我按照以下链接查看 PDF 文件。 Java Swing PDF 查看器。
现在我需要添加一个搜索按钮JFrame（除了导航按钮）。单击该搜索按钮应打开一个带有文本字段的标签。当客户端在该文本字段中输入值时，它应该在整个 PDF 中执行搜索，并在文本字段下方显示匹配单词的计数。我对摇摆非常陌生，并试图从 3 天内找到解决方案。但我没有得到确切的解决方案。这对我来说非常紧迫。任何帮助是极大的赞赏。
第一次编辑：
public class PdfViewer extends JPanel {
private static enum Navigation {
GO_FIRST_PAGE, FORWARD, BACKWARD, GO_LAST_PAGE, GO_N_PAGE
}
private static final CharMatcher POSITIVE_DIGITAL = CharMatcher.anyOf("0123456789");
private static final String GO_PAGE_TEMPLATE = "%s of %s";
private static final int FIRST_PAGE = 1;
private int currentPage = FIRST_PAGE;
private JButton btnFirstPage;
private JButton btnPreviousPage;
private JTextField txtGoPage;
private JButton btnNextPage;
private JButton btnLastPage;
private JButton print;
private JButton search;
private PagePanel pagePanel;
private PDFFile pdfFile;
public PdfViewer() {
initial();
}
private void initial() {
setLayout(new BorderLayout(0, 0));
JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
add(topPanel, BorderLayout.NORTH);
btnFirstPage = createButton("|<<");
topPanel.add(btnFirstPage);
btnPreviousPage = createButton("<<");
topPanel.add(btnPreviousPage);
txtGoPage = new JTextField(10);
txtGoPage.setHorizontalAlignment(JTextField.CENTER);
topPanel.add(txtGoPage);
btnNextPage = createButton(">>");
topPanel.add(btnNextPage);
btnLastPage = createButton(">>|");
topPanel.add(btnLastPage);
search = new JButton("search");
topPanel.add(search);
JScrollPane scrollPane = new JScrollPane();
add(scrollPane, BorderLayout.CENTER);
JPanel viewPanel = new JPanel(new BorderLayout(0, 0));
scrollPane.setViewportView(viewPanel);
pagePanel = new PagePanel();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
pagePanel.setPreferredSize(screenSize);
viewPanel.add(pagePanel, BorderLayout.CENTER);
disableAllNavigationButton();
btnFirstPage.addActionListener(new PageNavigationListener(Navigation.GO_FIRST_PAGE));
btnPreviousPage.addActionListener(new PageNavigationListener(Navigation.BACKWARD));
btnNextPage.addActionListener(new PageNavigationListener(Navigation.FORWARD));
btnLastPage.addActionListener(new PageNavigationListener(Navigation.GO_LAST_PAGE));
txtGoPage.addActionListener(new PageNavigationListener(Navigation.GO_N_PAGE));
search.addActionListener(new Action1());
}
static class Action1 implements ActionListener {
public void actionPerformed (ActionEvent e) {
JFrame parent = new JFrame();
JDialog jDialog = new JDialog();
Label label = new Label("Search: ");
final JTextField jTextField = new JTextField(10);
JPanel panel = new JPanel();
parent.add(panel);
panel.add(label);
panel.add(jTextField);
parent.setVisible(true);
parent.setSize(800,400);
parent.setLocationRelativeTo(null);
}
}
}
这是我修改过的代码。其余代码与链接中的代码相同。使用此代码，我在 JFrame 中获得了一个搜索按钮。当我单击该按钮时，它会打开一个窗口，其中搜索作为标签名称和一个文本字段。所以现在我在这里被打动了。当我在该文本字段中输入一个值时，它应该使用文本字段值在整个 pdf 中执行搜索，并在该文本字段下方显示匹配的计数。
第二次编辑：
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Label;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import com.google.common.base.CharMatcher;
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PagePanel;
public class PdfViewer extends JPanel {
private static enum Navigation {
GO_FIRST_PAGE, FORWARD, BACKWARD, GO_LAST_PAGE, GO_N_PAGE
}
private static final CharMatcher POSITIVE_DIGITAL = CharMatcher.anyOf("0123456789");
private static final String GO_PAGE_TEMPLATE = "%s of %s";
private static final int FIRST_PAGE = 1;
private int currentPage = FIRST_PAGE;
private JButton btnFirstPage;
private JButton btnPreviousPage;
private JTextField txtGoPage;
private JButton btnNextPage;
private JButton btnLastPage;
private JButton print;
private JButton search;
private PagePanel pagePanel;
private static PDFFile pdfFile;
static String text;
public PdfViewer() {
initial();
}
private void initial() {
setLayout(new BorderLayout(0, 0));
JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
add(topPanel, BorderLayout.NORTH);
btnFirstPage = createButton("|<<");
topPanel.add(btnFirstPage);
btnPreviousPage = createButton("<<");
topPanel.add(btnPreviousPage);
txtGoPage = new JTextField(10);
txtGoPage.setHorizontalAlignment(JTextField.CENTER);
topPanel.add(txtGoPage);
btnNextPage = createButton(">>");
topPanel.add(btnNextPage);
btnLastPage = createButton(">>|");
topPanel.add(btnLastPage);
search = new JButton("search");
topPanel.add(search);
JScrollPane scrollPane = new JScrollPane();
add(scrollPane, BorderLayout.CENTER);
JPanel viewPanel = new JPanel(new BorderLayout(0, 0));
scrollPane.setViewportView(viewPanel);
pagePanel = new PagePanel();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
pagePanel.setPreferredSize(screenSize);
viewPanel.add(pagePanel, BorderLayout.CENTER);
// disableAllNavigationButton();
search.addActionListener(new Action1());
}
private JButton createButton(String string) {
return new JButton(string);
}
class Action1 implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
JDialog jDialog = new JDialog(SwingUtilities.getWindowAncestor(search));
Label label = new Label("Search: ");
final JTextField jTextField = new JTextField(10);
jTextField.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Here perform search in PDF
text = jTextField.getText();
search(pdfFile,text);
System.out.println("Search for text " + jTextField.getText() + " requested");
}
});
// If you want to react to every change of text in the textfield, you can
// use a DocumentListener and invoke the search method for all events.
jTextField.getDocument().addDocumentListener(new DocumentListener() {
@Override
public void removeUpdate(DocumentEvent e) {
}
@Override
public void insertUpdate(DocumentEvent e) {
}
@Override
public void changedUpdate(DocumentEvent e) {
}
});
JPanel panel = new JPanel();
jDialog.add(panel);
panel.add(label);
panel.add(jTextField);
jDialog.pack();
jDialog.setLocationRelativeTo(search);
jDialog.setVisible(true);
}
}
public static void search(PDFFile pdffile2,String text) {
System.out.println("Inside searh" +text);
System.out.println("Inside Search Page ::::::::" + pdffile2.getNumPages()); //43 pages
for (int i = 0;i <= pdffile2.getNumPages(); i++) {
PDFPage pdfPage = pdffile2.getPage(i);
if(pdfPage.equals(text)) {
System.out.println("equal");
}
else{
System.out.println("Not Equal");
}
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame();
frame.add(new PdfViewer());
frame.pack();
frame.setVisible(true);
}
});
}
}