Java打印

时间:2022-10-17 19:39:23

Java打印

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
public class Print implements Printable {
int m_wPage;
int m_hPage;
int m_orientation;
Printable m_target;
int maxNumPage = 1;
String title = "数据表格打印";
Font titleFont = new Font("黑体", Font.BOLD, 14);
boolean hasTail = true;
int tailAlign = 0;
int headAlign = 0;
int topSpace = 0;
int leftSpace = 0;
int yStart = 0;
int yEnd = 0;
int xStart = topSpace;
int xEnd = 0;
int x = 0, y = 0;
String strTemp = "打印内容";
public void doPrint() {
try {
m_orientation = PageFormat.PORTRAIT; // 竖向打印
m_orientation = PageFormat.LANDSCAPE; // 横向打印
// 设置打印对象,默认纸张
PrinterJob prnJob = PrinterJob.getPrinterJob(); PageFormat pageFormat = prnJob.defaultPage();
pageFormat.setOrientation(m_orientation);
m_wPage = (int) (pageFormat.getWidth()); // 竖向595
m_hPage = (int) (pageFormat.getHeight()); // 竖向841
// 将待打印的窗体根据默认纸张设置传入打印对象
prnJob.setPrintable(this, pageFormat);
if (!prnJob.printDialog())
return;
prnJob.print();
} catch (PrinterException ex) {
ex.printStackTrace();
System.err.println("打印错误:" + ex.toString());
}
}
/**
* 初始化打印参数
*/
public void initPrintParameter() {}
/**
* 构造打印内容,以送打印机打印
*/
public int print(Graphics pg, PageFormat pageFormat, int pageIndex) throws PrinterException {
if(pageIndex>0){ // 保证只打印一页;
return NO_SUCH_PAGE;
}
// 初始化打印参数
initPrintParameter();
// 将画布设置为页面大小
pg.translate((int) pageFormat.getImageableX(), (int) pageFormat.getImageableY());
int wPage = 0;
int hPage = 0;
// 根据打印机页面设置调整画布大小
if (pageFormat.getOrientation() == pageFormat.PORTRAIT) {
wPage = (int) pageFormat.getImageableWidth(); // 竖向451
hPage = (int) pageFormat.getImageableHeight(); // 竖向697
} else {
wPage = (int) pageFormat.getImageableWidth();
//wPage += wPage / 2; // 为什么加增加一半?
hPage = (int) pageFormat.getImageableHeight();
pg.setClip(0, 0, wPage, hPage);
}
wPage = wPage - 2 * leftSpace;
hPage = hPage - 2 * topSpace;
xStart = leftSpace;
xEnd = wPage - 2;
// 为画布设置颜色和字体
int y = topSpace;
pg.setFont(titleFont);
pg.setColor(Color.black);
// 画标题,并使其居中
Font fn = pg.getFont();
FontMetrics fm = pg.getFontMetrics();
y += fm.getAscent();
alignText(title, pg, y, xStart, xEnd, headAlign);
y += 30;
x = leftSpace + 2;
Font headerFont = new Font("宋体", Font.BOLD, 14);
pg.setFont(headerFont);
fm = pg.getFontMetrics();
int h = fm.getAscent();
yStart = y - 1;
y += h;
pg.setFont(headerFont);
fm = pg.getFontMetrics();
int header = y;
h = fm.getHeight();
// 计算行高,每页行数,总行数和指定页码的起始行、结束行
int rowH = Math.max(h, 10);
int tailH = rowH + 30;
int rowPerPage = 0;
int leftPix = 0;
if (hasTail) {
rowPerPage = (hPage - header - tailH) / rowH;
leftPix = (hPage - header - tailH) % rowH;
yEnd = hPage - leftPix - tailH + 2;
} else {
rowPerPage = (hPage - header) / rowH;
leftPix = (hPage - header) % rowH;
yEnd = hPage - leftPix + 2;
}
pg.drawString(strTemp, x, y);
// 画表格边框
pg.drawLine(xStart, yStart, xStart, yEnd);
pg.drawLine(xStart, yStart, xEnd, yStart);
pg.drawLine(xEnd, yStart, xEnd, yEnd);
pg.drawLine(xStart, yEnd, xEnd, yEnd);
// 打印页码
if (hasTail) {
int pageNumber = pageIndex + 1;
String s = "第" + pageNumber + "页";
alignText(s, pg, yEnd + 30, xStart, xEnd, tailAlign);
}
System.gc();
return PAGE_EXISTS;
}
/**
* 文字排列,坐标在y处,显示范围(start-end) 0表示居中显示,1表示左对齐,2表示右对齐
*/
private void alignText(String s, Graphics pg, int y, int start, int end, int mode) {
Font fn = pg.getFont();
FontMetrics fm = pg.getFontMetrics();
int wString = fm.stringWidth(s);
int x = start;
switch (mode) {
case 0:
if ((end - start - wString) > 0)
x = start + (end - start - wString) / 2;
break;
case 1:
break;
case 2:
if ((end - start - wString) > 0)
x = start + (end - start - wString);
break;
}
pg.drawString(s, x, y);
}
public static void main(String[] args) {
Print p = new Print();
p.doPrint();
}
}