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。