Python如何用dom模块生成XML文件呢?

主要方法三点:

首先、生成XML节点(node)

createElement("node_name")

然后、给节点添加属性值(Attribute)

node.setAttribute("att_name", "arr_value")

最后、节点的标签值(data)

createTextNode("node_value")

其中第1、3点在创建完节点(节点值)之后，还需使用下面的方法添加到指点的节点的位置下面：

prev_node.appendChild(cur_node)

这里的prev_node要添加节点的上一层节点，而cur_node即为当前要添加的节点了。

代码如下：

Created on 2012-8-28

@author:  walfred

@module: domxml.genXML

@description:

'''

import xml.dom.minidom as Dom

if __name__ == "__main__":

doc = Dom.Document()

root_node = doc.createElement("book_store")

root_node.setAttribute("name", "newhua")

root_node.setAttribute("website", "CODEGO.net")

doc.appendChild(root_node)

book_node = doc.createElement("book1")

book_name_node = doc.createElement("name")

book_name_value = doc.createTextNode("hamlet")

book_name_node.appendChild(book_name_value)

book_node.appendChild(book_name_node)

book_author_node = doc.createElement("author")

book_author_value = doc.createTextNode("William Shakespeare")

book_author_node.appendChild(book_author_value)

book_node.appendChild(book_author_node)

root_node.appendChild(book_node)

f = open("book_store.xml", "w")

f.write(doc.toprettyxml(indent = "\t", newl = "\n", encoding = "utf-8"))

f.close()

这个代码将在当前目录下生成一个book_store.xml文件：

hamlet

William Shakespeare

代码如下：

Created on 2012-8-28

@author:  walfred

@module: domxml.wXMLbyDom

@description:

import xml.dom.minidom as Dom

class XMLGenerator:

def __init__(self, xml_name):

self.doc = Dom.Document()

self.xml_name = xml_name

def createNode(self, node_name):

return self.doc.createElement(node_name)

def addNode(self, node, prev_node = None):

cur_node = node

if prev_node is not None:

prev_node.appendChild(cur_node)

else:

self.doc.appendChild(cur_node)

return cur_node

def setNodeAttr(self, node, att_name, value):

cur_node = node

cur_node.setAttribute(att_name, value)

def setNodeValue(self, cur_node, value):

node_data = self.doc.createTextNode(value)

cur_node.appendChild(node_data)

def genXml(self):

f = open(self.xml_name, "w")

f.write(self.doc.toprettyxml(indent = "\t", newl = "\n", encoding = "utf-8"))

f.close()

if __name__ == "__main__":

myXMLGenerator = XMLGenerator("book_store.xml")

#xml root node

node_book_store = myXMLGenerator.createNode("book_store")

myXMLGenerator.setNodeAttr(node_book_store, "name", "new hua")

myXMLGenerator.setNodeAttr(node_book_store, "website", "CODEGO.net")

myXMLGenerator.addNode(node = node_book_store)

#book01

node_book_01 = myXMLGenerator.createNode("book")

node_book_01_name = myXMLGenerator.createNode("name")

myXMLGenerator.setNodeValue(node_book_01_name, "Hamlet")

myXMLGenerator.addNode(node_book_01_name, node_book_01)

node_book_01_author = myXMLGenerator.createNode("author")

myXMLGenerator.setNodeValue(node_book_01_author, "William Shakespeare")

myXMLGenerator.addNode(node_book_01_author, node_book_01)

node_book_01_price = myXMLGenerator.createNode("price")

myXMLGenerator.setNodeValue(node_book_01_price, "$20")

myXMLGenerator.addNode(node_book_01_price, node_book_01)

node_book_01_grade = myXMLGenerator.createNode("grade")

myXMLGenerator.setNodeValue(node_book_01_grade, "good")

myXMLGenerator.addNode(node_book_01_grade, node_book_01)

myXMLGenerator.addNode(node_book_01, node_book_store)

#book 02

node_book_02 = myXMLGenerator.createNode("book")

node_book_02_name = myXMLGenerator.createNode("name")

myXMLGenerator.setNodeValue(node_book_02_name, "shuihu")

myXMLGenerator.addNode(node_book_02_name, node_book_02)

node_book_02_author = myXMLGenerator.createNode("author")

myXMLGenerator.setNodeValue(node_book_02_author, "naian shi")

myXMLGenerator.addNode(node_book_02_author, node_book_02)

node_book_02_price = myXMLGenerator.createNode("price")

myXMLGenerator.setNodeValue(node_book_02_price, "$200")

myXMLGenerator.addNode(node_book_02_price, node_book_02)

node_book_02_grade = myXMLGenerator.createNode("grade")

myXMLGenerator.setNodeValue(node_book_02_grade, "good")

myXMLGenerator.addNode(node_book_02_grade, node_book_02)

myXMLGenerator.addNode(node_book_02, node_book_store)

#gen

myXMLGenerator.genXml()

同样这个方法会在本目录下生成一个book_store.xml文件，代码如下：

Hamlet

William Shakespeare

$20

good

shuihu

naian shi

$200

good