如何从Java中的特定XML元素检索

Question

What line code can I add in my method that will only modify the tagname "location" as LONG AS IT CONTAINS A SPECIFIC information under the node named "address?" So if i update "color" or "size" then I can tell the nodeList: "change these values only if it contains 123 Main Street in "address." I've tried all types of "equal etc." note: I created an object that i use object.getAddress as my variable that i want to check against. XML has 50 entries:

<location>
    <address>123 Main Street</address>
    <color>red</color>
    <size>large</size>
</location>


public void changeValue(Document doc, String oldValue, String NewValue) throws         Exception {
    Element root = doc.getDocumentElement();
    NodeList childNodes = root.getElementsByTagName("location");
    for (int i = 0; i < childNodes.getLength(); i++) {
        NodeList subChildNodes = childNodes.item(i).getChildNodes();
        for (int j = 0; j < subChildNodes.getLength(); j++) {
            try {
                if (subChildNodes.item(j).getTextContent().equals(oldValue)) {
                    subChildNodes.item(j).setTextContent(NewValue);
                }
            } catch (Exception e) {
            }
        }
    }
    File file = new File("XMLDatabase.xml");
    save(file, doc);
}

Answer 1

I hope this helps!

for (int i = 0; i < childNodes.getLength(); i++) {
        NodeList subChildNodes = childNodes.item(i).getChildNodes();
        for (int j = 0; j < subChildNodes.getLength(); j++) {
            try {
                if (subChildNodes.item(j).getTextContent().equals("123 Main Street")) {
                    int temp=j;
                    subChildNodes.item(temp).setTextContent("value you want to set");
                    subChildNodes.item(temp+2).setTextContent("value you want to set");
                    subChildNodes.item(temp+4).setTextContent("value you want to set");
                }
            } catch (Exception e) {
            }
        }
}