python dom解析xml 总结

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最近开发了一个程序，需要解析xml,因此写了个小demo学习研究

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、直接上代码

2.1 如下是安卓手机源码中的一段xml文件，String.xml

<?xml version="1.0" encoding="utf-8"?><resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">       <!-- Settings item for boolean option to enable/disable MMS delivery reports -->    <string name="pref_title_mms_delivery_reports">Request delivery report</string>    <!-- Settings item for boolean option to enable/disable MMS group messages -->    <string name="pref_title_mms_group_mms">Group messaging</string>    <!-- Settings item for boolean option to enable/disable MMS read reports -->    <string name="pref_title_mms_read_reports">Request read report</string>    <!-- Settings item for boolean option to enable/disable SMS delivery reports -->    <string name="pref_title_sms_delivery_reports">Request delivery report</string>    <!-- Settings item for boolean option to enable/disable auto-deletion of messages -->    <string name="pref_title_auto_delete">Delete old messages</string>    <!-- Settings item for integer option to set SMS delete limit -->  </resources>

2.2 解析此xml

#!/usr/bin/pythonfrom  xml.dom import  minidomdef 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='String.xml'):    doc = minidom.parse(filename)    return doc.toxml('UTF-8')def get_xml_data(filename='/home/android/sprd4.4/demo1/src/com/demo1/String.xml'):    doc = minidom.parse(filename)     root = doc.documentElement    string_nodes = get_xmlnode(root,'string')    for node in string_nodes :print node nodeName = node.childNodes[0].data        mms_name = get_attrvalue(node,'name') print "mms_name ===== %s===== nodeName======%s===nodeString=== %s" % (mms_name,node.nodeName,nodeName)if __name__ == "__main__":    get_xml_data()

后续更新其它的解析方法

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