我能够将 JTextArea unicode (devanagari) 内容加载/保存到文件中。我想将内容打印到 pdf 文件，所以我使用 iTextPDF api。我的代码片段如下，它打印空文件而不是内容。
package i18n;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import com.itextpdf.awt.PdfGraphics2D;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfWriter;
public class MyNumbers extends JFrame {
private ResourceBundle rb;
private Font devanagariFont;
public MyNumbers (String language, String fontFile) {
loadResourceBundle(language);
loadFont(fontFile);
display();
}
TextArea txtArea;
private void display() {
String unicode = null;
JPanel labels = new JPanel(new GridLayout(0,2));
JLabel uni = null;
for(int i=0; i<=10; i++) {
unicode = rb.getString("" +i);
labels.add(new JLabel("" + i));
labels.add(uni = new JLabel(unicode));
//uni.setFont(devanagariFont);
}
labels.add(new JLabel("Time"));
labels.add(new ClockLabel());
getContentPane().setLayout(new FlowLayout());
Box b = Box.createVerticalBox();
b.add(labels);
b.add(txtArea = new TextArea(10, 40));
getContentPane().add(b);
addWindowListener(new WindowAdapter() {
@Override
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
try {
getInputContext().selectInputMethod(new Locale("hi", "IN"));
read();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
try {
System.out.println(getInputContext().getLocale());
save();
print();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
System.exit(0);
}
});
//setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
setVisible(true);
}
String fileName = "MyNumbers.txt";
private void save() throws IOException {
File f = new File(fileName);
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(f), "UTF-16"));
String txt = txtArea.getText();
writer.write(txt);
writer.flush();
writer.close();
}
private void read() throws IOException {
File f = new File(fileName);
if(f.exists() == false) return;
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(f), "UTF-16"));
String line = null;
while((line = reader.readLine()) != null) {
txtArea.append(line + "\n");
}
reader.close();
}
private void loadFont(String fontFile) {
try {
InputStream input = getClass().getResourceAsStream(fontFile);
Font b = Font.createFont(Font.TRUETYPE_FONT, input);
devanagariFont = b.deriveFont(Font.PLAIN, 11);
} catch(Exception e) {
e.printStackTrace();
}
}
private void loadResourceBundle(String language) {
String base = getClass().getName() + "rb";
rb = ResourceBundle.getBundle(base, new Locale(language));
}
static class ClockLabel extends JLabel implements ActionListener {
private ClockLabel() {
new Timer(1000, this).start();
}
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
public void actionPerformed(ActionEvent e) {
Calendar cal = Calendar.getInstance();
setText(sdf.format(cal.getTime()));
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new MyNumbers("hi", "Devnew.ttf");
}
});
}
String pdfFileName = "MyNumbers.pdf";
private void print() {
System.out.println("Printing PDF file ..");
try {
Document document = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(pdfFileName));
document.open();
PdfContentByte cb = writer.getDirectContent( );
PdfGraphics2D g2d = new PdfGraphics2D(cb, PageSize.A4.getWidth(), PageSize.A4.getHeight());
System.out.println(txtArea.getSize());
txtArea.print(g2d);
g2d.dispose();
document.close ();
}
catch(DocumentException de) {
System.err.println(de.getMessage());
}
catch(IOException ioe) {
System.err.println(ioe.getMessage());
}
}
}
输出到控制台：
hi_IN
Printing PDF file ..
java.awt.Dimension[width=300,height=170]
请让我知道修复。假设摇摆 JTextArea 应该能够处理它，我没有为图形设置任何字体。使用 indicim.jar 输入法框架添加了 unicode 支持。根据 Dimension 上方的输出，显示文本区域的大小不为零。
为了进行上述测试，您需要 2 个文件：
indicim.jar并将其放在 jre/lib/ext
MyNumbers.txt - 梵文中的 unicode 内容文件，如下所示，您可以自己在文本区域中键入它，并在关机/启动时保存/加载程序。你把它保存在eclipse的项目目录中。
अम२ जवान
अम२ जवान
अम२ जवान
अम२ जवान
अम२ जवान
अम२ जवान
अम२ जवान
अम२ जवान
अम२ जवान
ऊँ
将在 Eclipse 项目目录中创建一个 pdf 文件，但现在它是空的。