7. Swing, Jtable

18 Feb 2022 in Lang on Java 심화

1. Swing

JFC(Java Foundation Class Library) 라고 명시한다
Awt처럼 프레임을 생성하고 이벤트를 지정한다
Awt보다 컴포넌트의 기능이 많다
Awt
- 시스템 os의 자원을 그대로 이용
- 단일 Panel로 구성
Swing
- 컴포넌트를 자바로 구현
- 다중 패널로 구성
  - 컴포넌트가 적재되는 패널이 계층별로 여러 개 존재한다

package com.swing.day1;

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.border.BevelBorder;
import javax.swing.border.EtchedBorder;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;

public class SwingTest extends JFrame implements ActionListener {
	JButton bt1, bt2, bt3, bt4;
	
	
	public SwingTest() {
		super("Swing 예제");
		init();
		addEvent();
	}

	private void addEvent() {
		bt1.addActionListener(this);
		bt2.addActionListener(this);
		bt3.addActionListener(this);
		bt4.addActionListener(this);
		
	}

	private void init() {
		setSize(700,250);
		setLayout(new GridLayout(1,0));
		bt1=new JButton("버튼");
		
		ImageIcon icon1 = new ImageIcon("img/open.jpg"); //프로젝트폴더\img폴더\open.jpg
		ImageIcon icon2 = new ImageIcon("img/input.jpg");
		ImageIcon icon3 = new ImageIcon("img/confirm.jpg");
		
		bt2 = new JButton("OPEN",icon1);
		bt3 = new JButton("INPUT",icon2);
		bt4 = new JButton("CONFIRM",icon3);
		
		this.add(bt1);
		this.add(bt2);
		this.add(bt3);
		this.add(bt4);
		
		bt2.setVerticalTextPosition(JButton.BOTTOM);
		bt2.setHorizontalTextPosition(JButton.CENTER);
		
		bt3.setVerticalTextPosition(JButton.TOP);
		bt3.setHorizontalTextPosition(JButton.CENTER);
		bt3.setToolTipText("풍선 도움말");
		
		ImageIcon icon4 = new ImageIcon("img/exit.jpg");
		bt4.setPressedIcon(icon4); //누른상태시 아이콘
		bt4.setMnemonic('C'); // 단축키 alt+c
		
		//각 버튼에 보더 추가
		bt1.setBorder(new LineBorder(Color.green,5));
		bt2.setBorder(new TitledBorder("테두리에 제목 주기"));
		bt3.setBorder(new BevelBorder(BevelBorder.LOWERED));
		bt4.setBorder(new EtchedBorder());
		
		
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //창닫기 처리
		
		
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		if(e.getSource()==bt1) {
			//void showMessageDialog(Component parentComponent, Object message
			JOptionPane.showMessageDialog(this, "환영합니다");
		}
		else if(e.getSource()==bt2) {
			//void showMessageDialog(Component parentComponent, Object message, String title, int messageType)
			JOptionPane.showMessageDialog(this, "누르지마세요","경고",JOptionPane.WARNING_MESSAGE);
		}
		else if(e.getSource()==bt3) {
			//String showInputDialog(Component parentComponent, Object message)
			String name = JOptionPane.showInputDialog(this,"이름을 입력하세요");
			setTitle(name);
		}
		else if(e.getSource()==bt4) {
			//int showConfirmDialog(Component parentComponent, Object message, String title, int optionType)
			int quit = JOptionPane.showConfirmDialog(this, "종료하시겠습니까?","종료",JOptionPane.YES_NO_OPTION);
			setTitle("quit = "+quit);
			if(quit == JOptionPane.YES_OPTION) {
				System.exit(0);
			}
		}
		
	}
	
	public static void main(String[] args) {
		SwingTest f = new SwingTest();
		f.setVisible(true);

	}

}

2. Swing의 JTable

Jtable
- JTable(Object[][] rowData, Object[] columnNames)

package com.swing.day1;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;

public class TableTest extends JFrame {
	JScrollPane scrollPane;
	JTable table; //view
	String data[][] = {
			{"1","홍길동","서울"},
			{"2","김길동","경기"},
			{"3","이길동","인천"},
			{"4","박길동","대전"},
	}; //model
	
	String[] colNames = {"번호","이름","주소"};
	
	
	public TableTest() {
		super("Table Test");
		//JTable(Object[][] rowData, Object[] columnNames)
		table = new JTable(data, colNames);
		scrollPane = new JScrollPane(table);
		add(scrollPane);
		
		setSize(300,300);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	public static void main(String[] args) {
		TableTest f = new TableTest();
		f.setVisible(true);

	}

}

테이블은 사실 상 뷰
테이블에 직접 데이터를 넣지 않고 모델과 분리
DefaultTableModel model = new DefaultTableModel();

package com.swing.day1;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class TableTest2 extends JFrame{
	JScrollPane scrollPane;
	JTable table;
	DefaultTableModel model = new DefaultTableModel();
	String data[][] = {
			{"1","홍길동","서울"},
			{"2","김길동","경기"},
			{"3","이길동","인천"},
			{"4","박길동","대전"},
	};
	
	String[] colNames = {"번호","이름","주소"};
	
	public TableTest2() {
		table = new JTable();
		scrollPane = new JScrollPane(table);
		
		//setDataVector(Object[][] dataVector, Object[] columnIdentifiers)
		model.setDataVector(data, colNames);
		table.setModel(model);
		
		add(scrollPane);
		
		setSize(300,300);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}

	public static void main(String[] args) {
		TableTest2 f = new TableTest2();
		f.setVisible(true);

	}

}

JTable의 데이터베이스 연결

package com.swing.day1;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.SQLException;
import java.util.List;

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


public class TableTest3 extends JFrame {
	JTable table;
	JScrollPane scrollPane;
	JButton bt;
	DefaultTableModel model = new DefaultTableModel();
	
	
	public TableTest3(){
		super("table");
		
		bt = new JButton("조회");
		table = new JTable();
		scrollPane = new JScrollPane();
		
		model.addColumn("번호");
		model.addColumn("상품명");
		model.addColumn("가격");
		model.addColumn("등록일");
		
		table.setModel(model);
		table.getTableHeader().setBackground(Color.black);
		table.getTableHeader().setForeground(Color.yellow);
		table.getTableHeader().setReorderingAllowed(false);
		table.setRowHeight(20);
		
		scrollPane.setViewportView(table);
		this.add(scrollPane,"Center");
		this.add(bt,"North");
		
		setSize(400,500);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		bt.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				try {
					showData();
				} catch (SQLException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}

		});
		
	}
	private void showData() throws SQLException {
		PdDAO dao = new PdDAO();
		List<PdDTO> list = dao.selectAll();
		
		String[] colNames = {"번호","상품명","가격","등록일"};
		String[][] data = new String[list.size()][4];
		
		for(int i = 0; i<data.length; i++) {
			PdDTO dto = list.get(i);
			data[i][0] = dto.getNo()+"";
			data[i][1] = dto.getPdName()+"";
			data[i][2] = dto.getPrice()+"";
			data[i][3] = dto.getRegdate()+"";
		}
		
		model.setDataVector(data, colNames);
		table.setModel(model);
		
	}

	public static void main(String[] args) {
		TableTest3 f = new TableTest3();
		f.setVisible(true);

	}

}