将 XML 字符串中的所有 CDATA 读入 Java ArrayList？

Question

我想读取与子节点关联的所有 CDATA 并将它们存储到 java ArrayList 中！如果您能提出一种简单快捷的方法，我将不胜感激！

谢谢！

In 希望有一个小例行程序测试 txnid 的特定值，并读取不同数组元素中的所有关联 CDATA 查询。

 <?xml version="1.0" encoding="utf-8" standalone="yes" ?> 
 <ZQueries txid="Group 1" version="1.0.0.0">
 <ZQuery name="Some Name 1" savename="SomeFileName1.xml">
  <![CDATA[ 
      SELECT ...........

  ]]> 
 </ZQuery>
 <ZQuery name="Some Name 2"   savename="SomeFileName.xml">
 <![CDATA[ 
    SELECT .............


  ]]> 
</ZQuery>
<ZQuery name="some name 3" savename="someFileName.xml">
<![CDATA[ 
    SELECT ..............

 ]]> 
 </ZQuery>
 </ZQueries>
 <ZQueries txid="Group 2" version="1.0.0.0">
 <ZQuery name="Some Name 1" savename="SomeFileName1.xml">
  <![CDATA[ 
      SELECT ...........

  ]]> 
 </ZQuery>
 <ZQuery name="Some Name 2"   savename="SomeFileName.xml">
 <![CDATA[ 
    SELECT .............


  ]]> 

 </ZQueries>

这是正确的方法吗！以下代码创建了所示的异常！你觉得我怎么能解决这个问题！

 SAXBuilder builder = new SAXBuilder();
 Document doc = builder.build(in);  //build a JDOM doc from an input stream
 ArrayList<String> queries = new ArrayList<String>();
 Element root = doc.getRootElement();

 Iterator elemIter = root.getDescendants();

 while (elemIter.hasNext()) {
     Element tempElem = (Element) elemIter.next();
     if (root.getChild("ZQueries").getAttributeValue("txnid").equals(tempTxnid)) {
         String CDATA = tempElem.getChildText("ZQueries");
         queries.add(CDATA);
     } 
 }



Exception in thread "AWT-EventQueue-0" java.security.PrivilegedActionException:
java.security.PrivilegedActionException: org.jdom.input.JDOMParseException: Error on 
line 1: Premature end of file.

Answer 1

使用 SAX 解析器：

try {
    // Create a builder factory
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

    // Configure it to coalesce CDATA nodes
    factory.setCoalescing(true);

    // Create the builder and parse the file
    // Perform your Parsing here 

    // doc will not contain any CDATA nodes
} catch (SAXException e) {
    // A parsing error occurred; the xml input is not valid
} catch (ParserConfigurationException e) {
} catch (IOException e) {
}

Answer 2

考虑使用JDOM。在解析文档之前，创建一个数组列表，可能是字符串类型。遍历元素，当您点击 ZQuery 元素时，使用 element.getChildText("ZQuery") 将返回所有不带 CDATA 标记的 CDATA 信息。

FileInputStream fis = new FileInputStream(file); //where file holds the data to parse. 

Can also use StringBuilder
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(fis); //build a JDOM doc from file
ArrayList<String> arl = new ArrayList<String>();
Element root = doc.getRootElement();
Iterator elemIter = root.getDescendants(); //you can put filters on this to only get specific types of elements ie: root.getDescendants("ZQuery"); will give you an iterator over just ZQuery elements. 

while (elemIter.hasNext()) {
    Element foo = (Element) elemIter.next();
    String CDATA = foo.getChildText("ZQuery")
    arl.add(CDATA);
}

其他资源：

• JDOM Tutorial from IBM
• JDOM Tutorial from JDOM website
• Parsing with JDOM -- JavaworldParsing with JDOM -- Rose India