讀取XML使用JS

我讀雅虎天氣的xml文件讀取XML使用JS

<rss version="2.0" xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"> 
      <channel> 

<title>Yahoo! Weather - Sunnyvale, CA</title> 
<link>http://us.rd.yahoo.com/dailynews/rss/weather/Sunnyvale__CA/*http://weather.yahoo.com/forecast/USCA1116_f.html</link> 
<description>Yahoo! Weather for Sunnyvale, CA</description> 
<language>en-us</language> 
<lastBuildDate>Thu, 17 Feb 2011 3:55 am PST</lastBuildDate> 
<ttl>60</ttl> 

<yweather:location city="Sunnyvale" region="CA" country="United States"/> 
<yweather:units temperature="F" distance="mi" pressure="in" speed="mph"/> 
<yweather:wind chill="41" direction="150" speed="7" /> 
<yweather:atmosphere humidity="86" visibility="10" pressure="29.96" rising="2" /> 
<yweather:astronomy sunrise="6:54 am" sunset="5:49 pm"/> 
<image> 
<title>Yahoo! Weather</title> 
<width>142</width> 
<height>18</height> 
<link>http://weather.yahoo.com</link> 
<url>http://l.yimg.com/a/i/brand/purplelogo//uh/us/news-wea.gif</url> 
</image> 

<item> 
<title>Conditions for Sunnyvale, CA at 3:55 am PST</title> 
<geo:lat>37.37</geo:lat> 
<geo:long>-122.04</geo:long> 
<link>http://us.rd.yahoo.com/dailynews/rss/weather/Sunnyvale__CA/*http://weather.yahoo.com/forecast/USCA1116_f.html</link> 
<pubDate>Thu, 17 Feb 2011 3:55 am PST</pubDate> 
<yweather:condition text="Cloudy" code="26" temp="45" date="Thu, 17 Feb 2011 3:55 am PST" /> 
<description><![CDATA[ 
<img src="http://l.yimg.com/a/i/us/we/52/26.gif"/><br /> 
<b>Current Conditions:</b><br /> 
Cloudy, 45 F<BR /> 
<BR /><b>Forecast:</b><BR /> 
Thu - Rain. High: 54 Low: 44<br /> 
Fri - Rain. High: 53 Low: 39<br /> 
<br /> 
<a href="http://us.rd.yahoo.com/dailynews/rss/weather/Sunnyvale__CA/*http://weather.yahoo.com/forecast/USCA1116_f.html">Full Forecast at Yahoo! Weather</a><BR/><BR/> 
(provided by <a href="http://www.weather.com" >The Weather Channel</a>)<br/> 
]]></description> 
<yweather:forecast day="Thu" date="17 Feb 2011" low="44" high="54" text="Rain" code="12" /> 
<yweather:forecast day="Fri" date="18 Feb 2011" low="39" high="53" text="Rain" code="12" /> 
<guid isPermaLink="false">USCA1116_2011_02_17_3_55_PST</guid> 

</item> 
</channel> 
</rss>

使用下面的js代碼

var channel = xml.documentElement.getElementsByTagName("channel"); 
var c = channel.item(0).getElementsByTagName("ttl").item(0).text;

我得到變種C 60的值。我怎樣才能獲得「溼度=」 86" 屬性從yweather:atmosphere標籤

來源

2011-02-17 Muhammad Zeeshan

可能重複[解析XML名稱空間？]（http://stackoverflow.com/questions/1083565/parsing-xml-namespaces） – Cheeso 2011-02-17 14:07:38

重複的問題。請參閱http://stackoverflow.com/questions/1083565/parsing-xml-namespaces的答案。 – Cheeso 2011-02-17 14:08:06

這應該爲你做它：

var atmoNode = document.getElementByTagname("yweather:atmosphere").item(0); 
var humidity_string = atmoNode.attributes.humidity.value;

要通過屬性屬性訪問溼度

來源

2011-02-17 14:09:24 Shakakai

讀取XML使用JS

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