js訪問xml之節點操作（轉）
本文轉自：https://www.cnblogs.com/Caceolod/articles/1753117.html
程式碼
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->獲取元素值
x=xmlDoc.getElementsByTagName("title")[0];
y=x.childNodes[0];
txt=y.nodeValue;
結果：txt = "Everyday Italian"
獲取屬性值 - getAttribute()
xmlDoc=loadXMLDoc("books.xml");
txt=xmlDoc.getElementsByTagName("title")[0].getAttribute("lang");
結果：txt = "en"
獲取屬性值 - getAttributeNode()
x=xmlDoc.getElementsByTagName("title")[0].getAttributeNode("lang");
txt=x.nodeValue;
改變文字節點得值
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc .getElementsByTagName("title")[0].childNodes[0];
x.nodeValue="Easy Cooking";
改變屬性的值
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc .getElementsByTagName("book");
x[0].setAttribute("category","food");
刪除元素節點
xmlDoc = loadXMLDoc("books.xml");
y = xmlDoc.getElementsByTagName("books")[0];
xmlDoc.documentElement.removeChild(y);
刪除自身
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("book")[0];
x.parentNode.removeChild(x);
刪除文字節點
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("title")[0];
y = x.childNodes[0];
x.removeChild(y);
清空文字節點
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("title")[0];
x.nodeValue = ""；
根據名稱刪除屬性節點
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("book");
x[0].removeAttribute('category');
根據物件刪除屬性節點
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("book");
for(var i=0;i<x.length;i++){
while(x[i].attributes.length>0){
attnode=x[i].attributes[0];
old_att=x[i].removeAttributeNode(attnode);
}
}
x[0].removeAttribute(category);
程式碼
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->替換元素節點
replaceChild() 方法用於替換節點。
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.documentElement;
//create a book element, title element and a text node
newNode = xmlDoc.createElement("book");
newTitle = xmlDoc.createElement("title");
newText = xmlDoc.createTextNode("A Notebook");
//add the text node to the title node,
newTitle.appendChild(newText);
//add the title node to the book node
newNode.appendChild(newTitle);
y = xmlDoc.getElementsByTagName("book")[0];
//replace the first book node with the new node
x.replaceChild(newNode,y);
替換文字節點中的資料
replaceData()方法用於替換文字節點中的資料。
replaceData()方法有三個引數：
offset-在何處開始替換字元。Offset值以0開始。
length-要替換多少字元。
string-要插入的字串。
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("title")[0].childNodes[0];
x.replaceDate(0,8,"Easy");
用nodeValue屬性來替換文字節點中的資料。
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("title")[0].childNodes[0];
x.nodeValue="Easy Italian";
建立新的元素節點
createElement()方法建立新的元素節點。
xmlDoc = loadXMLDoc("books.xml");
newNode = xmlDoc.createElement("edition");
x = xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newNode);
建立新的屬性節點
xmlDoc = loadXMLDoc("books.xml");
newAtt = xmlDoc.createAttribute("edition");
newAtt.nodeValue ="first";
x = xmlDoc.getElementsByTagName("title");
x[0].setAttributeNode(newAtt);
通過setAttribute建立屬性。
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("book");
x[0].setAttribute("edition","first");
建立文字節點
createTextNode()方法建立新的文字節點。
xmlDoc = loadXMLDoc("books.xml");
newNode = xmlDoc.createElement("publisher");
newText = xmlDoc.createTextNode("english");
newNode.appendChild(newText);
x = xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newNode);
建立一個CDATA Section節點
xmlDoc = loadXMLDoc("books.xml");
newCDATA = xmlDoc.createCDATASection("Special offer & Book Sale");
x = xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newCDATA);
建立註釋節點
xmlDoc = loadXMLDoc("books.xml");
newComment = xmlDoc.createComment("Revised March 2008");
x=xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newComment);
新增節點
xmlDoc = loadXMLDoc("books.xml");
newNode = xmlDoc.createElement("publisher");
x = xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newNode);
插入節點--insertBefore()
xmlDoc = loadXMLDoc("books.xml");
newNode = xmlDoc.createElement("book");
x = xmlDoc.documentElement;
y = xmlDoc.getElementsByTagName("book")[3];
x.insertBefore(newNode,y);
新增新屬性
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("book");
x[0].setAttribute("edition","first");
向文字節點新增文字--insertData()
xmlDoc = loadXMLDoc("books.xml");
x = xmlDoc.getElementsByTagName("title")[0].childNodes[0];
x.insertData(0,"Easy");
複製節點
xmlDoc = loadXMLDoc("books.xml");
oldNode = xmlDoc.getElementsByTagName("book")[0];
newNOde = oldNode.cloneNode(true);
xmlDoc.documentElement.appendChild(newNode);
//output all titles
y = xmlDoc.getElementsByTagName("title");
for(var i=0;i<y.length;i++){
document.write(y[i].childNodes[0].nodeValue);
document.write("<br/>");
}