JAVA课程设计作业—— Java与数据库连接操作（未完成）

1connection部分

package com.tjl.jdbc;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public class JDBCUtils {
	//全局
	private static String driver;
	private static String url;
	private static String username;
	private static String password;
	
	//静态语句块
	static {
		//JDBCUtils.class获得对象
		//getClassLoader()类加载器
		//getResourceAsStream("db.properties")加载资源文件到输入流
		InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("db.properties");
		
		//创建Property
		Properties p= new Properties();
		
		//加载流文件
		try {
			p.load(is);
			driver = p.getProperty("driver");
			url = p.getProperty("url");
			username = p.getProperty("username");
			password =p.getProperty("password");
			//加载MySQL驱动
			Class.forName(driver);
			System.out.println("驱动加载成功！");
		} catch (Exception e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
	}
	
//获得连接对象的方法
	public static Connection getConnection() {
		try {
			System.out.println("数据库连接成功");
			return DriverManager.getConnection(url, username, password);
			
		} catch (SQLException e) {
			// TODO 自动生成的 catch 块
			System.out.println("数据库连接失败");
			e.printStackTrace();
		}
		
		return null;
	}
	
	public static void close (Connection conn, Statement statement,ResultSet result){
		 
			try {
				if(result!=null) {
					result.close();
					result=null;
					
				}
				if(statement!=null) {
					statement.close();
					statement=null;
					
				}
				if(conn!=null) {
					conn.close();
					conn=null;
					
				}
				
			} catch (SQLException e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			}
		
	}
}

2登陆主页面

package com.tjl.view;
import javax.swing.*;

import com.tjl.bean.User;
import com.tjl.jdbc.JDBCUtils;

import java.awt.*;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.awt.event.ActionEvent;
public  class login2 extends JFrame{
	//标签
	private JLabel lable1;
	private JLabel lable2;
	//文本框
	private JTextField text1;
	private JTextField text2;
	//按钮
	private JButton bt1;
	private JButton bt2;  
	
	String sname;
	String spass;
	//构造函数
	public login2()
	{
		this.init();
		this.addComponent();
		this.addListener();
		System.out.println("8");
	}
	
	public void init()
	{
		this.setSize(500,400);
		this.setVisible(true);
		this.setTitle("登录界面");
		this.setLayout(null);
		this.setLocation(700, 300);
	}
	private void addComponent()
	{
		lable1 = new JLabel("用户名");
		lable1.setSize(100,70);
		lable1.setLocation(100,80);
		this.add(lable1);
		lable2 = new JLabel("密    码");
		lable2.setSize(100,70);
		lable2.setLocation(100,130);
		this.add(lable2);
		
		text1 = new JTextField();
		text1.setSize(150,30);
		text1.setLocation(160,100);
		this.add(text1);
		text2 = new JTextField();
		text2.setSize(150,30);
		text2.setLocation(160,150);
		this.add(text2);
	
		bt1 = new JButton("登录");
		bt1.setSize(70,30); 
		bt1.setLocation(140,195);
		this.add(bt1);
		bt2 = new JButton("退出");
		bt2.setSize(70,30);
		bt2.setLocation(250,195);
		this.add(bt2);
		this.setBackground(Color.blue);
		//设置单击关闭按钮时的默认操作
	    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	private void addListener()
	{
		System.out.println("0");
		bt1.addActionListener(new ActionListener()
		{
			//System.out.println("0");
			public void actionPerformed(ActionEvent e)
			{
				System.out.println("0");
				Connection conn = JDBCUtils.getConnection();
				
				PreparedStatement preparedstatement=null;
				System.out.println("0");
				ResultSet result =null;
				try {
					preparedstatement = conn
							.prepareStatement("select *from info2 where sname=? and spass=?");
					System.out.println("1");
					preparedstatement.setString(1, text1.getText());
					preparedstatement.setString(2, text2.getText());
					
					System.out.println("2");
					result = preparedstatement.executeQuery();
					System.out.println("3");
					if (result.next()) {
						try {
							System.out.println("4");
							sname=text1.getText();
							spass=text2.getText();
							//new login();
							dispose();
						} catch (Exception e1) {
							// TODO Auto-generated catch block
							System.out.println("5");
							e1.printStackTrace();
						}
						

					} else {
						JOptionPane pane = new JOptionPane("用户或密码错误");
	                     JDialog dialog  = pane.createDialog("警告");
	                     dialog.show();
					}

				} catch (SQLException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
//				if(text1.getText().equals("123")&&text2.getText().equals("123"))
//				{
//					new MainWindow();
//				    dispose();
//				}
//				else
//				{
//					JOptionPane.showMessageDialog(null, "登陆密码错误");
//				}
			}
		});
		
		bt2.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				System.out.println("6");
				dispose();
			}
		});

	}
	public User getUser() {
		System.out.println("7");
		return new User(sname,spass);
	}
	public static void main(String[] args) {
	 new login2();
	}
}

3.进入下一个界面...分支admin和player

待续...