java网站登录界面示例.docx

建立网站的注册界面，运行结果如图。程序运行时，将窗口的各项填充完整，若各项都填充正确，单击“注册”按钮，则弹出一个“消息”对话框，提示注册成功。否则给出相应提醒。若单击“清除”，则刚才所填写的内容将被清空。import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Login extends JApplet implements ActionListenerJLabel lb1,lb2,lb3,lb4,lb5,lb6,lb7,lb8;JComboBox jcb;JCheckBox cb;JTextArea ta;JButton bt1,bt2;JPasswordField pf1,pf2;JTextField tf1,tf2;JRadioButton rb=new JRadioButton2;JList list;JPanel pn1,pn2,pn3;JScrollPane sp1,sp2;ButtonGroup btg;public Login()lb1=new JLabel(用户名：);lb2=new JLabel(密码：);lb3=new JLabel(确认密码：);lb4=new JLabel(血型：);lb5=new JLabel(性别：);lb6=new JLabel(邮箱：);lb7=new JLabel(个人简历：);lb8=new JLabel(了解本网站的途径：);jcb=new JComboBox();jcb.addItem(A型);jcb.addItem(B型);jcb.addItem(AB型);jcb.addItem(O型);jcb.setSelectedIndex(0);cb=new JCheckBox(我愿意公开个人信息,true);ta=new JTextArea(5,15);bt1=new JButton(注册);bt2=new JButton(清除);bt1.addActionListener(this);bt2.addActionListener(this);pf1=new JPasswordField(15);pf2=new JPasswordField(15);tf1=new JTextField(15);tf2=new JTextField(15);sp1=new JScrollPane();sp1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);sp1.getViewport().add(ta);rb0=new JRadioButton(男);rb1=new JRadioButton(女);rb0.setSelected(true);btg=new ButtonGroup();btg.add(rb0);btg.add(rb1);String data=因特网,报纸杂志,朋友同事,其他方式;list=new JList(data);list.setSelectedIndex(0);sp2=new JScrollPane();sp2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);sp2.getViewport().add(list);pn1=new JPanel();pn1.add(lb5);pn1.add(rb0);pn1.add(rb1);GridBagLayout gb=new GridBagLayout();Container con=getContentPane();con.setLayout(gb);GridBagConstraints c=new GridBagConstraints();c.fill=GridBagConstraints.HORIZONTAL;c.anchor=GridBagConstraints.EAST;c.weightx=1.0;c.weighty=1.0;c.gridwidth=1;c.gridheight=1;gb.setConstraints(lb1,c);con.add(lb1);gb.setConstraints(tf1,c);con.add(tf1);c.gridwidth=1;gb.setConstraints(lb2,c);con.add(lb2);c.gridwidth=GridBagConstraints.REMAINDER;gb.setConstraints(pf1,c);con.add(pf1);c.gridwidth=1;gb.setConstraints(lb3,c);con.add(lb3);gb.setConstraints(pf2,c);con.add(pf2);c.gridwidth=1;gb.setConstraints(lb4,c);con.add(lb4);c.gridwidth=GridBagConstraints.REMAINDER;gb.setConstraints(jcb,c);con.add(jcb);c.gridwidth=1;gb.setConstraints(lb5,c);con.add(lb5);gb.setConstraints(pn1,c);con.add(pn1);c.gridwidth=1;gb.setConstraints(lb6,c);con.add(lb6);c.gridwidth=GridBagConstraints.REMAINDER;gb.setConstraints(tf2,c);con.add(tf2);c.gridwidth=1;c.gridheight=3;c.fill=GridBagConstraints.BOTH;gb.setConstraints(lb7,c);con.add(lb7);c.gridwidth=GridBagConstraints.REMAINDER;c.gridheight=3;gb.setConstraints(sp1,c);con.add(sp1);c.gridwidth=1;c.gridheight=3;gb.setConstraints(lb8,c);con.add(lb8);c.gridwidth=GridBagConstraints.REMAINDER;c.gridheight=3;gb.setConstraints(sp2,c);con.add(sp2);c.gridwidth=1;c.gridheight=2;c.fill=GridBagConstraints.HORIZONTAL;c.anchor=GridBagConstraints.CENTER;gb.setConstraints(cb,c);con.add(cb);c.gridwidth=1;gb.setConstraints(bt1,c);con.add(bt1);c.gridwidth=GridBagConstraints.REMAINDER;gb.setConstraints(bt2,c);con.add(bt2);public void actionPerformed(ActionEvent e)if(e.getSource()=bt1)if(tf1.getText().equals()/isEmpty()不能用JOptionPane.showMessageDialog(this, 用户名不能为空！);else if(pf1.getPassword().length0)if(String.valueOf(pf1.getPassword().equals(String.valueOf(pf2.getPassword()JOptionPane.showMessageDialog(this, 注册成功！);elseJOptionPane.showMessageDialog(this, 两次输入密码不同，请重新输入！);pf1.setText();pf2.setText();if(