public void test()
{
File file  = new File("d://123.xml"); 
SAXBuilder sb = new SAXBuilder(false);
try 
{
Document doc= sb.build(file);
Element rootEle = doc.getRootElement();
//System.out.println(rootEle.getName());
List list  = rootEle.getChildren("metadata");
System.out.println(list.size());
} catch (JDOMException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
请问为什么我取的metadata元素的集合总是0啊,我取任何一个子元素都是List里总是0呢??
我的XML文件如下:
<?xml version="1.0" encoding="UTF-8"?>
<!--This is a Reload version 2.5.4 SCORM 2004 Content Package document-->
<!--Spawned from the Reload Content Package Generator - http://www.reload.ac.uk-->
<manifest xmlns="http://www.imsglobal.org/xsd/imscp_v1p1" xmlns:imsmd="http://ltsc.ieee.org/xsd/LOM" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:adlcp="http://www.adlnet.org/xsd/adlcp_v1p3" xmlns:imsss="http://www.imsglobal.org/xsd/imsss" xmlns:adlseq="http://www.adlnet.org/xsd/adlseq_v1p3" xmlns:adlnav="http://www.adlnet.org/xsd/adlnav_v1p3" identifier="MANIFEST-4E6D7B08102391F4EC8547111CC382D8" xsi:schemaLocation="http://www.imsglobal.org/xsd/imscp_v1p1 imscp_v1p1.xsd http://ltsc.ieee.org/xsd/LOM lom.xsd http://www.adlnet.org/xsd/adlcp_v1p3 adlcp_v1p3.xsd http://www.imsglobal.org/xsd/imsss imsss_v1p0.xsd http://www.adlnet.org/xsd/adlseq_v1p3 adlseq_v1p3.xsd http://www.adlnet.org/xsd/adlnav_v1p3 adlnav_v1p3.xsd">
<metadata>
    <schema>ADL SCORM</schema>
    <schemaversion>2004 3rd Edition</schemaversion>
</metadata>
<organizations default="ORG-9145181529E6F4B2FC54D836F503DAAD">
  <organization identifier="ORG-9145181529E6F4B2FC54D836F503DAAD" structure="hierarchical">
      <title>电路分析基础</title>
      <item identifier="ITEM-03AB09117FD926C5CE353F7D58676AE4" identifierref="RES-C4FAAAB974AAD6CCBB2889886C3D8F8E" isvisible="true">
        <title>课程介绍</title>
      </item>
      <item identifier="ITEM-180893523CDC2CFC862CE68DA1BAF8FF" identifierref="RES-0BA3AE12319F48E08FE36971286D0950" isvisible="true">
        <title>考试大纲</title>
      </item>
      <item identifier="ITEM-6A2016F0CC0A83A601FC69D36C027A8C" isvisible="true">
        <title>第一章 电路的基本概念和定律</title>
        <item identifier="ITEM-E7DBFF75FE48B5E0F846B12F6EB950C6" isvisible="true">
          <title>本章导读</title>
          <item identifier="ITEM-8A3624AAF09E7EC679C8A7BC4AD47459" identifierref="RES-A4EC5940E22BBDABFC08AA685BFA8C67" isvisible="true">
            <title>主要内容</title>
          </item>
          <item identifier="ITEM-9A8B0B80646C3591B7CB8D232AE241B0" identifierref="RES-411CA77C59DC3DA1FB54739AD7A7F32B" isvisible="true">
            <title>学习目标</title>
          </item>
        </item>
        <item identifier="ITEM-DF6DBA6780831D819343170C5519814E" isvisible="true">
          <title>课堂精讲</title>
          <item identifier="ITEM-086DFF92781E20DE1A7EB70BB489CC8A" identifierref="RES-0B0F43494664E58185855DBAECE56E13" isvisible="true">
            <title>绪论</title>
          </item>
          <item identifier="ITEM-CC647F11AB5FFC2D7B48EAE4612FC28B" identifierref="RES-D684639EAF7DDE5617AF1B97B4276970" isvisible="true">
            <title>电路和电路模型</title>
          </item>
        </item>
        <item identifier="ITEM-4701B95AC81F28E271EEF74770C4D73D" isvisible="true">
             <title>本章检测</title>
               <item identifier="ITEM-F22673160CF2378FD1CD17105ABC416F" identifierref="RES-19AF8651983B102FF566A399FE931970" isvisible="true">
                    <title>作业中常见问题提示</title>
              </item>
               <item identifier="ITEM-271F27BE5E08C6829810E5D0610BF25C" identifierref="RES-E0470DBAA0D34DAA939FC9E524BFE178" isvisible="true">
                    <title>本章测试</title>
              </item>
        </item>
             <item identifier="ITEM-2D993B510833D24F3ED0977E81AF14F0" isvisible="true">
              <title>学习资源</title>
          <item identifier="ITEM-B6AC6D9A6EA73FB684223B7706FDAC11" identifierref="RES-DE8A0FDEA68BD36C3D1562656FFB405B" isvisible="true">
            <title>教师手稿</title>
          </item>
          <item identifier="ITEM-394C120E6B3FA06AB80EA78EA4D0C014" identifierref="RES-B379F336A1FC5549E452824AA6D80081" isvisible="true">
            <title>电路实验</title>
          </item>
        </item>
      </item>
    </organization>
  </organizations>
  </manifest>