java 不用数据库连接池和用有什么区别不用数据库的java管理系统

转载
mob6454cc6172e5 2023-12-27 13:23:07
文章标签 如何把java 学生管理数据库下载 java ide d3 文章分类 Java 后端开发
【实例简介】学生管理系统，java代码。用txt文件进行存取，结构简单，代码也比较简单。
【实例截图】
java 不用数据库连接池和用有什么区别不用数据库的java管理系统_ide
java 不用数据库连接池和用有什么区别不用数据库的java管理系统_d3_02
java 不用数据库连接池和用有什么区别不用数据库的java管理系统_java_03
java 不用数据库连接池和用有什么区别不用数据库的java管理系统_d3_04
【核心代码】
package student;
import java.awt.BorderLayout;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Jiemain {
private JPanel panel1=new JPanel();
private JFrame frame=new JFrame();
private ImageIcon bg = new ImageIcon("img/background.jpg");
public WriterRead wr=new WriterRead();
public Information ints=new Information();
public Seek seek=new Seek();
public String[][] students=wr.getxueshengs();
public String[] interest=ints.getinterest();
public void begin() {
// 加载背景图片
JLabel label = new JLabel(bg);
//把标签的大小位置设置为图片刚好填充整个面
label.setBounds(0,0,bg.getIconWidth(),bg.getIconHeight());
frame.setSize(bg.getIconWidth(),bg.getIconHeight());
//添加图片到frame的第二层
frame.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));
//获取frame的最上层面板为了设置其背景颜色(JPanel有设置透明的方法)
JPanel jp=(JPanel)frame.getContentPane();
jp.setOpaque(false);
//设置透明 //测试用的JPanel
frame.setLocation(400,200);
frame.setVisible(true);
panel1.setOpaque(false);//也要让他透明
panel1.setLayout(null);
login();
}
private void login()
{
panel1.removeAll();
JButton button1_1=new JButton("增加删除修改学生兴趣");
button1_1.setSize(200, 50);
button1_1.setLocation(420, 50);
JButton button1_2=new JButton("查询或修改学生信息");
button1_2.setSize(200, 50);
button1_2.setLocation(420, 150);
JButton button1_3=new JButton("添加学生信息");
button1_3.setSize(200, 50);
button1_3.setLocation(420, 250);
JButton button1_4=new JButton("删除学生信息");
button1_4.setSize(200, 50);
button1_4.setLocation(420, 350);
JButton button1_5=new JButton("查看所有学生信息");
button1_5.setSize(200, 50);
button1_5.setLocation(420, 450);
button1_1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
rewrite_insterst();
}
});
button1_2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
rewrite_student();
}
});
button1_3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
increase_student();
}
});
button1_4.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
delete_student();
}
});
button1_5.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
show_all_students();
}
});
panel1.add(button1_1);
panel1.add(button1_2);
panel1.add(button1_3);
panel1.add(button1_4);
panel1.add(button1_5);
panel1.repaint();
frame.add(panel1);
frame.setVisible(true);
}
public void rewrite_insterst()
{
panel1.removeAll();
JButton button0=new JButton("返回");
button0.setSize(100, 50);
button0.setLocation(40, 0);
JButton button2_1=new JButton("增加学生兴趣");
button2_1.setSize(200, 50);
button2_1.setLocation(420, 50);
JButton button2_2=new JButton("删除学生兴趣");
button2_2.setSize(200, 50);
button2_2.setLocation(420, 150);
JButton button2_3=new JButton("修改学生兴趣");
button2_3.setSize(200, 50);
button2_3.setLocation(420, 250);
button0.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
login();
}
});
button2_1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
increase_interest();
}
});
button2_2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
delete_interest();
}
});
button2_3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
change_interest();
}
});
panel1.add(button0);
panel1.add(button2_1);
panel1.add(button2_2);
panel1.add(button2_3);
panel1.repaint();
frame.setVisible(true);
}
public void increase_interest()
{
String s=JOptionPane.showInputDialog("请输入:");
try
{
ints.write(s);
JOptionPane.showMessageDialog(null, "添加成功","添加学生兴趣", JOptionPane.CLOSED_OPTION);
}
catch(Exception e){
e.toString();
JOptionPane.showMessageDialog(null, "添加出错","添加学生兴趣", JOptionPane.ERROR_MESSAGE);
}
}
public void delete_interest()
{
String s=JOptionPane.showInputDialog("请输入:");
try
{
int k=0;
for(int i=0;i
{
if(interest[i].equals(s))
break;
k ;
}
int b=ints.change(k,"-");
if(b==0)
JOptionPane.showMessageDialog(null, "兴趣中没有这一项","删除学生兴趣", JOptionPane.ERROR_MESSAGE);
else
JOptionPane.showMessageDialog(null, "删除成功","删除学生兴趣", JOptionPane.CLOSED_OPTION);
}
catch(Exception e){
e.toString();
JOptionPane.showMessageDialog(null, "删除出错","删除学生兴趣", JOptionPane.ERROR_MESSAGE);
}
}
public void change_interest()
{
String s=JOptionPane.showInputDialog("请输入要修改的兴趣:");
String t=JOptionPane.showInputDialog("请输入要修改后的兴趣:");
try
{
int k=0;
for(int i=0;i
{
if(interest[i].equals(s))
break;
k ;
}
int b=ints.change(k,t);
if(b==0)
JOptionPane.showMessageDialog(null, "兴趣中没有这一项","改变学生兴趣", JOptionPane.ERROR_MESSAGE);
else
JOptionPane.showMessageDialog(null, "改变成功","改变学生兴趣", JOptionPane.CLOSED_OPTION);
}
catch(Exception e){
e.toString();
JOptionPane.showMessageDialog(null, "删除出错","删除学生兴趣", JOptionPane.ERROR_MESSAGE);
}
}
public void rewrite_student()
{
panel1.removeAll();
JButton button0=new JButton("返回");
button0.setSize(100, 50);
button0.setLocation(40, 0);
JButton button2_1=new JButton("学号查询学生");
button2_1.setSize(200, 50);
button2_1.setLocation(420, 100);
JButton button2_2=new JButton("关键字查找学生");
button2_2.setSize(200, 50);
button2_2.setLocation(420, 250);
JButton button2_3=new JButton("按兴趣查找学生");
button2_3.setSize(200, 50);
button2_3.setLocation(420, 400);
JTextField textField1=new JTextField();
textField1.setSize(300, 30);
textField1.setLocation(420, 70);
JTextField textField2=new JTextField();
textField2.setSize(300, 30);
textField2.setLocation(420, 220);
JTextField textField3=new JTextField();
textField3.setSize(300, 30);
textField3.setLocation(420, 370);
button0.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
login();
}
});
button2_1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s=JOptionPane.showInputDialog("请输入学号:");
String[][] ss=seek.findstudents(s);
chaozuo(ss);
}
});
button2_2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s=JOptionPane.showInputDialog("请输入关键字:");
String[][] ss=seek.findstudents(s);
chaozuo(ss);
}
});
button2_3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s=JOptionPane.showInputDialog("请输入兴趣:");
String[][] ss=seek.findbyinterest(s);
chaozuo(ss);
}
});
panel1.add(button0);
panel1.add(button2_1);
panel1.add(button2_2);
panel1.add(button2_3);
panel1.repaint();
frame.setVisible(true);
}
@SuppressWarnings({ "null", "unchecked" })
public void increase_student()
{
panel1.removeAll();
JLabel label1 = new JLabel();
label1.setText("学生学号");
label1.setSize(300, 30);
label1.setLocation(400, 10);
JButton button0=new JButton("返回");
button0.setSize(100, 50);
button0.setLocation(40,0);
button0.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
login();
}
});
JTextField textField1=new JTextField();
textField1.setSize(300, 30);
textField1.setLocation(400, 50);
JLabel label2 = new JLabel();
label2.setText("学生姓名");
label2.setSize(300, 30);
label2.setLocation(400, 110);
JTextField textField2=new JTextField();
textField2.setSize(300, 30);
textField2.setLocation(400, 150);
JLabel nianji = new JLabel();
nianji.setText("请选择年纪");
nianji.setSize(300, 30);
nianji.setLocation(400, 210);
@SuppressWarnings("rawtypes")
JComboBox comboBox=new JComboBox();
comboBox.addItem("2012");
comboBox.addItem("2013");
comboBox.addItem("2014");
comboBox.addItem("2015");
comboBox.addItem("2016");
comboBox.addItem("2017");
comboBox.setSize(100, 40);
comboBox.setLocation(400, 250);
JLabel label3 = new JLabel();
label3.setText("学生专业");
label3.setSize(300, 30);
label3.setLocation(400, 310);
JTextField textField3=new JTextField();
textField3.setSize(300, 30);
textField3.setLocation(400, 350);
JLabel label4 = new JLabel();
label4.setText("请选择性别");
label4.setSize(100, 30);
label4.setLocation(350, 380);
JRadioButton s1=new JRadioButton("男",true);
JRadioButton s2=new JRadioButton("女");
ButtonGroup bg = new ButtonGroup();
bg.add(s1);
bg.add(s2);
JPanel jp1=new JPanel();
jp1.setOpaque(false);
jp1.setSize(300, 100);
jp1.setLocation(450, 380);
jp1.add(s1);
jp1.add(s2);
JCheckBox[] its= new JCheckBox[interest.length];
JLabel label5=new JLabel();
label5.setText("请选择兴趣");
label5.setSize(100, 30);
label5.setLocation(350, 400);
JPanel jp2=new JPanel();
jp2.setLocation(450, 430);
jp2.setSize(300, 150);
jp2.setOpaque(false);
for(int i=0;i
{
its[i]=new JCheckBox(interest[i]);
jp2.add(its[i],BorderLayout.CENTER);
}
JButton button1=new JButton("确定添加");
button1.setSize(100, 50);
button1.setLocation(400, 580);
button1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String id,name,sex,year,major,like="";
id=textField1.getText();
name=textField2.getText();
major=textField3.getText();
year=comboBox.getSelectedItem().toString();
if(s1.isSelected())
sex="男";
else sex="女";
for(int i=0;i
{
if(its[i].isSelected())
like =Integer.toString(i) ";";
}
if(id.equals("")||!id.matches("[0-9] "))
JOptionPane.showMessageDialog(null, "学号为空或不是纯数字","添加学生信息", JOptionPane.ERROR_MESSAGE);
else if(name.equals(""))
JOptionPane.showMessageDialog(null, "姓名为空","添加学生信息", JOptionPane.ERROR_MESSAGE);
else if(year.equals(""))
JOptionPane.showMessageDialog(null, "年级为空","添加学生信息", JOptionPane.ERROR_MESSAGE);
else if(major.equals(""))
JOptionPane.showMessageDialog(null, "专业为空", "添加学生信息", JOptionPane.ERROR_MESSAGE);
else {
wr.write(id "|" name "|" sex "|" year "|" major "|" like);
JOptionPane.showMessageDialog(null, "添加成功","添加学生信息", JOptionPane.CLOSED_OPTION);
}
}
});
panel1.add(textField1);
panel1.add(textField2);
panel1.add(textField3);
panel1.add(jp1);
panel1.add(jp2);
panel1.add(button0);
panel1.add(button1);
panel1.add(comboBox);
panel1.add(label1);
panel1.add(label2);
panel1.add(label3);
panel1.add(label4);
panel1.add(label5);
panel1.add(nianji);
panel1.repaint();
frame.setVisible(true);
}
public void delete_student()
{
panel1.removeAll();
JButton button0=new JButton("返回");
button0.setSize(100, 50);
button0.setLocation(40, 0);
JButton button2_1=new JButton("学号删除学生");
button2_1.setSize(200, 50);
button2_1.setLocation(420, 50);
JButton button2_2=new JButton("关键字删除学生");
button2_2.setSize(200, 50);
button2_2.setLocation(420, 150);
JButton button2_3=new JButton("按兴趣删除学生");
button2_3.setSize(200, 50);
button2_3.setLocation(420, 250);
button0.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
login();
}
});
button2_1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s=JOptionPane.showInputDialog("请输入学号:");
String[][] ss=seek.findstudents(s);
if(ss[0][0]==null)
{
JOptionPane.showMessageDialog(null, "学号为空","删除学生信息", JOptionPane.ERROR_MESSAGE);
}
else
{int j=0;
while(ss[j][0]!=null)
{
wr.delete(Integer.parseInt(ss[j][6]));
j ;
}
JOptionPane.showMessageDialog(null, "删除成功","修改学生信息", JOptionPane.CLOSED_OPTION);
}
}
});
button2_2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s=JOptionPane.showInputDialog("请输入关键字:");
String[][] ss=seek.findstudents(s);
if(ss[0][0]==null)
{
JOptionPane.showMessageDialog(null, "关键字空","删除学生信息", JOptionPane.ERROR_MESSAGE);
}
else
{
int j=0;
while(ss[j][0]!=null)
{
wr.delete(Integer.parseInt(ss[j][6]));
j ;
}
JOptionPane.showMessageDialog(null, "删除成功","删除学生信息", JOptionPane.CLOSED_OPTION);
}
}
});
button2_3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s=JOptionPane.showInputDialog("请输入兴趣:");
String[][] ss=seek.findbyinterest(s);
if(ss[0][0]==null)
{
JOptionPane.showMessageDialog(null, "兴趣为空","删除学生信息", JOptionPane.ERROR_MESSAGE);
}
else
{
int j=0;
while(ss[j][0]!=null)
{
wr.delete(Integer.parseInt(ss[j][6]));
j ;
}
JOptionPane.showMessageDialog(null, "删除成功","修改学生信息", JOptionPane.CLOSED_OPTION);
}
}
});
panel1.add(button0);
panel1.add(button2_1);
panel1.add(button2_2);
panel1.add(button2_3);
panel1.repaint();
frame.setVisible(true);
}
public void show_all_students()
{
JTable table;
JButton bt1 = new JButton("修改");
JButton bt2 = new JButton("删除");
JPanel btnPanel = new JPanel(new java.awt.GridLayout(1, 2));
btnPanel.add(bt1);
btnPanel.add(bt2);
DefaultTableModel defaultTableModel;
JScrollPane scrollPane;
scrollPane = new JScrollPane();
scrollPane.setSize(600, 400);
//创建一个只有表头的表格模型
defaultTableModel = new DefaultTableModel(new Object[][]{},
new String[]{"学号", "姓名", "性别","年级","专业","兴趣"});
for(int i=0;students[i][0]!=null;i )
{
String[] in=students[i][5].split("\\;");
String k=new String();
try {
int[] a=new int[in.length];
for(int j=0;j
{
a[j] = Integer.parseInt(in[j]);
if(interest[a[j]]!="-")
k =interest[a[j]] "--";
}
} catch (NumberFormatException e) {
e.printStackTrace();
}
defaultTableModel.insertRow(i,new Object[]{
students[i][0], students[i][1], students[i][2],students[i][3],students[i][4],k,});
}
//将students中非空元素插入表中
table = new JTable(defaultTableModel);
table.setSize(600, 400);
table.setLocation(500, 200);
table.updateUI();
JScrollPane jspane=new JScrollPane(table);
JFrame jf=new JFrame();
jf.setSize(600, 500);
jf.setLocation(500, 200);
jf.add("Center",jspane);
//jf.add("South",btnPanel);
//jf.add(bt2);
jf.setVisible(true);
}
public void chaozuo(String[][] ss)
{
JTable table;
JButton bt1 = new JButton("修改");
JButton bt2 = new JButton("删除");
JPanel btnPanel = new JPanel(new java.awt.GridLayout(1, 2));
btnPanel.add(bt1);
btnPanel.add(bt2);
DefaultTableModel defaultTableModel;
JScrollPane scrollPane;
scrollPane = new JScrollPane();
scrollPane.setSize(500, 400);
//创建一个只有表头的表格模型
defaultTableModel = new DefaultTableModel(new Object[][]{},
new String[]{"学号", "姓名", "性别","年级","专业","兴趣"});
for(int i=0;ss[i][0]!=null;i )
{
String[] in=ss[i][5].split("\\;");
String k=new String();
try {
int[] a=new int[in.length];
for(int j=0;j
{
a[j] = Integer.parseInt(in[j]);
if(interest[a[j]]!="-")
k =interest[a[j]] "--";
}
} catch (NumberFormatException e1) {
e1.printStackTrace();
}
defaultTableModel.insertRow(i,new Object[]{
ss[i][0], ss[i][1], ss[i][2],ss[i][3],ss[i][4],k,});
}
//将students中非空元素插入表中
table = new JTable(defaultTableModel);
table.setSize(500, 400);
table.setLocation(500, 200);
table.updateUI();
JScrollPane jspane=new JScrollPane(table);
JFrame jf=new JFrame();
jf.setSize(600, 500);
jf.setLocation(500, 200);
jf.add("Center",jspane);
jf.add("South",btnPanel);
//jf.add(bt2);
jf.setVisible(true);
bt1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int n=table.getSelectedRow();
panel1.removeAll();
JLabel label1 = new JLabel();
label1.setText("学生学号");
label1.setSize(300, 30);
label1.setLocation(400, 10);
JButton button0=new JButton("返回");
button0.setSize(100, 50);
button0.setLocation(40,0);
button0.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
login();
}
});
JTextField textField1=new JTextField();
textField1.setSize(300, 30);
textField1.setLocation(400, 50);
JLabel label2 = new JLabel();
label2.setText("学生姓名");
label2.setSize(300, 30);
label2.setLocation(400, 110);
JTextField textField2=new JTextField();
textField2.setSize(300, 30);
textField2.setLocation(400, 150);
JLabel nianji = new JLabel();
nianji.setText("请选择年纪");
nianji.setSize(300, 30);
nianji.setLocation(400, 210);
JComboBox comboBox=new JComboBox();
comboBox.addItem("2012");
comboBox.addItem("2013");
comboBox.addItem("2014");
comboBox.addItem("2015");
comboBox.addItem("2016");
comboBox.addItem("2017");
comboBox.setSize(100, 40);
comboBox.setLocation(400, 250);
JLabel label3 = new JLabel();
label3.setText("学生专业");
label3.setSize(300, 30);
label3.setLocation(400, 310);
JTextField textField3=new JTextField();
textField3.setSize(300, 30);
textField3.setLocation(400, 350);
JLabel label4 = new JLabel();
label4.setText("请选择性别");
label4.setSize(100, 30);
label4.setLocation(350, 380);
JRadioButton s1=new JRadioButton("男",true);
JRadioButton s2=new JRadioButton("女");
ButtonGroup bg = new ButtonGroup();
bg.add(s1);
bg.add(s2);
JPanel jp1=new JPanel();
jp1.setOpaque(false);
jp1.setSize(300, 100);
jp1.setLocation(450, 380);
jp1.add(s1);
jp1.add(s2);
JCheckBox[] its= new JCheckBox[interest.length];
JLabel label5=new JLabel();
label5.setText("请选择兴趣");
label5.setSize(100, 30);
label5.setLocation(350, 400);
JPanel jp2=new JPanel();
jp2.setLocation(450, 430);
jp2.setSize(300, 150);
jp2.setOpaque(false);
for(int i=0;i
{
its[i]=new JCheckBox(interest[i]);
jp2.add(its[i],BorderLayout.CENTER);
}
JButton button1=new JButton("确定修改");
button1.setSize(100, 50);
button1.setLocation(400, 580);
button1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String id,name,sex,year,major,like="";
id=textField1.getText();
name=textField2.getText();
major=textField3.getText();
year=comboBox.getSelectedItem().toString();
if(s1.isSelected())
sex="男";
else sex="女";
for(int i=0;i
{
if(its[i].isSelected())
like =Integer.toString(i) ";";
}
if(id.equals("")||!id.matches("[0-9] "))
JOptionPane.showMessageDialog(null, "学号为空或不是纯数字","修改学生信息", JOptionPane.ERROR_MESSAGE);
else if(name.equals(""))
JOptionPane.showMessageDialog(null, "姓名为空","修改学生信息", JOptionPane.ERROR_MESSAGE);
else if(year.equals(""))
JOptionPane.showMessageDialog(null, "年级为空","修改学生信息", JOptionPane.ERROR_MESSAGE);
else if(major.equals(""))
JOptionPane.showMessageDialog(null, "专业为空", "修改学生信息", JOptionPane.ERROR_MESSAGE);
else {
String xiugai=new String();
for(int m=0;m<5;m )
{
xiugai =ss[n][m] "|";
}
xiugai =ss[n][5];
System.out.println(xiugai);
wr.change(Integer.parseInt(ss[n][6]),id "|" name "|" sex "|" year "|" major "|" like);
JOptionPane.showMessageDialog(null, "修改成功","修改学生信息", JOptionPane.CLOSED_OPTION);
}
}
});
panel1.add(textField1);
panel1.add(textField2);
panel1.add(textField3);
panel1.add(jp1);
panel1.add(jp2);
panel1.add(button0);
panel1.add(button1);
panel1.add(comboBox);
panel1.add(label1);
panel1.add(label2);
panel1.add(label3);
panel1.add(label4);
panel1.add(label5);
panel1.add(nianji);
panel1.repaint();
panel1.repaint();
frame.setVisible(true);
}
});
bt2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int n=table.getSelectedRow();
int k=Integer.parseInt(ss[n][6]);
wr.delete(k);
JOptionPane.showMessageDialog(null, "删除成功","修改学生信息", JOptionPane.CLOSED_OPTION);
}
});
}
}
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