xml文件解析和序列化

Posted 2020-07-21 凤雏小呆

 XmlPullParser parser = Xml.newPullParser(); //创建一个XmlPullParser实例  
        parser.setInput(is, "UTF-8");               //设置输入流 并指明编码方式  
  
        int eventType = parser.getEventType();  
        while (eventType != XmlPullParser.END_DOCUMENT) {  
            switch (eventType) {  
            case XmlPullParser.START_DOCUMENT:  
                books = new ArrayList<Book>();  
                break;  
            case XmlPullParser.START_TAG:  
                if (parser.getName().equals("book")) {  
                    book = new Book();  
                } else if (parser.getName().equals("id")) {  
                    eventType = parser.next();  
                    book.setId(Integer.parseInt(parser.getText()));  
                } else if (parser.getName().equals("name")) {  
                    eventType = parser.next();  
                    book.setName(parser.getText());  
                } else if (parser.getName().equals("price")) {  
                    eventType = parser.next();  
                    book.setPrice(Float.parseFloat(parser.getText()));  
                }  
                break;  
            case XmlPullParser.END_TAG:  
                if (parser.getName().equals("book")) {  
                    books.add(book);  
                    book = null;      
                }  
                break;  
            }  
            eventType = parser.next();  
        }  
        return books;  
    }  
      
    @Override  
    public String serialize(List<Book> books) throws Exception {  
//      XmlPullParserFactory factory = XmlPullParserFactory.newInstance();  
//      XmlSerializer serializer = factory.newSerializer();  
          
        XmlSerializer serializer = Xml.newSerializer(); //创建一个XmlSerializer实例  
        StringWriter writer = new StringWriter();  
        serializer.setOutput(writer);   //设置输出方向为writer  
        serializer.startDocument("UTF-8", true);  
        serializer.startTag("", "books");  
        for (Book book : books) {  
            serializer.startTag("", "book");  
            serializer.attribute("", "id", book.getId() + "");  
              
            serializer.startTag("", "name");  
            serializer.text(book.getName());  
            serializer.endTag("", "name");  
              
            serializer.startTag("", "price");  
            serializer.text(book.getPrice() + "");  
            serializer.endTag("", "price");  
              
            serializer.endTag("", "book");  
        }  
        serializer.endTag("", "books");  
        serializer.endDocument();  
          
        return writer.toString();  
    }  
}  

　　转载：http://blog.csdn.net/liuhe688/article/details/6415593

1.  XmlPullParser parser = Xml.newPullParser(); //由android.util.Xml创建一个XmlPullParser实例  
2.         parser.setInput(is, "UTF-8");               //设置输入流 并指明编码方式  
3.   
4.         int eventType = parser.getEventType();  
5.         while (eventType != XmlPullParser.END_DOCUMENT) {  
6.             switch (eventType) {  
7.             case XmlPullParser.START_DOCUMENT:  
8.                 books = new ArrayList<Book>();  
9.                 break;  
10.             case XmlPullParser.START_TAG:  
11.                 if (parser.getName().equals("book")) {  
12.                     book = new Book();  
13.                 } else if (parser.getName().equals("id")) {  
14.                     eventType = parser.next();  
15.                     book.setId(Integer.parseInt(parser.getText()));  
16.                 } else if (parser.getName().equals("name")) {  
17.                     eventType = parser.next();  
18.                     book.setName(parser.getText());  
19.                 } else if (parser.getName().equals("price")) {  
20.                     eventType = parser.next();  
21.                     book.setPrice(Float.parseFloat(parser.getText()));  
22.                 }  
23.                 break;  
24.             case XmlPullParser.END_TAG:  
25.                 if (parser.getName().equals("book")) {  
26.                     books.add(book);  
27.                     book = null;      
28.                 }  
29.                 break;  
30.             }  
31.             eventType = parser.next();  
32.         }  
33.         return books;  
34.     }  
35.       
36.     @Override  
37.     public String serialize(List<Book> books) throws Exception {  
38. //      XmlPullParserFactory factory = XmlPullParserFactory.newInstance();  
39. //      XmlSerializer serializer = factory.newSerializer();  
40.           
41.         XmlSerializer serializer = Xml.newSerializer(); //由android.util.Xml创建一个XmlSerializer实例  
42.         StringWriter writer = new StringWriter();  
43.         serializer.setOutput(writer);   //设置输出方向为writer  
44.         serializer.startDocument("UTF-8", true);  
45.         serializer.startTag("", "books");  
46.         for (Book book : books) {  
47.             serializer.startTag("", "book");  
48.             serializer.attribute("", "id", book.getId() + "");  
49.               
50.             serializer.startTag("", "name");  
51.             serializer.text(book.getName());  
52.             serializer.endTag("", "name");  
53.               
54.             serializer.startTag("", "price");  
55.             serializer.text(book.getPrice() + "");  
56.             serializer.endTag("", "price");  
57.               
58.             serializer.endTag("", "book");  
59.         }  
60.         serializer.endTag("", "books");  
61.         serializer.endDocument();  
62.           
63.         return writer.toString();  
64.     }  
65. }