一 、xml.dom 解析XML的API描述
- minidom.parse(filename)
加载读取XML文件
- doc.documentElement
获取XML文档对象
- node.getAttribute(AttributeName)
获取XML节点属性值
- node.getElementsByTagName(TagName)
获取XML节点对象集合
- node.childNodes
返回子节点列表。
- node.childNodes[index].nodeValue
获取XML节点值
- node.firstChild
访问第一个节点。等价于pagexml.childNodes[0]
- doc = minidom.parse(filename)
- doc.toxml('UTF-8')
返回Node节点的xml表示的文本
- Node.attributes["id"]
a.name #就是上面的 "id"
a.value #属性的值
访问元素属性
二、代码演示
1、创建user.xml文件,添加XMl节点
- <?xml version="1.0" encoding="UTF-8" ?>
- <users>
- <user id="1000001">
- <username>Admin</username>
- <email>[email protected]</email>
- <age>23</age>
- <sex>男</sex>
- </user>
- <user id="1000002">
- <username>Admin2</username>
- <email>[email protected]</email>
- <age>22</age>
- <sex>男</sex>
- </user>
- <user id="1000003">
- <username>Admin3</username>
- <email>[email protected]</email>
- <age>27</age>
- <sex>男</sex>
- </user>
- <user id="1000004">
- <username>Admin4</username>
- <email>[email protected]</email>
- <age>25</age>
- <sex>女</sex>
- </user>
- <user id="1000005">
- <username>Admin5</username>
- <email>[email protected]</email>
- <age>20</age>
- <sex>男</sex>
- </user>
- <user id="1000006">
- <username>Admin6</username>
- <email>[email protected]</email>
- <age>23</age>
- <sex>女</sex>
- </user>
- </users>
2、Demo.py解析user.xml文档数据
- # -*- coding:utf-8 -*-
- """
- * User: lhj588
- * Date: 11-11-9
- * Time: 13:20
- * Desc:
- """
- from xml.dom import minidom
- def get_attrvalue(node, attrname):
- return node.getAttribute(attrname) if node else ''
- def get_nodevalue(node, index = 0):
- return node.childNodes[index].nodeValue if node else ''
- def get_xmlnode(node,name):
- return node.getElementsByTagName(name) if node else []
- def xml_to_string(filename='user.xml'):
- doc = minidom.parse(filename)
- return doc.toxml('UTF-8')
- def get_xml_data(filename='user.xml'):
- doc = minidom.parse(filename)
- root = doc.documentElement
- user_nodes = get_xmlnode(root,'user')
- user_list=[]
- for node in user_nodes:
- user_id = get_attrvalue(node,'id')
- node_name = get_xmlnode(node,'username')
- node_email = get_xmlnode(node,'email')
- node_age = get_xmlnode(node,'age')
- node_sex = get_xmlnode(node,'sex')
- user_name =get_nodevalue(node_name[0]).encode('utf-8','ignore')
- user_email = get_nodevalue(node_email[0]).encode('utf-8','ignore')
- user_age = int(get_nodevalue(node_age[0]))
- user_sex = get_nodevalue(node_sex[0]).encode('utf-8','ignore')
- user = {}
- user['id'] , user['username'] , user['email'] , user['age'] , user['sex'] = (
- int(user_id), user_name , user_email , user_age , user_sex
- )
- user_list.append(user)
- return user_list
- def test_xmltostring():
- print xml_to_string()
- def test_laod_xml():
- user_list = get_xml_data()
- for user in user_list :
- #print user['sex']
- print '-----------------------------------------------------'
- if user:
- user_str='编 号:%d\n用户名:%s\n性 别:%s\n年 龄:%s\n邮 箱:%s\n ' % (int(user['id']) , user['username'], user['sex'] , user['age'] , user['email'])
- print user_str
- print '====================================================='
- if __name__ == "__main__":
- test_xmltostring()
- test_laod_xml()
3,3、测试效果
A、测试toxml
demo.py中文件修改成
- if __name__ == "__main__":
- test_xmltostring()
查看打印结果:
- <user id="1000001">
- <username>Admin</username>
- <email>[email protected]</email>
- <age>23</age>
- <sex>男</sex>
- </user>
- <user id="1000002">
- <username>Admin2</username>
- <email>[email protected]</email>
- <age>22</age>
- <sex>男</sex>
- </user>
- <user id="1000003">
- <username>Admin3</username>
- <email>[email protected]</email>
- <age>27</age>
- <sex>男</sex>
- </user>
- <user id="1000004">
- <username>Admin4</username>
- <email>[email protected]</email>
- <age>25</age>
- <sex>女</sex>
- </user>
- <user id="1000005">
- <username>Admin5</username>
- <email>[email protected]</email>
- <age>20</age>
- <sex>男</sex>
- </user>
- <user id="1000006">
- <username>Admin6</username>
- <email>[email protected]</email>
- <age>23</age>
- <sex>女</sex>
- </user>
B、测试解析xml
demo.py文件中修改成:
if __name__ == "__main__":
test_laod_xml()
执行打印结果:
- -----------------------------------------------------
- 编 号:1000001
- 用户名:Admin
- 性 别:男
- 年 龄:23
- 邮 箱:[email protected]
- =====================================================
- -----------------------------------------------------
- 编 号:1000002
- 用户名:Admin2
- 性 别:男
- 年 龄:22
- 邮 箱:[email protected]
- =====================================================
- -----------------------------------------------------
- 编 号:1000003
- 用户名:Admin3
- 性 别:男
- 年 龄:27
- 邮 箱:[email protected]
- =====================================================
- -----------------------------------------------------
- 编 号:1000004
- 用户名:Admin4
- 性 别:女
- 年 龄:25
- 邮 箱:[email protected]
- =====================================================
- -----------------------------------------------------
- 编 号:1000005
- 用户名:Admin5
- 性 别:男
- 年 龄:20
- 邮 箱:[email protected]
- B、测试解析XML
- demo.py 文件中修改成
- =====================================================
- -----------------------------------------------------
- 编 号:1000006
- 用户名:Admin6
- 性 别:女
- 年 龄:23
- 邮 箱:[email protected]
- =====================================================
来源: http://www.phpxs.com/code/1004868/