Question

急求一个用Java实现的打印及打印预览功能的Demo

Answer 1

package com.szallcom.tools;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.awt.print.PageFormat;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;

import wf.common.SystemProperties;

public class PrintPreviewDialog extends JDialog implements ActionListener{

private JButton nextButton = new JButton("Next");
private JButton previousButton = new JButton("Previous");
private JButton closeButton = new JButton("Close");
private JPanel buttonPanel = new JPanel();
private PreviewCanvas canvas;

public PrintPreviewDialog(Frame parent, String title, boolean modal,
PrintTest pt, String str) {
super(parent, title, modal);
canvas = new PreviewCanvas(pt, str);
setLayout();
}

private void setLayout() {
this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(canvas, BorderLayout.CENTER);

nextButton.setMnemonic('N');
nextButton.addActionListener(this);
buttonPanel.add(nextButton);
previousButton.setMnemonic('N');
previousButton.addActionListener(this);
buttonPanel.add(previousButton);
closeButton.setMnemonic('N');
closeButton.addActionListener(this);
buttonPanel.add(closeButton);
this.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
this.setBounds((int) ((SystemProperties.SCREEN_WIDTH - 400) / 2),
(int) ((SystemProperties.SCREEN_HEIGHT - 400) / 2), 400, 400);
}

public void actionPerformed(ActionEvent evt) {
Object src = evt.getSource();
if (src == nextButton)
nextAction();
else if (src == previousButton)
previousAction();
else if (src == closeButton)
closeAction();
}

private void closeAction() {
this.setVisible(false);
this.dispose();
}

private void nextAction() {
canvas.viewPage(1);
}

private void previousAction() {
canvas.viewPage(-1);
}

class PreviewCanvas extends JPanel {
private String printStr;
private int currentPage = 0;
private PrintTest preview;

public PreviewCanvas(PrintTest pt, String str) {
printStr = str;
preview = pt;
}

public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
PageFormat pf = PrinterJob.getPrinterJob().defaultPage();

double xoff;
double yoff;
double scale;
double px = pf.getWidth();
double py = pf.getHeight();
double sx = getWidth() - 1;
double sy = getHeight() - 1;
if (px / py < sx / sy) {
scale = sy / py;
xoff = 0.5 * (sx - scale * px);
yoff = 0;
} else {
scale = sx / px;
xoff = 0;
yoff = 0.5 * (sy - scale * py);
}
g2.translate((float) xoff, (float) yoff);
g2.scale((float) scale, (float) scale);

Rectangle2D page = new Rectangle2D.Double(0, 0, px, py);
g2.setPaint(Color.white);
g2.fill(page);
g2.setPaint(Color.black);
g2.draw(page);

try {
preview.print(g2, pf, currentPage);
} catch (PrinterException pe) {
g2.draw(new Line2D.Double(0, 0, px, py));
g2.draw(new Line2D.Double(0, px, 0, py));
}
}

public void viewPage(int pos) {
int newPage = currentPage + pos;
if (0 <= newPage && newPage < preview.getPagesCount(printStr)) {
currentPage = newPage;
repaint();
}
}
}
}

package wf.common;

import java.awt.Dimension;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.Toolkit;

public final class SystemProperties {

public static final double SCREEN_WIDTH = Toolkit.getDefaultToolkit().getScreenSize().getWidth();
public static final double SCREEN_HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().getHeight();
public static final String USER_DIR = System.getProperty("user.dir");
public static final String USER_HOME = System.getProperty("user.home");
public static final String USER_NAME = System.getProperty("user.name");
public static final String FILE_SEPARATOR = System.getProperty("file.separator");
public static final String LINE_SEPARATOR = System.getProperty("line.separator");
public static final String PATH_SEPARATOR = System.getProperty("path.separator");
public static final String JAVA_HOME = System.getProperty("java.home");
public static final String JAVA_VENDOR = System.getProperty("java.vendor");
public static final String JAVA_VENDOR_URL = System.getProperty("java.vendor.url");
public static final String JAVA_VERSION = System.getProperty("java.version");
public static final String JAVA_CLASS_PATH = System.getProperty("java.class.path");
public static final String JAVA_CLASS_VERSION = System.getProperty("java.class.version");
public static final String OS_NAME = System.getProperty("os.name");
public static final String OS_ARCH = System.getProperty("os.arch");
public static final String OS_VERSION = System.getProperty("os.version");
public static final String[] FONT_NAME_LIST = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
public static final Font[] FONT_LIST = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
}

追问

我想要的是一个B/s模式的

Answer 2

用个小插件就哦了

追问

你用POI写过么?或者其它的也行,给个例子