Android(安卓)开发中使用SAX解析xml小结
16lz
2022-07-24
1. 解析类:
继承和重写DefaultHandler 。
import java.util.ArrayList;import java.util.List;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;import android.util.Log; public class EmployeeHandler extends DefaultHandler { private static final String TAG = "xml"; private List<Employee> data; private Employee employee; private String preTAG; private static final String _Employee="Employee"; private static final String _name="name"; private static final String _time="SignInTime"; private static final String _phoneNumber = "phoneNumber"; public EmployeeHandler(List<Employee> data){ super(); this.data = data; } //解析文档头 @Override public void startDocument() throws SAXException {
//新建一个数组链表,元素为对象,用来存放xml解析到得数据 if(data==null) data=new ArrayList<Employee>(); Log.d(TAG, "startDocument ------- :"); super.startDocument(); } @Override public void endDocument() throws SAXException { Log.d(TAG, "endDocument ------- :"); super.endDocument(); } //文档结束标签 @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { Log.d(TAG, "startElement ------- :localName :"+localName); preTAG = localName; if(_Employee.equalsIgnoreCase(localName)){
//新建用来存储标签之间的值的对象 employee=new Employee(); } super.startElement(uri, localName, qName, attributes); } @Override public void endElement(String uri, String localName, String qName) throws SAXException { preTAG = ""; if(_Employee.equalsIgnoreCase(localName)){ data.add(employee); Log.d(TAG, "endElement ------- :һ "); } super.endElement(uri, localName, qName); } //主要解析放在这里 @Override public void characters(char[] ch, int start, int length) throws SAXException { String info = new String(ch,start,length); Log.d(TAG, "characters ------- : property value : " +info);
//将标签中之间的值存入对象字段 if(preTAG.equalsIgnoreCase(_name)){ employee.setName(info); } else if (preTAG.equalsIgnoreCase(_phoneNumber)) { employee.setPhoneNumber(info); }else if(preTAG.equalsIgnoreCase(_time)){ employee.setTime(info); } super.characters(ch, start, length); } public List<Employee> getdata(){ return data; }}
2.EmployeeXmlHelper类:
封装了解析所需的前置、后置处理逻辑成工具类,方便调用。
import java.io.ByteArrayInputStream;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.InputSource;import org.xml.sax.XMLReader; public class EmployeeXmlHelper {public static List<Employee> parserXML(String str){if(null == str){return null;} String _str = str.trim(); List<Employee> data = new ArrayList<Employee>(); SAXParserFactory factory=SAXParserFactory.newInstance(); XMLReader reader; try { byte[] bytes = _str.getBytes(); ByteArrayInputStream bis = new ByteArrayInputStream (bytes); InputSource is = new InputSource( (InputStream)bis); is.setEncoding("utf-8"); reader = factory.newSAXParser().getXMLReader(); reader.setContentHandler(new EmployeeHandler(data)); reader.parse(is); } catch (Exception e) { e.printStackTrace(); } return data; }}
3.model类package com.swift.phoneAttendance.model;import java.io.Serializable;public class Employee implements Serializable { String name = null; String phoneNumber = null; String time = null; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPhoneNumber() { return phoneNumber; } public void setPhoneNumber(String phoneNumber) { this.phoneNumber = phoneNumber; } public String getTime() { return time; } public void setTime(String time) { this.time = time; }}
4.客户端调用方式:
xml内容如下:
<<Result> <Status>True<Status> <Employee> <Name></Name> <PhoneNumber></PhoneNumber> </ Employee> <Employee></ Result>
调用解析:
private List<Employee> data = EmployeeXmlHelper.parserXML(xml);
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