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javadom-在一个元素之后插入另一个元素

dom xml java

Andrei Ciobanu · 技术社区 · 16 年前

<?xml version="1.0" encoding="UTF-8"?>
<process
    name="TestSVG2"
    xmlns="http://www.example.org"
    targetNamespace="http://www.example.org"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <sequence>
      <receive name="Receive1" createInstance="yes"/>
      <assign name="Assign1"/>
      <invoke name="Invoke1"/>
      <assign name="Assign2"/>
      <reply name="Reply1"/>
   </sequence>
</process>

我想在 <sequence></sequence> . 例如,如果我想在 "Assign1" ,新的XML应该是这样的:

   <sequence>
      <receive name="Receive1" createInstance="yes"/>
      <assign name="Assign1"/>
      <newtype name="NewNode"/>
      <invoke name="Invoke1"/>
      <assign name="Assign2"/>
      <reply name="Reply1"/>
   </sequence>

我必须在函数中使用javadom来实现这一点。函数签名应如下所示:

 public void addActionDom(String name, String stepType, String stepName)

哪里:

name 是预先存在的元素,之后将进行插入;
stepType
stepName 是新插入元素的name属性。

    public void addActionDom(String name, String stepType, String stepName) {
        File xmlFile = new File(path + "/resources/" + BPELFilename);
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db;
        try {
            /* Load XML */
            db = dbf.newDocumentBuilder();
            Document doc = db.parse(xmlFile);
            doc.getDocumentElement().normalize();

            /* Iterate throughout the type tags and delete */
            for (String cTag : typeTags) {
                NodeList cnl = doc.getElementsByTagName(cTag);
                for (int i = 0; i < cnl.getLength(); ++i) {
                    Node cnode = cnl.item(i);
                    if (cnode.getNodeType() == Node.ELEMENT_NODE) {
                        Element elem = (Element)cnode; // 'elem' Element after which the insertion should be made
                        if (elem.getAttribute("name").equals(name)) { 
                            Element newElement = doc.createElement(stepType); // Element to be inserted 
                            newElement.setAttribute("name", stepName);
                            // CODE HERE
                        }
                    }
                }
            }

            /* Save the editing */
            Transformer transformer =
                TransformerFactory.newInstance().newTransformer();
            StreamResult result =
                new StreamResult(new FileOutputStream(path + "/resources/" +
                                                      BPELFilename));
            DOMSource source = new DOMSource(doc);
            transformer.transform(source, result);
        } catch (Exception e) {
            /* ParserConfigurationException */
            /* SAXException */
            /* IOException */
            /* TransformerConfigurationException */
            /* TransformerException */
            /* Exception */
            e.printStackTrace();
        }
    }
}

4 回复 | 直到 16 年前

MatEngel f1sh 11 年前

好吧,亚伦·迪古拉在速度上打败了我。我也得自己想办法。我没用 cnl.item(i+1) nextSibling() :

Element newElement = doc.createElement(stepType); // Element to be inserted 
newElement.setAttribute("name", stepName);
elem.getParentNode().insertBefore(newElement, elem.getNextSibling());

appendChild(Node node) //appends the given child to the end of the list of children

和

insertBefore(Node new, Node child) //inserts "new" into the list, before the 'child' node.

如果有insertAfter(Node new,Node child)方法,这对您来说非常简单。但不幸的是,没有。

Aaron Digulla 16 年前

这很简单,但是org.w3c.domapi有点。。。奇怪的是:

Node next = cnl.item(i + 1);
Node newChild = createChild();
next.getParent().insertBefore(newChild, next);

使用JDom,它更简单:

Node newChild = createChild();
cnl.getParent().addContent(i, newChild);

Garett 16 年前

elem.getParentNode().insertBefore(newElement, elem.getNextSibling());

Lukas Eder 14 年前

正如其他人所指出的,domapi对于这样简单的操作来说相当冗长。如果你用 jOOX

// Find the element using XPath, and insert XML text after it
$(document).xpath("//sequence/assign[@name='Assign1']")
           .after("<newtype name=\"NewNode\"/>");

// Find the element using jOOX API, and insert an object after it
$(document).find("sequence")
           .find("assign")
           .filter(attr("name", "Assign1"))
           .after($("newtype").attr("name", "NewNode"));

请注意API与 jQuery .