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我有ReadXMLFile獲取數據，我將數據保存到ArrayList，然後從此ArrayList打印表格，單元格可編輯，我想編輯單元格或刪除行，那麼我應該如何是否將結果保存到XML？另外我想更新表格，當xml文件將通過例子在記事本外被修改。編輯jTable並將結果保存到XML
package net.kxyz;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.util.ArrayList;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
/**
*
* @author kuman
*/
public class Table extends javax.swing.JPanel {
ReadXMLFile readXMLFile = new ReadXMLFile();
/**
* Creates new form Table
*/
private boolean DEBUG = false;
public Table() {
super(new GridLayout(1, 0));
System.out.println("SIEMANKO TABLE");
readXMLFile.Read();
ArrayList<Book> list = readXMLFile.getBook();
list.add(new Book("3", "TYT", "AYUT", "231423"));
list.get(0);
JTable table = new JTable(new MyTableModel(list));
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
table.isCellEditable(0, 0);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
}// </editor-fold>
// Variables declaration - do not modify
// End of variables declaration
}
class MyTableModel extends AbstractTableModel {
private String[] columnNames = { "ID", "Title", "Author",
"Year", "State" };
ArrayList<Book> list = null;
MyTableModel(ArrayList<Book> list) {
this.list = list;
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return list.size();
}
public String getColumnName(int col) {
return columnNames[col];
}
public Object getValueAt(int row, int col) {
Book object = list.get(row);
switch (col) {
case 0:
return object.id;
case 1:
return object.title;
case 2:
return object.author;
case 3:
return object.year;
case 4:
return object.state;
default:
return "unknown";
}
}
@Override
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
boolean[] canEdit = new boolean[]{
false, false, true, false, true,
};
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit[columnIndex];
}
public void setValueAt(Object value, int row, int col){
switch (col) {
case 0:
// id not editable list.get(row).setId((int)value);
case 1:
list.get(row).setTitle((String)value);
break;
case 2:
list.get(row).setAuthor((String)value);
break;
case 3:
list.get(row).setYear((String)value);
break;
case 4:
list.get(row).setState(Boolean.valueOf((String)value));
break;
}
fireTableCellUpdated(row, col);
}
}
ReadXMLFile.class
package net.kxyz;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
/**
*
* @author kuman
*/
public class ReadXMLFile {
File fXmlFile = new File("/baza.xml");
public ArrayList<Book> getBook() {
return book;
}
ArrayList<Book> book = new ArrayList<>() ;
public void Read() {
try {
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
doc.getDocumentElement().normalize();
System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("book");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
System.out.println("\nReading node :" + nNode.getNodeName());
Book tempBook = new Book();
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
tempBook.setId(eElement.getAttribute("id"));
tempBook.setTitle(eElement.getElementsByTagName("title").item(0).getTextContent());
tempBook.setAuthor(eElement.getElementsByTagName("author").item(0).getTextContent());
tempBook.setYear(eElement.getElementsByTagName("year").item(0).getTextContent());
tempBook.setState(Boolean.valueOf(eElement.getElementsByTagName("state").item(0).getTextContent()));
System.out.println("TEMP : " + temp);
System.out.println("id : " + tempBook.getId());
System.out.println("title : " + tempBook.getTitle());
System.out.println("author : " + tempBook.getAuthor());
System.out.println("year : " + tempBook.getYear());
System.out.println("state : " + tempBook.isState());
book.add(temp, tempBook);
}
}
} catch (ParserConfigurationException | SAXException | IOException e) {
e.printStackTrace();
}
}
}
Book.class
package net.kxyz;
/**
*
* @author kuman
*/
public class Book {
String id;
String title;
String author;
String year;
Boolean state;
public Book() {};
public Book(String id, String title, String author, String year) {
this.id = id ;
this.title = title;
this.author = author;
this.year = year;
this.state = true;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public Boolean isState() {
return state;
}
public void setState(Boolean state) {
this.state = state;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
}