以下方法實(shí)現(xiàn)了用戶界面登陸
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import java.awt.*;
import java.awt.event.*;
public class DengLuJieMian extends Frame implements ActionListener
{
Label username=new Label("用戶名：");//使用文本創(chuàng)建一個(gè)用戶名標(biāo)簽
TextField t1=new TextField();//創(chuàng)建一個(gè)文本框?qū)ο?/p>
Label password=new Label("密碼：");//創(chuàng)建一個(gè)密碼標(biāo)簽
TextField t2=new TextField();
Button b1=new Button("登陸");//創(chuàng)建登陸按鈕
Button b2=new Button("取消");//創(chuàng)建取消按鈕
public DengLuJieMian()
{
this.setTitle("學(xué)生信息管理系統(tǒng)");//設(shè)置窗口標(biāo)題
this.setLayout(null);//設(shè)置窗口布局管理器
username.setBounds(50,40,60,20);//設(shè)置姓名標(biāo)簽的初始位置
this.add(username);// 將姓名標(biāo)簽組件添加到容器
t1.setBounds(120,40,80,20);// 設(shè)置文本框的初始位置
this.add(t1);// 將文本框組件添加到容器
password.setBounds(50,100,60,20);//密碼標(biāo)簽的初始位置
this.add(password);//將密碼標(biāo)簽組件添加到容器
t2.setBounds(120,100,80,20);//設(shè)置密碼標(biāo)簽的初始位置
this.add(t2);//將密碼標(biāo)簽組件添加到容器
b1.setBounds(50,150,60,20);//設(shè)置登陸按鈕的初始位置
this.add(b1);//將登陸按鈕組件添加到容器
b2.setBounds(120,150,60,20);//設(shè)置取消按鈕的初始位置
this.add(b2);// 將取消按鈕組件添加到容器
b1.addActionListener(this);//給登陸按鈕添加監(jiān)聽(tīng)器
b2.addActionListener(this);// 給取消按鈕添加監(jiān)聽(tīng)器
this.setVisible(true);//設(shè)置窗口的可見(jiàn)性
this.setSize(300,200);//設(shè)置窗口的大小
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});//通過(guò)內(nèi)部類重寫關(guān)閉窗體的方法
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)//處理登陸事件
{
String name=t1.getText();
String pass=t2.getText();
if(name!=nullpass.equals("000123"))//判斷語(yǔ)句
{
new StudentJieMian();
}
}
}
public static void main(String args[])//主函數(shù)
{
new DengLuJieMian();
}
}
以下方法實(shí)現(xiàn)了學(xué)生界面設(shè)計(jì)
import java.awt.*;
import java.awt.event.*;
class StudentJieMian extends Frame implements ActionListener
{
MenuBar m=new MenuBar();//創(chuàng)建菜單欄
Menu m1=new Menu("信息");//創(chuàng)建菜單“信息”
MenuItem m11=new MenuItem("插入");//創(chuàng)建“插入”的菜單項(xiàng)
MenuItem m12=new MenuItem("查詢");
Menu m2=new Menu("成績(jī)");//創(chuàng)建菜單“成績(jī)”
MenuItem m21=new MenuItem("查詢");
public StudentJieMian()
{
this.setTitle("學(xué)生界面");//設(shè)置窗口標(biāo)題
this.setLayout(new CardLayout());//設(shè)置窗口布局管理器
this.setMenuBar(m);//將菜單欄組件添加到容器
m.add(m1);//將信息菜單放入菜單欄
m.add(m2);
m1.add(m11);//將“插入”菜單項(xiàng)添加到“信息”菜單
m1.add(m12); //將“查詢”菜單項(xiàng)添加到“信息”菜單
m2.add(m21); //將“查詢”菜單項(xiàng)添加到“成績(jī)”菜單
m11.addActionListener(this); //給“插入”菜單項(xiàng)添加監(jiān)聽(tīng)器
m12.addActionListener(this); //給“查詢”菜單項(xiàng)添加監(jiān)聽(tīng)器
m21.addActionListener(this); //給“查詢”菜單項(xiàng)添加監(jiān)聽(tīng)器
this.setVisible(true); //設(shè)置窗口的可見(jiàn)性
this.setSize(300,200); //設(shè)置窗口的大小
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);//關(guān)閉窗口
}
});
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==m11) //處理“添加信息”事件
{
new AddStudent();
}
if(e.getSource()==m12) //處理“查詢信息”事件
{
new SelectStudent();
}
if(e.getSource()==m21) //處理“查詢成績(jī)”事件
{
new ChengJiStudent();
}
}
public static void main(String args[])
{ new StudentJieMian(); //創(chuàng)建一個(gè)對(duì)象 }
對(duì)數(shù)據(jù)庫(kù)進(jìn)行增刪改查？
以下是 sql server 2013+java.實(shí)現(xiàn)的是對(duì)MSC對(duì)象的增刪改查.
需要下載連接驅(qū)動(dòng)程序：com.microsoft.sqlserver.jdbc.SQLServerDriver
網(wǎng)上搜一下就行
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
class MSC
{
public String MscID;
public String MscName;
public String MscCompany;
public float MscLongitude;
public float MscLatitude;
public float MscAltitude;
public MSC(String MscID, String MscName, String MscCompany,
float MscLongitude, float MscLatitude,float MscAltitude){
this.MscID = MscID;
this.MscName = MscName;
this.MscCompany = MscCompany;
this.MscLongitude =MscLongitude;
this.MscLatitude = MscLatitude;
this.MscAltitude = MscAltitude;
}
}
public class sqlserverjdbc {
public Connection getConnection(){
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; //加載JDBC驅(qū)動(dòng)
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=gsm"; //連接服務(wù)器和數(shù)據(jù)庫(kù)sample
String userName = "sa"; //默認(rèn)用戶名
String userPwd = "123"; //密碼
Connection dbConn = null;
try {
Class.forName(driverName);
dbConn =DriverManager.getConnection(dbURL, userName, userPwd);
} catch (Exception e) {
e.printStackTrace();
}
return dbConn;
}
public void printUserInfo(){
Connection con = getConnection();
Statement sta = null;
ResultSet rs = null;
System.out.println("打印表格MSC信息");
try {
sta = con.createStatement();
rs = sta.executeQuery("select * from MSC信息");
System.out.println("MscID\tMscName\tMscCompany\tMscLongitude\tMscLatitude\tMscAltitude");
while(rs.next()){
System.out.println(rs.getString("MscID")+"\t"+
rs.getString("MscName")+"\t"+
rs.getString("MscCompany")+"\t"+
rs.getFloat("MscLongitude")+"\t"+
rs.getFloat("MscLatitude")+"\t"+
rs.getFloat("MscAltitude"));
}
con.close();
sta.close();
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("打印完成\n");
}
public void delete(String MscID){
Connection con = getConnection();
String sql = "delete from MSC信息 where MscID = " + MscID;
PreparedStatement pst;
System.out.println("刪除表格MSC信息中 ID = "+MscID+"的記錄");
try {
pst = con.prepareStatement(sql);
pst.execute();
pst.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("記錄刪除失?。。?！");
}
System.out.println("記錄刪除成功?。。n");
}
public void insert(MSC msc){
Connection con = getConnection();
String sql = "insert into MSC信息 values(?,?,?,?,?,?)";
PreparedStatement pst;
System.out.println("插入一條記錄");
try {
pst = con.prepareStatement(sql);
pst.setString(1, msc.MscID);
pst.setString(2, msc.MscName);
pst.setString(3, msc.MscCompany);
pst.setFloat(4, msc.MscLongitude);
pst.setFloat(5, msc.MscLatitude);
pst.setFloat(6, msc.MscAltitude);
pst.execute();
pst.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("插入失?。。。?);
}
System.out.println("插入成功?。?！\n");
}
//更新MscID的MscName
public void updateMscName(String MscID, String MscName){
Connection con = getConnection();
String sql = "update MSC信息 set MscName = ? where MscID = ?";
PreparedStatement pst;
System.out.println("修改一條記錄");
try {
pst = con.prepareStatement(sql);
pst.setString(1, MscName);
pst.setString(2, MscID);
pst.execute();
pst.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("修改失?。。?！");
}
System.out.println("修改成功?。?！\n");
}
public static void main(String args[]){
sqlserverjdbc sql = new sqlserverjdbc();
sql.printUserInfo();
sql.delete("1111");
sql.printUserInfo();
sql.updateMscName("5215", "聯(lián)想");
sql.printUserInfo();
sql.insert(new MSC("1111", "中興" ," 中興", (float)12.2, (float)3.4,(float)45.5));
sql.printUserInfo();
}
}
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.SwingConstants;
public class MainFrame extends JFrame implements ActionListener{
InsertPanel ip = null;
SelectPanel sp = null;
JPanel pframe;
JButton jb1,jb2,jb3;
JMenuItem jm11,jm21,jm22,jm23,jm31,jm32,jm41,jm42;
CardLayout clayout;
public MainFrame(String s){
super(s);
JMenuBar mb = new JMenuBar();
this.setJMenuBar(mb);
JMenu m1 = new JMenu("系統(tǒng)");
JMenu m2 = new JMenu("基本信息");
JMenu m3 = new JMenu("成績(jī)");
JMenu m4 = new JMenu("獎(jiǎng)懲");
mb.add(m1);
mb.add(m2);
mb.add(m3);
mb.add(m4);
jm11 = new JMenuItem("退出系統(tǒng)");
jm21 = new JMenuItem("輸入");
jm22 = new JMenuItem("查詢");
jm23 = new JMenuItem("更改");
jm31 = new JMenuItem("輸入成績(jī)");
jm32 = new JMenuItem("查詢成績(jī)");
jm41 = new JMenuItem("獎(jiǎng)勵(lì)");
jm42 = new JMenuItem("處分");
m1.add(jm11);
m2.add(jm21);
m2.add(jm22);
m2.add(jm23);
m3.add(jm31);
m3.add(jm32);
m4.add(jm41);
m4.add(jm42);
Icon i1 = new ImageIcon();
Icon i2 = new ImageIcon();
Icon i3 = new ImageIcon();
jb1 = new JButton(i1);
jb1.setToolTipText("輸入");
jb2 = new JButton(i2);
jb2.setToolTipText("查詢");
jb3 = new JButton(i3);
jb3.setToolTipText("退出");
JToolBar tb = new JToolBar("系統(tǒng)工具");
tb.add(jb1);
tb.add(jb2);
tb.add(jb3);
add(tb,BorderLayout.NORTH);
jm11.addActionListener(this);
jm21.addActionListener(this);
jm22.addActionListener(this);
jb1.addActionListener(this);
jb2.addActionListener(this);
jb3.addActionListener(this);
clayout = new CardLayout();
pframe = new JPanel(clayout);
add(pframe);
JPanel mainp = new JPanel(new BorderLayout());
JLabel mainl = new JLabel("學(xué)生信息管理平臺(tái)",SwingConstants.CENTER);
mainl.setFont(new Font("serif",Font.BOLD,30));
mainp.add(mainl);
pframe.add(mainp,"main");
clayout.show(pframe, "main");
}
public void actionPerformed(ActionEvent e){
if(e.getSource() == jm21 || e.getSource() == jb1){
if(ip == null){
ip= new InsertPanel();
pframe.add(ip,"insert");
}
clayout.show(pframe, "insert");
this.setTitle("輸入學(xué)生信息");
}
else if(e.getSource() == jm22 || e.getSource() == jb2){
if(sp == null){
sp= new SelectPanel();
pframe.add(sp,"select");
}
clayout.show(pframe, "select");
this.setTitle("查詢學(xué)生信息");
}
else if(e.getSource() == jm11 || e.getSource() == jb3){
System.exit(0);
}
}
}
第二個(gè)：
import javax.swing.JFrame;
public class MainTest {
public static void main(String [] args){
MainFrame f = new MainFrame("學(xué)生信息管理平臺(tái)");
f.setSize(400,300);
f.setLocation(350,250);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
第二個(gè)：
import java.sql.Connection;
import java.sql.DriverManager;
public class MySQLConnection {
static Connection getCon(){
Connection con = null;
try{
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/test","root","123");
}
catch(Exception e){
System.out.println("建立數(shù)據(jù)庫(kù)連接遇到異常！");
}
return con;
}
}
第四個(gè)：
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class SelectPanel extends JPanel implements ActionListener{
JButton jb;
JTextField jt;
JTextField jt1,jt2,jt3,jt4;
public SelectPanel(){
JLabel jl = new JLabel("請(qǐng)輸入學(xué)號(hào):",SwingConstants.CENTER);
jt = new JTextField();
jb = new JButton("確定");
JPanel jp1 = new JPanel(new GridLayout(1,3));
jp1.add(jl);
jp1.add(jt);
jp1.add(jb);
JLabel j1,j2,j3,j4;
j1 = new JLabel("學(xué)號(hào):",SwingConstants.CENTER);
j2 = new JLabel("姓名:",SwingConstants.CENTER);
j3 = new JLabel("性別:",SwingConstants.CENTER);
j4 = new JLabel("年齡:",SwingConstants.CENTER);
jt1 = new JTextField(6);
jt1.setEditable(false);
jt2 = new JTextField(6);
jt2.setEditable(false);
jt3 = new JTextField(6);
jt3.setEditable(false);
jt4 = new JTextField(6);
jt4.setEditable(false);
JPanel jp2 = new JPanel(new BorderLayout());
JPanel jp3 = new JPanel(new GridLayout(4,2));
jp2.add(new JLabel(""),BorderLayout.NORTH);
jp3.add(j1);
jp3.add(jt1);
jp3.add(j2);
jp3.add(jt2);
jp3.add(j3);
jp3.add(jt3);
jp3.add(j4);
jp3.add(jt4);
jp2.add(jp3);
this.setLayout(new BorderLayout());
add(jp1,BorderLayout.NORTH);
add(jp2);
jb.addActionListener(this);
}
public void actionPerformed(ActionEvent e){
if(e.getSource() == jb){
String stuNo = jt.getText().trim();
Student s = new Student();
boolean b = true;
try{
b = s.selectByStuNo(stuNo);
}
catch(Exception ex){
System.out.println("查詢學(xué)生信息遇到異常!");
}
if(b){
jt1.setText(s.getStuNo());
jt2.setText(s.getName());
jt3.setText(s.getGender());
int a = s.getAge();
Integer i = new Integer(a);
jt4.setText(i.toString());
}
else{
JOptionPane.showMessageDialog(null, "無(wú)此學(xué)生!");
}
}
}
}
第五個(gè)：
import javax.swing.JFrame;
public class SelectTest {
public static void main(String [] args){
JFrame f = new JFrame("查詢學(xué)生信息");
SelectPanel p = new SelectPanel();
f.add(p);
f.setSize(400,300);
f.setLocation(300,250);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
第六個(gè)：
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
public class Student {
String stuNo;
String name;
String gender;
int age;
public Student(){}
public Student(String stuNo,String name,String gender, int age){
this.stuNo = stuNo;
this.name = name;
this.gender = gender;
this.age = age;
}
public String getStuNo(){
return stuNo;
}
public void setStuNo(String stuNo){
this.stuNo = stuNo;
}
public String getName(){
return name;
}
public void setName(String name){
this.name = name;
}
public String getGender(){
return gender;
}
public void setGender(String gender){
this.gender = gender;
}
public int getAge(){
return age;
}
public void setAge(int age){
this.age = age;
}
public boolean insertStudent(){
boolean b = true;
try{
Connection con = MySQLConnection.getCon();
Statement statement = con.createStatement();
String sql = "insert into student values('" + stuNo + "','" + name +"','" + gender + "'," + age + ")";
sql = new String(sql.getBytes("gb2312"),"ISO8859_1");
statement.executeUpdate(sql);
con.close();
}
catch(Exception e){
b = false;
System.out.println("插入數(shù)據(jù)庫(kù)遇到異常！");
}
return b;
}
public boolean selectByStuNo(String stuNo)throws Exception{
boolean b = true;
Connection con = MySQLConnection.getCon();
Statement statement = con.createStatement();
String sql = "select * from student where stuNo =" + stuNo;
ResultSet rs = statement.executeQuery(sql);
if(rs != null rs.next()){
String no = rs.getString(1);
this.setStuNo(no);
String n = rs.getString(2);
n = new String(n.getBytes("ISO8859_1"),"gb2312");
this.setName(n);
String g = rs.getString(3);
g = new String (g.getBytes("ISO8859_1"),"gb2312");
this.setGender(g);
this.setAge(rs.getInt(4));
b = true;
}
rs.close();
statement.close();
con.close();
return b;
}
}
數(shù)據(jù)庫(kù)你自己弄吧，我沒(méi)時(shí)間弄了！初學(xué)得多動(dòng)手哦
我們有這個(gè)小組作業(yè)。
不過(guò)還沒(méi)寫出來(lái)。。
分了任務(wù)的。。。
慢慢寫好了。。。
用JD做吧。。既然你都列了這么多的條條框框，那你應(yīng)該曉得大體怎么構(gòu)建撒。。一個(gè)做有點(diǎn)工作量。不過(guò)感覺(jué)也不是不可能。。就像上學(xué)期做的JAVA記事本一樣。。。頭腦清醒。。多上百度。。哎。。就OK了。
importjava.text.SimpleDateFormat;\x0d\x0aimportjava.util.Date;\x0d\x0aimportjava.util.Scanner;\x0d\x0a\x0d\x0a/*********************************\x0d\x0a*停車場(chǎng)管理\x0d\x0a*authorzhang\x0d\x0a*2013-12-13\x0d\x0a********************************/\x0d\x0apublicclassCarStopManager{\x0d\x0a\x0d\x0apublicstaticvoidmain(String[]args){\x0d\x0aScannersc=newScanner(System.in);\x0d\x0a\x0d\x0aSystem.out.println("請(qǐng)入車牌號(hào):");\x0d\x0aStringcarno=sc.next();\x0d\x0aCarStopManagercarStopManager=newCarStopManager();\x0d\x0acarStopManager.setCarNo(carno);//設(shè)置車牌號(hào)\x0d\x0a\x0d\x0aSimpleDateFormatformat=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");\x0d\x0aStringsdate=format.format(newDate());\x0d\x0aSystem.out.println("當(dāng)前時(shí)間（入場(chǎng)時(shí)間）是:"+sdate);\x0d\x0a\x0d\x0aSystem.out.println("需要開(kāi)出車場(chǎng)嗎？yes/no:");\x0d\x0aStringyesno=sc.next();\x0d\x0a\x0d\x0aif(yesno.equals("yes")){\x0d\x0aStringedate=format.format(newDate());\x0d\x0aSystem.out.println("出場(chǎng)時(shí)間是:"+edate);\x0d\x0a//計(jì)算方法\x0d\x0acarManager(2,sdate,edate,carStopManager);\x0d\x0a}\x0d\x0a}\x0d\x0a/**\x0d\x0a*計(jì)算方法\x0d\x0a*/\x0d\x0apublicstaticvoidcarManager(inttype,StringstarTime,\x0d\x0aStringendTime,CarStopManagercarStopManager){\x0d\x0a\x0d\x0aif(type==1){//按月收費(fèi)\x0d\x0aSystem.out.println("如若沒(méi)有繳納月費(fèi)請(qǐng)繳納800元，如若繳納將不再提示!");\x0d\x0a}else{\x0d\x0a/**\x0d\x0a*一般不會(huì)有停車幾個(gè)月的吧？先不考慮停車幾年或者幾個(gè)月的\x0d\x0a*/\x0d\x0aStringsDay=starTime.substring(8,10);//入場(chǎng)日期（天）\x0d\x0aStringsHour=starTime.substring(11,13);//入場(chǎng)小時(shí)\x0d\x0aStringsMM=starTime.substring(14,16);//入場(chǎng)分鐘\x0d\x0a\x0d\x0aStringeDay=starTime.substring(8,10);//出場(chǎng)日期（天）\x0d\x0aStringeHour=endTime.substring(11,13);//出廠小時(shí)\x0d\x0aStringeMM=endTime.substring(14,16);//出廠分鐘\x0d\x0a\x0d\x0afloatmoney=0;//需繳納的費(fèi)用\x0d\x0aintshour=Integer.parseInt(sHour);\x0d\x0aintehour=Integer.parseInt(eHour);\x0d\x0aintsmm=Integer.parseInt(sMM);\x0d\x0aintemm=Integer.parseInt(eMM);\x0d\x0aintrehour=0;//停車幾個(gè)小時(shí)\x0d\x0a\x0d\x0aif(sDay.equals(eDay)){//同一天\x0d\x0a//當(dāng)天6點(diǎn)到20點(diǎn)之間\x0d\x0aif((shour=6shour
回答于?2022-12-14
lListStudent students = new ArrayListStudent();
BufferedReader br = new BufferedReader(new FileReader("D:\student.txt"));
String tmpStr = br.readLine();
while(tmpStr != null){
int firstIndex = tmpStr.indexOf(" ");
int secondIndex = tmpStr.indexOf(" ",firstIndex + 1);
int thirdIndex = tmpStr.indexOf(" ", secondIndex + 1);
int forthIndex = tmpStr.indexOf(" ", thirdIndex + 1);
Integer stuId = Integer.parseInt(tmpStr.substring(0,firstIndex));
String stuName = tmpStr.substring(firstIndex + 1,secondIndex);
Integer stuYW = Integer.parseInt(tmpStr.substring(secondIndex + 1,thirdIndex));
Integer stuSX = Integer.parseInt(tmpStr.substring(thirdIndex + 1,forthIndex));
Integer stuYY = Integer.parseInt(tmpStr.substring(forthIndex + 1));
Student student = new Student();
student.setStuId(stuId);
student.setStuName(stuName);
student.setStuYW(stuYW);
student.setStuSX(stuSX);
student.setStuYY(stuYY);
students.add(student);
tmpStr.readLine();
}
//創(chuàng)建一個(gè)學(xué)生實(shí)體類 封裝stuId stuName stuYW stuSx stuYY 這5個(gè)屬性。。。
//已經(jīng)幫你把數(shù)據(jù)拆分出來(lái) 并以Student 對(duì)象的形式放入集合中了 接下來(lái) 給分吧 哇咔咔
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重慶分公司
