java连接sql server--关于登录验证及对数据库增删改查应用

一：步骤##

1.sql server建立数据库和相关表

2.建立数据源

 (1).打开控制面板找到管理，打开ODBC选项或直接搜索数据源

 (2).打开数据源配置后点击添加，选择sql server点击完成

 (3).给数据源命名，服务器选择本机电脑sql server 服务器名下一步





后面全部点下一步或确定就可以了。

3.代码设计

  1.加载数据库驱动

   2.与数据源建立连接

  3.与数据库建立会话

  4.操作数据库

经常使用的一些JDBC URL###

JDBC-ODBC:jdbc:odbc:####

Oracle:jdbc:oracle:thin:@####

DB2:jdbc:db2:MyTest or jdbc.db2://localhost:6789/MyTest(需要用户名和密码)####

sql server数据库连接###

package mybook;
import java.sql.*;

import javax.swing.JOptionPane;
public class bookdb {
	String drivername="sun.jdbc.odbc.JdbcOdbcDriver";//驱动名
	Connection conn;
	Statement stmt;
	ResultSet rs;
	bookdb(){
		try {
			Class.forName(drivername);
			conn=DriverManager.getConnection("jdbc:odbc:bookdb","sa","zhangyabiao");//与数据源bookdb建立连接
			stmt=conn.createStatement();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	public ResultSet find(String sql){//对数据库进行数据查询
		try {
			rs=stmt.executeQuery(sql);
			return rs;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}

	}
	public boolean update(String sql){//对增删改
		try {
			stmt.executeUpdate(sql);
			//JOptionPane.showInternalMessageDialog(null, "执行成功");
			return true;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			//JOptionPane.showInternalMessageDialog(null, "执行失败");
			return false;
		}
	}
}

数据库登录验证及账户注册###

package mybook;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
public class denglu extends JFrame implements ActionListener{
	JPanel p1,p2,p3;
	JLabel l1,l2;
	JTextField f1;
	JPasswordField f2;
	JButton b1,b2;
	ResultSet rs;
	bookframe bf;
	bookdb b;
	zuce z;
	denglu(){
		b=new bookdb();
		this.setLayout(new GridLayout(3,1));
		p1=new JPanel();
		p2=new JPanel();
		p3=new JPanel();
		l1=new JLabel("账户：");
		l2=new JLabel("密码：");
		f1=new JTextField(15);
		f2=new JPasswordField(15);
		b1=new JButton("登录");
		b2=new JButton("注册");
		p1.add(l1);
		p1.add(f1);
		p2.add(l2);
		p2.add(f2);
		p3.add(b1);
		p3.add(b2);
		this.add(p1);
		this.add(p2);
		this.add(p3);
		b1.addActionListener(this);
		b2.addActionListener(this);
		this.setBounds(300, 350, 300, 250);
		this.setVisible(true);
	}
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==b1){//账户验证
			String sql="select *from yonghu where password='"+f2.getText()+"'";
			rs=b.find(sql);
			try {
				if(rs.next()){
					bf=new bookframe();
					this.dispose();//释放窗体
				}else{
					JOptionPane.showMessageDialog(null, "账户或密码错误，请重新登录");
					f1.setText("");
					f2.setText("");
				}
			} catch (SQLException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}else if(e.getSource()==b2){
			z=new zuce();//注册账户
		}
	}
}

账户注册

package mybook;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class zuce extends JFrame implements ActionListener{
	JPanel p1,p2,p3;
	JLabel l1,l2;
	JTextField f1;
	JPasswordField f2;
	JButton b1,b2;
	ResultSet rs;
	bookdb b;
	zuce(){
		b=new bookdb();
		this.setLayout(new GridLayout(3,1));
		p1=new JPanel();
		p2=new JPanel();
		p3=new JPanel();
		l1=new JLabel("账户：");
		l2=new JLabel("密码：");
		f1=new JTextField(15);
		f2=new JPasswordField(15);
		b1=new JButton("保存");
		b2=new JButton("取消");
		p1.add(l1);
		p1.add(f1);
		p2.add(l2);
		p2.add(f2);
		p3.add(b1);
		p3.add(b2);
		this.add(p1);
		this.add(p2);
		this.add(p3);
		b1.addActionListener(this);
		b2.addActionListener(this);
		this.setBounds(400, 400, 300,250 );
		this.setVisible(true);

	}
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==b1){
			String sql="insert into yonghu values('"+f1.getText()+"','"+f2.getText()+"')";
			if(b.update(sql)){
				JOptionPane.showMessageDialog(null, "注册成功");
				this.dispose();
			}else{
				JOptionPane.showMessageDialog(null, "用户已存在");
				f1.setText("");
				f2.setText("");
			}
		}else{
			this.dispose();
		}
	}
}

对数据库进行对图书的增删改查###

package mybook;
import java.sql.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class bookframe extends JFrame implements ActionListener {
	JLabel l1,l2,l3;
	JTextField f1,f2,f3;
	JButton b1,b2,b3,b4;
	JPanel p1,p2,p3,p4,p5;
	ResultSet rs;
	bookdb b;
	bookframe(){
		b=new bookdb();
		this.setLayout(new GridLayout(5,1));
		l1=new JLabel("书本编号：");
		l2=new JLabel("书       名：");
		l3=new JLabel("书本作者：");
		f1=new JTextField(15);
		f2=new JTextField(15);
		f3=new JTextField(15);
		b1=new JButton("增加");
		b2=new JButton("查询");
		b3=new JButton("修改");
		b4=new JButton("删除");
		p1=new JPanel();
		p2=new JPanel();
		p3=new JPanel();
		p4=new JPanel();
		p5=new JPanel();
		p1.add(l1);
		p1.add(f1);
		p2.add(l2);
		p2.add(f2);
		p3.add(l3);
		p3.add(f3);
		p4.add(b1);
		p4.add(b2);
		p5.add(b3);
		p5.add(b4);
		this.add(p1);
		this.add(p2);
		this.add(p3);
		this.add(p4);
		this.add(p5);
		b1.addActionListener(this);
		b2.addActionListener(this);
		b3.addActionListener(this);
		b4.addActionListener(this);
		b3.setEnabled(false);
		b4.setEnabled(false);
		this.setSize(350, 450);
		this.setVisible(true);
	}
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==b1){//增加图书
			String sql="insert into book values('"+f1.getText()+"','"+f2.getText()+"','"+f3.getText()+"')";
			if(b.update(sql)){
				f2.setText("");
				f3.setText("");
				JOptionPane.showMessageDialog(null, "图书增加成功");
			}else{
				JOptionPane.showMessageDialog(null, "图书编号已存在");
				f1.setText("");
				f2.setText("");
				f3.setText("");
			}
		}else if(e.getSource()==b2){//查找图书
			String sql="select *from book where bookid='"+f1.getText()+"'";
			rs=b.find(sql);
			try {
				while(rs.next()){
					f2.setText(rs.getString(2));
					f3.setText(rs.getString(3));
					b3.setEnabled(true);
					b4.setEnabled(true);
				}
			} catch (SQLException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
				JOptionPane.showMessageDialog(null, "您查找的编号不存在，请重新查找");
				f1.setText("");
				f2.setText("");
				f3.setText("");
			}
		}else if(e.getSource()==b3){//修改图书资料
			String sql="update book set bookname='"+f2.getText()+"',bookauthor='"+f3.getText()+"'where bookid='"+f1.getText()+"'";
			if(b.update(sql)){
				JOptionPane.showMessageDialog(null, "修改成功");
				f2.setText("");
				f3.setText("");
				b3.setEnabled(false);
				b4.setEnabled(false);
			}else{
				JOptionPane.showMessageDialog(null, "修改失败，可能您修改的图书编号不存在");
			}
		}else if(e.getSource()==b4){//删除图书
			String sql="delete from book where bookid='"+f1.getText()+"'";
			if(b.update(sql)){
				JOptionPane.showMessageDialog(null, "图书成功删除");
				f1.setText("");
				f2.setText("");
				f3.setText("");
				b3.setEnabled(false);
				b4.setEnabled(false);
			}else{
				JOptionPane.showMessageDialog(null, "没能查找到您要删除的图书编号");
			}
		}
	}
}

主函数###

package mybook;
public class frame_main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		denglu d=new denglu();
	}

}