xml 使用 sax 解析器从子标签解析数据
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【中文标题】xml 使用 sax 解析器从子标签解析数据【英文标题】：xml parsing data from child tags using sax parser 【发布时间】：2013-01-08 06:13:17 【问题描述】：我是 android 新手，所以如果我问一些愚蠢的问题，我很抱歉。我正在使用 android 中的天气解析。我正在使用 SAX 解析器。现在，我被内容处理程序困住了。有这么多教程，我得到了解析数据的想法，但所有这些示例都是基于包含标签中属性的 XML 文件。对于我从中检索数据的 XML 文件，标签中没有属性，只有子节点。现在我被困在这里我不知道如何获取子节点的值。
<data>
<request>
<type>City</type>
<query>Peshawar, Pakistan</query>
</request>
<current_condition>
<observation_time>01:04 PM</observation_time>
<temp_C>20</temp_C>
<temp_F>68</temp_F>
<weatherCode>113</weatherCode>
<weatherIconUrl>
</weatherIconUrl>
现在我想从“”和“”中获取数据，但我真的找不到它，请帮帮我。这是我的内容处理程序类的代码。
public class HandlingXmlStuff extends DefaultHandler
XmlDataCollected info=new XmlDataCollected();
public String getInformation()
return info.dataToString();
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException
// TODO Auto-generated method stub
if(localName.equals("query"))
String city=....???;
info.setCity(city);
else if(localName.equals("temp_f"))
String t=...???;
int temp=Integer.parseInt(t);
info.settemp(temp);
【问题讨论】：
发布完整的xml文件 free.worldweatheronline.com/feed/… 萨克斯是你唯一的选择吗？ 【参考方案1】：这是从给定的 xml 文件中获取数据的解决方案。
一个示例 weather.xml 文件：
<?xml version="1.0" encoding="UTF-8"?>
<data>
<request>
<type>City</type>
<query>Peshawar, Pakistan</query>
</request>
<current_condition>
<observation_time>01:04 PM</observation_time>
<temp_C>20</temp_C>
<temp_F>68</temp_F>
<weatherCode>113</weatherCode>
<weatherIconUrl> a url </weatherIconUrl>
</current_condition>
</data>
HandlingXmlStuff.java：
import java.io.IOException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
*
* @author visruth
*/
public class HandlingXmlStuff extends DefaultHandler
private boolean typeStatus;
private boolean queryStatus;
private boolean observation_timeStatus;
private boolean temp_CStatus;
private boolean temp_FStatus;
private boolean weatherCodeStatus;
private boolean weatherIconUrlStatus;
private String type;
private String query;
private String observation_time;
private String temp_C;
private String temp_F;
private String weatherCode;
private String weatherIconUrl;
public String getObservation_time()
return observation_time;
public String getQuery()
return query;
public String getTemp_C()
return temp_C;
public String getTemp_F()
return temp_F;
public String getType()
return type;
public String getWeatherCode()
return weatherCode;
public String getWeatherIconUrl()
return weatherIconUrl;
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException
if (qName.equals("type"))
typeStatus = true;
else
typeStatus = false;
if (qName.equals("query"))
queryStatus = true;
else
queryStatus = false;
if (qName.equals("observation_time"))
observation_timeStatus = true;
else
observation_timeStatus = false;
if (qName.equals("temp_C"))
temp_CStatus = true;
else
temp_CStatus = false;
if (qName.equals("temp_F"))
temp_FStatus = true;
else
temp_FStatus = false;
if (qName.equals("weatherCode"))
weatherCodeStatus = true;
else
weatherCodeStatus = false;
if (qName.equals("weatherIconUrl"))
weatherIconUrlStatus = true;
else
weatherIconUrlStatus = false;
@Override
public void characters(char[] ch, int start, int length) throws SAXException
if (typeStatus)
this.type = new String(ch, start, length).trim();
typeStatus = false;
if (queryStatus)
this.query = new String(ch, start, length).trim();
queryStatus = false;
if (observation_timeStatus)
this.observation_time = new String(ch, start, length).trim();
observation_timeStatus = false;
if (temp_CStatus)
this.temp_C = new String(ch, start, length).trim();
temp_CStatus = false;
if (temp_FStatus)
this.temp_F = new String(ch, start, length).trim();
temp_FStatus = false;
if (weatherCodeStatus)
this.weatherCode = new String(ch, start, length).trim();
weatherCodeStatus = false;
if (weatherIconUrlStatus)
this.weatherIconUrl = new String(ch, start, length).trim();
weatherIconUrlStatus = false;
public void parseDocument()
//get a factory
SAXParserFactory spf = SAXParserFactory.newInstance();
try
//get a new instance of parser
SAXParser sp = spf.newSAXParser();
//parse the file and also register this class for call backs
sp.parse(TestCase.class.getResource("wheather.xml").getPath(), this);
catch (SAXException se)
se.printStackTrace();
catch (ParserConfigurationException pce)
pce.printStackTrace();
catch (IOException ie)
ie.printStackTrace();
您可以使用以下代码检索数据：
HandlingXmlStuff handlingXmlStuf = new HandlingXmlStuff();
handlingXmlStuf.parseDocument();
System.out.println("type:" + handlingXmlStuf.getType() + ":type");
System.out.println("observation_time:" + handlingXmlStuf.getObservation_time() + ":observation_time");
System.out.println("temp_C:" + handlingXmlStuf.getTemp_C() + ":temp_C");
System.out.println("temp_F:" + handlingXmlStuf.getTemp_F() + ":temp_F");
System.out.println("weatherCode:" + handlingXmlStuf.getWeatherCode() + ":weatherCode");
System.out.println("weatherIconUrl:" + handlingXmlStuf.getWeatherIconUrl() + ":weatherIconUrl");
【讨论】：
非常感谢你，你帮了我很多。我不想问其他问题......在第二个代码中你粘贴了whats weather.xml。我为我的项目安排了代码，但它仍然不起作用..如果我粘贴我的所有代码和我从中解析数据的链接，你会帮助我吗？ @saman 如果你觉得这篇文章有帮助，为什么不投票呢？？？。 weather.xml 是一个包含您在帖子中包含的 xml 数据的文件。我已将完整答案作为单独的答案发布。 您上面粘贴的代码适用于 java，但不适用于 android。如果你对 android 有一些了解，我已经在 Facebook 上给你发了一条消息，里面有我的项目文件，请在这方面帮助我。 @visruth @saman 我没有收到任何消息。您可以使用http://visruthcv.appspot.com/ 中的联系我们表格与我联系。正确填写表格，并在表格的消息字段中包含您的所有疑问。发布后您将收到确认回复，然后您可以将您的项目代码回复到该邮件。那么，您是否在您的 android 清单文件中提供了必要的权限（如互联网）？如果不给它。 如何从同一个链接解析图像。除了显示图像之外，它还向我显示了链接。你能打电话给我吗？【参考方案2】：这是从xml data from the url 中提取值的完整解析解决方案。
来自provided link 的示例 xml 数据：
<?xml version="1.0" encoding="UTF-8"?>
<data>
<request>
<type>City</type>
<query>Peshawar, Pakistan</query>
</request>
<current_condition>
<observation_time>04:31 AM</observation_time>
<temp_C>7</temp_C>
<temp_F>45</temp_F>
<weatherCode>113</weatherCode>
<weatherIconUrl><![CDATA[http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png]]>
</weatherIconUrl>
<weatherDesc><![CDATA[Sunny]]>
</weatherDesc>
<windspeedMiles>0</windspeedMiles>
<windspeedKmph>0</windspeedKmph>
<winddirDegree>0</winddirDegree>
<winddir16Point>N</winddir16Point>
<precipMM>0.0</precipMM>
<humidity>70</humidity>
<visibility>4</visibility>
<pressure>1021</pressure>
<cloudcover>0</cloudcover>
</current_condition>
<weather>
<date>2013-01-26</date>
<tempMaxC>22</tempMaxC>
<tempMaxF>71</tempMaxF>
<tempMinC>7</tempMinC>
<tempMinF>45</tempMinF>
<windspeedMiles>8</windspeedMiles>
<windspeedKmph>13</windspeedKmph>
<winddirection>NW</winddirection>
<winddir16Point>NW</winddir16Point>
<winddirDegree>315</winddirDegree>
<weatherCode>113</weatherCode>
<weatherIconUrl><![CDATA[http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png]]>
</weatherIconUrl>
<weatherDesc><![CDATA[Sunny]]>
</weatherDesc>
<precipMM>0.0</precipMM>
</weather>
<weather>
<date>2013-01-27</date>
<tempMaxC>20</tempMaxC>
<tempMaxF>68</tempMaxF>
<tempMinC>8</tempMinC>
<tempMinF>46</tempMinF>
<windspeedMiles>7</windspeedMiles>
<windspeedKmph>12</windspeedKmph>
<winddirection>N</winddirection>
<winddir16Point>N</winddir16Point>
<winddirDegree>352</winddirDegree>
<weatherCode>113</weatherCode>
<weatherIconUrl><![CDATA[http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png]]>
</weatherIconUrl>
<weatherDesc><![CDATA[Sunny]]>
</weatherDesc>
<precipMM>0.0</precipMM>
</weather>
<weather>
<date>2013-01-28</date>
<tempMaxC>20</tempMaxC>
<tempMaxF>68</tempMaxF>
<tempMinC>7</tempMinC>
<tempMinF>45</tempMinF>
<windspeedMiles>9</windspeedMiles>
<windspeedKmph>14</windspeedKmph>
<winddirection>NW</winddirection>
<winddir16Point>NW</winddir16Point>
<winddirDegree>316</winddirDegree>
<weatherCode>113</weatherCode>
<weatherIconUrl><![CDATA[http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png]]>
</weatherIconUrl>
<weatherDesc><![CDATA[Sunny]]>
</weatherDesc>
<precipMM>0.0</precipMM>
</weather>
<weather>
<date>2013-01-29</date>
<tempMaxC>21</tempMaxC>
<tempMaxF>70</tempMaxF>
<tempMinC>8</tempMinC>
<tempMinF>46</tempMinF>
<windspeedMiles>6</windspeedMiles>
<windspeedKmph>9</windspeedKmph>
<winddirection>NW</winddirection>
<winddir16Point>NW</winddir16Point>
<winddirDegree>306</winddirDegree>
<weatherCode>113</weatherCode>
<weatherIconUrl><![CDATA[http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png]]>
</weatherIconUrl>
<weatherDesc><![CDATA[Sunny]]>
</weatherDesc>
<precipMM>0.0</precipMM>
</weather>
<weather>
<date>2013-01-30</date>
<tempMaxC>19</tempMaxC>
<tempMaxF>66</tempMaxF>
<tempMinC>8</tempMinC>
<tempMinF>47</tempMinF>
<windspeedMiles>8</windspeedMiles>
<windspeedKmph>13</windspeedKmph>
<winddirection>WNW</winddirection>
<winddir16Point>WNW</winddir16Point>
<winddirDegree>289</winddirDegree>
<weatherCode>116</weatherCode>
<weatherIconUrl><![CDATA[http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png]]>
</weatherIconUrl>
<weatherDesc><![CDATA[Partly Cloudy ]]>
</weatherDesc>
<precipMM>0.0</precipMM>
</weather>
</data>
HandlingXmlStuff.java：
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
*
* @author visruth
*/
public class HandlingXmlStuff extends DefaultHandler
private String key;
private Map<String, String> request = new HashMap<String, String>();
private Map<String, String> current_condition = new HashMap<String, String>();
private List<Map<String, String>> weather = new ArrayList<Map<String, String>>();
private Map<String, String> weatherMap;
private boolean requestStatus;
private boolean current_conditionStatus;
private boolean weatherStatus;
public Map<String, String> getCurrent_condition()
return this.current_condition;
public Map<String, String> getRequest()
return this.request;
public List<Map<String, String>> getWeather()
return this.weather;
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException
key = qName;
if (qName.equals("request"))
requestStatus = true;
else if (qName.equals("current_condition"))
current_conditionStatus = true;
else if (qName.equals("weather"))
weatherMap = new HashMap<String, String>();
weatherStatus = true;
@Override
public void characters(char[] ch, int start, int length) throws SAXException
String value = new String(ch, start, length).trim();
if (requestStatus)
if (!key.trim().equals("request") && !key.trim().isEmpty() && !value.isEmpty())
request.put(key, value);
else if (current_conditionStatus)
if (!key.trim().equals("current_condition") && !key.trim().isEmpty() && !value.isEmpty())
current_condition.put(key, new String(ch, start, length).trim());
else if (weatherStatus)
if (!key.trim().equals("weather") && !key.trim().isEmpty() && !value.isEmpty())
weatherMap.put(key, new String(ch, start, length).trim());
@Override
public void endElement(String uri, String localName, String qName) throws SAXException
if (qName.equals("request"))
requestStatus = false;
else if (qName.equals("current_condition"))
current_conditionStatus = false;
else if (qName.equals("weather"))
weather.add(weatherMap);
weatherStatus = false;
public void parseDocument()
//get a factory
SAXParserFactory spf = SAXParserFactory.newInstance();
try
//get a new instance of parser
SAXParser sp = spf.newSAXParser();
//parse the file and also register this class for call backs
sp.parse("http://free.worldweatheronline.com/feed/weather.ashx?q=peshawar,pakistan&format=xml&num_of_days=5&key=eab9f57359164426132301", this);
catch (SAXException se)
se.printStackTrace();
catch (ParserConfigurationException pce)
pce.printStackTrace();
catch (IOException ie)
ie.printStackTrace();
您可以使用以下代码检索值：
HandlingXmlStuff handlingXmlStuf = new HandlingXmlStuff();
handlingXmlStuf.parseDocument();
System.out.println("----values inside request tag-----");
Map<String, String> request = handlingXmlStuf.getRequest();
for (String key : request.keySet())
System.out.println(key + ":" + request.get(key) + ":" + key);
System.out.println("----values inside current_condition tag-----");
Map<String, String> current_condition = handlingXmlStuf.getCurrent_condition();
for (String key : current_condition.keySet())
System.out.println(key + ":" + current_condition.get(key) + ":" + key);
List<Map<String, String>> weather = handlingXmlStuf.getWeather();
for (Map<String, String> map : weather)
System.out.println("\n----each set of weather-----start");
for (String key : map.keySet())
System.out.println(key + ":" + map.get(key) + ":" + key);
System.out.println("----each set of weather-----end");
从上面的示例 xml 数据中，您将获得以下输出：
----values inside request tag-----
query:Peshawar, Pakistan:query
type:City:type
----values inside current_condition tag-----
cloudcover:0:cloudcover
observation_time:04:31 AM:observation_time
pressure:1021:pressure
temp_C:7:temp_C
visibility:4:visibility
temp_F:45:temp_F
windspeedMiles:0:windspeedMiles
precipMM:0.0:precipMM
winddirDegree:0:winddirDegree
winddir16Point:N:winddir16Point
weatherIconUrl:http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png:weatherIconUrl
humidity:70:humidity
windspeedKmph:0:windspeedKmph
weatherCode:113:weatherCode
weatherDesc:Sunny:weatherDesc
----each set of weather-----start
windspeedMiles:8:windspeedMiles
winddirection:NW:winddirection
date:2013-01-26:date
precipMM:0.0:precipMM
winddir16Point:NW:winddir16Point
winddirDegree:315:winddirDegree
weatherIconUrl:http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png:weatherIconUrl
tempMinC:7:tempMinC
windspeedKmph:13:windspeedKmph
tempMaxC:22:tempMaxC
weatherCode:113:weatherCode
tempMaxF:71:tempMaxF
tempMinF:45:tempMinF
weatherDesc:Sunny:weatherDesc
----each set of weather-----end
----each set of weather-----start
windspeedMiles:7:windspeedMiles
winddirection:N:winddirection
date:2013-01-27:date
precipMM:0.0:precipMM
winddir16Point:N:winddir16Point
winddirDegree:352:winddirDegree
weatherIconUrl:_0001_sunny.png:weatherIconUrl
tempMinC:8:tempMinC
windspeedKmph:12:windspeedKmph
tempMaxC:20:tempMaxC
weatherCode:113:weatherCode
tempMaxF:68:tempMaxF
tempMinF:46:tempMinF
weatherDesc:Sunny:weatherDesc
----each set of weather-----end
----each set of weather-----start
windspeedMiles:9:windspeedMiles
winddirection:NW:winddirection
date:2013-01-28:date
precipMM:0.0:precipMM
winddir16Point:NW:winddir16Point
winddirDegree:316:winddirDegree
weatherIconUrl:http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png:weatherIconUrl
tempMinC:7:tempMinC
windspeedKmph:14:windspeedKmph
tempMaxC:20:tempMaxC
weatherCode:113:weatherCode
tempMaxF:68:tempMaxF
tempMinF:45:tempMinF
weatherDesc:Sunny:weatherDesc
----each set of weather-----end
----each set of weather-----start
windspeedMiles:6:windspeedMiles
winddirection:NW:winddirection
date:2013-01-29:date
precipMM:0.0:precipMM
winddir16Point:NW:winddir16Point
winddirDegree:306:winddirDegree
weatherIconUrl:http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png:weatherIconUrl
tempMinC:8:tempMinC
windspeedKmph:9:windspeedKmph
tempMaxC:21:tempMaxC
weatherCode:113:weatherCode
tempMaxF:70:tempMaxF
tempMinF:46:tempMinF
weatherDesc:Sunny:weatherDesc
----each set of weather-----end
----each set of weather-----start
windspeedMiles:8:windspeedMiles
winddirection:WNW:winddirection
date:2013-01-30:date
precipMM:0.0:precipMM
winddir16Point:WNW:winddir16Point
winddirDegree:289:winddirDegree
weatherIconUrl:unny_intervals.png:weatherIconUrl
tempMinC:8:tempMinC
windspeedKmph:13:windspeedKmph
tempMaxC:19:tempMaxC
weatherCode:116:weatherCode
tempMaxF:66:tempMaxF
tempMinF:47:tempMinF
weatherDesc:Partly Cloudy:weatherDesc
----each set of weather-----end
startElement 在读取开始标签时调用，endElement 在读取结束标签时调用，characters 方法在每次调用 startElement 和 endElement 方法后调用。
【讨论】：
我的上帝..谢谢你谢谢你谢谢你..首先我将运行这个程序，然后在此基础上我将在 android 中实现相同的代码。如果有任何问题，我会再次打扰你：p 这是我的安卓代码。它有三个类，我必须解析查询标签和 temp_f 标签。它需要 2 个输入，即城市和州。比我附加用户输入城市和州的 url。然后尝试解析数据..我正在尽力而为，你也帮了我很多。这是代码 我很高兴，但你必须为这两个帮助你的帖子投票！！！我现在可以看到您的投票声望最低。我建议您使用正确的英语，并且只使用英语。 我无法理解您的第二条评论。里面的jux是什么？ @saman 我认为，首先您必须了解如何使用 *** 及其所说的规则。为什么您将这些代码发布为不同的答案？？？？如果您要提出任何答案，则这些答案必须仅是已发布问题的正确答案。而且您还必须在单一答案帖子中发布一个答案。你在做的不是一件好事。如果您对相关代码有任何疑问，可以在问题帖中提出。很抱歉，请记住：如果您不遵守 *** 规则，那么您的帐户可能会被知名会员阻止/限制。以上是关于xml 使用 sax 解析器从子标签解析数据的主要内容，如果未能解决你的问题，请参考以下文章