DOM解析XML文件实例

XML文件：

response：

<?xml version="1.0"?>
<soap:Envelope
 xmlns:soap="http://www.w3.org/2001/12/soap-envelope" soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">
    <soap:Body xmlns:m="http://www.nwpu.edu.cn/soa/xml/test ">
        <m:GetWeatherResponse>
            <m:Temperature>13.2</m:Temperature>
            <m:Weather >sunny</m:Weather >
        </m:GetWeatherResponse>
    </soap:Body>
</soap:Envelope> 

request:

<?xml version="1.0"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2001/12/soap-envelope" soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">
    <soap:Body xmlns:n="http://www.nwpu.edu.cn/soa/xml/test">
        <n:GetWeather>
            <n:CityName>西安</n:CityName>
        </n:GetWeather>
    </soap:Body>
</soap:Envelope>

解析函数：

package com.wjy.marshal;
import java.io.File;  

import javax.xml.parsers.DocumentBuilder;  
import javax.xml.parsers.DocumentBuilderFactory;  
  
import org.w3c.dom.Document;  
import org.w3c.dom.Element;  
import org.w3c.dom.NodeList;  
  
public class GetCityName  
{  
    private String xmlFilePath="C://Documents and Settings/Administrator/桌面/request.xml";
    public String getCityName()
    {  
        String result = "";
        try {
            // step 1: 获得dom解析器工厂（工作的作用是用于创建具体的解析器）  
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
            //System.out.println("class name: " + dbf.getClass().getName());  
            // step 2:获得具体的dom解析器  
            DocumentBuilder db = dbf.newDocumentBuilder();  
            //System.out.println("class name: " + db.getClass().getName());  
            // step3: 解析一个xml文档，获得Document对象（根结点）  
            Document document = db.parse(new File(xmlFilePath));  
            NodeList nodeList=document.getElementsByTagName("n:GetWeather");
            Element element=(Element)nodeList.item(0);
            result=element.getElementsByTagName("n:CityName").item(0).getFirstChild().getNodeValue();

        } catch (Exception e) {
            // TODO: handle exception
        }
        
        return result;
    }  
}  

package com.wjy.marshal;
import java.io.File;  

import javax.xml.parsers.DocumentBuilder;  
import javax.xml.parsers.DocumentBuilderFactory;  
  
import org.w3c.dom.Document;  
import org.w3c.dom.Element;  
import org.w3c.dom.NodeList;  
  
public class GetCityWeather  
{  
    private String xmlFilePath="C://Documents and Settings/Administrator/桌面/response.xml";
    public String getCityWeather()
    {  
        String tempurature = "";
        String weather="";
        try {
            // step 1: 获得dom解析器工厂（工作的作用是用于创建具体的解析器）  
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
            //System.out.println("class name: " + dbf.getClass().getName());  
            // step 2:获得具体的dom解析器  
            DocumentBuilder db = dbf.newDocumentBuilder();  
            //System.out.println("class name: " + db.getClass().getName());  
            // step3: 解析一个xml文档，获得Document对象（根结点）  
            Document document = db.parse(new File(xmlFilePath));  
            NodeList nodeList=document.getElementsByTagName("m:GetWeatherResponse");
            Element element=(Element)nodeList.item(0);
            tempurature=element.getElementsByTagName("m:Temperature").item(0).getFirstChild().getNodeValue();
            weather=element.getElementsByTagName("m:Weather").item(0).getFirstChild().getNodeValue();

            System.out.println(tempurature+"    "+weather);
        } catch (Exception e) {
            // TODO: handle exception
        }
        
        return tempurature;
    }  
}  

主函数：

import com.wjy.marshal.GetCityName;
import com.wjy.marshal.GetCityWeather;


public class zhu {
    public static void main(String args[]){
        GetCityWeather getCityWeather=new GetCityWeather();
        getCityWeather.getCityWeather();
        
        
        GetCityName getCityName=new GetCityName();
        System.out.println(getCityName.getCityName());
    }
}