python开发_xml.dom_解析XML文档_完整版_博主推荐

在阅读之前，你需要了解一些xml.dom的一些理论知识，在这里你可以对xml.dom有一定的了解，如果你阅读完之后。

下面是我做的demo

运行效果:

解析的XML文件位置：c:\\test\\hongten.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <students>
     <student no="2009081097">
         <name>Hongten</name>
         <gender>M</gender>
         <age>20</age>
         <score subject="math">97</score>
         <score subject="chinese">90</score>
     </student>
     <student no="2009081098">
         <name>DuDu</name>
         <gender>W</gender>
         <age>21</age>
         <score subject="math">87</score>
         <score subject="chinese">96</score>
     </student>
     <student no="2009081099">
         <name>Sum</name>
         <gender>M</gender>
         <age>19</age>
         <score subject="math">64</score>
         <score subject="chinese">98</score>
     </student>
 </students>

====================================================

代码部分：

====================================================

 #python xml.dom

 #Author   :   Hongten
 #Mailto   :   hongtenzone@foxmail.com
 #Blog     :   http://www.cnblogs.com/hongten
 #QQ       :   648719819
 #Version  :   1.0
 #Create   :   2013-09-03

 import os
 from xml.dom import minidom

 #global var
 SHOW_LOG = True
 XML_PATH = None

 def get_dom_by_parse(path):
     '''根据XML文件地址解析XML文件，返回dom对象'''
     if os.path.exists(path):
         if SHOW_LOG:
             print('开始解析XML文件：[{}]'.format(path))
         return minidom.parse(path)
     else:
         print('the path [{}] dose not exist!'.format(path))

 def get_dom_by_file(path):
     '''解析作为文档打开的XML文件'''
     if os.path.exists(path):
         if SHOW_LOG:
             print('开始打开XML文件：[{}]'.format(path))
         with open(path) as pf:
             if SHOW_LOG:
                 print('开始解析XML文件：[{}]'.format(path))
             return minidom.parse(pf)
     else:
         print('the path [{}] dose not exist!'.format(path))

 def get_dom_by_string(s):
     '''解析以字符串形式的XML数据格式'''
     if s is not None and s != '':
         if SHOW_LOG:
             print('开始解析字符串形式的XML数据：[{}]'.format(s))
         return minidom.parseString(s)
     else:
         print('the input string is None or equals \'\'.')

 def get_root(dom):
     '''返回XML文件的根节点'''
     if dom is not None:
         return dom.documentElement
     else:
         print('the dom is None!')

 def get_element_children(fatherElement, subNodeName):
     '''根据父节点fatherElement获取子节点subNodeName'''
     if fatherElement is not None:
         if subNodeName is not None and subNodeName != '':
             return fatherElement.getElementsByTagName(subNodeName)
         else:
             print('the sub node name is None or equals \'\'.')
     else:
         print('the father node is None!')

 def get_element_value(element, index=0):
     '''获取节点的值'''
     if element is not None:
         return element.childNodes[index].nodeValue
     else:
         print('the element is None!')

 def get_element_attrib_value(element, name):
     '''根据节点element的属性名称name获取属性名称的值'''
     if element is not None:
         if name is not None and name != '':
             return element.getAttribute(name)
         else:
             print('the name is None or equals \'\'.')
     else:
         print('the element is None!')

 def get_info(root_children):
     '''解析XML内容'''
     info = []
     for item in root_children:
         subs = []
         score_value = []
         i_no = get_element_attrib_value(item, 'no')
         i_name = get_element_children(item, 'name')
         i_gender = get_element_children(item, 'gender')
         i_age = get_element_children(item, 'age')
         i_score = get_element_children(item, 'score')
         for sub in i_score:
             i_sub = get_element_attrib_value(sub, 'subject')
             subs.append(i_sub)

         v_name = get_element_value(i_name[0])
         v_gender = get_element_value(i_gender[0])
         v_age = get_element_value(i_age[0])
         for s in range(len(i_score)):
             score_value.append(s)
         v_score = dict(zip(subs, score_value))
         info.append(v_name)
         info.append(v_gender)
         info.append(v_age)
         info.append(v_score)
     return info

 def init():
     global SHOW_LOG
     SHOW_LOG = True
     global XML_PATH
     XML_PATH = 'C:\\test\\hongten.xml'

 def main():
     init()
     dom = get_dom_by_parse(XML_PATH)
     root = dom.documentElement
     print(root)
     root_children = get_element_children(root, 'student')
     print(root_children)
     info = get_info(root_children)
     print(info)

 if __name__ == '__main__':
     main()