XML解析
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原XML文件含有31个省，由于数据太多，只放一个象征性的广东省，其他省结构一致。
<province name="广东省" postcode="440000" > <city name="广州市" postcode="440100" > <area name="荔湾区" postcode="440103" /> <area name="越秀区" postcode="440104" /> <area name="海珠区" postcode="440105" /> <area name="天河区" postcode="440106" /> <area name="白云区" postcode="440111" /> <area name="黄埔区" postcode="440112" /> <area name="番禺区" postcode="440113" /> <area name="花都区" postcode="440114" /> <area name="南沙区" postcode="440115" /> <area name="萝岗区" postcode="440116" /> <area name="增城市" postcode="440183" /> <area name="从化市" postcode="440184" /> </city> <city name="韶关市" postcode="440200" > <area name="武江区" postcode="440203" /> <area name="浈江区" postcode="440204" /> <area name="曲江区" postcode="440205" /> <area name="始兴县" postcode="440222" /> <area name="仁化县" postcode="440224" /> <area name="翁源县" postcode="440229" /> <area name="乳源瑶族自治县" postcode="440232" /> <area name="新丰县" postcode="440233" /> <area name="乐昌市" postcode="440281" /> <area name="南雄市" postcode="440282" /> </city> <city name="深圳市" postcode="440300" > <area name="罗湖区" postcode="440303" /> <area name="福田区" postcode="440304" /> <area name="南山区" postcode="440305" /> <area name="宝安区" postcode="440306" /> <area name="龙岗区" postcode="440307" /> <area name="盐田区" postcode="440308" /> </city> <city name="珠海市" postcode="440400" > <area name="香洲区" postcode="440402" /> <area name="斗门区" postcode="440403" /> <area name="金湾区" postcode="440404" /> </city> <city name="汕头市" postcode="440500" > <area name="龙湖区" postcode="440507" /> <area name="金平区" postcode="440511" /> <area name="濠江区" postcode="440512" /> <area name="潮阳区" postcode="440513" /> <area name="潮南区" postcode="440514" /> <area name="澄海区" postcode="440515" /> <area name="南澳县" postcode="440523" /> </city> <city name="佛山市" postcode="440600" > <area name="禅城区" postcode="440604" /> <area name="南海区" postcode="440605" /> <area name="顺德区" postcode="440606" /> <area name="三水区" postcode="440607" /> <area name="高明区" postcode="440608" /> </city> <city name="江门市" postcode="440700" > <area name="蓬江区" postcode="440703" /> <area name="江海区" postcode="440704" /> <area name="新会区" postcode="440705" /> <area name="台山市" postcode="440781" /> <area name="开平市" postcode="440783" /> <area name="鹤山市" postcode="440784" /> <area name="恩平市" postcode="440785" /> </city> <city name="湛江市" postcode="440800" > <area name="赤坎区" postcode="440802" /> <area name="霞山区" postcode="440803" /> <area name="坡头区" postcode="440804" /> <area name="麻章区" postcode="440811" /> <area name="遂溪县" postcode="440823" /> <area name="徐闻县" postcode="440825" /> <area name="廉江市" postcode="440881" /> <area name="雷州市" postcode="440882" /> <area name="吴川市" postcode="440883" /> </city> <city name="茂名市" postcode="440900" > <area name="茂南区" postcode="440902" /> <area name="茂港区" postcode="440903" /> <area name="电白县" postcode="440923" /> <area name="高州市" postcode="440981" /> <area name="化州市" postcode="440982" /> <area name="信宜市" postcode="440983" /> </city> <city name="肇庆市" postcode="441200" > <area name="端州区" postcode="441202" /> <area name="鼎湖区" postcode="441203" /> <area name="广宁县" postcode="441223" /> <area name="怀集县" postcode="441224" /> <area name="封开县" postcode="441225" /> <area name="德庆县" postcode="441226" /> <area name="高要市" postcode="441283" /> <area name="四会市" postcode="441284" /> </city> <city name="惠州市" postcode="441300" > <area name="惠城区" postcode="441302" /> <area name="惠阳区" postcode="441303" /> <area name="博罗县" postcode="441322" /> <area name="惠东县" postcode="441323" /> <area name="龙门县" postcode="441324" /> </city> <city name="梅州市" postcode="441400" > <area name="梅江区" postcode="441402" /> <area name="梅县" postcode="441421" /> <area name="大埔县" postcode="441422" /> <area name="丰顺县" postcode="441423" /> <area name="五华县" postcode="441424" /> <area name="平远县" postcode="441426" /> <area name="蕉岭县" postcode="441427" /> <area name="兴宁市" postcode="441481" /> </city> <city name="汕尾市" postcode="441500" > <area name="城区" postcode="441502" /> <area name="海丰县" postcode="441521" /> <area name="陆河县" postcode="441523" /> <area name="陆丰市" postcode="441581" /> </city> <city name="河源市" postcode="441600" > <area name="源城区" postcode="441602" /> <area name="紫金县" postcode="441621" /> <area name="龙川县" postcode="441622" /> <area name="连平县" postcode="441623" /> <area name="和平县" postcode="441624" /> <area name="东源县" postcode="441625" /> </city> <city name="阳江市" postcode="441700" > <area name="江城区" postcode="441702" /> <area name="阳西县" postcode="441721" /> <area name="阳东县" postcode="441723" /> <area name="阳春市" postcode="441781" /> </city> <city name="清远市" postcode="441800" > <area name="清城区" postcode="441802" /> <area name="佛冈县" postcode="441821" /> <area name="阳山县" postcode="441823" /> <area name="连山壮族瑶族自治县" postcode="441825" /> <area name="连南瑶族自治县" postcode="441826" /> <area name="清新县" postcode="441827" /> <area name="英德市" postcode="441881" /> <area name="连州市" postcode="441882" /> </city> <city name="东莞市" postcode="441900" > <area name="市辖区" postcode="441901" /> </city> <city name="中山市" postcode="442000" > <area name="市辖区" postcode="442001" /> </city> <city name="潮州市" postcode="445100" > <area name="湘桥区" postcode="445102" /> <area name="潮安县" postcode="445121" /> <area name="饶平县" postcode="445122" /> </city> <city name="揭阳市" postcode="445200" > <area name="榕城区" postcode="445202" /> <area name="揭东县" postcode="445221" /> <area name="揭西县" postcode="445222" /> <area name="惠来县" postcode="445224" /> <area name="普宁市" postcode="445281" /> </city> <city name="云浮市" postcode="445300" > <area name="云城区" postcode="445302" /> <area name="新兴县" postcode="445321" /> <area name="郁南县" postcode="445322" /> <area name="云安县" postcode="445323" /> <area name="罗定市" postcode="445381" /> </city> </province>根据原XML文件结构，构建辅助类。
原结构最小单元是县区，市级由若干县区构成，省又由若干市级构成。
因此构建省类内含市级集合，市内含有县区集合。
public class Provinces { private String provinces_name; private String provinces_postcode; private List<City> city_name; public Provinces(){} public Provinces(String provinces_name,String postcode,List<City> city_name){ this.provinces_name=provinces_name; this.provinces_postcode=postcode; this.city_name=city_name; } @Override public String toString() { return "Provinces [provinces_name=" + provinces_name + ", provinces_postcode=" + provinces_postcode + ", city_name=" + city_name + "]"; }}public class City { private String city_name; private String city_postcode; private List<Area> area; public City(){} public City(String name,String city_postcode,List<Area> area){ this.city_name=name; this.city_postcode=city_postcode; this.area=area; } @Override public String toString() { return "City [city_name=" + city_name + ", city_postcode=" + city_postcode + ", area=" + area + "]"; }}public class Area { private String area_name; private String area_postcode; public Area(){} public Area(String area_name,String area_postcode){ this.area_name=area_name; this.area_postcode=area_postcode; } @Override public String toString() { return "Area [area_name=" + area_name + ", area_postcode=" + area_postcode + "]"; }}以下是DOM解析片段：
public class DOMXML { public static void main(String[] args){ List<Provinces> provinces_arrayList=null; //实例化一个DOM解析器工厂对象 DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance(); try { //根据工厂对象得到解析器对象 DocumentBuilder db=dbf.newDocumentBuilder(); InputStream is=new FileInputStream(new File("d://Resource/city.xml")); //指定要解析的XML文件，并将其挂在一个文档上 Document document=db.parse(is); //根据文档对象得到根节点对象 Element root=document.getDocumentElement(); //根据标签名获取指定节点的集合储存到NodeList对象中 NodeList provinces_nodeList=root.getElementsByTagName("province"); //获取集合中的节点个数 int len=provinces_nodeList.getLength(); //TAG PROVINCE_BEGIN provinces_arrayList=new ArrayList<>(); for(int i=0;i<len;i++){ //根据索引位获取指定位置的Node Node province_node=provinces_nodeList.item(i); //为了使用Eelment的 String getAttribute(String name)根据属性名获取属性值的方法，转型 Element province_element=(Element) province_node; String province_name=province_element.getAttribute("name"); String province_postcode=province_element.getAttribute("postcode"); NodeList child_node=province_element.getElementsByTagName("city"); //TAG CITY_BEGIN List<City> city_arrayList=new ArrayList<>(); for(int j=0;j<child_node.getLength();j++){ Node city_node=child_node.item(j); Element city_element=(Element)city_node; String city_name=city_element.getAttribute("name"); String city_postcode=city_element.getAttribute("postcode"); NodeList area_list=city_element.getElementsByTagName("area"); //TAG AREA_START List<Area> area_arrayList=new ArrayList<>(); for(int k=0;k<area_list.getLength();k++){ Node area_node=area_list.item(k); Element area_element=(Element) area_node; String area_name=area_element.getAttribute("name"); String area_postcode=area_element.getAttribute("postcode"); Area area=new Area(area_name,area_postcode); area_arrayList.add(area); } //TAG AREA_END City city=new City(city_name,city_postcode,area_arrayList); city_arrayList.add(city); } //TAG CITY_END Provinces provinces_=new Provinces(province_name,province_postcode,city_arrayList); provinces_arrayList.add(provinces_); } //TAG PROVINCE_END } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }}PULL解析，因为PULL解析时遇到标签时要实例化对象，因此需要提供setter和getter方法。
public class PULLXML { public static void main(String[] args){ List<Provinces> province_list=new ArrayList<>(); List<City> city_list=null; List<Area> area_list=null; Provinces province=null; City city=null; Area area=null; try { //获取Pull解析器工厂对象 XmlPullParserFactory xmlPullParserFactory=XmlPullParserFactory.newInstance(); //根据工厂对象获取Pull对象 XmlPullParser xmlPullParser=xmlPullParserFactory.newPullParser(); //指定解析文件与编码表 InputStream is=new FileInputStream(new File("d://Resource/city.xml")); xmlPullParser.setInput(is,"utf-8"); //得到时间对象值 int eventType=xmlPullParser.getEventType(); //只要没有解析到xml结尾则一直继续 while(eventType!=XmlPullParser.END_DOCUMENT){ switch(eventType){ case XmlPullParser.START_DOCUMENT: break; case XmlPullParser.START_TAG: String st=xmlPullParser.getName(); if("province".equals(st)){ province=new Provinces(); String province_name=xmlPullParser.getAttributeValue(null,"name"); String province_postcode=xmlPullParser.getAttributeValue(null, "postcode"); province.setProvinces_name(province_name); province.setProvinces_postcode(province_postcode); city_list=new ArrayList<>(); } if("city".equals(st)){ city=new City(); String city_name=xmlPullParser.getAttributeValue(null, "name"); String city_postcode=xmlPullParser.getAttributeValue(null, "postcode"); city.setCity_name(city_name); city.setCity_postcode(city_postcode); area_list=new ArrayList<>(); } if("area".equals(st)){ area=new Area(); String area_name=xmlPullParser.getAttributeValue(null,"name"); String area_postcode=xmlPullParser.getAttributeValue(null, "postcode"); area.setArea_name(area_name); area.setArea_postcode(area_postcode); } break; case XmlPullParser.TEXT: break; case XmlPullParser.END_TAG: String str=xmlPullParser.getName(); if("province".equals(str)){ province.setCity_name(city_list); province_list.add(province); } if("city".equals(str)){ city.setArea(area_list); city_list.add(city); } if("area".equals(str)){ area_list.add(area); } break; } eventType=xmlPullParser.next(); } FileOutputStream fos=new FileOutputStream(new File("d:he.txt")); fos.write(province_list.toString().getBytes()); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }} 0 0
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