Python如何用dom模块生成XML文

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：

<?xml version="1.0" encoding="utf-8"?>  

<book_store name="newhua" website="CODEGO.net">  

    <book1>  

        <name>hamlet</name>  

        <author>William Shakespeare</author>  

    </book1>  

</book_store>

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：

<?xml version="1.0" encoding="utf-8"?>  

<book_store name="new hua" website="CODEGO.net">  

    <book>  

        <name>Hamlet</name>  

        <author>William Shakespeare</author>  

        <price>$20</price>  

        <grade>good</grade>  

    </book>  

    <book>  

        <name>shuihu</name>  

        <author>naian shi</author>  

        <price>$200</price>  

        <grade>good</grade>  

    </book>  

</book_store>