使用java从xml获取元素和属性

我很难理解如何在另一个xml标记中获取xml标记的属性和元素 例如： 如果我有这个xml部分：

现在我正在使用这个方法 NodeList tarList=doc.getElementsByTagNametarget

System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++");
         System.out.println("");
         System.out.println("");
         for (int tarTemp = 0; tarTemp < tarList.getLength(); tarTemp++) {
            Node tarNode = tarList.item(tarTemp);
            System.out.println("\nCurrent Element :" 
               + tarNode.getNodeName());



            if (tarNode.getNodeType() == Node.ELEMENT_NODE) {
               Element eElement = (Element) tarNode;
               System.out.println("name : " 
                  + eElement.getAttribute("name"));
               System.out.println("depends : " 
                      + eElement.getAttribute("depends"));
               System.out.println("unless : " 
                          + eElement.getAttribute("unless"));
               System.out.println("description : " 
                          + eElement.getAttribute("description"));
               System.out.println(
                            eElement.getTextContent());


               }

         }

---

现在，如果我想在这个输出中包含这个命令，我不能，因为tarList只在标记名目标中查找元素和属性

您需要以与处理目标相同的方式解析要包含在目标中的标记的节点：

---

为什么要用Java代码来做这件事？在XSLT中会容易得多。明白了，谢谢，这太糟糕了，如果你有多个不同的名称标记，那么你必须编写代码来处理它们中的每一个

 Current Element :target
 name : install
 depends : repackage
 unless : 
 description : 
 command: exec executable = start , vmlauncher = false
       arg line='/wait ${basedir}\Installation\${pkgname}.msi'

System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++");
         System.out.println("");
         System.out.println("");
         for (int tarTemp = 0; tarTemp < tarList.getLength(); tarTemp++) {
            Node tarNode = tarList.item(tarTemp);
            System.out.println("\nCurrent Element :" 
               + tarNode.getNodeName());



            if (tarNode.getNodeType() == Node.ELEMENT_NODE) {
               Element eElement = (Element) tarNode;
               System.out.println("name : " 
                  + eElement.getAttribute("name"));
               System.out.println("depends : " 
                      + eElement.getAttribute("depends"));
               System.out.println("unless : " 
                          + eElement.getAttribute("unless"));
               System.out.println("description : " 
                          + eElement.getAttribute("description"));
               System.out.println(
                            eElement.getTextContent());


               }

         }

 Current Element :target
 name : install
 depends : repackage
 unless : 
 description : 

if (tarNode.getNodeType() == Node.ELEMENT_NODE) {
    Element eElement = (Element) tarNode;
    NodeList internalNodes = eElement .getElementsByTagName("commmand");
    //process internalNodes 
    for (Element el : internalNodes)
    { 
       ...
    }
    ...