Java-->xml的pull解析

--> pull解析器是android内置的解析器，解析原理与sax类似

--> xml文件student.xml:

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!-- 有三个学生：姓名、年龄、性别。把这三个学生的信息用xml表示出来 -->
 3 <students>
 4     <student name="zhangsan">
 5         <age>18</age>
 6         <sex>男</sex>
 7     </student>
 8     <student name="lisi">
 9         <age>22</age>
10         <sex>女</sex>
11     </student>
12     <student name="wangwu">
13         <age>20</age>
14         <sex>男</sex>
15     </student>
16 </students>

--> Student 类:

 1 package com.dragon.java.pullparse;
 2 
 3 public class Student {
 4     private String name;
 5     private int age;
 6     private String sex;
 7 
 8     public Student() {
 9         super();
10     }
11 
12     public Student(String name, int age, String sex) {
13         super();
14         this.name = name;
15         this.age = age;
16         this.sex = sex;
17     }
18 
19     public String getName() {
20         return name;
21     }
22 
23     public void setName(String name) {
24         this.name = name;
25     }
26 
27     public int getAge() {
28         return age;
29     }
30 
31     public void setAge(int age) {
32         this.age = age;
33     }
34 
35     public String getSex() {
36         return sex;
37     }
38 
39     public void setSex(String sex) {
40         this.sex = sex;
41     }
42 
43     @Override
44     public String toString() {
45         return "Student [name=" + name + ", age=" + age + ", sex=" + sex + "]";
46     }
47 
48 }
Student

--> Test 测试类：

 1 package com.dragon.java.pullparse;
 2 
 3 import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
 4 import static org.xmlpull.v1.XmlPullParser.END_TAG;
 5 import static org.xmlpull.v1.XmlPullParser.START_TAG;
 6 import static org.xmlpull.v1.XmlPullParser.TEXT;
 7 
 8 import java.io.FileReader;
 9 import java.io.IOException;
10 import java.util.ArrayList;
11 import java.util.List;
12 
13 import org.xmlpull.v1.XmlPullParser;
14 import org.xmlpull.v1.XmlPullParserException;
15 import org.xmlpull.v1.XmlPullParserFactory;
16 
17 /*
18  * pull解析器
19  */
20 public class Test {
21     public static void main(String[] args) throws XmlPullParserException,
22             IOException {
23         List<Student> list = null;
24         Student student = null;
25         // 1、获取一个XmlPullParser解析器
26         XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); // 调用解析器工厂的静态方法，创建一个解析器工厂
27         XmlPullParser parser = factory.newPullParser(); // 创建一个pull解析器
28         parser.setInput(new FileReader(
29                 "D:/workspace/08-25/src/com/dragon/java/xml/students.xml")); // 设置一个输入流，告诉要解析的xml数据的来源
30         int event = parser.getEventType(); // 获取当前事件的类型
31         while (event != END_DOCUMENT) { // 当碰到文档结束的时候，结束循环
32             switch (event) {
33             case START_TAG:
34                 String tag = parser.getName();
35                 if (tag.equals("students")) {
36                     list = new ArrayList<>();
37                 } else if (tag.equals("student")) {
38                     student = new Student();
39                     student.setName(parser.getAttributeValue(null, "name")); // 参数1：是命名空间，如果命名空间，则传入null。参数2：属性的名字
40                     list.add(student);
41                 } else if (tag.equals("age")) {
42                     student.setAge(Integer.parseInt(parser.nextText())); // 获取当前事件后面的text事件，text的值
43                 } else if (tag.equals("sex")) {
44                     student.setSex(parser.nextText());
45                 }
46                 break;
47             case END_TAG:
48                 break;
49             case TEXT:
50                 break;
51             default:
52                 break;
53             }
54             event = parser.next();
55         }
56         for (Student student2 : list) {
57             System.out.println(student2);
58         }
59     }
60 }

--> 也是蛮麻烦的...

posted on 2016-08-25 13:26  西门吃雪  阅读(681)  评论(0)  编辑  收藏  举报

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