java图像开发学习——JTable之导入数据库

Posted 2020-10-18 暮雪超霸

package demo;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;

public class DeMO {
	
	public DeMO(){
		JFrame frame=new JFrame("暮雪超霸");
		Container contentPane = frame.getContentPane();
		JPanel panel=new JPanel();
		JPanel panel1=new JPanel();
		JPanel panel2=new JPanel();
		JLabel jLabel=new JLabel("超霸");
		JButton button=new JButton("开始");
		JButton button2=new JButton("暂停");
		JButton button3=new JButton("下一首");
		contentPane.setLayout(new BorderLayout());
		panel.add(jLabel);
		panel.add(button);
		panel.add(button2);
		panel.add(button3);
		contentPane.add(panel,BorderLayout.NORTH);
		
	
		JButton button4=new JButton("退出");
		Conn con=new Conn();
		ResultSet select = con.getSelect("select *from chaoba");
		Vector col = getCol(select);
		Vector data = getData(select);
		JTable jTable=new JTable(data,col);
		JScrollPane jScrollPane=new JScrollPane();
		jScrollPane.getViewport().add(jTable);
		panel1.add(button4);
		panel2.add(jScrollPane);
		contentPane.add(panel1,BorderLayout.SOUTH);
		contentPane.add(panel2,BorderLayout.CENTER);
		frame.setSize(600, 400);
		frame.setVisible(true);
		
		
		button.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg0) {
			System.out.println("开始");
			}
		});
		
		
		button2.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg0) {
			System.out.println("暂停");
			}
		});
		
		
	}
	
	
public static void main(String[] args) {
    new DeMO();
}



public Vector getCol(ResultSet rs){
	Vector col=new Vector();
	try {
		ResultSetMetaData metaData = rs.getMetaData();
		int columnCount = metaData.getColumnCount();
		for (int i = 1; i <= columnCount; i++) {
			col.add(metaData.getColumnName(i));
			
		}
		
		
	} catch (Exception e) {
		// TODO 自动生成的 catch 块
		e.printStackTrace();
	}
	
	return col;
	
}
public Vector getData(ResultSet rs){
	Vector data=new Vector();
	try {
		ResultSetMetaData metaData = rs.getMetaData();
		int columnCount = metaData.getColumnCount();
		while (rs.next()) {
			Vector v=new Vector();
			for(int i=1;i<=columnCount;i++)
			{
			v.addElement(rs.getString(i));
			}
			data.addElement(v);
		}
	} catch (SQLException e) {
		// TODO 自动生成的 catch 块
		e.printStackTrace();
	}
	
	return data;
	
	
	
}
}

　　

package demo;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;

public class Conn {
	
	Connection con;
	public  Conn(){
		try {
			Class.forName("com.mysql.jdbc.Driver");
			String url="jdbc:mysql://localhost:3306/chaoba?user=root&password=root&useUnicode=true&characterEncoding=UTF8";
			 con=DriverManager.getConnection(url);
			
			
			
			
		} catch (Exception e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
		

		
		
	}
	
	
	public ResultSet getSelect(String sql){
		Vector col=new Vector();
		Vector data=new Vector();
		ResultSet rs=null;
			Statement statement;
			try {
				statement = con.createStatement();
				 rs = statement.executeQuery(sql);
			} catch (SQLException e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			}
			
			
		
		
		return rs;
		
		
		
		
	}

}