我需要用java创建一个半透明的swing窗口，其中有一个表格和一个按钮。表格内容是从xml文件导入的。我的代码是这样的
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import static java.awt.GraphicsDevice.WindowTranslucency.*;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
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;
import org.xml.sax.helpers.DefaultHandler;
public class Swings extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
public File xml = null;
public Document dom = null;
public JScrollPane jScrollPane1;
public DefaultTableModel model;
public JTable jTable1;
public JButton update_button;
public Swings() {
setUndecorated(true);
setBackground(new Color(0, 0, 0, 0));
setSize(new Dimension(600, 500));
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// statusLabel.setSize(350,100);
JPanel panel = new JPanel() {
private static final long serialVersionUID = 1L;
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (g instanceof Graphics2D) {
final int R = 220;
final int G = 220;
final int B = 250;
Paint p = new GradientPaint(0.0f, 0.0f, new Color(R, G, B, 0), 0.0f, getHeight(), new Color(R, G, B, 255), true);
Graphics2D g2d = (Graphics2D) g;
g2d.setPaint(p);
g2d.fillRect(0, 0, getWidth(), getHeight());
Font font = new Font("Serif", Font.PLAIN, 45);
g2d.setFont(font);
g2d.Color(Color.red);
g2d.drawString("Service Now Notification", 40, 120);
}
}
};
xml = new File(System.getProperty("user.dir") + File.separator + "Html1.xml");
installGUI();
setContentPane(panel);
setLayout(new GridBagLayout());
add(jtable1);
add(update_button);
}
public void installGUI() {
Container ctr = getContentPane();
ctr.setLayout(new BorderLayout());
model = new DefaultTableModel() {
private static final long serialVersionUID = 1L;
public boolean isCellEditable(int row, int column) {
return false;
}
};
// creates an instance of the table class and sets it up in a scrollpane
jTable1 = new JTable(model);
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
jScrollPane1 = new JScrollPane(jTable1);
ctr.add(BorderLayout.CENTER, jScrollPane1);
// add some columns
model.addColumn("Number");
model.addColumn("Priority");
model.addColumn("State");
model.addColumn("Assigned");
model.addColumn("Short_desc");
model.addColumn("Task");
if (xml.exists() && xml.length() != 0) {
dom = parseFile(xml);
insertTableRows(model, dom);
}
}
// creates an instance of a Document object
public Document parseFile(File file) {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
dom = (Document) builder.parse(file);
}
catch (Exception e) {
e.printStackTrace();
}
return dom;
}
public void insertTableRows(DefaultTableModel tableModel, Document doc) {
Element root = doc.getDocumentElement();
NodeList list = root.getElementsByTagName("MS");
for (int i = 0; i < list.getLength(); ++i) {
Element e = (Element) list.item(i);
if (e.getNodeType() == Element.ELEMENT_NODE) {
Object[] row = { getArticleInfo("S", e) };
tableModel.addRow(row);
}
}
tableModel.fireTableStructureChanged();
tableModel.fireTableDataChanged();
}
public Object getArticleInfo(String tagName, Element elem) {
NodeList list = elem.getElementsByTagName(tagName);
for (int i = 0; i < list.getLength(); ++i) {
Node node = (Node) list.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
Node child = (Node) node.getFirstChild();
return child.getTextContent().trim();
}
return null;
}
return null;
}
public static void main(String[] args) {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
boolean isPerPixelTranslucencySupported = gd.isWindowTranslucencySupported(PERPIXEL_TRANSLUCENT);
if (!isPerPixelTranslucencySupported) {
System.out.println("Per-pixel translucency is not supported");
System.exit(0);
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Swing gtw = new Swing();
// gtw.runn();
gtw.setVisible(true);
}
});
}
}
xml文件内容是这样的:
<Objs Version="1.1.0.1" xmlns="http://schemas.microsoft.com/powershell/2004/04">
<Obj RefId="0">
<TN RefId="0">
<T>Selected.System.Management.Automation.PSCustomObject</T>
<T>System.Management.Automation.PSCustomObject</T>
<T>System.Object</T>
</TN>
<MS>
<S N="Number">INC0811168</S>
<S N="Priority">2 - High</S>
<S N="State">Assigned</S>
<S N="Assigned">New</S>
<S N="Short_desc">Review Ad-Hoc Service Request for Lavon A Gudmundson</S>
<S N="Task">Catalog Task</S>
</MS>
</Obj>
</Objs>
我收到一个半透明的通知窗口，其中有一个按钮作为输出。
最佳答案
暂时忽略透明窗口(看来您已经弄清楚了)，基本上有两种方法可以实现您想要实现的目标，具体取决于您想要实现的目标，但是，基本方法读取 XML 文件保持不变...
您可以将 XML 数据预加载到匹配的 POJO 中，并将它们添加到某种管理结构中(例如 List)，并将这些值应用到 TableModel 或将 TableModel 模型包装在 XML 文档本身周围，并让它管理整个过程...
这个示例执行了后者，但将加载过程分开并执行前者并不需要太多...
import java.awt.EventQueue;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class XMLTableExample {
public static void main(String[] args) {
new XMLTableExample();
}
public XMLTableExample() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JTable table = new JTable();
try {
table.setModel(new XMLTableModel(new File("Html1.xml")));
} catch (ParserConfigurationException | SAXException | IOException | XPathExpressionException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(table));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public static class XMLTableModel extends AbstractTableModel {
protected static final String[] COLUMN_NAMES = {
"Number",
"Priority",
"State",
"Assigned",
"Description",
"Task"
};
private List<MSEntity> rows;
public XMLTableModel(File file) throws ParserConfigurationException, SAXException, IOException, XPathExpressionException {
rows = new ArrayList<>(25);
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse(file);
setDocument(dom);
}
protected String getMSValue(Node msNode, String name) throws XPathExpressionException {
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expression = xpath.compile("S[@N='" + name + "']");
Node sNode = (Node)expression.evaluate(msNode, XPathConstants.NODE);
return sNode != null ? sNode.getTextContent() : null;
}
@Override
public int getRowCount() {
return rows.size();
}
@Override
public int getColumnCount() {
return COLUMN_NAMES.length;
}
@Override
public String getColumnName(int column) {
return COLUMN_NAMES[column];
}
@Override
public Class<?> getColumnClass(int columnIndex) {
return String.class;
}
public MSEntity getEntityAtRow(int row) {
return rows.get(row);
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
MSEntity entity = getEntityAtRow(rowIndex);
Object value = null;
switch (columnIndex) {
case 0:
value = entity.getNumber();
break;
case 1:
value = entity.getPriority();
break;
case 2:
value = entity.getState();
break;
case 3:
value = entity.getAssigned();
break;
case 4:
value = entity.getDesc();
break;
case 5:
value = entity.getTask();
break;
}
return value;
}
public void setDocument(Document dom) throws XPathExpressionException {
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expression = xpath.compile("/Objs/Obj/MS");
NodeList nl = (NodeList)expression.evaluate(dom, XPathConstants.NODESET);
for (int index = 0; index < nl.getLength(); index++) {
Node node = nl.item(index);
String number = getMSValue(node, "Number");
String priority = getMSValue(node, "Priority");
String state = getMSValue(node, "State");
String assigned = getMSValue(node, "Assigned");
String desc = getMSValue(node, "Short_desc");
String task = getMSValue(node, "Task");
MSEntity entity = new MSEntity(number, priority, state, assigned, desc, task);
rows.add(entity);
}
fireTableDataChanged();
}
public class MSEntity {
private final String number;
private final String priority;
private final String state;
private final String assigned;
private final String desc;
private final String task;
public MSEntity(String number, String priority, String state, String assigned, String desc, String task) {
this.number = number;
this.priority = priority;
this.state = state;
this.assigned = assigned;
this.desc = desc;
this.task = task;
}
public String getAssigned() {
return assigned;
}
public String getDesc() {
return desc;
}
public String getNumber() {
return number;
}
public String getPriority() {
return priority;
}
public String getState() {
return state;
}
public String getTask() {
return task;
}
}
}
}
您可能想了解有关透明方法的一些注意事项...JScrollPane 是不透明的，JViewport 是不透明的，JTable是不透明的。如果您希望看到抛出这些组件，则必须更改这些状态
关于java - 在半透明 Swing 窗口内创建 jtable，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25032052/