java GUI实现学生图书管理简单实例
发布时间：2020-12-14 06:07:39 所属栏目：Java 来源：网络整理
导读：本文实例为大家分享了java GUI学生图书管理的具体代码，供大家参考，具体内容如下 - mysql数据库建表： 1.book表 2.bs借书记录表 3.std学生表 4.dl登录用户表 . - 列表内容 1.databd.java //程序入口及登录验证 import java.awt.*;import java.awt.event.*;i
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本文实例为大家分享了java GUI学生图书管理的具体代码，供大家参考，具体内容如下 - mysql数据库建表： 1.book表
2.bs借书记录表
3.std学生表
4.dl登录用户表 .
- 列表内容 1.databd.java //程序入口及登录验证
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class databd extends JFrame implements ActionListener{
static frameDemo a=null;
String getuser="";
String getpd="";
String sql = "select * from dl where id='";
String sql1 = "select password from dl where password='";
JButton btnNewButton = new JButton("登录");
JButton btnNewButton_1 = new JButton("注册");
JTextField show=new JTextField("t 请选择按钮",10);
private JPanel contentPane;
private JTextField userField;
private JPasswordField pwdField;
private Statement statement = null; //查询账号
private Statement statement2 = null; //注册账户
private static databd frame; //
ResultSet rst2=null;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
frame = new databd();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public databd() {
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:8088/library?useUnicode=true&characterEncoding=utf-8&useSSL=false";
String user = "root";
String password = "22222";
try{
Class.forName(driver);
Connection conn = DriverManager.getConnection(url,user,password);
Connection conn2 = DriverManager.getConnection(url,password);
statement = conn.createStatement();
statement2 = conn2.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
rst2=statement2.executeQuery("select * from dl");
show.setEditable(false);
setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
setSize(250,200);
setLocationRelativeTo(null);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5,5,5));
contentPane.setLayout(null);
add(contentPane);
JLabel lblUsername = new JLabel("账号");
lblUsername.setBounds(12,13,54,15);
contentPane.add(lblUsername);
JLabel lblPassword = new JLabel("密码");
lblPassword.setBounds(12,38,15);
contentPane.add(lblPassword);
userField = new JTextField();
userField.setBounds(76,10,144,21);
contentPane.add(userField);
userField.setColumns(10);
pwdField = new JPasswordField();
pwdField.setEchoChar('*'); //密码回显字符
pwdField.setBounds(76,35,21);
contentPane.add(pwdField);
pwdField.setColumns(10);
add(show,BorderLayout.SOUTH);
btnNewButton.addActionListener(this); //登录
btnNewButton.setBounds(10,92,93,23);
contentPane.add(btnNewButton);
btnNewButton_1.addActionListener(this); //注册
btnNewButton_1.setBounds(127,23);
contentPane.add(btnNewButton_1);
show.addActionListener(this);
}catch(ClassNotFoundException e){System.out.print("不能找到驱动器");
}catch(Exception e){System.out.print("出现错误");e.printStackTrace();}
}
public void actionPerformed(ActionEvent e) {
getuser=userField.getText().trim()+"'";
String pd=String.valueOf(pwdField.getPassword());
try{
ResultSet rs=statement.executeQuery(sql+getuser);
if(e.getSource()==btnNewButton){ //登录
if(rs.next()){
if(rs.getString(2).equals(pd)){
frame.setVisible(false);
JOptionPane.showMessageDialog(null,"登录成功");
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
a=frameDemo.a; //生成静态对象
}else show.setText("t 密码错误");
}
else
show.setText("t 账号不存在");
}
else if(e.getSource()==btnNewButton_1){ //注册
if(userField.getText().equals("")){
show.setText("t 注册账号不能为空");}
else {
if((String.valueOf(pwdField.getPassword())).equals(""))
show.setText("t 注册密码不能为空");
else {register();}
}
}
}catch(Exception c){c.printStackTrace();}
}
private void register(){
String name=userField.getText(),passwd=String.valueOf(pwdField.getPassword());
try{
rst2.moveToInsertRow();
rst2.updateString(1,name);
rst2.updateString(2,passwd);
rst2.insertRow();
rst2.moveToCurrentRow();
show.setText("t 注册成功");
}catch(Exception e){show.setText("t 注册失败");}
}
}
2.frameDemo //主框架，处理事件交给addinformation类
package database;
import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import java.util.Calendar;
import java.util.GregorianCalendar;
public class frameDemo extends JFrame implements ActionListener{
public static frameDemo a=new frameDemo();
JPanel panel=new JPanel(),panel1=new JPanel(),panel2=new JPanel(),panel3=new JPanel(),panel4=new JPanel(),panel5=new JPanel();
String[] adds={"请选择操作","添加馆藏记录","添加借书记录","添加学生记录"};
String[] deletes={"请选择操作","删除馆藏记录","删除借书记录","删除学生记录"};
String[] changes={"请选择操作","修改库存记录","修改应还日期"};
String[] querys={"请选择操作","查询书籍","查询书号","查询学生借书记录","查询学生信息"};
String[] shows={"请选择操作","显示所有馆藏记录","显示借书记录","显示学生记录"};
String[] record=new String[4];
JTextArea ta=new JTextArea("-->欢迎使用系统n",11,60);
JScrollPane pane=new JScrollPane(ta);
Connection conn=null;
Statement stmt=null;
Statement stmt1=null;
Statement stmt2=null;
ResultSet rst=null;
ResultSet rst1=null;
ResultSet rst2=null;
static boolean key;
private JFrame big=new JFrame("请选择操作");
private JComboBox add=new JComboBox(adds);
private JComboBox delete=new JComboBox(deletes);
private JComboBox change=new JComboBox(changes);
private JComboBox query=new JComboBox(querys);
private JComboBox show=new JComboBox(shows);
public frameDemo(){
super("图书馆管理系统");
try{
Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:8088/library?useUnicode=true&characterEncoding=utf-8&useSSL=false";
String user="root";
String password="22222";
conn=DriverManager.getConnection(url,password);
panel4.setLayout(new GridLayout(3,1,30,10));
panel4.setBorder(new TitledBorder("选择管理:"));
panel1.add(new JLabel("添加记录:"));
panel1.add(add);
panel1.add(new JLabel("删除记录:"));
panel1.add(delete);
panel2.add(new JLabel("修改记录:"));
panel2.add(change);
panel2.add(new JLabel("查询记录:"));
panel2.add(query);
panel3.add(new JLabel("显示记录:"));
panel3.add(show);
panel4.add(panel1);panel4.add(panel2);panel4.add(panel3);
panel5.add(pane);
panel.add(panel5,BorderLayout.SOUTH);
panel.add(panel4,BorderLayout.CENTER);
add(panel);
//pack();
stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);//可滚可更
stmt1=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
stmt2=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
add.addActionListener(this);
delete.addActionListener(this);
change.addActionListener(this);
query.addActionListener(this);
show.addActionListener(this);
setSize(470,440);
//setResizable(false);
setLocationRelativeTo(null);
setVisible(true);
setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
}catch(Exception e){e.printStackTrace();}
}
public void actionPerformed(ActionEvent ae){
try{
//if(key){ //数据库非空
if(add.getSelectedIndex()==1){
ta.append("-->添加馆藏记录n");
addinformation a1=new addinformation("图书编号","书名","库存",1);
}
else if(add.getSelectedIndex()==2){
ta.append("-->添加借书记录n");
addinformation a1=new addinformation("图书编号","学号",2);
}
else if(add.getSelectedIndex()==3){
ta.append("-->添加学生记录n");
addinformation a1=new addinformation("学生学号","学生姓名",3);
}
add.setSelectedItem("请选择操作");
if(delete.getSelectedIndex()==1){
ta.append("-->删除馆藏记录n");
addinformation a1=new addinformation("图书编号",4);
}
else if(delete.getSelectedIndex()==2){
ta.append("-->删除借书记录n");
addinformation a1=new addinformation("图书编号","学生学号",5);
}
else if(delete.getSelectedIndex()==3){
ta.append("-->删除学生记录n");
addinformation a1=new addinformation("学生学号",6);
}
delete.setSelectedItem("请选择操作");
if(change.getSelectedIndex()==1){
ta.append("-->修改库存记录n");
addinformation a1=new addinformation("图书编号","库存数目",7);
}
else if(change.getSelectedIndex()==2){
ta.append("-->修改应还日期n");
addinformation a1=new addinformation("图书编号","应还日期",8);
}
change.setSelectedItem("请选择操作");
if(query.getSelectedIndex()==1){
ta.append("-->按书名查询n");
addinformation a1=new addinformation("书名",9);
}
else if(query.getSelectedIndex()==2){
ta.append("-->按书籍编号查询n");
addinformation a1=new addinformation("书籍编号",10);
}
else if(query.getSelectedIndex()==3){
ta.append("-->查询学生借书记录n");
addinformation a1=new addinformation("学生学号",11);
}
else if(query.getSelectedIndex()==4){
ta.append("-->查询学生信息n");
addinformation a1=new addinformation("学生学号",12);
}
query.setSelectedItem("请选择操作");
if(show.getSelectedIndex()==1){
ta.append("-->显示所有馆藏记录n");
try{
rst=stmt.executeQuery("SELECT * FROM book");
rst.first();
ta.append("------------------------------------n");
int id=rst.getInt(1);
String name=rst.getString(2);
int num=rst.getInt(3);
ta.append("t书籍编号t书籍名称t在馆库存n");
ta.append("t"+id+"t"+name+"t"+num+"n");
while(rst.next()){
id=rst.getInt(1);
name=rst.getString(2);
num=rst.getInt(3);
ta.append("t"+id+"t"+name+"t"+num+"n");
}//执行后游标指向最后一行的后一个位置
rst.first();
ta.append("------------------------------------n");
}catch(Exception e){ta.append("-->显示错误");}
}
else if(show.getSelectedIndex()==2){
ta.append("-->显示借书记录n");
rst1=stmt1.executeQuery("SELECT * FROM bs");
Calendar calendar =new GregorianCalendar();
try{
rst1.first();
ta.append("----------------------------------------------------n");
int bookid=rst1.getInt(2);
int stdid=rst1.getInt(3);
Date x=rst1.getDate(4);
calendar.setTime(x);
calendar.add(calendar.DATE,30);
java.util.Date utilDate = (java.util.Date)calendar.getTime();
utilDate = (java.util.Date)calendar.getTime();
Date newDate =new Date(utilDate.getTime());
ta.append("t书籍编号t学生学号t借书日期tt应还日期n");
ta.append("t"+bookid+"t"+stdid+"t"+x+"t"+newDate+"n");
while(rst1.next()){
bookid=rst1.getInt(2);
stdid=rst1.getInt(3);
x=rst1.getDate(4);
calendar.setTime(x);
calendar.add(calendar.DATE,30);
utilDate = (java.util.Date)calendar.getTime();
utilDate = (java.util.Date)calendar.getTime();
newDate =new Date(utilDate.getTime());
ta.append("t"+bookid+"t"+stdid+"t"+x+"t"+newDate+"n");
}//执行后游标指向最后一行的后一个位置
rst1.first();
ta.append("----------------------------------------------------n");
}catch(Exception e){ta.append("-->显示错误");e.printStackTrace();}
}
else if(show.getSelectedIndex()==3){
ta.append("-->显示学生记录n");
try{
rst2=stmt2.executeQuery("SELECT * FROM std");
rst2.first();
ta.append("------------------------------------n");
int id=rst2.getInt(1);
String name=rst2.getString(2);
ta.append("t学生学号t学生姓名n");
ta.append("t"+id+"t"+name+"t"+"n");
while(rst2.next()){
id=rst2.getInt(1);
name=rst2.getString(2);
ta.append("t"+id+"t"+name+"t"+"n");
}//执行后游标指向最后一行的后一个位置
rst2.first();
ta.append("------------------------------------n");
}catch(Exception e){ta.append("-->显示错误");}
}
show.setSelectedItem("请选择操作");
ta.setCaretPosition(ta.getText().length()); //滚动条保持在最后一条
}catch(Exception e){e.printStackTrace();}
}
public void showMessage(){
try{
int a=rst.getRow();
ta.append(a+"n");
rst.first();
ta.append("---------------------------n");
String id=rst.getString(1),name=rst.getString(2),brand=rst.getString(3),price=rst.getString(4),stock=rst.getString(5);
ta.append(id+" "+name+" "+brand+" "+price+" "+stock+"n");
while(rst.next()){
id=rst.getString(1);
name=rst.getString(2);
brand=rst.getString(3);
price=rst.getString(4);
stock=rst.getString(5);
ta.append(id+" "+name+" "+brand+" "+price+" "+stock+"n");
}//执行后游标指向最后一行的后一个位置
rst.absolute(a);
ta.append("---------------------------n");
}catch(Exception e){ta.append("-->显示错误");}
}
// public static void main(String[] args){
// try{
//UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
// }catch(Exception e){System.out.print("2222222222");}
// a=new frameDemo();
// }
}
3.addinformation.java //处理事件
package database;
import javax.swing.*;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
public class addinformation extends JFrame implements ActionListener{
JButton sure=new JButton("确定"),quxiao=new JButton("取消");
JTextField jtf1=new JTextField(10),jtf2=new JTextField(10),jtf3=new JTextField(10);
Connection conn=null;
static{
try{
Class.forName("com.mysql.jdbc.Driver");
}catch(Exception e){e.printStackTrace();}
}
int x=0;
public Connection getConnection() throws SQLException{
if(conn==null){
conn=DriverManager.getConnection("jdbc:mysql://localhost:8088/library?useUnicode=true&characterEncoding=utf-8&useSSL=false","root","22222");
}
return conn;
}
addinformation(String s1,String s2,String s3,int m){
JPanel p=new JPanel();
p.setLayout(new FlowLayout());
p.add(new JLabel(s1));
p.add(jtf1);
p.add(new JLabel(s2));
p.add(jtf2);
p.add(new JLabel(s3));
p.add(jtf3);
p.add(sure);
p.add(quxiao);
add(p);
if(m==8){
JOptionPane.showMessageDialog(null,"图书日期应为 XXXX-XX-XX 格式！","警告",JOptionPane.WARNING_MESSAGE);
}
setSize(500,100);
setVisible(true);
setDefaultCloSEOperation(JFrame.DISPOSE_ON_CLOSE);
setLocationRelativeTo(null);
sure.addActionListener(this);
quxiao.addActionListener(this);
x=m;
}
addinformation(String s1,int m){
JPanel p=new JPanel();
p.setLayout(new FlowLayout());
p.add(new JLabel(s1));
p.add(jtf1);
p.add(new JLabel(s2));
p.add(jtf2);
p.add(sure);
p.add(quxiao);
add(p);
setSize(500,int m){
JPanel p=new JPanel();
p.setLayout(new FlowLayout());
p.add(new JLabel(s1));
p.add(jtf1);
if(m==4){
JOptionPane.showMessageDialog(null,"若存在借阅记录则不能删除书籍信息！",JOptionPane.WARNING_MESSAGE);
}
if(m==6){
JOptionPane.showMessageDialog(null,"若学生存在借阅记录则不能删除该学生信息！",JOptionPane.WARNING_MESSAGE);
}
p.add(sure);
p.add(quxiao);
add(p);
setSize(500,80);
setVisible(true);
setDefaultCloSEOperation(JFrame.DISPOSE_ON_CLOSE);
setLocationRelativeTo(null);
sure.addActionListener(this);
quxiao.addActionListener(this);
x=m;
}
public void actionPerformed(ActionEvent ae){
if(ae.getSource()==sure){
if(x==1){ //添加 馆藏记录
String sql="INSERT INTO book VALUES(?,?,?)";
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
int id=Integer.parseInt(jtf1.getText());
String name=jtf2.getText();
int num=Integer.parseInt(jtf3.getText());
stmt.setInt(1,id);
stmt.setString(2,name);
stmt.setInt(3,num);
stmt.executeUpdate();
frameDemo.a.ta.append("-->添加成功n");
}catch(Exception x){frameDemo.a.ta.append("-->插入出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==2){ //添加借书记录
String sql="INSERT INTO bs(bookid,stdid,date) VALUES(?,?)";
String sql1="SELECT id,num FROM book WHERE id=?";
String sql2="SELECT id FROM std WHERE id=?";
try{
Connection conn1=getConnection();
PreparedStatement stmt1=conn1.prepareStatement(sql1,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
stmt1.setInt(1,Integer.parseInt(jtf1.getText()));
ResultSet rst1=stmt1.executeQuery();//找有没有这本书和库存是否为0
if(rst1.next()&&(rst1.getInt(2)>0)){
int n=rst1.getInt(2);n-=1;
int m=rst1.getInt(1);
rst1.updateInt(1,m);
rst1.updateInt(2,n);
rst1.updateRow();
Connection conn2=getConnection();
PreparedStatement stmt2=conn2.prepareStatement(sql2);
stmt2.setInt(1,Integer.parseInt(jtf2.getText()));
ResultSet rst2=stmt2.executeQuery();//有人
if(rst2.next()){
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql);
int bookid=Integer.parseInt(jtf1.getText());
int stdid=Integer.parseInt(jtf2.getText());
stmt.setInt(1,bookid);
stmt.setInt(2,stdid);
stmt.setDate(3,new Date(System.currentTimeMillis()));
stmt.executeUpdate();
frameDemo.a.ta.append("-->添加成功n");
}
else{frameDemo.a.ta.append("-->无该学生记录，不能添加借阅记录n");}
}else{frameDemo.a.ta.append("-->无此书或已全部借出n");}
}catch(Exception x){frameDemo.a.ta.append("-->插入出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==3){ //添加学生记录
String sql="INSERT INTO std VALUES(?,?)";
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
int id=Integer.parseInt(jtf1.getText());
String name=jtf2.getText();
stmt.setInt(1,name);
stmt.executeUpdate();
frameDemo.a.ta.append("-->添加成功n");
}catch(Exception x){frameDemo.a.ta.append("-->插入出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==4){ //删除图书记录
String sql="DELETE FROM book WHERE id=?";
String sql1="SELECT * FROM bs WHERE bookid=?";
try{
Connection conn1=getConnection();
PreparedStatement stmt1=conn1.prepareStatement(sql1);
stmt1.setInt(1,Integer.parseInt(jtf1.getText()));
ResultSet rst1=stmt1.executeQuery();
if(rst1.next()){ //借阅记录中有书
JOptionPane.showMessageDialog(null,"借阅记录中有该书的借阅记录！",JOptionPane.WARNING_MESSAGE);
}
else{ //借阅记录无书，可以删掉
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql);
int id=Integer.parseInt(jtf1.getText());
stmt.setInt(1,id);
int t=stmt.executeUpdate();
if(t==0){
frameDemo.a.ta.append("-->删除出错n");
JOptionPane.showMessageDialog(null,"不存在该图书信息！",JOptionPane.WARNING_MESSAGE);
}
else frameDemo.a.ta.append("-->删除记录成功n");
}
}catch(Exception x){frameDemo.a.ta.append("-->删除失败n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==5){ //删除借书记录
String sql="DELETE FROM bs WHERE bookid=? AND stdid=?";
String sql1="SELECT id,num FROM book WHERE id=?";
try{
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql);
int bookid=Integer.parseInt(jtf1.getText());
int stdid=Integer.parseInt(jtf2.getText());
stmt.setInt(1,bookid);
stmt.setInt(2,stdid);
int t=stmt.executeUpdate();
if(t!=0){
Connection conn1=getConnection();
PreparedStatement stmt1=conn1.prepareStatement(sql1,Integer.parseInt(jtf1.getText()));
ResultSet rst1=stmt1.executeQuery();rst1.next();
int m=rst1.getInt(1);
int n=rst1.getInt(2);n+=1;
rst1.updateInt(1,m);
rst1.updateInt(2,n);
rst1.updateRow();
frameDemo.a.ta.append("-->删除借阅记录成功n");
}
else{
frameDemo.a.ta.append("-->删除出错n");
JOptionPane.showMessageDialog(null,"不存在这条借阅记录！",JOptionPane.WARNING_MESSAGE);
}
}catch(Exception x){frameDemo.a.ta.append("-->删除出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==6){ //删除学生记录
String sql="DELETE FROM std WHERE id=?";
String sql1="SELECT * FROM bs WHERE stdid=?";
try {
Connection conn1=getConnection();
PreparedStatement stmt1=conn1.prepareStatement(sql1);
stmt1.setInt(1,Integer.parseInt(jtf1.getText()));
ResultSet rst1=stmt1.executeQuery();
if(rst1.next()){ //借阅记录中有该人
JOptionPane.showMessageDialog(null,"借阅记录中有该人的借阅记录！",JOptionPane.WARNING_MESSAGE);
}
else{
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql);
int stdid=Integer.parseInt(jtf1.getText());
stmt.setInt(1,stdid);
int t=stmt.executeUpdate();
if(t==0){
frameDemo.a.ta.append("-->删除出错n");
JOptionPane.showMessageDialog(null,"不存在该学生记录！",JOptionPane.WARNING_MESSAGE);
}
else frameDemo.a.ta.append("-->删除记录成功n");
}
}catch(Exception x){frameDemo.a.ta.append("-->删除出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==7){ //修改图书库存记录
String sql="UPDATE book SET num=? WHERE id=?";
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
int num=Integer.parseInt(jtf2.getText());
int bookid=Integer.parseInt(jtf1.getText());
stmt.setInt(1,num);
stmt.setInt(2,bookid);
int t=stmt.executeUpdate();
if(t==0){
frameDemo.a.ta.append("-->修改出错n");
JOptionPane.showMessageDialog(null,"不存在该图书记录！",JOptionPane.WARNING_MESSAGE);
}
else frameDemo.a.ta.append("-->修改记录成功n");
}catch(Exception x){frameDemo.a.ta.append("-->修改出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==8){ //修改应还日期
String sql="UPDATE bs SET date=? WHERE bookid=? AND stdid=?";
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
Date date = Date.valueOf(jtf3.getText());
Calendar calendar =new GregorianCalendar();
calendar.setTime(date);
calendar.add(calendar.DATE,-30);
java.util.Date utilDate = (java.util.Date)calendar.getTime();
utilDate = (java.util.Date)calendar.getTime();
Date newDate =new Date(utilDate.getTime());
int stdid=Integer.parseInt(jtf2.getText());
int bookid=Integer.parseInt(jtf1.getText());
stmt.setDate(1,newDate);
stmt.setInt(2,bookid);
stmt.setInt(3,stdid);
int t=stmt.executeUpdate();
if(t==0){
frameDemo.a.ta.append("-->修改出错n");
JOptionPane.showMessageDialog(null,"不存在该借书记录！",JOptionPane.WARNING_MESSAGE);
}
else frameDemo.a.ta.append("-->修改记录成功n");
}catch(Exception x){frameDemo.a.ta.append("-->修改出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==9){ //按书名查询
String sql="SELECT * from book WHERE name=?";
ResultSet rst=null;
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
String name=jtf1.getText();
stmt.setString(1,name);
rst=stmt.executeQuery();
if(rst.next()){
frameDemo.a.ta.append("---------------------------------------n");
frameDemo.a.ta.append("t图书编号t书名t在馆数n");
frameDemo.a.ta.append("t"+rst.getInt(1)+"t"+rst.getString(2)+"t"+rst.getInt(3)+"n");
frameDemo.a.ta.append("---------------------------------------n");
}
else{
frameDemo.a.ta.append("-->查询出错n");
JOptionPane.showMessageDialog(null,"不存在该书！",JOptionPane.WARNING_MESSAGE);
}
}catch(Exception x){frameDemo.a.ta.append("-->查询出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==10){ //按书籍编号查询
String sql="SELECT * from book WHERE id=?";
ResultSet rst=null;
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
stmt.setInt(1,Integer.parseInt(jtf1.getText()));
rst=stmt.executeQuery();
if(rst.next()){
frameDemo.a.ta.append("---------------------------------------n");
frameDemo.a.ta.append("t图书编号t书名t在馆数n");
frameDemo.a.ta.append("t"+rst.getInt(1)+"t"+rst.getString(2)+"t"+rst.getInt(3)+"n");
frameDemo.a.ta.append("---------------------------------------n");
}
else{
frameDemo.a.ta.append("-->查询出错n");
JOptionPane.showMessageDialog(null,JOptionPane.WARNING_MESSAGE);
}
}catch(Exception x){frameDemo.a.ta.append("-->查询出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==11){ //按学生借书记录查询
String sql="SELECT bookid,date from bs WHERE stdid=?";
ResultSet rst=null;
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
stmt.setInt(1,Integer.parseInt(jtf1.getText()));
rst=stmt.executeQuery();
Calendar calendar =new GregorianCalendar();
if(rst.next()){
frameDemo.a.ta.append("----------------------------------------------------n");
frameDemo.a.ta.append("t图书编号t学生学号t借书时间tt应还时间n");
Date x=rst.getDate(3);
calendar.setTime(x);
calendar.add(calendar.DATE,30);
java.util.Date utilDate = (java.util.Date)calendar.getTime();
utilDate = (java.util.Date)calendar.getTime();
Date newDate =new Date(utilDate.getTime());
frameDemo.a.ta.append("t"+rst.getInt(1)+"t"+rst.getInt(2)+"t"+x+"t"+newDate+"n");
while(rst.next()){
x=rst.getDate(3);
calendar.setTime(x);
calendar.add(calendar.DATE,30);
utilDate = (java.util.Date)calendar.getTime();
utilDate = (java.util.Date)calendar.getTime();
newDate =new Date(utilDate.getTime());
frameDemo.a.ta.append("t"+rst.getInt(1)+"t"+rst.getInt(2)+"t"+x+"t"+newDate+"n");
}
frameDemo.a.ta.append("----------------------------------------------------n");
}
else{
frameDemo.a.ta.append("-->查询出错n");
JOptionPane.showMessageDialog(null,JOptionPane.WARNING_MESSAGE);
}
}catch(Exception x){frameDemo.a.ta.append("-->查询出错n");x.printStackTrace();}
addinformation.this.dispose();
}
if(x==12){ //查询学生信息
String sql="SELECT * from std WHERE id=?";
ResultSet rst=null;
try(
Connection conn=getConnection();
PreparedStatement stmt=conn.prepareStatement(sql)){
stmt.setInt(1,Integer.parseInt(jtf1.getText()));
rst=stmt.executeQuery();
if(rst.next()){
frameDemo.a.ta.append("---------------------------------------n");
frameDemo.a.ta.append("t学生学号t学生姓名tn");
frameDemo.a.ta.append("t"+rst.getInt(1)+"t"+rst.getString(2)+"n");
frameDemo.a.ta.append("---------------------------------------n");
}
else{
frameDemo.a.ta.append("-->查询出错n");
JOptionPane.showMessageDialog(null,"不存在该学生！",JOptionPane.WARNING_MESSAGE);
}
}catch(Exception x){frameDemo.a.ta.append("-->查询出错n");x.printStackTrace();}
addinformation.this.dispose();
}
}
if(ae.getSource()==quxiao){
addinformation.this.dispose();
frameDemo.a.ta.append("-->操作取消n");
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程小技巧。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
