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JTable Print
Author: 小权这几天在做关于JTable的打印工作，项目中客户需要直接将JTable打印出来，之前这方面工作做的比较少，经过这几天的研究，稍微有些积累，现在分享一下。
JTable打印目前用的比较多的还是JasperReport来实现的，JasperReport开源免费，但是不是特别好用，这也是为什么JasperReport免费用，但是培训是收费的。
不过常用的一些JTable的打印实现起来也还好了，只是复杂的稍微有些麻烦，可以看看我之前介绍的一篇入门文章：JasperReport 个人使用的一些经验
这里主要分享的是通过Swing 打印的积累，JasperReport常用的简单的打印没问题，但是遇上比较复杂的表单，比如合成表头等，就稍微有点麻烦，当然也有可能是自己没有找到JasperReport的处理方法，要是有朋友知道欢迎分享下。
通过Swing来绘制，应该是无奈的一步，不过通过这无奈的一步，和同事的帮助下，却学习到了不少这方面的知识，尤其是Swing绘制方面的。
下面的代码是我抽出来的一个比较通用的，基于TableModel的表格打印，普通表头，不带合成表头的，如果Table Model不一样，那么自己就需要改改了。
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;
import java.math.BigDecimal;
import java.text.NumberFormat;
import javax.swing.JTable;
import javax.swing.table.TableModel;
/**
*
* @author xiaoquan
*/
public class SwingCommonPrinitTools implements Printable {
private TableModel model = null;
private String info;
private int totalRow = 0;
private static final int LEFT = 0;
private static final int RIGHT = 1;
private static final int CENTER = 2;
private static final int AUTO = 3;
public void printTable(TableModel model,
String info) {
this.model = model;
this.info = info;
totalRow = model.getRowCount();
PrinterJob printJob = PrinterJob.getPrinterJob();
printJob.setPrintable(this);
if (printJob.printDialog()) {
try {
printJob.print();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
private static final double paper_offset_x = 20;
private static final double paper_offset_y = 20;
private static final double title_time_margin = 10;
private static final double time_body_margin = 2;
private static final double cell_padding_y = 3;
private static final double cell_padding_x = 2;
private static final double body_btm_margin = 20;
private static final double body_cell_height = 20;
private static final Font title_font = new Font("黑体", Font.PLAIN, 18);
private static final Font time_font = new Font("Dialog", Font.PLAIN, 10);
private static final Font body_font = new Font("Dialog", Font.PLAIN, 10);
@Override
public int print(Graphics g, PageFormat pf, int pageIndex) throws
PrinterException {
//纸张宽
double pageWidth = pf.getImageableWidth();
//纸张高
double pageHeight = pf.getImageableHeight();
//打印的内容起始X
double pageStartX = pf.getImageableX();
//打印的内容起始Y
double pageStartY = pf.getImageableY();
//表头高
double tableHeadH = 0;
//Cell高
double cellH = 0;
//计算表头高度和单元格高度
g.setFont(body_font);
FontMetrics cellFm = g.getFontMetrics();
cellH = cellFm.getHeight() + cell_padding_y * 2 + 1;
tableHeadH = cellH * 2;
//计算Title以及其位置
String title = info;
g.setFont(title_font);
FontMetrics titleFm = g.getFontMetrics();
int titleW = titleFm.stringWidth(title);
//表底和表头文字属性
g.setFont(time_font);
FontMetrics btmFm = g.getFontMetrics();
FontMetrics timeFm = g.getFontMetrics();
//表格以上的Margin
double tableTopMargin = paper_offset_y + titleFm.getHeight() +
title_time_margin + timeFm.getHeight() + time_body_margin;
//表格每列的最大宽度
double[] cellColMaxWidths = caculateTableCellWidth(model, cellFm);
//当前Page的数据容量高度-不包括表头和表尾
double currentPageDataCapacityHeight = pageHeight - tableTopMargin -
tableHeadH - btmFm.getHeight() - body_btm_margin - 1;
//当前Page的数据容量
int currentPageBodyCapacityRows = (int) (currentPageDataCapacityHeight /
cellH);
//Y方向的分页数量
int pagesY = 0;
if (model.getRowCount() % currentPageBodyCapacityRows == 0) {
pagesY = (int) (model.getRowCount() /
currentPageBodyCapacityRows);
} else {
pagesY = (int) (model.getRowCount() /
currentPageBodyCapacityRows) +
1;
}
//当前页数大于总页数时不打印
if (pageIndex + 1 > pagesY) {
return NO_SUCH_PAGE;
}
//绘制Title
g.setFont(title_font);
g.drawString(title, (int) (pageStartX +
(pageWidth - titleW) / 2), (int) (pageStartY +
paper_offset_y +
titleFm.getAscent()));
//绘制区域移动到新的(0,0)点
g.translate((int) (paper_offset_x + pageStartX), (int) (tableTopMargin +
pageStartY));
int currentX = 0, currentY = 0;
//绘制第一张表
//绘制表头
g.setFont(time_font);
String time = "表头: " + info;
g.drawString(time, currentX, currentY);
currentY += 5;
//绘制单一表头
for (int i = 0; i < model.getColumnCount(); i++) {
double width = cellColMaxWidths[i];
double height = tableHeadH;
String name = model.getColumnName(i);
drawCell(g, name, currentX, currentY, (int) width,
(int) height, CENTER);
currentX += width;
}
//绘制数据
currentX = 0;
currentY = (int) tableHeadH;
//当前Page的数据容量
int rightCellX = 0;
int yIndex = pageIndex;
int startRow = currentPageBodyCapacityRows * yIndex;
int endRow = (currentPageBodyCapacityRows * (yIndex + 1)) >
totalRow
? totalRow
: (currentPageBodyCapacityRows * (yIndex + 1));
for (int row = startRow; row < endRow; row++) {
//绘制单项表头下面的数据
for (int i = 0; i < model.getColumnCount(); i++) {
double width = cellColMaxWidths[i];
double height = body_cell_height;
Object value = model.getValueAt(row, i);
drawCell(g, value, currentX, currentY, (int) width,
(int) height, AUTO);
currentX += width;
rightCellX = currentX;
}
currentX = 0;
currentY += cellH;
}
//绘制闭合线，下面和右侧两条
g.drawLine(currentX, currentY, rightCellX, currentY);
g.drawLine(rightCellX, 5, rightCellX, currentY);
drawBottomInfo(pageIndex, pagesY, currentY, g, (int) pageWidth);
return PAGE_EXISTS;
}
private void drawBottomInfo(int pageIndex, int pagesY,
int currentY, Graphics g, int pageWidth) {
if (pageIndex + 1 == pagesY) {
//绘制底部信息
int btmX = 0;
int btmY = currentY + 20;
g.drawString("负责人:", btmX, btmY);
g.drawString("制表:", pageWidth / 3, btmY);
FontMetrics fm = g.getFontMetrics();
int dataWidth = fm.stringWidth("日期: 2009/10/26");
g.drawString("日期:", pageWidth - dataWidth, btmY);
}
}
/**
* 计算最大列宽
* @param cellFm
* @return
*/
private double[] caculateTableCellWidth(
TableModel model,
FontMetrics cellFm) {
//表格每列的最大宽度
double[] cellColMaxWidths = new double[model.getColumnCount()];
//计算表头每列最大宽度
double[] headerColMaxWidths = new double[model.getColumnCount()];
for (int i = 0; i < model.getColumnCount(); i++) {
String name = model.getColumnName(i);
headerColMaxWidths[i] = cellFm.stringWidth(name) + cell_padding_x *
2 + 1;
}
//没有数据时，表头每列的最大宽度就是表格每列的最大宽度
cellColMaxWidths = headerColMaxWidths;
//算数据每列的最大宽度和表头每列最大宽度对比
for (int j = 0; j < model.getRowCount(); j++) {
for (int i = 0; i < model.getColumnCount(); i++) {
//做些数据类型的判断
Object value = model.getValueAt(j, i);
if (value instanceof BigDecimal) {
value = ((BigDecimal) value).doubleValue();
}
String text = "";
if (value != null) {
text = value.toString();
}
double temp = cellFm.stringWidth(text) + cell_padding_x * 2 + 1;
if (cellColMaxWidths[i] < temp) {
cellColMaxWidths[i] = temp;
}
}
}
return cellColMaxWidths;
}
/**
* 绘制单元格及里面的文字
* @param g
* @param value
* @param x
* @param y
* @param width
* @param height
*/
private static void drawCell(Graphics g, Object value, int x, int y,
int width,
int height, int locate) {
g.drawLine(x, y, x + width - 1, y);
g.drawLine(x, y, x, y + height - 1);
FontMetrics fm = g.getFontMetrics();
if (value == null) {
value = "";
}
switch (locate) {
case 0:
//居左
g.drawString(value.toString(), (int) (x + cell_padding_x), y +
(height - fm.getHeight()) / 2 + fm.getAscent());
case 1:
//居右
g.drawString(value.toString(),
(int) (x +
(width - fm.stringWidth(value.toString()) + width -
fm.stringWidth(value.toString()) - cell_padding_x) /
2), y +
(height - fm.getHeight()) / 2 + fm.getAscent());
case 2:
//居中
g.drawString(value.toString(), x + (width - fm.stringWidth(
value.toString())) / 2, y + (height -
fm.getHeight()) / 2 + fm.getAscent());
case 3:
//自动判断
NumberFormat formatter = NumberFormat.getNumberInstance();
formatter.setMinimumFractionDigits(2);
formatter.setMaximumFractionDigits(2);
//根据数据类型左对齐还是右对齐绘制还是居中对齐
if (value instanceof BigDecimal) {
//居右
value = ((BigDecimal) value).doubleValue();
value = formatter.format(value);
g.drawString(value.toString(),
(int) (x +
(width - fm.stringWidth(value.toString()) + width -
fm.stringWidth(value.toString()) - cell_padding_x) /
2), y +
(height - fm.getHeight()) / 2 + fm.getAscent());
} else if (value instanceof Integer || value instanceof Long ||
value instanceof Double) {
//居右
g.drawString(value.toString(),
(int) (x +
(width - fm.stringWidth(value.toString()) + width -
fm.stringWidth(value.toString()) - cell_padding_x) /
2), y +
(height - fm.getHeight()) / 2 + fm.getAscent());
} else {
//居中
g.drawString(value.toString(), x + (width - fm.stringWidth(
value.toString())) / 2, y + (height -
fm.getHeight()) / 2 + fm.getAscent());
}
}
}
public static void main(String[] args) {
new SwingCommonPrinitTools().printTable(testData(), "测试");
}
private static TableModel testData() {
final Object rows[][] = {
{"one", "ichi - \u4E00", "Test1", "Test2", "Test3"},
{"two", "ni - \u4E8C", "Test1", "Test2", "Test3"},
{"three", "san - \u4E09", "Test1", "Test2", "Test3"},
{"four", "shi - \u56DB", "Test1", "Test2", "Test3"},
{"five", "go - \u4E94", "Test1", "Test2", "Test3"},
{"six", "roku - \u516D", "Test1", "Test2", "Test3"},
{"seven", "shichi - \u4E03", "Test1", "Test2", "Test3"},
{"eight", "hachi - \u516B", "Test1", "Test2", "Test3"},
{"nine", "kyu - \u4E5D", "Test1", "Test2", "Test3"},
{"ten", "ju - \u5341", "Test1", "Test2", "Test3"},
{"one", "ichi - \u4E00", "Test1", "Test2", "Test3"},
{"two", "ni - \u4E8C", "Test1", "Test2", "Test3"},
{"three", "san - \u4E09", "Test1", "Test2", "Test3"},
{"four", "shi - \u56DB", "Test1", "Test2", "Test3"},
{"five", "go - \u4E94", "Test1", "Test2", "Test3"},
{"six", "roku - \u516D", "Test1", "Test2", "Test3"},
{"seven", "shichi - \u4E03", "Test1", "Test2", "Test3"},
{"eight", "hachi - \u516B", "Test1", "Test2", "Test3"},
{"nine", "kyu - \u4E5D", "Test1", "Test2", "Test3"},
{"ten", "ju - \u5341", "Test1", "Test2", "Test3"},
{"one", "ichi - \u4E00", "Test1", "Test2", "Test3"},
{"two", "ni - \u4E8C", "Test1", "Test2", "Test3"},
{"three", "san - \u4E09", "Test1", "Test2", "Test3"},
{"four", "shi - \u56DB", "Test1", "Test2", "Test3"},
{"five", "go - \u4E94", "Test1", "Test2", "Test3"},
{"six", "roku - \u516D", "Test1", "Test2", "Test3"},
{"seven", "shichi - \u4E03", "Test1", "Test2", "Test3"},
{"eight", "hachi - \u516B", "Test1", "Test2", "Test3"},
{"nine", "kyu - \u4E5D", "Test1", "Test2", "Test3"},
{"ten", "ju - \u5341", "Test1", "Test2", "Test3"},
{"one", "ichi - \u4E00", "Test1", "Test2", "Test3"},
{"two", "ni - \u4E8C", "Test1", "Test2", "Test3"},
{"three", "san - \u4E09", "Test1", "Test2", "Test3"},
{"four", "shi - \u56DB", "Test1", "Test2", "Test3"},
{"five", "go - \u4E94", "Test1", "Test2", "Test3"},
{"six", "roku - \u516D", "Test1", "Test2", "Test3"},
{"seven", "shichi - \u4E03", "Test1", "Test2", "Test3"},
{"eight", "hachi - \u516B", "Test1", "Tes12121t2", "Test3"},
{"nine", "kyu - \u4E5D", "Test1", "Test2", "Test3"},
{"ten", "ju - \u5341", "Test1", "Test2", "Test3"},
{"one", "ichi - \u4E00", "Test1", "Test2", "Test3"},
{"two", "ni - \u4E8C", "Test1", "Test2", "Test3"},
{"three", "san - \u4E09", "Test1", "Test2", "Test3"},
{"four", "shi - \u56DB", 12, "Test2", "Test3"},
{"five", "go - \u4E94", 121212, "Test2", "Test3"},
{"six", "roku - \u516D", 1212121212, "Test2", "Test3"},
{"seven", "shichi - \u4E03", 12.01, "Test2", "Test3"},
{"eight", "hachi - \u516B", 135.12, "Test2", "Test3"},
{"nine", "kyu - \u4E5D", 93828.34, "Test2", "Test3"},
{"ten", "ju - \u5341", "Test1", "Test2", "Test3"},
{"one", "ichi - \u4E00", "Test1", "Test2", "Test3"},
{"two", "ni - \u4E8C", "Test1", "Test2", "Test3"},
{"three", "san - \u4E09", "Test1", "Test2", "Test3"},
{"four", "shi - \u56DB", "Test1", "Test2", "Test3"},
{"five", "go - \u4E94", "Test1", "Test2", "Test3"},
{"six", "roku - \u516D", "Test1", "Test2", "Test3"},
{"seven", "shichi - \u4E03", "Test1", "Test2", "Test3"},
{"eight", "hachi - \u516B", "Test1", "Test2", "T1212121212est3"},
{"nine", "kyu - \u4E5D", "Test1", "Test2", "Test3"},
{"ten", "ju - \u5341", "Test1", "Test2", "Test3"},};
final Object headers[] = {"English", "Japanese", "Column1", "Column2",
"Column3"};
JTable table = new JTable(rows, headers);
return table.getModel();
}
}
3 Responses for "JTable Print"
往yingzhi dev上放一份吧~~
本来要放的，不知道yingzhi dev上用的什么编码高亮插件，就先发这里了。
[...] 打印这块，之前已经提过，可以参考之前的文章 JTable Print [...]
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