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好吧,我正在研究計算某些內容的程序,然後將該數據添加到同一目錄中的現有XML文件。我已經使用DocumentBuilder解析文件,現在需要(至少這是我認爲我需要做的,請改正我,我錯了)從parsered文件中獲取元素,並將appendChild另一個元素添加到它。使用parsered Java DOM XML中的元素添加新元素
這裏是到目前爲止的代碼 進口包:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.text.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamSource;
和功能,實際上解析器和編輯XML文件:當我嘗試在這裏編譯這段代碼
public void saveIt(){
DocumentBuilder bd = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = bd.parse("excersize.xml");
Element root = doc.getElementsByTagName("root");
Element today = doc.createElement(today);
root.appendChild(today);
}
我得到的錯誤(fyi,這是一個定製的cmd):
Good Luck Sir: javac excersize.java
excersize.java:240: error: incompatible types
Element root = doc.getElementsByTagName("root");
^
required: Element
found: NodeList
excersize.java:241: error: method createElement in interface Document cannot be
applied to given types;
Element today = doc.createElement(today);
^
required: String
found: Element
reason: actual argument Element cannot be converted to String by method invoca
tion conversion
2 errors