comments_node)

 rootNode.appendChild(customer_node)

 with open('added_customer.xml', 'w') as f:
 # 缩进 - 换行 - 编码
 domTree.writexml(f, addindent=' ', encoding='utf-8')

if __name__ == '__main__':
 writeXML()

def updateXML():
 domTree = parse("./customer.xml")
 # 文档根元素
 rootNode = domTree.documentElement

 names = rootNode.getElementsByTagName("name")
 for name in names:
 if name.childNodes[0].data == "Acme Inc.":
  # 获取到name节点的父节点
  pn = name.parentNode
  # 父节点的phone节点，其实也就是name的兄弟节点
  # 可能有sibNode方法，我没试过，大家可以google一下
  phone = pn.getElementsByTagName("phone")[0]
  # 更新phone的取值
  phone.childNodes[0].data = 99999

 with open('updated_customer.xml', 'w') as f:
 # 缩进 - 换行 - 编码
 domTree.writexml(f, addindent=' ', encoding='utf-8')

if __name__ == '__main__':
 updateXML()

import os
import xml.etree.ElementTree as ET


def changesku(inputpath):
  listdir = os.listdir(inputpath)
  for file in listdir:
    if file.endswith('xml'):
      file = os.path.join(inputpath,file)
      tree = ET.parse(file)
      root = tree.getroot()
      for object1 in root.findall('object'):   #我要修改的元素在object里面，所以需要先找到object
        for sku in object1.findall('name'):  #查找想要修改的所有同种元素
          if (sku.text == '005'):         #‘005'为原始的text
            sku.text = '008'           #修改‘name'的标签值
            tree.write(file,encoding='utf-8')   #写进原始的xml文件，不然修改就无效，‘encoding = “utf - 8”'避免原始xml                                           #中文字符乱码

          else:
            pass                  
    else:
      pass

if __name__ == '__main__':
  
  inputpath = 'D:\\easy\\hebing_xml'     #这是xml文件的文件夹的绝对地址
  changesku(inputpath)