数据解析--sax解析

  1 //实例化一个DefaultHandler对象(StudentHandler是一事件处理器) 
  2 
  3 
  4 public class StudentHandler extends DefaultHandler { 
  5 private List<Student> mstudent; 
  6 private String mtagname; 
  7 private Student student; 
  8 
  9 
 10 
 11 public StudentHandler() { 
 12 super(); 
 13 // TODO Auto-generated constructor stub 
 14 } 
 15 public StudentHandler(List<Student> mstudent) { 
 16 super(); 
 17 this.mstudent = mstudent; 
 18 } 
 19 //开始解析文档 
 20 @Override 
 21 public void startDocument() throws SAXException { 
 22 
 23 super.startDocument(); 
 24 } 
 25    //解析xml文档结尾 
 26 @Override 
 27 public void endDocument() throws SAXException { 
 28 
 29 super.endDocument(); 
 30 } 
 31 
 32 //解析开始标签 
 33 //元素节点 
 34 @Override 
 35 public void startElement(String uri, String localName, String qName, 
 36 Attributes attributes) throws SAXException { 
 37             this.mtagname = localName; 
 38             if("student".equals(mtagname)){ 
 39             student = new Student(); 
 40             student .setId(Integer.valueOf(attributes.getValue("id"))); 
 41             
 42             } 
 43             else if("age".equals(mtagname)){ 
 44             student .setAge(Integer.valueOf(attributes.getValue(0))); 
 45             } 
 46 super.startElement(uri, localName, qName, attributes); 
 47 } 
 48 //解析标签 结束 
 49 @Override 
 50 public void endElement(String uri, String localName, String qName) 
 51 throws SAXException { 
 52       this.mtagname= localName; 
 53       if("student".equals(mtagname)){ 
 54     mstudent.add(student); 
 55     student = null; 
 56       } 
 57       mtagname = ""; 
 58 Log.i("TAG", "infor"); 
 59       super.endElement(uri, localName, qName); 
 60 
 61 } 
 62 //解析文本标签 
 63 @Override 
 64 public void characters(char[] ch, int start, int length) 
 65 throws SAXException { 
 66           String name = new String (ch,start,length); 
 67           if(!name.trim().equals("")&&"name".equals(mtagname)){ 
 68           student.setName(name); 
 69           } 
 70           Log.i("TAG", "infor"); 
 71 super.characters(ch, start, length); 
 72 } 
 73 } 
 74 *****************************sax解析************* 
 75 //student是一个实体类，有name，age，参数和构造方法，toString输出 
 76 
 77 public class SaxParserActivity extends Activity { 
 78 private TextView mtextview; 
 79 private ListView mlistview; 
 80 @Override 
 81 protected void onCreate(Bundle savedInstanceState) { 
 82 
 83 super.onCreate(savedInstanceState); 
 84 setContentView(R.layout.domparser); 
 85 mtextview = (TextView) findViewById(R.id.textView1); 
 86 mlistview = (ListView) findViewById(R.id.listView1); 
 87 mtextview.setText("sax解析xml"); 
 88 
 89 List<Student> list = parser(); 
 90 ArrayAdapter<Student> adapter = new ArrayAdapter<Student>(this,android.R.layout.simple_expandable_list_item_1,list); 
 91 mlistview.setAdapter(adapter); 
 92 
 93 } 
 94 private List<Student> parser() { 
 95 List <Student> list = new ArrayList<Student>(); 
 96 try { 
 97 // 获取工厂 
 98 SAXParserFactory sax  = SAXParserFactory.newInstance(); 
 99 //获取sax解析器 
100         SAXParser sf = sax.newSAXParser(); 
101 //获取事件源 
102 XMLReader xmlreader = sf.getXMLReader(); 
103 //创建事件处理器 
104 StudentHandler studenthandle = new StudentHandler(list); 
105 //  将事件处理器设置到事件源 
106 xmlreader.setContentHandler(studenthandle); 
107 //触发解析事件，读取raw下面的文档 
108 xmlreader.parse(new InputSource(getResources().openRawResource(R.raw.student))); 
109 } catch (Exception e) { 
110 // TODO Auto-generated catch block 
111 Log.i("TAG",""+e.getMessage()); 
112 } 
113 return list; 
114 } 
115 }