本文實例講述了Python實現對象轉換為xml的方法。分享給大家供大家參考，具體如下：
# -*- coding:UTF-8 -*-
'''''
Created on 2010-4-20
@author: 憂里修斯
'''
import xml.etree.ElementTree as ET
import xml.dom.minidom as minidom
from addrbook.domain import Person
class Converter(object):
'''''
實現Python對象與xml之間的相互轉換
'''
root = None#根節點
def __init__(self):
pass
@staticmethod
def createRoot(rootTag):
'''''
創建根節點
'''
root = ET.Element(rootTag)
return root
@staticmethod
def getXmlString(element,defaultEncoding='utf-8'):
'''''
根據節點返回格式化的xml字符串
'''
try:
rough_string = ET.tostring(element, defaultEncoding)
reparsed = minidom.parseString(rough_string)
return reparsed.toprettyxml(indent=" " , encoding=defaultEncoding)
except:
print 'getXmlString:傳入的節點不能正確轉換為xml，請檢查傳入的節點是否正確'
return ''
@staticmethod
def classToElements(classobj,rootTag=None):
'''''
根據傳入的對象的實例，根據對象的屬性生成節點，返回由節點組成的列表
classobj：對象的實例
rootTag：根節點名稱
'''
attrs = None#保存對象的屬性集
elelist = []#節點列表
try:
attrs = classobj.__dict__.keys()#獲取該對象的所有屬性(即成員變量)
except:
print 'classToElements:傳入的對象非法，不能正確獲取對象的屬性'
if attrs != None and len(attrs) > 0:#屬性存在
for attr in attrs:
attrvalue = getattr(classobj, attr)#屬性值
#屬性節點
attrE = ET.Element(attr)
attrE.text = attrvalue
#加入節點列表
elelist.append(attrE)
return elelist
@staticmethod
def classToXML(classobj,rootTag=None):
'''''
Python自定義模型類轉換成xml，轉換成功返回的是xml根節點，否則返回None
classobj：對象的實例
rootTag：根節點名稱
'''
try:
classname = classobj.__class__.__name__ #類名
if rootTag != None:
root = Converter.createRoot(rootTag)
else:
root = Converter.createRoot(classname)
elelist = Converter.classToElements(classobj, rootTag)
for ele in elelist:
root.append(ele)
return root
except:
print 'classToXML:轉換出錯，請檢查的傳入的對象是否正確'
return None
@staticmethod
def collectionToXML(listobj,rootTag='list'):
'''''
集合(列表、元組、字典)轉換為xml，轉換成功返回的是xml根節點，否則返回None
'''
try:
classname = listobj.__class__.__name__ #類名
root = Converter.createRoot(rootTag)
if isinstance(listobj, list) or isinstance(listobj, tuple):#列表或元組
if len(listobj) >= 0:
for obj in listobj:#迭代列表中的對象
itemE = Converter.classToXML(obj)
root.append(itemE)
elif isinstance(listobj, dict):#字典
if len(listobj) >= 0:
for key in listobj:#迭代字典中的對象
obj = listobj[key]
itemE = Converter.classToXML(obj)
itemE.set('key', key)
root.append(itemE)
else:
print 'listToXML：轉換錯誤，傳入的對象：'+classname+'不是集合類型'
return root
except:
print 'collectionToXML：轉換錯誤，集合轉換成xml失敗'
return None
if __name__ == '__main__':
p1 = Person('dredfsam','男','133665')
p2 = Person('dream','女','r')
p3 = Person('得分','男','sdf')
personList = {}
personList['p1']= p1
personList['p2']= p2
personList['p3']= p3
# personList.append(p1)
# personList.append(p2)
# personList.append(p3)
root = Converter.collectionToXML(personList)
print Converter.getXmlString(root)
# plist = (p1,p2,p3)#{'name':'sdf'}
# print type(plist)
# print type(plist),isinstance(plist, list)
PS：這里再為大家提供幾款關于xml操作的在線工具供大家參考使用：
希望本文所述對大家Python程序設計有所幫助。
