前端之家收集整理的这篇文章主要介绍了
XML解析---DOM,
前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。
设置DOM的一般步骤
- 创建目标类;
- 创建ArrayList,用来存放解析结果;
- 通过DocumentBuilderFactory.newInstance() 获取factory;
- 通过factoty获得buider实例;
- 取得Dom builder.parse(InputStream);
- 寻找根节点 dom.getDocumentElement();
- 通过根节点获取所有的item; root.getElementByTagName();
- 遍历所有的item;
- 可以获得attribute;
- 这时可以获取没个item下的子节点;
- 遍历每个子节点;
- 判断类型
- 根据childNode.getNodeName() 将对应的值 childNode.getFirstChild().getNodeValue() 存入目标类的对象中
- 添加对象至Arraylist中;
package com.example.xmltest
import java.io.InputStream
import java.util.ArrayList
import java.util.List
import javax.xml.parsers.DocumentBuilder
import javax.xml.parsers.DocumentBuilderFactory
import org.w3c.dom.Document
import org.w3c.dom.Element
import org.w3c.dom.Node
import org.w3c.dom.NodeList
import android.os.Bundle
import android.app.Activity
import android.view.Menu
import android.view.View
import android.view.View.OnClickListener
import android.widget.Button
public class MainActivity extends Activity {
private Button dom_button
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
dom_button = (Button) findViewById(R.id.dom)
dom_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
try {
doDom(MainActivity.this.getResources().getAssets()
.open("book.xml"))
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace()
}
}
})
}
private void doDom(InputStream inStream) throws Exception {
List<Book> books = new ArrayList<Book>()
DocumentBuilderFactoryfactory = DocumentBuilderFactory.newInstance()
DocumentBuilder builder = factory.newDocumentBuilder()
Document dom = builder.parse(inStream)
Element root = dom.getDocumentElement()
NodeList item = root.getElementsByTagName("book")
for (int i = 0
Book book = new Book()
Element bookNode = (Element) item.item(i)
NodeList childNodes = bookNode.getChildNodes()
for (int j = 0
Node node = childNodes.item(j)
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element childnode = (Element) node
if ("id".equals(childnode.getNodeName())) {
book.setId(childnode.getFirstChild().getNodeValue())
} else if ("name".equals(childnode.getNodeName())) {
book.setName(childnode.getFirstChild().getNodeValue())
} else if ("price".equals(childnode.getNodeName())) {
book.setPrize(childnode.getFirstChild().getNodeValue())
}
}
}
books.add(book)
}
for(Book book:books)
{
System.out.println(book.toString())
}
}
}