Swing+数据库连接

 数据库类型：SQL Server2000

切记，不要忘了加驱动包！

DB.java

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DB {

    private static final String URL = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=UserInfo";
                                //数据库路径：服务器所在的计算机为localhost:1433;
                                //数据库名称：UserInfo
    private static final String UserName = "xsy";    //用户名称
    private static final String PassWord = "xsy123";  //用户密码
    private static Connection conn = null;

    public static Connection getConnection(){
        try {
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");  //加载驱动程序
            conn = DriverManager.getConnection(URL, UserName, PassWord);    //创建数据库连接
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return conn;
    }
}

test1.java

import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;

public class test1 extends JFrame implements ActionListener{

    public static void main(String[] args) {
        test1 t1 = new test1();
        t1.setVisible(true);       //设置窗体可见

    }

    JButton button1;
    JButton button2;
    JTextField textField1;
    JTextField textField2;
    JTextField textField3;
    public test1(){
        super();
        this.setTitle("查询基本信息");
        this.setBounds(200,200,350,260);   //setSize(int width,int hight);setBounds(x,y,width,hight);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container p = getContentPane();
        p.setLayout(null);

        JLabel label1 = new JLabel("姓名：");
        label1.setBounds(80,10,40,20);
        p.add(label1);

        textField1 = new JTextField();
        textField1.setBounds(130,8,120,20);
        p.add(textField1);

        button1 = new JButton("查询");
        button1.setBounds(100,40,60,20);
        button1.addActionListener(this);  //添加鼠标响应事件
        p.add(button1);

        button2 = new JButton("重置");
        button2.setBounds(180,40,60,20);
        button2.addActionListener(this);
        p.add(button2);

        JPanel resultPanel = new JPanel();
        resultPanel.setBounds(40,90,260,100);

        //定义指定颜色，指定标题的边框
        TitledBorder tb = new TitledBorder(BorderFactory.createLineBorder(new Color(255,0,0)),"查询结果");
        tb.setTitleColor(Color.blue);//设置标题颜色

        resultPanel.setBorder(tb);    //将标题边框添加到面板中
        //resultPanel.setBackground(Color.yellow);
        resultPanel.setLayout(null);
        JLabel label2 = new JLabel("姓名：");
        label2.setBounds(80,110,40,20);
        p.add(label2);
        textField2 = new JTextField();
        textField2.setBounds(130,108,120,20);
        p.add(textField2);
        JLabel label3 = new JLabel("密码");
        label3.setBounds(80,140,40,20);
        p.add(label3);
        textField3 = new JTextField();
        textField3.setBounds(130,140,120,20);
        p.add(textField3);

        p.add(resultPanel);
    }

    public void actionPerformed(ActionEvent e){
        JButton jb = (JButton)e.getSource();
        if(jb == button1){
            String name = textField1.getText();
            String password = search(name);
            textField2.setText(name);
            textField3.setText(password);
        }
        if(jb == button2){
            textField1.setText("");
        }

    }
    public String search(String name){
        String password="";
        try {
            Connection conn = DB.getConnection();
            Statement stmt = conn.createStatement();
            String sql = "select UserPwd from User_info where UserName='"+name+"'";
            ResultSet rs = stmt.executeQuery(sql);
            while(rs.next()){
                password = rs.getString(1);
            }
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return password;
    }
}