本文实例讲述了Python实现对象转换为xml的方法。分享给大家供大家参考，具体如下：
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# -*- coding:UTF-8 -*-'''''Created on 2010-4-20@author: 忧里修斯'''import xml.etree.ElementTree as ETimport xml.dom.minidom as minidomfrom addrbook.domain import Personclass Converter(object): ''''' 实现Python对象与xml之间的相互转换 ''' root = None#根节点 def __init__(self): pass @staticmethod def createRoot(rootTag): ''''' 创建根节点 ''' root = ET.Element(rootTag) return root @staticmethod def getXmlString(element,defaultEncoding='utf-8'): ''''' 根据节点返回格式化的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:传入的节点不能正确转换为xml，请检查传入的节点是否正确' return '' @staticmethod def classToElements(classobj,rootTag=None): ''''' 根据传入的对象的实例，根据对象的属性生成节点，返回由节点组成的列表 classobj：对象的实例 rootTag：根节点名称 ''' attrs = None#保存对象的属性集 elelist = []#节点列表 try: attrs = classobj.__dict__.keys()#获取该对象的所有属性(即成员变量) except: print 'classToElements:传入的对象非法，不能正确获取对象的属性' if attrs != None and len(attrs) > 0:#属性存在 for attr in attrs: attrvalue = getattr(classobj, attr)#属性值 #属性节点 attrE = ET.Element(attr) attrE.text = attrvalue #加入节点列表 elelist.append(attrE) return elelist @staticmethod def classToXML(classobj,rootTag=None): ''''' Python自定义模型类转换成xml，转换成功返回的是xml根节点，否则返回None classobj：对象的实例 rootTag：根节点名称 ''' try: classname = classobj.__class__.__name__ #类名 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:转换出错，请检查的传入的对象是否正确' return None @staticmethod def collectionToXML(listobj,rootTag='list'): ''''' 集合（列表、元组、字典）转换为xml，转换成功返回的是xml根节点，否则返回None ''' try: classname = listobj.__class__.__name__ #类名 root = Converter.createRoot(rootTag) if isinstance(listobj, list) or isinstance(listobj, tuple):#列表或元组 if len(listobj) >= 0: for obj in listobj:#迭代列表中的对象 itemE = Converter.classToXML(obj) root.append(itemE) elif isinstance(listobj, dict):#字典 if len(listobj) >= 0: for key in listobj:#迭代字典中的对象 obj = listobj[key] itemE = Converter.classToXML(obj) itemE.set('key', key) root.append(itemE) else: print 'listToXML：转换错误，传入的对象：'+classname+'不是集合类型' return root except: print 'collectionToXML：转换错误，集合转换成xml失败' return Noneif __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) |
希望本文所述对大家Python程序设计有所帮助。
