Go语言视频零基础入门到精通

javalearner

创建一个java类MyContentHandler.java继承DefaultHandler.java（ContentHandler.java的实现类）读取XML中的数据：

2. package com.zhangjie.xml;
3. import org.xml.sax.Attributes;
4. import org.xml.sax.SAXException;
5. import org.xml.sax.helpers.DefaultHandler;
6. public class MyContentHandler extends DefaultHandler {
7. String hisname,address,money,sex,status;
8. String tagName;
9. @Override
10. public void characters(char[] ch, int start, int length)
11.    throws SAXException {
12.   if(tagName.equals("name"))
13.    hisname = new String(ch,start,length);
14.   else if(tagName.equals("sex"))
15.    sex = new String(ch,start,length);
16.   else if(tagName.equals("status"))
17.    status = new String(ch,start,length);
18.   else if(tagName.equals("address"))
19.    address = new String(ch,start,length);
20.   else if (tagName.equals("money"))
21.     money = new String(ch,start,length);
22. }
23. @Override
24. public void endDocument() throws SAXException {
25.   System.out.println("-------------end----------");
26. }
27. @Override
28. public void endElement(String uri, String localName, String qName)
29.    throws SAXException {
30.   //在worker标签解析完之后，会打印出所有得到的数据
31.   tagName = "";
32.   if(localName.equals("worker")){
33.    this.printout();
34.   }
35. }
36. @Override
37. public void startDocument() throws SAXException {
38.   System.out.println("-----------begin----------");
39. }
40. @Override
41. public void startElement(String uri, String localName, String qName,
42.    Attributes attr) throws SAXException {
43.   tagName = localName;
44.   if(localName.equals("worker")){
45.    //获取标签的全部属性
46.    for(int i = 0 ;i < attr.getLength();i++){
47.     System.out.println(attr.getLocalName(i)+"="+attr.getValue(i));
48.    }
49.   }
50. }
51. private void printout(){
52.   System.out.print("name:");
53.   System.out.println(hisname);
54.   System.out.print("sex:");
55.   System.out.println(sex);
56.   System.out.print("status:");
57.   System.out.println(status);
58.   System.out.print("address:");
59.   System.out.println(address);
60.   System.out.print("money:");
61.   System.out.println(money);
62.   System.out.println();
63. }
64. }

复制代码

在main.xml中创建一个按钮：

2. <?xml version="1.0" encoding="utf-8"?>
3. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
4.     android:orientation="vertical"
5.     android:layout_width="fill_parent"
6.     android:layout_height="fill_parent"
7.     >
8. <Button
9.     android:id="@+id/jiexi"
10.     android:layout_width="fill_parent"
11.     android:layout_height="wrap_content"
12.     android:text="解析xml文件"
13. />
14. </LinearLayout>

复制代码

并在XMLActivity.java中设置其监听器，此例为先从网络上下载xml文件，再读取，打印到LogCat中：

2. package com.zhangjie.xml;
3. import java.io.StringReader;
4. import javax.xml.parsers.SAXParserFactory;
5. import org.xml.sax.InputSource;
6. import org.xml.sax.XMLReader;
7. import com.zhangjie.utils.HttpDownloader;
8. import android.app.Activity;
9. import android.os.Bundle;
10. import android.view.View;
11. import android.view.View.OnClickListener;
12. import android.widget.Button;
13. public class XmlActivity extends Activity {
14.     /** Called when the activity is first created. */
15.     @Override
16.     public void onCreate(Bundle savedInstanceState) {
17.         super.onCreate(savedInstanceState);
18.         setContentView(R.layout.main);
19.         Button button = (Button)findViewById(R.id.jiexi);
20.         button.setOnClickListener(new XMLButtonListener());
21.     }
22.    
23.     class XMLButtonListener implements OnClickListener{
24.   @Override
25.   public void onClick(View v) {
26.    HttpDownloader hd = new HttpDownloader();
27.    String resultStr = hd.download("http://www.javaxxz.com/new.xml");
28.    System.out.println(resultStr);
29.    try{
30.     //创建一个SAXParserFactory
31.     SAXParserFactory factory = SAXParserFactory.newInstance();
32.     XMLReader reader = factory.newSAXParser().getXMLReader();
33.     //为XMLReader设置内容处理器
34.     reader.setContentHandler(new MyContentHandler());
35.     reader.parse(new InputSource(new StringReader(resultStr)));
36.    }catch(Exception e){
37.     e.printStackTrace();
38.    }
39.    
40.   }
41.     }
42. }

复制代码

注：有关如何下载文本文件的例子，请参考帖子：http://www.javaxxz.com/read.php?tid=1212
http://www.javaxxz.com/new.xml 网络上的xml文件如下：



当单击“解析xml文件”按钮后在LoGCat中打印的信息：

yy2011

支持。。

zestful

支持下~