java - 通过JAVA解析xml的问题

Question

我试图通过JAVA解析xml，但解析后我得到org.apache.harmony.xml.dom.DocumentImpl@418b4c98。

这是我要解析的XML，例如，我需要id数据是5，default_image是 https://www.10ngah.com/api/images/products/5/5

XML

<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
<products>
<product>
<id>
<![CDATA[ 5 ]]>
</id>
<id_default_image xlink:href="https://www.10ngah.com/api/images/products/5/5"not_filterable="true">
<![CDATA[ 5 ]]>
</id_default_image>
<price>
<![CDATA[ 525 ]]>
</price>
<name>
<language id="1" xlink:href="https://www.10ngah.com/api/languages/1">
<![CDATA[ iPad 2 GB with Cellular ]]>
</language>
</name>
</product>
<product>
<id>
<![CDATA[ 6 ]]>
 </id>
<id_default_image xlink:href="https://www.10ngah.com/api/images/products/6/6" not_filterable="true">
<![CDATA[ 6 ]]>
</id_default_image>
<price>
<![CDATA[ 525 ]]>
</price>
<name>
<language id="1" xlink:href="https://www.10ngah.com/api/languages/1">
<![CDATA[ iPad 2 GB with Cellular ]]>
</language>
</name>
</product>
</products>
</prestashop>

解析代码

package com.prestoshop.xmlparser;

import java.util.List;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import android.app.Activity;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.BaseAdapter;
import android.widget.Toast;
import com.prestoshop.beans.ProductItems;
import com.prestoshop.utils.Utils;

public class ProductLoaderTask extends AsyncTask<Void, ProductItems, Void> {

private Activity mContext;
private List<ProductItems> products;
private BaseAdapter adapter;

public ProductLoaderTask(Activity context, List<ProductItems> productList,
        BaseAdapter adapter) {
    mContext = context;
    products = productList;
    this.adapter = adapter;
}

static final String KEY_PRESTASHOP = "prestashop";
static final String KEY_ALL_PRODUCTS = "products";

@Override
protected Void doInBackground(Void... params) {

    String url = Utils.PRODUCTS_URL;// use varargs just like an array
    Log.e("urlll", "" + url);
    XMLParser parser = new XMLParser();
    String xml = parser.getXmlFromUrl(url);
    Log.e("string xml", "" + xml);
    Document doc = parser.getDomElement(xml, mContext);


    NodeList nl = doc.getElementsByTagName("product");
            Log.e("noddd",""+nl);
    for (int i = 0; i < nl.getLength(); i++) {
        Element e = (Element) nl.item(i);
        Log.e("eeee", "" + e.toString());
        Log.e("nodelist", ""
                + parser.getValue(e, "price").toString());

        publishProgress(new ProductItems(
                parser.getValue(e, "name"),
                parser.getValue(e, "id"), parser.getValue(e,
                        "id_default_image"), 12.050000));

    }

    return null;
}

@Override
protected void onProgressUpdate(ProductItems... values) {

    ProductItems product = values[0];
    products.add(product);
    adapter.notifyDataSetChanged();
}

@Override
protected void onPostExecute(Void result) {
    Log.e("All done", products.toString());
    super.onPostExecute(result);
 }
}

Answer 1

按照文档 http://developer.android.com/training/basics/network-ops/xml.html 使用 XmlPullParser

将 xml 复制到assests文件夹以本地解析器(仅用于测试)。您可以从 url 获取 xml 并解析。

 InputStream is = MainActivity.this.getResources()
                     .getAssets().open("xmlparser.xml");
               new parserPull(is);

然后进行解析

public class parserPull
{

    private static final String ns = null;
    public parserPull(InputStream open) {
        try
        {
             XmlPullParser parser = Xml.newPullParser();
             parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
             parser.setInput(open, null);
             parser.nextTag();
             List<Entry> all = readFeed(parser);
             for(int i=0;i<all.size();i++)
             {
             Log.i("ID is..........",all.get(i).id);
             Log.i("Link is........",all.get(i).link);
             Log.i("Price is.......",all.get(i).price);
             }
        }catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    private List<Entry> readFeed(XmlPullParser parser) throws XmlPullParserException, IOException {
         List<Entry> entry = null;
        parser.require(XmlPullParser.START_TAG, ns, "prestashop");
        while (parser.next() != XmlPullParser.END_TAG) {
            if (parser.getEventType() != XmlPullParser.START_TAG) {
                continue;
            }
            String name = parser.getName();
            //Log.i("..................",name);
            // Starts by looking for the prestashop tag
            if (name.equals("products")) {
              entry= readProducts(parser);
            } else {
                skip(parser);
            }
        }  
        return entry;
    }
    private List<Entry> readProducts(XmlPullParser parser) throws XmlPullParserException, IOException {
        List<Entry> entries = new ArrayList<Entry>();

        parser.require(XmlPullParser.START_TAG, ns, "products");
        while (parser.next() != XmlPullParser.END_TAG) {
            if (parser.getEventType() != XmlPullParser.START_TAG) {
                continue;
            }
            String name = parser.getName();
           // Log.i("..................",name);
            // Starts by looking for the products tag
            if (name.equals("product")) {
                entries.add(readEntry(parser));
            } else {
                skip(parser);
            }
        }  
        return entries;
    }
    private Entry readEntry(XmlPullParser parser) throws XmlPullParserException, IOException {
        parser.require(XmlPullParser.START_TAG, ns, "product");
        String title = null;
        String summary = null;
        String link = null;
        while (parser.next() != XmlPullParser.END_TAG) {
            if (parser.getEventType() != XmlPullParser.START_TAG) {
                continue;
            }
            String name = parser.getName();
           // Log.i("...................",name);
            if (name.equals("id")) {
                title = readId(parser);
            } else if (name.equals("id_default_image")) {
                summary = readLink(parser);
            } else if (name.equals("price")) {
                link = readPrice(parser);
            } else {
                skip(parser);
            }
        }
        return new Entry(title, summary, link);
    }
    private String readPrice(XmlPullParser parser) throws IOException, XmlPullParserException {
        parser.require(XmlPullParser.START_TAG, ns, "price");
        String summary = readText(parser);
        parser.require(XmlPullParser.END_TAG, ns, "price");
        return summary;
    }
    private String readLink(XmlPullParser parser) throws IOException, XmlPullParserException {
        String link = "";
        parser.require(XmlPullParser.START_TAG, ns, "id_default_image");
        String tag = parser.getName();
       // Log.i("............",tag);
        String relType = parser.getAttributeValue(null, "not_filterable");  
        if (tag.equals("id_default_image")) {
            if (relType.equals("true")){
                link = parser.getAttributeValue(null, "xlink:href");
                parser.nextTag();
            } 
        }
        parser.require(XmlPullParser.END_TAG, ns, "id_default_image");
        return link;
    }
    private String readId(XmlPullParser parser) throws IOException, XmlPullParserException {
        parser.require(XmlPullParser.START_TAG, ns, "id");
        String title = readText(parser);
        parser.require(XmlPullParser.END_TAG, ns, "id");
        return title;
    }
    private String readText(XmlPullParser parser) throws IOException, XmlPullParserException {
        String result = "";
        if (parser.next() == XmlPullParser.TEXT) {
            result = parser.getText();
            parser.nextTag();
        }
        return result;
    }
    private void skip(XmlPullParser parser) throws XmlPullParserException, IOException {
        if (parser.getEventType() != XmlPullParser.START_TAG) {
            throw new IllegalStateException();
        }
        int depth = 1;
        while (depth != 0) {
            switch (parser.next()) {
            case XmlPullParser.END_TAG:
                depth--;
                break;
            case XmlPullParser.START_TAG:
                depth++;
                break;
            }
        }
     }
    public static class Entry {
        public final String id;
        public final String link;
        public final String price;

        private Entry(String id, String link, String price) {
            this.id = id;
            this.link = link;
            this.price = price;
        }
    }
} 

日志输出

12-10 03:29:44.664: I/ID is..........(1511):  5 
12-10 03:29:44.664: I/Link is........(1511): https://www.10ngah.com/api/images/products/5/5
12-10 03:29:44.674: I/Price is.......(1511):  525 
12-10 03:29:44.674: I/ID is..........(1511):  6 
12-10 03:29:44.674: I/Link is........(1511): https://www.10ngah.com/api/images/products/6/6
12-10 03:29:44.674: I/Price is.......(1511):  525