package cn.qf.parser;

import java.io.BufferedOutputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.ParseException;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.util.EntityUtils;

/**

 * HttpClient请求网络 获取XML数据

 *

 * @author my

 *

 */

public class HttpUtils {

    /**

     * Http请求网络获取xml数据

     * 下载图片

     * @param path

     */

    public static void downLoadImg(String path) {

        BufferedOutputStream bos = null;

        try {

            // 1.创建HttpCLient对象

            HttpClient httpClient = new DefaultHttpClient();

            // 2.创建请求对象 指定地址

            HttpGet htpGet = new HttpGet(path);

            // 3.执行请求 获得HttpResponse对象

            HttpResponse response = httpClient.execute(htpGet);

            // 4.获得响应码

            int code = response.getStatusLine().getStatusCode();

            if (code == 200) {

                // 获得响应的HttpEntity对象

                HttpEntity entity = response.getEntity();

                String name = path.substring(path.lastIndexOf("/") + 1);

                bos = new BufferedOutputStream(new FileOutputStream(name));

                bos.write(EntityUtils.toByteArray(entity));

                bos.flush();

            }

        } catch (ClientProtocolException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } finally {

            if (bos != null) {

                try {

                    bos.close();

                } catch (IOException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

            }

        }

    }

    /**

     * 从网络下载Xml文件

     * @param path

     * @return

     */

    public static String getXMLByInternet(String path) {

        try {

            // 1.创建httpClient对象

            HttpClient httpClient = new DefaultHttpClient();

            // 2.创建请求对象 指定地址

            HttpGet httpGet = new HttpGet(path);

            // 3.执行请求，获得HttpResponse对象

            HttpResponse response = httpClient.execute(httpGet);

            // 4.获得响应码

            int code = response.getStatusLine().getStatusCode();

            if (code == 200) {

                // 获得响应的httpEntity对象__客户端服务端传递的载体

                HttpEntity entity = response.getEntity();

                return EntityUtils.toString(entity, "GBK");

            }

        } catch (ClientProtocolException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (ParseException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return null;

    }

}

package com.qf.PullParser4;

import java.io.IOException;

import java.io.StringReader;

import java.util.ArrayList;

import java.util.List;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.xmlpull.v1.XmlPullParserFactory;

/**

 * http://api.map.baidu.com/telematics/v3/weather?location=北京&output=xml&ak=

 * mXBIDrvTOwwmYaTtN03Lo0j2 请求上述接口，使用pull解析<date>字段和<dayPictureUrl>字段，并把

 * <dayPictureUrl>字段对应的图片下载到本地， 展示到jsp页面

 *

 * @author my

 *

 */

class WeatherDate {

    private String date;

    private String dayPictureUrl;

    public String getdate() {

        return date;

    }

    public void setdate(String date) {

        this.date = date;

    }

    public String getDayPictureUrl() {

        return dayPictureUrl;

    }

    public void setDayPictureUrl(String dayPictureUrl) {

        this.dayPictureUrl = dayPictureUrl;

    }

    @Override

    public String toString() {

        return "WeatherDate [date=" + date + ", dayPictureUrl=" + dayPictureUrl + "]";

    }

}

public class parserDemo {

    public static void main(String[] args) {

        String xml = HttpUtils.getXMLByInternet(

                "http://api.map.baidu.com/telematics/v3/weather?location=北京&output=xml&ak=mXBIDrvTOwwmYaTtN03Lo0j2");

        System.out.println(xml);

        try {

            // 创建解析器工厂对象

            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();

            // 创建解析器

            XmlPullParser parser = factory.newPullParser();

            // 设置数据源,
　　　　　　　//StringReader 是Reader的子类
　　　　　　　// StringReader 的数据源是String类型的字符串

　　　     　parser.setInput(new StringReader(xml));

            // 得到响应码

            int code = parser.getEventType();

            WeatherDate weatherDate = null;

            List<WeatherDate> list = null;

            String temp = "";

            while (code != XmlPullParser.END_DOCUMENT) {

                String name = parser.getName();

                switch (code) {

                case XmlPullParser.START_TAG:

                    if ("weather_data".equals(name)) {

                        list = new ArrayList<>();

                        temp = "weather";

                    } else if ("date".equals(name) && "weather".equals(temp)) {

                        weatherDate = new WeatherDate();

                        weatherDate.setdate(parser.nextText());

                    } else if ("dayPictureUrl".equals(name)) {

                        String path = parser.nextText();

                        weatherDate.setDayPictureUrl(path);

                        list.add(weatherDate);

                        // 下载图片

                        HttpUtils.downLoadImg(path);

                    }

                    break;

                default:

                    break;

                }

                code = parser.next();

            }

            for (WeatherDate weatherDate2 : list) {

                System.out.println(weatherDate2);

            }

        } catch (XmlPullParserException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

}