房屋管理系统【Swing窗口+MySQL】（Java课设）

import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class OutOrInterWare extends JFrame { public OutOrInterWare() { this.setTitle("商品出入库界面");//设置窗口标题 this.setBounds(100, 100, 500, 700);//设置窗口大小 this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);//设置关闭子窗口但是不关闭父类窗口 this.setLayout(null);//设置布局方式为null，自己控制组件位置 //创建标签和按钮 JLabel jLabel = new JLabel("商品出入库界面"); JLabel jLabel1 = new JLabel("记录编号："); JLabel jLabel2 = new JLabel("商品编号："); JLabel jLabel3 = new JLabel("操作类型："); JLabel jLabel4 = new JLabel("操作数量："); JLabel jLabel5 = new JLabel("操作时间："); JButton jb1 = new JButton("操作"); //创建文本框和面板 JTextField field1 = new JTextField(18); JTextField field2 = new JTextField(18); JTextField field3 = new JTextField(18); JTextField field4 = new JTextField(18); JTextField field5 = new JTextField(18); //创建面板 JPanel jPanel = new JPanel(); JPanel jPanel0 = new JPanel(); JPanel jPanel1 = new JPanel(); JPanel jPanel2 = new JPanel(); JPanel jPanel3 = new JPanel(); JPanel jPanel4 = new JPanel(); JPanel jPanel5 = new JPanel(); //将标签和文本框添加到面板中 jPanel.add(jLabel); jPanel1.add(jLabel1); jPanel1.add(field1); jPanel2.add(jLabel2); jPanel2.add(field2); jPanel3.add(jLabel3); jPanel3.add(field3); jPanel4.add(jLabel4); jPanel4.add(field4); jPanel5.add(jLabel5); jPanel5.add(field5); jPanel0.add(jb1); //设置面板位置和大小 jPanel.setBounds(0, 40, 450, 50); jPanel1.setBounds(0, 110, 450, 50); jPanel2.setBounds(0, 180, 450, 50); jPanel3.setBounds(0, 250, 450, 50); jPanel4.setBounds(0, 320, 450, 50); jPanel5.setBounds(0, 390, 450, 50); jPanel0.setBounds(0, 460, 450, 50); //设置字体大小 jLabel.setFont(new Font("微软雅黑", Font.PLAIN, 20)); jLabel1.setFont(new Font("微软雅黑", Font.PLAIN, 20)); jLabel2.setFont(new Font("微软雅黑", Font.PLAIN, 20)); jLabel3.setFont(new Font("微软雅黑", Font.PLAIN, 20)); jLabel4.setFont(new Font("微软雅黑", Font.PLAIN, 20)); jLabel5.setFont(new Font("微软雅黑", Font.PLAIN, 20)); jb1.setFont(new Font("微软雅黑", Font.PLAIN, 20)); //将面板添加到窗口中 this.add(jPanel); this.add(jPanel1); this.add(jPanel2); this.add(jPanel3); this.add(jPanel4); this.add(jPanel5); this.add(jPanel0); //设置界面可见 this.setVisible(true); UIManager.put("OptionPane.messageFont", new Font("微软雅黑", Font.PLAIN, 15)); jb1.addActionListener (new ActionListener() { public void actionPerformed(ActionEvent e) { //注册驱动 使用驱动连接数据库 Connection con = null; PreparedStatement stmt = null; ResultSet rs = null; try { con = JDBCUtils.getConnection(); //判断药品是否存在 String sql = "select * from product where id = ?"; stmt = con.prepareStatement(sql); stmt.setString(1, field2.getText()); // 执行查询 rs = stmt.executeQuery(); if (!rs.next()) { //ResultSet 为空 JOptionPane.showMessageDialog(null, "对应商品不存在！"); return; }else{ if (field3.getText().equals("入库")){ int num = rs.getInt("num"); String sql2 = "update product set num=? where id=?"; stmt = con.prepareStatement(sql2); stmt.setInt(1, num+ Integer.parseInt(field4.getText())); stmt.setString(2, field2.getText()); stmt.execute(); String sql3 = "insert into record values(?,?,?,?,?)"; stmt = con.prepareStatement(sql3); stmt.setString(1, field1.getText()); stmt.setString(2, field2.getText()); stmt.setString(3, field3.getText()); stmt.setString(4, field4.getText()); stmt.setString(5, field5.getText()); stmt.execute(); JOptionPane.showMessageDialog(null, "操作成功！"); }else if (field3.getText().equals("出库")){ int num = rs.getInt("num"); if (num<Integer.parseInt(field4.getText())){ JOptionPane.showMessageDialog(null, "库存不足！"); return; } String sql2 = "update product set num=? where id=?"; stmt = con.prepareStatement(sql2); stmt.setInt(1, num- Integer.parseInt(field4.getText())); stmt.setString(2, field2.getText()); stmt.execute(); String sql3 = "insert into record values(?,?,?,?,?)"; stmt = con.prepareStatement(sql3); stmt.setString(1, field1.getText()); stmt.setString(2, field2.getText()); stmt.setString(3, field3.getText()); stmt.setString(4, field4.getText()); stmt.setString(5, field5.getText()); stmt.execute(); JOptionPane.showMessageDialog(null, "操作成功！"); }else{ JOptionPane.showMessageDialog(null, "操作类型请填写入库或者出库！"); return; } } } catch (Exception e2) { // TODO Auto-generated catch block e2.printStackTrace(); }finally { try { JDBCUtils.close(rs, stmt, con); } catch (SQLException throwables) { throwables.printStackTrace(); } } } }); } }