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云代码 - java代码库

学生信息

2019-06-26 作者： 云代码会员举报

[java]代码库

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import java.awt.*;
import java.awt.event.*;
import java.io.*;
 
public class StudentInformation implements ActionListener {
Frame mainFrame;
Frame inputFrame;
Frame searchFrame;
TextArea stuInfo;
Label lb[] = new Label[9];
Label lb2[] = new Label[2];
TextField tf[] = new TextField[9];
TextField tf2[] = new TextField[2];
Button btn[] = new Button[3];
Button btn2[] = new Button[2];
Panel p1, p2, p3, p4;
IOOperation ioo;
Student stu;
Student student[] = new Student[100];
 
public StudentInformation() {
/**
* set mainframe
*/
mainFrame = new Frame("Student Information");
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
 
MenuItem item1 = new MenuItem("Record");
MenuItem item2 = new MenuItem("Search");
MenuItem item3 = new MenuItem("Modify");
MenuItem item4 = new MenuItem("Exit");
MenuItem item5 = new MenuItem("About");
item1.addActionListener(this);
item2.addActionListener(this);
item3.addActionListener(this);
item4.addActionListener(this);
item5.addActionListener(this);
 
Menu menu1 = new Menu("File");
menu1.add(item1);
menu1.add(item2);
menu1.add(item3);
menu1.addSeparator();
menu1.add(item4);
 
Menu menu2 = new Menu("Help");
menu2.add(item5);
 
MenuBar mb = new MenuBar();
mb.add(menu1);
mb.add(menu2);
mainFrame.setMenuBar(mb);
 
stuInfo = new TextArea();
stuInfo.setFont(new Font("serif", Font.PLAIN, 18));
mainFrame.add(stuInfo);
 
mainFrame.setSize(400, 250);
mainFrame.setLocation(200, 100);
mainFrame.setVisible(true);
 
/**
* set inputFrame which is used to record student information
*/
inputFrame = new Frame();
inputFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
inputFrame.setVisible(false);
}
});
 
p1 = new Panel(new GridLayout(9, 2));
p2 = new Panel();
String lbname[] = {"Code:", "Name:", "Sex:", "BirthPlace:",
"Class:", "Chinese:", "Math:", "English:", "TotalScore:"};
String btnname[] = {"Save", "Delete", " Exit "};
for(int i=0; i<9; i++) {
lb[i] = new Label(lbname[i]);
tf[i] = new TextField(15);
p1.add(lb[i]);
p1.add(tf[i]);
}
for(int i=0; i<3; i++) {
btn[i] = new Button(btnname[i]);
btn[i].addActionListener(this);
p2.add(btn[i]);
}
btn[2].setActionCommand("input");
inputFrame.add(p1, BorderLayout.CENTER);
inputFrame.add(p2, BorderLayout.SOUTH);
 
inputFrame.pack();
inputFrame.setLocationRelativeTo(mainFrame);
 
/**
* set searchFrame which is used to search student information
*/
searchFrame = new Frame("Search student");
searchFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
searchFrame.setVisible(false);
}
});
 
p3 = new Panel(new GridLayout(2, 2));
p4 = new Panel();
String lbname2[] = {"Code:", "Name:"};
String btnname2[] = {"Search", " Exit "};
for(int i=0; i<2; i++) {
lb2[i] = new Label(lbname2[i]);
tf2[i] = new TextField(15);
p3.add(lb2[i]);
p3.add(tf2[i]);
}
for(int i=0; i<2; i++) {
btn2[i] = new Button(btnname2[i]);
btn2[i].addActionListener(this);
p4.add(btn2[i]);
}
btn2[1].setActionCommand("search");
searchFrame.add(p3, BorderLayout.CENTER);
searchFrame.add(p4, BorderLayout.SOUTH);
 
searchFrame.pack();
searchFrame.setLocationRelativeTo(mainFrame);
 
/**
* IO operation object
*/
ioo = new IOOperation();
student = ioo.getAllStudent();
 
}
 
public void actionPerformed(ActionEvent e) {
/**
* MenuItem action
*/
if (e.getSource() instanceof MenuItem) {
MenuItem mi = (MenuItem) e.getSource();
if (mi.getLabel().equals("Record")) {
inputFrame.setTitle("Record");
for(int i=0; i<9; i++)
tf[i].setText("");
p2.remove(btn[1]);
btn[0].setActionCommand("input");
inputFrame.setVisible(true);
}
else if (mi.getLabel().equals("Search")) {
searchFrame.setVisible(true);
}
else if (mi.getLabel().equals("Modify")) {
inputFrame.setTitle("Modify");
if(stu != null) {
tf[0].setText(stu.getCode());
tf[1].setText(stu.getName());
tf[2].setText(stu.getSex());
tf[3].setText(stu.getBirthPlace());
tf[4].setText(stu.getStuClass());
tf[5].setText(stu.getChinese() + "");
tf[6].setText(stu.getMath() + "");
tf[7].setText(stu.getEnglish() + "");
tf[8].setText(stu.getTotalScore() + "");
}
p2.remove(btn[2]);
p2.add(btn[1]);
p2.add(btn[2]);
btn[0].setActionCommand("modify");
inputFrame.setVisible(true);
}
else if (mi.getLabel().equals("Exit"))
System.exit(0);
else if (mi.getLabel().equals("About")) {
final Dialog progInfo = new Dialog(mainFrame, "ProgInfo", true);
progInfo.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
progInfo.dispose();
}
});
progInfo.setLayout(new FlowLayout());
Label l = new Label("Student Information System");
progInfo.add(l);
progInfo.setSize(200, 80);
progInfo.setLocationRelativeTo(mainFrame);
progInfo.setVisible(true);
}
}
/**
* Button action
*/
else {
Button btn = (Button)e.getSource();
if(btn.getLabel().equals("Save")) {
if(!tf[0].getText().equals("") &&
!tf[1].getText().equals("") &&
!tf[2].getText().equals("") &&
!tf[3].getText().equals("") &&
!tf[4].getText().equals("") &&
!tf[5].getText().equals("") &&
!tf[6].getText().equals("") &&
!tf[7].getText().equals("") &&
!tf[8].getText().equals("")) {
Student s = new Student(tf[0].getText(), tf[1].getText(),
tf[2].getText(), tf[3].getText(), tf[4].getText(),
Integer.parseInt(tf[5].getText()),
Integer.parseInt(tf[6].getText()),
Integer.parseInt(tf[7].getText()),
Integer.parseInt(tf[8].getText()));
if(btn.getActionCommand().equals("input")) {
for(int i=0; i<student.length; i++) {
if(student[i] == null) {
student[i] = s;
break;
}
}
ioo.write(student);
}
else {
for(int i=0; i<student.length; i++) {
if(student[i].equals(stu)) {
student[i] = s;
break;
}
}
ioo.write(student);
}
}
inputFrame.setVisible(false);
stuInfo.setText("");
}
else if(btn.getLabel().equals("Delete")) {
int index = 200;
if(stu != null) {
for(int i=0; i<student.length; i++) {
if(student[i]!=null && student[i].equals(stu)) {
index = i;
if(i != student.length-1)
student[i] = student[i+1];
else
student[i] = null;
}
if(i==index && student[i+1]==null)
break;
else if(i>index && i<student.length-1) {
student[i] = student[i+1];
if(i == student.length - 1)
student[i] = null;
}
}
ioo.write(student);
}
stu = null;
inputFrame.setVisible(false);
stuInfo.setText("");
/*for(int i=0; i<student.length; i++) {
if(student[i]!=null)
System.out.println(i + " " + student[i].getCode());
}*/
}
else if(btn.getLabel().equals("Search")) {
stu = null;
if(!tf2[0].getText().equals("") ||
!tf2[1].getText().equals("")) {
String condition = "";
if(!tf2[0].getText().equals("")) {
condition = tf2[0].getText();
}
else
condition = tf2[1].getText();
for(int i=0; i<student.length; i++) {
if (student[i] != null) {
if (student[i].getCode().equals(condition) ||
student[i].getName().equals(condition)) {
stu = student[i];
break;
}
}
}
}
if(stu != null) {
stuInfo.setText("Code: " + stu.getCode() + "\n" +
"Name: " + stu.getName() + "\n" +
"Sex: " + stu.getSex() + "\n" +
"BirthPlace: " + stu.getBirthPlace() + "\n" +
"Class: " + stu.getStuClass() + "\n" +
"Chinese: " + stu.getChinese() + "\n" +
"Math: " + stu.getMath() + "\n" +
"English: " + stu.getEnglish() + "\n" +
"TotalScore: " + stu.getTotalScore());
}
searchFrame.setVisible(false);
}
else if(btn.getLabel().equals(" Exit "))
if(btn.getActionCommand().equals("input"))
inputFrame.setVisible(false);
else
searchFrame.setVisible(false);
}
}
 
public static void main(String[] args) {
new StudentInformation();
}
}
 
/**
* class which is used to store student information
*/
class Student implements Serializable {
private String code;
private String name;
private String sex;
private String birthPlace;
private String stuClass;
private int Chinese;
private int Math;
private int English;
private int totalScore;
 
public Student(String code, String name, String sex, String birthPlace,
String stuClass, int chinese, int math, int english, int totalScore) {
super();
this.code = code;
this.name = name;
this.sex = sex;
this.birthPlace = birthPlace;
this.stuClass = stuClass;
Chinese = chinese;
Math = math;
English = english;
this.totalScore = totalScore;
}
 
public String getBirthPlace() {
return birthPlace;
}
 
public int getChinese() {
return Chinese;
}
 
public String getCode() {
return code;
}
 
public int getEnglish() {
return English;
}
 
public int getMath() {
return Math;
}
 
public String getName() {
return name;
}
 
public String getSex() {
return sex;
}
 
public String getStuClass() {
return stuClass;
}
 
public int getTotalScore() {
return totalScore;
}
 
public boolean equals(Object obj) {
if(obj != null && (obj instanceof Student))
if(this.getCode().equals(((Student)obj).getCode()) &&
this.getName().equals(((Student)obj).getName()) &&
this.getSex().equals(((Student)obj).getSex()) &&
this.getBirthPlace().equals(((Student)obj).getBirthPlace()) &&
this.getStuClass().equals(((Student)obj).getStuClass()) &&
this.getChinese() == ((Student)obj).getChinese() &&
this.getMath() == ((Student)obj).getMath() &&
this.getEnglish() == ((Student)obj).getEnglish() &&
this.getTotalScore() == ((Student)obj).getTotalScore())
return true;
return false;
}
}
 
/**
* class which is used to do I/O operation
*/
class IOOperation {
private File file = new File("C:\\stuinfo.txt");
 
public IOOperation() {
try {
if(!file.exists())
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
 
/**
* write to file
*/
public void write(Student[] s) {
try {
FileOutputStream fos = new FileOutputStream(file);
ObjectOutputStream objOut = new ObjectOutputStream(fos);
objOut.writeObject(s);
objOut.close();
fos.close();
} catch(Exception e) {
e.printStackTrace();
}
}
 
/**
* read all student information from file
*/
public Student[] getAllStudent() {
Student ss[] = new Student[100];
try {
if (file.length() > 0) {
FileInputStream fis = new FileInputStream(file);
ObjectInputStream ois = new ObjectInputStream(fis);
ss = (Student[]) ois.readObject();
ois.close();
fis.close();
}
} catch(Exception e) {
e.printStackTrace();
}
return ss;
}
}


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