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发表于 2019-11-28 10:44:04
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显示全部楼层
把bh类中的
JFrame dd2 = new JFrame("注册界面");
Container x = dd2.getContentPane();
JLabel yh = new JLabel("用户注册");
JLabel zy = new JLabel("用户名");
JLabel zm = new JLabel("密码");
JLabel zm2 = new JLabel("确认密码");
JButton log=new JButton("注册");
JButton can=new JButton("取消");
JTextField y1 = new JTextField();
JPasswordField y2 = new JPasswordField();
JPasswordField y3 = new JPasswordField();
搬到bh中作为成员变量- import java.awt.Container;
- import java.awt.event.*;
- import java.sql.*;
- import javax.swing.*;
- class Login extends JFrame{
- JLabel jj = new JLabel("登录界面");
- JLabel j1 = new JLabel("账号");
- JLabel j2 = new JLabel("密码");
- JTextField tt = new JTextField();
- JPasswordField pass = new JPasswordField();
- JButton b1 = new JButton("登录");
- JButton b2 = new JButton("取消");
- JLabel zc = new JLabel("用户不存在,请注册");
- JButton b3 = new JButton("注册");
- Container c = this.getContentPane();
- static String str;
-
- public Login() {
- super("用户登录界面");
- this.setBounds(200,200,500,500);
- this.setLayout(null);
- jj.setBounds(220,0,100,70);
- j1.setBounds(100,75,70,60);
- j2.setBounds(100,115,70,60);
- tt.setBounds(140,80,120,35);
- pass.setBounds(140,120,120,35);
- b1.setBounds(140,160,60,40);
- b2.setBounds(210,160,60,40);
- zc.setBounds(50,350,150,70);
- b3.setBounds(210,360,60,40);
- c.add(jj);
- c.add(j1);
- c.add(j2);
- c.add(tt);
- c.add(pass);
- c.add(b1);
- c.add(b2);
- c.add(zc);
- c.add(b3);
- bh a = new bh();
- b1.addActionListener(a);
- b2.addActionListener(a);
- b3.addActionListener(a);
- this.setVisible(true);
- }
-
- class bh implements ActionListener{
- JFrame dd2 = new JFrame("注册界面");
- Container x = dd2.getContentPane();
- JLabel yh = new JLabel("用户注册");
- JLabel zy = new JLabel("用户名");
- JLabel zm = new JLabel("密码");
- JLabel zm2 = new JLabel("确认密码");
- JButton log=new JButton("注册");
- JButton can=new JButton("取消");
- JTextField y1 = new JTextField();
- JPasswordField y2 = new JPasswordField();
- JPasswordField y3 = new JPasswordField();
- public void actionPerformed(ActionEvent e) {
- JButton bt = (JButton)e.getSource();
- String username = tt.getText().trim();
- String Pass = String.valueOf(pass.getPassword());
-
-
-
- if(bt==b1) {
- /*if(tt.getText().equals("888")&&Pass.equalsIgnoreCase("222333"))
- JOptionPane.showMessageDialog(null, "登陆成功");
- else
- JOptionPane.showMessageDialog(null, "登陆失败");
- }*/
- try{
- Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
- String url = "jdbc:sqlserver://localhost:1433;databasename=student";
- String user = "sa";
- String password = "123456";
- Connection con = DriverManager.getConnection(url, user, password);
- Statement stmt=con.createStatement();
- String sel = "select * from student where name='"+username+"' and pass='"+Pass+"'";
- ResultSet rset=stmt.executeQuery(sel);
- if(rset.next())
- JOptionPane.showMessageDialog(null, "登陆成功");
- else
- JOptionPane.showMessageDialog(null, "登陆失败");
-
- con.close();
- }catch(Exception e1){
- e1.printStackTrace();}}
- if(bt==b2) {
- tt.setText("");
- pass.setText("");
- }
- if(bt==b3) {
-
- dd2.setBounds(200,200,500,500);
-
- x.setLayout(null);
-
- yh.setBounds(130,0,60,50);
-
- zy.setBounds(100,60,60,50);
-
- zm.setBounds(100,110,60,50);
-
- zm2.setBounds(100,160,120,50);
-
- log.setBounds(120,230,60,40);
-
- can.setBounds(200,230,60,40);
-
- y1.setBounds(160,65,120,35);
-
- y2.setBounds(160,115,120,35);
-
- y3.setBounds(160,165,120,35);
-
- x.add(yh);
- x.add(zy);
- x.add(zm);
- x.add(zm2);
- x.add(y1);
- x.add(y2);
- x.add(y3);
- x.add(log);
- x.add(can);
- dd2.setVisible(true);
-
- log.addActionListener(new ActionListener(){
- public void actionPerformed(ActionEvent e2){
- String setuser = zy.getText();
- String setpass = String.valueOf(y2.getPassword());
- String setpass2 = String.valueOf(y3.getPassword());
- try{
- Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
- String url = "jdbc:sqlserver://localhost:1433;databasename=student";
- String user = "sa";
- String password = "123456";
- Connection con = DriverManager.getConnection(url, user, password);
- Statement stmt=con.createStatement();
- String sel = "select * from student where name="+"'"+setuser+"'";
- ResultSet rset=stmt.executeQuery(sel);
- //rset.next();
- //System.out.println(rset.getString(1));
- //rset.beforeFirst();
-
- //if(rset.next())
- // str = rset.getString();
- //System.out.println(str);
- if(rset.next())
- JOptionPane.showMessageDialog(null, "用户已存在");
- else
- JOptionPane.showMessageDialog(null, "。。。");
- con.close();
- }catch(Exception e3){
- e3.printStackTrace();}
- }
- });
- }
- }
- }
- }
- public class Test {
- public static void main(String[] args) {
- // TODO Auto-generated method stub
- new Login();
- }
- }
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