在Android中极力推荐的xmlpull方式解析xml。
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为什么 STAX 解析方式 效率 好于 SAX ？
1、SAX 无选择性的，所有事件都会处理 解析方式，Stax 由用户控制需要处理事件类型
2、在使用Stax进行数据解析时，随时终止解析
环境：
xmlpull_1_1_3_4c.jar
http://www.xmlpull.org/ xmlpull
XML文件:
张三
男
18
zhangsan@163.com
1987-06-08
好学生
李四
女
18
lisi@163.com
1987-06-08
好学生
小王
男
18
xiaowang@163.com
1987-06-08
好学生
小张
男
18
xiaozhang@163.com
1987-06-08
好学生
小明
男
18
xiaoming@163.com
1987-06-08
好学生
XML对应的实体文件:
public class Student {
private int id; private int group; private String name; private String sex; private int age; private String email; private String memo; private String birthday; public int getId() { return id;
} public void setId(int id) { this.id = id;
} public int getGroup() { return group;
} public void setGroup(int group) { this.group = group;
} public String getName() { return name;
} public void setName(String name) { this.name = name;
} public String getSex() { return sex;
} public void setSex(String sex) { this.sex = sex;
} public int getAge() { return age;
} public void setAge(int age) { this.age = age;
} public String getEmail() { return email;
} public void setEmail(String email) { this.email = email;
} public String getMemo() { return memo;
} public void setMemo(String memo) { this.memo = memo;
} public String getBirthday() { return birthday;
} public void setBirthday(String birthday) { this.birthday = birthday;
}
}
Pull解析代码
public class PullParseXml {
public List PullParseXML(){
List list=null;
Student student = null;
//构建XmlPullParserFactory
try {
XmlPullParserFactory pullParserFactory=XmlPullParserFactory.newInstance(); //获取XmlPullParser的实例
XmlPullParser xmlPullParser=pullParserFactory.newPullParser(); //设置输入流 xml文件
xmlPullParser.setInput(Thread.currentThread().getContextClassLoader().getResourceAsStream("Student.xml"), "UTF-8");
//开始
int eventType=xmlPullParser.getEventType();
try { while(eventType!=XmlPullParser.END_DOCUMENT){
String nodeName=xmlPullParser.getName(); switch (eventType) { //文档开始
case XmlPullParser.START_DOCUMENT:
list=new ArrayList(); break; //开始节点
case XmlPullParser.START_TAG: //判断如果其实节点为student
if("student".equals(nodeName)){ //实例化student对象
student=new Student(); //设置Id属性
student.setId(Integer.parseInt(xmlPullParser.getAttributeValue(0))); //设置Group属性
student.setGroup(Integer.parseInt(xmlPullParser.getAttributeValue(1)));
}else if("name".equals(nodeName)){ //设置name student.setName(xmlPullParser.nextText());
}else if("sex".equals(nodeName)){ //设置sex student.setSex(xmlPullParser.nextText());
}else if("age".equals(nodeName)){ //设置age student.setAge(Integer.parseInt(xmlPullParser.nextText()));
}else if("email".equals(nodeName)){ //设置email student.setEmail(xmlPullParser.nextText());
}else if("birthday".equals(nodeName)){ //设置birthday student.setBirthday(xmlPullParser.nextText());
}else if("memo".equals(nodeName)){ //设置memo属性 student.setMemo(xmlPullParser.nextText());
} break; //结束节点
case XmlPullParser.END_TAG: if("student".equals(nodeName)){
list.add(student);
student=null;
} break; default: break;
}
eventType=xmlPullParser.next();
}
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} catch (XmlPullParserException e) {
e.printStackTrace();
} return list;
}
public static void main(String[] args) {
List list=new PullParseXml().PullParseXML(); for(Student student:list){
System.out.println("id:"+student.getId()+"\tgroup:"+student.getGroup()+"\tname:"+student.getName()+"\tsex:"+student.getSex()+"\tage:"+student.getAge()+"\temail:"+student.getEmail()+"\tbirthday:"+student.getBirthday()+"\tmemo:"+student.getMemo());
}
}
}
Event_Type事件返回的事件代码：
public static final java.lang.String NO_NAMESPACE = "";
public static final int START_DOCUMENT = 0;
public static final int END_DOCUMENT = 1;
public static final int START_TAG = 2;
public static final int END_TAG = 3;
public static final int TEXT = 4;
public static final int CDSECT = 5;
public static final int ENTITY_REF = 6;
public static final int IGNORABLE_WHITESPACE = 7;
public static final int PROCESSING_INSTRUCTION = 8;
public static final int COMMENT = 9;
public static final int DOCDECL = 10;
对XML数据通过PULL解析器进行CURD示意图：
当前题目：XML解析之PULL
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