Question

我必须将eElement中找到的与旧值匹配的值更改为另一个值。

我尝试使用eElement.setAttribute(...)函数和setTextContent函数，但它不起作用。

如果我们假设新值存储在名为newValue的String变量中，我该如何运行代码？

NodeList leaf = doc.getElementsByTagName(relativeLeaf);
System.out.println(leaf.item(0).getNodeName());
for (int temp = 0; temp < leaf.getLength(); temp++) {
    Node nNode = leaf.item(temp);
    if (nNode.getNodeType() == Node.ELEMENT_NODE) {
        Element eElement = (Element) nNode;
        String oldValueInCells = eElement.getElementsByTagName(relativeLeaf).item(0).getTextContent();
        System.out.println("old tag : " + eElement.getElementsByTagName(relativeLeaf).item(0).getTextContent());
        if(oldValueInCells.contentEquals(oldVal)){
            // ####
            // here i have to change tha value in eElement
            // where it match with the old Value with a new one    
        }
    }
}

Answer 1

基于文档，我认为您可以获取节点元素，然后设置一个值。首先应该得到这样的节点元素：

 Node node = eElement.getElementsByTagName(relativeLeaf).item(0); //You get the node here so you can use it as well to create OldValueInCells
 String oldValueInCells = node.getTextContent();
        System.out.println("old tag : " + oldValueInCells);
        if(oldValueInCells.contentEquals(oldVal)){
            // ####
            // here i have to change tha value in eElement
            // where it match with the old Value with a new one    
           node.setTextContent("new value"); //Here you will set the value to the node
        }

来源：https://docs.oracle.com/javase/7/docs/api/org/w3c/dom/Node.html

在java中使用dom的xml更新值

1 个答案: