Java学生信息管理系统

package stu.management; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.*; import java.util.ArrayList; import java.util.List; import javax.swing.*; import stu.database.DBConnection; import stu.login.Students; public class SearchManagement extends JFrame implements ActionListener { private static final long serialVersionUID = 1L; private Object [][]rowData; private Object []column = {"学号","姓名","性别","生日","班级","学院"}; //表头 JPanel epanel = new JPanel(); JPanel spanel = new JPanel(); JPanel wpanel = new JPanel(); JLabel JLNumber = new JLabel("学号"); JTextField JTNumber = new JTextField(16); JButton searchBtn = new JButton("查询个人"); JButton searchAllBtn = new JButton("查询全部"); JButton nextBtn = new JButton("重置"); JButton cancelBtn = new JButton("取消"); public SearchManagement() { this.setTitle("查询信息"); this.setLayout(new BorderLayout()); //标签和输入框 wpanel.add(searchAllBtn); wpanel.add(JLNumber); wpanel.add(JTNumber); //三个按钮添加事件 searchAllBtn.addActionListener(this); searchBtn.addActionListener(this); nextBtn.addActionListener(this); cancelBtn.addActionListener(this); epanel.add(searchBtn); epanel.add(nextBtn); epanel.add(cancelBtn); this.add(epanel, BorderLayout.EAST); this.add(wpanel, BorderLayout.WEST); this.pack(); this.setLocationRelativeTo(null);//窗体居中显示 this.setVisible(true); } /** * 设置表格的样式 * @param num */ public void setTable(int num) { this.setVisible(false); JFrame jf =new JFrame("查询结果"); jf.setLocationRelativeTo(null); JPanel panel = new JPanel(); //表格所有行 Object [][]rowData = queryData(num); JTable table = new JTable(rowData,column); //设置表格内容颜色 table.setForeground(Color.BLACK); //字体颜色 table.setFont(new Font(null, Font.PLAIN, 14)); //字体样式 table.setSelectionBackground(Color.DARK_GRAY); //选中后字体背景 table.setSelectionForeground(Color.LIGHT_GRAY); //选中后字体颜色 table.setGridColor(Color.GRAY); //网格颜色 //设置表头 //设置表头字体样式 table.getTableHeader().setFont(new Font(null, Font.BOLD, 14)); //表头名称字体颜色 table.getTableHeader().setForeground(Color.RED); //不允许手动改变列宽 table.getTableHeader().setResizingAllowed(true); //不允许拖动重新排列各列 table.getTableHeader().setReorderingAllowed(true); //设置行高30 table.setRowHeight(30); //列宽设置为100 table.getColumnModel().getColumn(0).setPreferredWidth(80); table.getColumnModel().getColumn(3).setPreferredWidth(120); table.getColumnModel().getColumn(4).setPreferredWidth(120); table.getColumnModel().getColumn(5).setPreferredWidth(180); //设置滚动面板视口大小 table.setPreferredScrollableViewportSize(new Dimension(550,400)); //把表格放到滚动面板中（自动添加到顶部） JScrollPane scrollPane = new JScrollPane(table); panel.add(scrollPane); jf.add(panel); jf.pack(); jf.setContentPane(panel); jf.setVisible(true); } /** * 查询所有用户数据 * @return 查找到的数据生成的list集合 */ public List<Students> queryAllUser(){ Connection conn=null; //预编译语句 PreparedStatement ps=null; //结果集 ResultSet rs=null; String sql="select * from students"; List<Students> list=new ArrayList<Students>(); try { conn=DBConnection.getCon(); //获取结果集 ps=conn.prepareStatement(sql); rs=ps.executeQuery(); while(rs.next()){ Students student=new Students(); student.setId(rs.getInt(1)); student.setName(rs.getString(2)); student.setSex(rs.getString(3)); student.setBirthday(rs.getString(4)); student.setClasses(rs.getString(5)); student.setAcademy(rs.getString(6)); list.add(student); } conn.close(); } catch (SQLException e) { e.printStackTrace(); } return list; } /** * 查询一个用户数据(用户id) * @return 查找到的用户数据返回 */ public Students queryUser(Integer id){ Connection conn=null; //预编译语句 PreparedStatement ps=null; //结果集 ResultSet rs=null; Students student = new Students(); String sql="select * from students where number ="+id; try { conn=DBConnection.getCon(); //获取结果集 ps=conn.prepareStatement(sql); rs=ps.executeQuery(); if(rs.next()){ student.setId(rs.getInt(1)); student.setName(rs.getString(2)); student.setSex(rs.getString(3)); student.setBirthday(rs.getString(4)); student.setClasses(rs.getString(5)); student.setAcademy(rs.getString(6)); }else{ JOptionPane.showMessageDialog(null, "学号输入错误，无相关记录！", "错误", JOptionPane.ERROR_MESSAGE); } conn.close(); } catch (SQLException e) { e.printStackTrace(); } System.out.println(student.toString()); return student; } /** * 生成表格数据 * @return 表格数据二维数组 */ public Object[][] queryData(int num){ if(num == 0) { List<Students> list=queryAllUser(); rowData=new Object[list.size()][column.length]; System.out.println("查询全部信息"); for(int i=0;i<list.size();i++){ for(int j=0;j<column.length;j++) { rowData[i][0]=list.get(i).getId(); rowData[i][1]=list.get(i).getName(); rowData[i][2]=list.get(i).getSex(); rowData[i][3]=list.get(i).getBirthday(); rowData[i][4]=list.get(i).getClasses(); rowData[i][5]=list.get(i).getAcademy(); System.out.print(rowData[i][j]+" "); } System.out.println(); } }else { Students student = new Students(); student = queryUser(num); //行设置为1,防止数组越界 rowData=new Object[1][column.length]; rowData[0][0]=student.getId(); rowData[0][1]=student.getName(); rowData[0][2]=student.getSex(); rowData[0][3]=student.getBirthday(); rowData[0][4]=student.getClasses(); rowData[0][5]=student.getAcademy(); } return rowData; } @Override public void actionPerformed(ActionEvent e) { if(e.getSource() == searchBtn) { int num = Integer.parseInt(JTNumber.getText()); if(num >0)