Android 开发中使用SAX解析xml小结

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;
}
}

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);