XML 文件解析 SAXParserFactory

1、XML文件userinfo.xml  可以放到assets文件夹下或者包下面

<?xml version="1.0" encoding="UTF-8"?>
<admins>
<admin id="1">
<name>于美光</name>
<age>25</age>
<address>NanJing</address>
<phone>18855529592</phone>
</admin>
<admin id="2">
<name>于美光</name>
<age>25</age>
<address>NanJing</address>
<phone>18855529592</phone>
</admin>
</admins>

2、新建一个与XML文件对应的类User.java
public class User {
private int id;
private String name;
private String address;
private int age;
private String phone;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}

}


3.工具类XmlParser 继承DefaultHandler
public class XmlParser extends DefaultHandler{

private String tagName = null;

private User user = null;

public User getUser() {
return user;
}

public void setUser(User user) {
this.user = user;
}

@Override
public void startDocument() throws SAXException {
user = new User();
}

@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
tagName = localName;
if ("admin".equals(tagName)) {
user.setId(Integer.parseInt(attributes.getValue(0)));
}
super.startElement(uri, localName, qName, attributes);
}

@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (tagName != null) {
if (tagName.equals("name")) {
String str = new String(ch,start,length);
user.setName(str);
}else if(tagName.equals("age")){
String str = new String(ch,start,length);
user.setAge(Integer.parseInt(str));
}else if(tagName.equals("address")){
String str = new String(ch,start,length);
user.setAddress(str);
}else if(tagName.equals("phone")){
String str = new String(ch,start,length);
user.setPhone(str);
}
}
super.characters(ch, start, length);
}

@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
tagName = null;
super.endElement(uri, localName, qName);
}

@Override
public void endDocument() throws SAXException {
super.endDocument();
}

}

4.使用工具类进行解析
public class MainActivity extends Activity {
private User user;
private TextView txtUser;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
parse();
} catch (IOException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
}
txtUser = (TextView)findViewById(R.id.txtUser);
txtUser.setText(Html.fromHtml("<b>ID:</b>"+user.getId()+"<b>NAME:</b>"+
"<b>AGE:</b>"+user.getAge()+"<b>Address:</b>"+user.getAddress()+
"<b>PHONE:</b>PHPNE"+"=+"+user.getPhone()));
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

private void parse() throws IOException, ParserConfigurationException, SAXException{
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XmlParser parser = new XmlParser();
// InputStream is = this.getResources().getAssets().open("userinfo.xml");//资源文件夹下面的
InputStream is = this.getClass().getResourceAsStream("userinfo.xml");//和该类同一包下面
sp.parse(is, parser);
user = parser.getUser();
}
}