开发者使用JasperReport——不同数据源之表格数据源

前言
    前面的几篇我们讲解的都是一些普通简单格式的报表，但是有时我们的报表会要求是表格形式的，这时我们就需要用到我们的JRTableModelDataSource。
 
正题
跟之前的一样，我们要生成报表需要以下几个步骤：
1.引入jar包，请看《静态文本报表》
。

2.新建报表模版：
跟我们前一篇的AircraftReport报表模版是一样的，请参见《不同数据源之Map数据源》；
 
3.编译报表模版，请看《静态文本报表》。

4.编写servlet:
package com.dan.jasper;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.data.JRTableModelDataSource;
import net.sf.jasperreports.view.JasperViewer;

public class TableModelReport {

JFrame mainFrame;
BorderLayout borderLayout;
DefaultTableModel tableModel;
JTable table = new JTable();
JButton generateReportButton = new JButton("Generate Report");

public TableModelReport(){
mainFrame = new JFrame("Aircraft Data");
borderLayout = new BorderLayout();
generateReportButton.addActionListener(new ReportGenerator());
populateTableModel();
mainFrame.setSize(640, 150);
mainFrame.setVisible(true);
mainFrame.getContentPane().setLayout(borderLayout);
mainFrame.add(new JLabel("Aircraft Data"),BorderLayout.NORTH);
table.setModel(tableModel);
mainFrame.getContentPane().add(table,BorderLayout.CENTER);
mainFrame.getContentPane().add(generateReportButton, BorderLayout.SOUTH);
mainFrame.setVisible(true);

}

private void populateTableModel(){
String[] columnNames = {"ID","NAME","SEX"};
String[][] data = {
{"1","Rebecca1","female"},
{"2","Rebecca2","female"},
{"3","Rebecca3","female"},
{"4","Rebecca4","female"}
};
tableModel = new DefaultTableModel(data, columnNames);
}

private void displayReport(){
JasperPrint jasperPrint = generateReport();
JasperViewer jasperViewer = new JasperViewer(jasperPrint);
jasperViewer.setVisible(true);
}

private JasperPrint generateReport(){
JasperPrint jasperPrint = null;
try{
jasperPrint = JasperFillManager.fillReport("E:/Project/Work1/Report3/WebRoot/WEB-INF/classes/reports/AircraftReport.jasper", new HashMap(),new JRTableModelDataSource(tableModel));
}catch(JRException e){
e.printStackTrace();
}
return jasperPrint;
}

private class ReportGenerator implements ActionListener{
public void actionPerformed(ActionEvent e){
displayReport();
}
}

public static void main(String[] args){
new TableModelReport();
}

}

5.配置web.xml，就是配置servlet
 
6.运行项目
看一下我的运行结果：
    




小结：
   这个表格形式的报表跟我们最前面的预览报表很像，只不过它展现了表格的样式而且还要预览打印报表的功能。