XML计算某个节点个数

Question

org.w3c.dom.Element root = doc.getDocumentElement();
NodeList contents = root.getChildNodes();
int contentNum = 0;
for (int i = 0; i < contents.getLength(); i++) {
org.w3c.dom.Node content = contents.item(i);
log.debug("node name="+content.getNodeName());
if(content.getNodeName().equals("item")){
contentNum++;
}
}
这样的方法拿不到<item>的个数，请问该如何拿？

Answer 1

<?xml version="1.0" encoding="gb2312" ?> 
- <contents>
- <!-- contents to be synchronized to content server
  --> 
- <content>
  <operation>1</operation> 
- <content-info>
  <content-id>234361</content-id> 
  <name_cn>video1</name_cn> 
  <name_en>s2333333d</name_en> 
  <description_cn>sd</description_cn> 
  <description_en>sd</description_en> 
  <keywords /> 
  <sp_id_tag>2</sp_id_tag> 
  <sp-id>02000002</sp-id> 
  <ref-price-type>1</ref-price-type> 
  <ref-price>3</ref-price> 
  <purpose>1</purpose> 
  <source-url>/home/cms/vs_upload/006.3gp;/home/cms/vs_upload/007.3gp</source-url> 
  <content-type>06</content-type> 
  <original-source>sd</original-source> 
  <copyright_owner_cn>sd</copyright_owner_cn> 
  <copyright_owner_en /> 
  <media-source /> 
  <submit-date>20070308111945</submit-date> 
  <approved-date>20070308112017</approved-date> 
  <effective-date>20070308000000</effective-date> 
  <expiry-date>20070409000000</expiry-date> 
  <previewinfo /> 
  <needpack /> 
  <needprepack>0</needprepack> 
  <packtype>0</packtype> 
  <copyright_send>1</copyright_send> 
  </content-info>
- <item>
- <item-info>
  <item-id>112220</item-id> 
  <mime-type /> 
  <content-size>3436</content-size> 
  <sp-internal-id /> 
  <reloadFlag>0</reloadFlag> 
  <content-url>ftp://192.168.231.44/home/cms/work/xml_dir/02000001/006.3gp</content-url> 
  </item-info>
- <video-property>
  <duration>3</duration> 
  <bit-rate>6</bit-rate> 
  <number-of-frames>6</number-of-frames> 
  <frame-height>6</frame-height> 
  <frame-weight>6</frame-weight> 
  <aspect_ratio>66</aspect_ratio> 
  <frame_rate>1</frame_rate> 
  <brightness>3</brightness> 
  <contrast>4</contrast> 
  <video_codec>2</video_codec> 
  <use_type>1</use_type> 
  <se-encode>false</se-encode> 
  <se-output-format>2</se-output-format> 
  </video-property>
  </item>
- <item>
- <item-info>
  <item-id>78911</item-id> 
  <mime-type /> 
  <content-size>0</content-size> 
  <sp-internal-id /> 
  <reloadFlag>0</reloadFlag> 
  <content-url>ftp://192.168.231.44/home/cms/work/xml_dir/02000001/007.3gp</content-url> 
  </item-info>
- <video-property>
  <duration>3</duration> 
  <bit-rate>6</bit-rate> 
  <number-of-frames>6</number-of-frames> 
  <frame-height>6</frame-height> 
  <frame-weight>6</frame-weight> 
  <aspect_ratio>66</aspect_ratio> 
  <frame_rate>1</frame_rate> 
  <brightness>3</brightness> 
  <contrast>4</contrast> 
  <video_codec>2</video_codec> 
  <use_type>1</use_type> 
  <se-encode>false</se-encode> 
  <se-output-format>2</se-output-format> 
  </video-property>
  </item>
  </content>
  </contents>

Answer 2

没用过这个
不过我用dom4j都是一个个遍历的，怕是要被人笑死了~

Answer 3

:)
dom4j：
List ss = rootElement.elements();
System.out.println(ss.size());不过这么出来的是根节点下的节点数，你这里就要走到<content>节点挨个求了：（