ＪＤＢＣ连接数据库，完成注册和登录

第一：建立ｕｓｅｒ表



第二：完成登录和注册界面

 

其中注册界面代码

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;

import javax.swing.JButton;

import javax.swing.JDialog;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JRadioButton;

import javax.swing.JTextField;

 

public class ResigerUI extends JDialog implements ActionListener {

 

 private UserService service = new UserServiceImpl();

 private int width = 600;

 private int height = 500;

 private JLabel titlelb;

 

 /** 用户名标签 */

 private JLabel nameLb;

 /** 密码标签 */

 private JLabel passwordLb;

 /** 性别标签 */

 private JLabel sexLb;

 /** 邮箱标签 */

 private JLabel emailLb;

 /** 联系电话标签 */

 private JLabel phoneLb;

 

 /** 用户名文本框 */

 private JTextField nameTf;

 /** 密码文本框 */

 private JPasswordField passwordTf;

 /** 女性单选按钮 */

 private JRadioButton maleRbtn;

 /** 男性单选按钮 */

 private JRadioButton femaleRbtn;

 /** 联系电话文本框 */

 private JTextField phoneTf;

 /** 邮箱文本框 */

 private JTextField emailTf;

 /**确定按钮*/

 private JButton okBtn;

 /**重置*/

 private JButton resetBtn;

 /** 构造方法 */

 public ResigerUI() {

  initComponents();

  layoutComponents();

  addListeners();

  

  setSize(516, 483);// 设置大小

  setModal(true);//设置为模态窗口

  setDefaultCloseOperation(DISPOSE_ON_CLOSE);

  setLocationRelativeTo(null);// 居屏幕中间显示

 }

 /**

  * 初始化组件

  */

 private void initComponents() {

  titlelb= new JLabel("注   册");

  nameLb = new JLabel("用户名");

  nameLb.setFont(new Font("宋体", Font.PLAIN, 15));

  passwordLb = new JLabel("\u5BC6  \u7801");

  passwordLb.setFont(new Font("宋体", Font.PLAIN, 15));

  sexLb = new JLabel("\u6027  \u522B");

  sexLb.setFont(new Font("宋体", Font.PLAIN, 15));

  phoneLb = new JLabel("联系电话"); 

  phoneLb.setFont(new Font("宋体", Font.PLAIN, 15));

  emailLb = new JLabel("\u90AE  \u7BB1");

  emailLb.setFont(new Font("宋体", Font.PLAIN, 15));

  

  nameTf=new JTextField();

  passwordTf=new JPasswordField();

  maleRbtn=new JRadioButton("男");

  maleRbtn.setFont(new Font("宋体", Font.PLAIN, 15));

  femaleRbtn=new JRadioButton("女");

  femaleRbtn.setFont(new Font("宋体", Font.PLAIN, 15));

  phoneTf=new JTextField();

  emailTf=new JTextField();

  

  okBtn = new JButton("确定");

  okBtn.setFont(new Font("宋体", Font.PLAIN, 15));

  resetBtn = new JButton("重置");

  resetBtn.setFont(new Font("宋体", Font.PLAIN, 15));

 }

 /**

  * 布局组件

  */

 private void layoutComponents() {

  getContentPane().setLayout(null);// 去除默认的边界布局

  

  titlelb.setBounds(182, 20, 80, 30);

  titlelb.setFont(new Font("", Font.BOLD, 26));

  

  nameLb.setBounds(100, 85, 80, 30);

  nameTf.setBounds(200, 86, 250, 30);

  

  passwordLb.setBounds(100, 143, 80, 30);

  passwordTf.setBounds(200, 144, 250, 30);

  

  sexLb.setBounds(100, 194, 80, 30);

  maleRbtn.setBounds(200, 194, 50, 30);

  femaleRbtn.setBounds(262, 194, 50, 30);

  ButtonGroup btnGrounp = new ButtonGroup();

  btnGrounp.add(maleRbtn);

  btnGrounp.add(femaleRbtn);

  maleRbtn.setSelected(true);

  

  emailLb.setBounds(100,251,80,30);

  emailTf.setBounds(200, 252, 250, 30);

  

  phoneLb.setBounds(100,319,80,30);

  phoneTf.setBounds(200, 320, 250, 30);

  

  okBtn.setBounds(151, 386, 80, 30);

  resetBtn.setBounds(289, 386, 80, 30);

  

  getContentPane().add(titlelb);

  getContentPane().add(nameLb);

  getContentPane().add(nameTf);

  getContentPane().add(passwordLb);

  getContentPane().add(passwordTf);

  getContentPane().add(sexLb);

  getContentPane().add(maleRbtn);

  getContentPane().add(femaleRbtn);

  getContentPane().add(emailLb);

  getContentPane().add(emailTf);

  getContentPane().add(phoneLb);

  getContentPane().add(phoneTf);

  getContentPane().add(okBtn);

  getContentPane().add(resetBtn);

 }

 /**

  * 添加监听器

  */

 private void addListeners() {

  okBtn.addActionListener(this);

  resetBtn.addActionListener(this);

 }

 /**

  * 点击按钮触发的操作都写在这里

  */

 @Override

 public void actionPerformed(ActionEvent e) {

  if(e.getSource() == okBtn){//点击确定按钮

   resiger();//注册

  }else if(e.getSource()==resetBtn){//点击重置按钮

   reset();//重置

  }

 }

 

 //注册

 private void resiger() {

  String name = nameTf.getText();

  String password = new String(passwordTf.getPassword());

  String sex = "男";

  if(femaleRbtn.isSelected()){

   sex = "女";

  } 

  String phonestr = phoneTf.getText();

  Integer phone = new  Integer(phonestr);

  String email = emailTf.getText();

  

  User user = new User();

  user.setName(name);

  user.setPassword(password);

  user.setSex(sex);

  user.setPhone(phone);

  user.setEmail(email);

 

  try {

   service.resiger(user);

   JOptionPane.showMessageDialog(this, "注册成功");

   dispose();

   new LoginFrame().setVisible(true);  //切换界面

  } catch (ServiceException e) {

   e.printStackTrace();

   JOptionPane.showMessageDialog(this, e.getMessage());

  } 

 }

 

 /**重置*/

 private void reset
a728
() {

  nameTf.setText("");

  passwordTf.setText("");

  maleRbtn.setSelected(true);

  femaleRbtn.setSelected(false);

  phoneTf.setText("");

  emailTf.setText("");

  nameTf.requestFocus();//获得焦点

 }

}

 

登录代码略写，效果如下图





 

 

查看数据库，已成功导入数据



 

 

登录成功



 

关键代码（包括上一篇的ＪＤＢＣ工具类）

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

import day2.rowmapper.UserRowmapper;

import day2.util.JDBCUtils;

import day2.util.RowMapper;

import day3.dao.UserDao;

import day3.entity.User;

public class UserDaoImpl implements  UserDao {

 //根据用户名查询用户

 public User findByName(String name) {

   Connection conn = null;

   List<User> list = new ArrayList<User>();

   try {

    conn = JDBCUtils.getConnection();

    String sql = "select * from user where name= ? ";

    Object[] params = {name };

    RowMapper rm = new UserRowmapper();

    list = JDBCUtils.executeQuery(conn, sql, params, rm);

    if (null != list && list.size() > 0) {

     return list.get(0);

    }

   } catch (SQLException e) {

    e.printStackTrace();

   } finally {

    JDBCUtils.close(conn);

   }

   return null;

  }

  

 //用户注册

 public User resiger(User user) {

  Connection conn = null;

  try {

   conn = JDBCUtils.getConnection();

   String sql = "insert into user (name,password,sex,phone,email) "

     + "values (?,?,?,?,?)";

   Object[] params = { user.getName(),user.getPassword(),user.getSex(),user.getPhone(),user.getEmail() };

    JDBCUtils.executeUpdate(conn, sql, params);

  

  } catch (SQLException e) {

   e.printStackTrace();

  } finally {

   JDBCUtils.close(conn);

  }

  return null;

 }

 //用户登录

 public   String login(String loginname, String loginpsd) {

  Connection conn = null;

  try {

   conn = JDBCUtils.getConnection();

   String sql="select * from user where name=? and password=?";

   PreparedStatement pst = conn.prepareStatement(sql);

   pst.setObject(1, loginname);

   pst.setObject(2, loginpsd);

   ResultSet rs = pst.executeQuery();

   if(rs.next()){

    return null;

   }

   return "登录失败，用户名或密码错误";

   

  }catch (SQLException e) {

   return "登录异常";

  } finally {

   JDBCUtils.close(conn);

  }

 }

}

先简单到这，有不明白或者需要源码指导的初学的童鞋，可以私信我！！