SAXParser
の使い方とそのコンポーネントを理解しています。私はこのファイルをテストするためのSAXParserを使用する場合、XML SAX:ある例のXMLファイル `qName`と` localName`を説明してください
<?xml-stylesheet href="/externalflash/NASA_Detail/NASA_Detail.xsl" type="text/xsl"?>
<rss version="2.0">
<channel>
<title>NASA Image of the Day</title>
<link>http://www.nasa.gov/multimedia/imagegallery/index.html</link>
<description>The latest NASA "Image of the Day" image.</description>
<language>en-us</language>
<docs>http://blogs.law.harvard.edu/tech/rss</docs>
<managingEditor>[email protected]</managingEditor>
<webMaster>[email protected]</webMaster>
<item xmlns:java_code="xalan://gov.nasa.build.Utils1">
<title>Expedition 30 Cosmonauts Perform Spacewalk</title>
<link>http://www.nasa.gov/multimedia/imagegallery/image_feature_2181.html</link>
<description>This image of Russian cosmonauts Oleg Kononenko and Anton Shkaplerov, both Expedition 30 flight engineers, was taken during a spacewalk on Thursday, Feb. 16, 2012. During the six-hour, 15-minute spacewalk, Kononenko and Shkaplerov moved the Strela-1 crane from the Pirs Docking Compartment in preparation for replacing it in 2012 with a new laboratory and docking module. The duo used another boom, the Strela-2, to move the hand-operated crane to the Poisk module for future assembly and maintenance work. Both telescoping booms extend like fishing rods and are used to move massive components outside the station. On the exterior of the Poisk Mini-Research Module 2, they also installed the Vinoslivost Materials Sample Experiment, which will investigate the influence of space on the mechanical properties of the materials. The spacewalkers also collected a test sample from underneath the insulation on the Zvezda Service Module to search for any signs of living organisms. Both spacewalkers wore Russian Orlan spacesuits bearing blue stripes and equipped with NASA helmet cameras. Image Credit: NASA</description>
<guid isPermaLink="true">http://www.nasa.gov/multimedia/imagegallery/image_feature_2181.html</guid>
<pubDate>Wed, 22 Feb 2012 00:00:00 EST</pubDate>
<enclosure length="1234567" type="image/jpeg" url="http://www.nasa.gov/images/content/624856main_image_2181_516-387.jpg"/>
</item>
</channel>
</rss>
ここに私の出力のいくつかの行である:ここで私がテストに使用私のXMLファイルがある
start Element: rss
Local Name // this line I don't know why null
qNam: rss
start characters:
start Element: channel
Local Name
qNam: channel
start characters:
私の質問は:私のXMLファイルに各要素はデフォルトのnamespace
に属し、qName
はlocal Name
になります(qName
の場合はprefix
なので)。
上記の結果では、要素rss
とchannel
(とまだ投稿していない他のすべて)のlocal Name
はnullです。
私のために説明できる人は、どうぞ。
感謝:)
"null"ではありません。空白です。重要な違い。 – skaffman