Javaswing登录页面的实现

package com.shou.loginfjame; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Container; import java.awt.Cursor; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import java.awt.Image; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.SQLException; import java.util.List; import javax.swing.BorderFactory; import javax.swing.Box; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.xml.bind.util.ValidationEventCollector; import com.shou.LoginUtil.LoginUser; import com.shou.dao.LoginDao; import com.shuo.util.ValidCode; public class LoginFjame extends JFrame implements ActionListener { private JFrame frame = new JFrame("登录"); private JPanel panel = new JPanel(); private JLabel tiel = new JLabel("龍丶逸小说登录系统"); // 创建标题 private JLabel userLabel = new JLabel("用户名:"); // 创建UserJLabel private JTextArea userText=new JTextArea("请输入内容",7, 30); // 获取登录名 private JLabel passLabel = new JLabel("密 码:"); // 创建PassJLabel private JPasswordField passText = new JPasswordField(20); // 密码框隐藏 private JLabel verCodeLa = new JLabel("验证码:"); // 验证码 private JTextField inputCode = new JTextField(); // 验证码框 private ValidCode vcode = new ValidCode(); // 验证码内容 JTextField jt_code; private JButton loginButton = new JButton("登录"); // 创建登录按钮 private JButton registerButton = new JButton("注 册"); // 创建注册按钮 private JButton newPasswordButton = new JButton("忘记密码"); // 创建注册按钮 private JButton exitButton = new JButton("退出"); JTextField field = null; public LoginFjame() { System.out.println("====================================="); System.out.println("== 龍丶逸小说系统 =="); System.out.println("== V1.1.1.0 =="); System.out.println("====================================="); WinLogin(); } public void WinLogin() { panel.setLayout(null); // 设置布局为 null // 创建标题名称 this.tiel.setFont(new Font("宋体", 1, 20)); this.tiel.setBounds(150, 30, 300, 25); this.panel.add(this.tiel); // 创建 UserJLabel this.userLabel.setFont(new Font("宋体", 1, 13)); this.userLabel.setBounds(70, 80, 80, 25); this.panel.add(userLabel); // 创建文本域用于用户输入 this.userText.setBounds(145, 80, 165, 25); this.panel.add(this.userText); // 注册 this.registerButton.setFont(new Font("宋体", 1, 15)); this.registerButton.setContentAreaFilled(false); this.registerButton.setBorderPainted(false); /* registerButton.setBackground(Color.red); */ this.registerButton.setBounds(320, 80, 100, 25); this.panel.add(this.registerButton); // 变成小手 this.registerButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 创建PassJLabel this.passLabel.setFont(new Font("宋体", 1, 13)); this.passLabel.setBounds(70, 110, 80, 25); this.panel.add(this.passLabel); // 密码输入框 隐藏 this.passText.setBounds(145, 110, 165, 25); this.panel.add(this.passText); // 忘记密码 this.newPasswordButton.setFont(new Font("宋体", 1, 15)); this.newPasswordButton.setContentAreaFilled(false); this.newPasswordButton.setBorderPainted(false); /* registerButton.setBackground(Color.red); */ this.newPasswordButton.setBounds(320, 110, 100, 25); this.panel.add(this.newPasswordButton); // 变成小手 this.newPasswordButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 验证码code this.verCodeLa.setFont(new Font("宋体", 1, 13)); this.verCodeLa.setBounds(70, 140, 80, 25); this.panel.add(this.verCodeLa); // 验证码框 this.inputCode.setBounds(145, 140, 165, 25); this.panel.add(this.inputCode); // 验证码图片 this.vcode.setBounds(320, 140, 165, 25); this.panel.add(this.vcode); System.out.println(this.vcode); // 创建登录按钮 this.loginButton.setFont(new Font("宋体", 1, 15)); this.loginButton.setBounds(95, 190, 80, 25); this.panel.add(this.loginButton); // 变成小手 this.loginButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 退出按钮 this.exitButton.setFont(new Font("宋体", 1, 15)); this.exitButton.setBounds(230, 190, 80, 25); this.panel.add(this.exitButton); // 变成小手 this.exitButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // 设置窗体的位置及大小 this.frame.setSize(460, 355); frame.setLocationRelativeTo(null); // 在屏幕中居中显示 frame.add(this.panel); // 添加面板 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置X号后关闭 //设置按钮 this.registerButton.addActionListener(this); //注册按钮 this.newPasswordButton.addActionListener(this); //忘记密码 this.loginButton.addActionListener(this); //登录 this.exitButton.addActionListener(this); //退出 // 往窗体里放其他控件 frame.setVisible(true); // 设置窗体可见 } @Override public void actionPerformed(ActionEvent e) { JButton bt = (JButton) e.getSource(); // 获取按钮信息 String str = bt.getText(); // 获取用户名 String name = this.userText.getText().trim(); // 获取密码 String password = this.passText.getText().trim(); // 获取验证码 String code = this.inputCode.getText().trim(); // 获取jsp验证码 String vcode = this.vcode.getCode(); // 登录 if (str.equals("登录")) { System.out.println("登录"); // 验证码转为大写 String Dcode = code.toUpperCase(); String Dvcode = vcode.toUpperCase(); // 验证码判断 if (Dcode.equals(Dvcode)) { //获取页面的用户名 String username=this.userText.getText().trim(); // 根据用户名查看是否有该用户 try { List<LoginUser> loginUser=new LoginDao().queryAll(username); String a=loginUser.toString(); System.out.println(a.toString()); if(!a.toString().equals("[]")){ //密码判断 String mysqlPasword=loginUser.get(0).l_password(); if(mysqlPasword.equals(password)){ //登录成功 JOptionPane pane = new JOptionPane("登录成功"); JDialog dialog = pane.createDialog(this, "警告"); dialog.show(); }else{ JOptionPane pane = new JOptionPane("密码错误错误，请重新输入"); JDialog dialog = pane.createDialog(this, "警告"); dialog.show(); } }else{ JOptionPane pane = new JOptionPane("用户名错误，请重新输入"); JDialog dialog = pane.createDialog(this, "警告"); dialog.show(); } /*System.out.println(loginUser.toString()); String sqlUername=loginUser.get(0).getL_username();*/ /*int sqlpassword=loginUser.get(0).getL_power();*/ /*System.out.println("loginF:"+sqlUername);*/ } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } else { JOptionPane pane = new JOptionPane("验证码错误，请重新输入"); JDialog dialog = pane.createDialog(this, "警告"); System.out.println(dialog.getFont()); dialog.show(); } } else // 退出 if (str.equals("退出")) { System.out.println("退出"); System.exit(0); } else // 注册 if (str.equals("注 册")) { System.out.println("注 册"); } // 注册 else if (str.equals("忘记密码")) { System.out.println("忘记密码"); } else { System.out.println("异常错误"); } } public boolean isValidCodeRight() { System.out.println(this.jt_code.getText()); if (this.jt_code == null) { return false; } if (this.vcode == null) { return true; } if (this.vcode.getCode().equals(this.jt_code.getText())) { return true; } return false; } public static void main(String[] args) { new LoginFjame(); } }

a.jar登录页面，加载有错误

//获取产生事件的事件源强制转换 JButton bt = (JButton)e.getSource(); //获取按钮上显示的文本 String str = bt.getText(); //获取用户名 String name = userTxt.getText().trim(); //获取密码 String password = pwdTxt.getText().trim(); //获取界面验证码 String code=verCodeTxt.getText().trim(); //点击验证码 String vCode =vcode.getCode(); //判断是确定，还是退出 System.out.println(str);