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public class RandomUtils {
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public static String randomId(){
Random random = new Random();
StringBuilder sb = new StringBuilder();
for (int i = 0; i 6; i++) {
sb.append(random.nextInt(10));
}
return sb.toString();
}
public static int randomIntId(){
Random random = new Random();
StringBuilder sb = new StringBuilder();
for (int i = 0; i 6; i++) {
sb.append(random.nextInt(10));
}
return Integer.parseInt(sb.toString());
}
public static String randomName(){
String[] name1 = {"赵","钱","孙","李","周","吴","郑","王","张","刘"};
String[] name2 = {"一","二","三","四","五","六","七","八","九","十"};
Random random = new Random();
StringBuilder sb = new StringBuilder();
sb.append(name1[random.nextInt(10)]);
sb.append(name2[random.nextInt(10)]);
sb.append(name2[random.nextInt(10)]);
return sb.toString();
}
public static String randomSex(){
Random random = new Random();
return random.nextInt(4)/2==0?"男":"女";
}
public static int randomAge(int min, int max){
Random random = new Random();
return random.nextInt(min) + max-min;
}
public static int randomScore(){
Random random = new Random();
return (int)(random.nextDouble()*100%100);
}
public static String randomAddress(){
String[] address1 = {"商业","红叶","安康","河南","长海","黄河","桐柏","科学","瑞达","花园"};
String[] address2 = {"东","南","西","北","中"};
String[] address3 = {"街","路","大道","巷"};
Random random = new Random();
StringBuilder sb = new StringBuilder();
sb.append(address1[random.nextInt(10)]);
sb.append(address2[random.nextInt(5)]);
sb.append(address3[random.nextInt(4)]);
sb.append(random.nextInt(1000)+1);
sb.append("号");
return sb.toString();
}
}
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.tree.DefaultMutableTreeNode;
import java.awt.*;
import java.util.*;
import java.util.List;
public class StudentManage extends JFrame{
public final static String[] CH_NUM = {"一","二","三","四","五","六","七","八","九","十"};
public final static String ROOT = "班级管理";
public final static int GRADE_NUM = 3;
public final static int CLASS_NUM = 3;
private MapString, ListStudent classes;
public StudentManage() {
setTitle("学生管理系统");
setSize(300, 300);
setLayout(new BorderLayout());
if(classes == null) classes = new HashMap();
DefaultMutableTreeNode top = new DefaultMutableTreeNode(ROOT);
DefaultMutableTreeNode[] gradeNodes = new DefaultMutableTreeNode[GRADE_NUM];
for (int i = 0; i GRADE_NUM; i++) {
gradeNodes[i] = new DefaultMutableTreeNode(CH_NUM[i] + "年级");
for (int j = 0; j CLASS_NUM; j++) {
gradeNodes[i].add(new DefaultMutableTreeNode(CH_NUM[j] + "班"));
}
top.add(gradeNodes[i]);
}
final JTree tree = new JTree(top);
String title[] = {"ID","姓名","性别","年龄","地址"};
final DefaultTableModel model = new DefaultTableModel(title, 0);
JTable table=new JTable(model);
tree.addTreeSelectionListener(new TreeSelectionListener() {
@Override
public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree .getLastSelectedPathComponent();
if (node == null) return;
Object object = node.getUserObject();
if (node.isLeaf()) {
ListStudent stdList = classes.get(getFullPath(node));
Object[][] data = new Object[stdList.size()][5];
for (int i = 0; i stdList.size(); i++) {
data[i][0] = stdList.get(i).getId();
data[i][1] = stdList.get(i).getName();
data[i][2] = stdList.get(i).getSex();
data[i][3] = stdList.get(i).getAge();
data[i][4] = stdList.get(i).getAddress();
}
while(model.getRowCount()0){
model.removeRow(model.getRowCount()-1);
}
for (int i = 0; i stdList.size(); i++) {
model.addRow(data[i]);
}
model.fireTableDataChanged();
}
}
});
add(tree, BorderLayout.WEST);
add(new JScrollPane(table), BorderLayout.CENTER);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private String getFullPath(DefaultMutableTreeNode defaultMutableTreeNode){
StringBuilder sb = new StringBuilder();
Object[] objs = defaultMutableTreeNode.getUserObjectPath();
for (int i = 0; i objs.length; i++) {
sb.append(objs[i]);
}
return sb.toString().replace(ROOT,"");
}
public void init(){
for (int i = 0; i GRADE_NUM; i++) {
for (int j = 0; j CLASS_NUM; j++) {
int n = new Random().nextInt(30)+1;
ListStudent stdList = new ArrayList(n);
for (int k = 0; k n; k++) {
stdList.add(new Student(RandomUtils.randomIntId(),RandomUtils.randomName(),RandomUtils.randomSex(),
RandomUtils.randomAge(6,12),RandomUtils.randomAddress()));
}
classes.put(CH_NUM[i] + "年级"+ CH_NUM[j] +"班", stdList);
}
}
}
public static void main(String[] args) {
StudentManage studentManage = new StudentManage();
studentManage.init();
}
}
class Student {
private int id;
private String name;
private String sex;
private int age;
private String address;
public Student(int id, String name, String sex, int age, String address) {
this.id = id;
this.name = name;
this.sex = sex;
this.age = age;
this.address = address;
}
public Student() {
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public String getSex() {
return sex;
}
public int getAge() {
return age;
}
public String getAddress() {
return address;
}
@Override
public String toString() {
return "Student{" +
"id=" + id +
", name='" + name + '\'' +
", sex='" + sex + '\'' +
", age=" + age +
", address='" + address + '\'' +
'}';
}
}
分三个包，自己建个包，导进去就ok了，数据库是access的。
package 登录;
import java.awt.EventQueue;
public class Cilent {
private JFrame frame;
private JTextField textField;
private JPasswordField passwordField;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Cilent window = new Cilent();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Cilent() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setTitle("登陆界面");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
frame.setResizable(false);
JLabel lblNewLabel = new JLabel("用户名");
lblNewLabel.setBounds(38, 43, 80, 34);
frame.getContentPane().add(lblNewLabel);
textField = new JTextField();
textField.setBounds(155, 42, 227, 37);
frame.getContentPane().add(textField);
textField.setColumns(10);
JLabel label = new JLabel("密 码");
label.setBounds(38, 115, 80, 34);
frame.getContentPane().add(label);
passwordField = new JPasswordField();
passwordField.setBounds(155, 115, 227, 37);
frame.getContentPane().add(passwordField);
JButton btnNewButton = new JButton("登 录");
btnNewButton.setBounds(60, 187, 115, 34);
frame.getContentPane().add(btnNewButton);
btnNewButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
UserCheck UC=new UserCheck(textField.getText(),String.valueOf(passwordField.getPassword()));
if(UC.getI()!=0) //有此用户
{
frame.setVisible(false);
}
else
{
textField.setText("");
passwordField.setText("");
}
}
});
JButton button = new JButton("取 消");
button.setBounds(242, 187, 115, 34);
frame.getContentPane().add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
textField.setText("");
passwordField.setText("");
}
});
}
}
/*****************************************************************/
package 登录;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import 操作处理.UsersCL;
/**@author 20111024
* 检测登录的用户在数据库中有无，若没有，则提示没有此用户，
* 若有，则判断级别：普通用户还是管理员。
*/
public class UserCheck {
private int i=0; //用户级别:0不是用户、1是管理员、2是普通用户
UserCheck(String name ,String password)
{
String jdriver="sun.jdbc.odbc.JdbcOdbcDriver";
String connectDB="jdbc:odbc:Students";
Statement stmt=null;
ResultSet rs=null;
Connection con=null;
try {
Class.forName(jdriver);
con=DriverManager.getConnection(connectDB);
stmt=con.createStatement();
String query="select * from users where name='"+name+"' and passwd='"+password+"'";
rs=stmt.executeQuery(query);
if(rs.next())
{
//数据库中有此用户，访问成功
i=Integer.parseInt(rs.getString(3));
UsersCL UL=new UsersCL(i);
}
else
{
i=0; //没有用户是默认是0级
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public int getI() {
return i;
}
}
/********************************************************************************************/
package 操作处理;
import java.awt.EventQueue;
public class UsersCL implements ActionListener{
private JFrame frame;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private JTextField textField_3;
private int i=0;
private JLabel label_3;
private JTextField textField_4;
public UsersCL(int i) {
this.i=i;
frame = new JFrame();
frame.setTitle("用户处理界面");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
frame.setResizable(false);
frame.setVisible(true);
JLabel lblNewLabel = new JLabel("学 号");
lblNewLabel.setBounds(24, 32, 74, 29);
frame.getContentPane().add(lblNewLabel);
JLabel label = new JLabel("姓 名");
label.setBounds(24, 71, 74, 29);
frame.getContentPane().add(label);
JLabel label_1 = new JLabel("年 龄");
label_1.setBounds(24, 110, 74, 29);
frame.getContentPane().add(label_1);
label_3 = new JLabel("性 别");
label_3.setBounds(24, 149, 74, 29);
frame.getContentPane().add(label_3);
JLabel label_2 = new JLabel("状 态");
label_2.setBounds(24, 195, 74, 29);
frame.getContentPane().add(label_2);
textField = new JTextField();
textField.setBounds(101, 34, 113, 25);
frame.getContentPane().add(textField);
textField.setColumns(10);
textField_1 = new JTextField();
textField_1.setColumns(10);
textField_1.setBounds(101, 73, 113, 25);
frame.getContentPane().add(textField_1);
textField_2 = new JTextField();
textField_2.setColumns(10);
textField_2.setBounds(101, 112, 113, 25);
frame.getContentPane().add(textField_2);
textField_3 = new JTextField();
textField_3.setEditable(false);
textField_3.setColumns(10);
textField_3.setBounds(101, 199, 288, 25);
frame.getContentPane().add(textField_3);
textField_4 = new JTextField();
textField_4.setColumns(10);
textField_4.setBounds(101, 149, 113, 25);
frame.getContentPane().add(textField_4);
if(1==i)
{
JButton btnNewButton = new JButton("追 加");
btnNewButton.setBounds(276, 41, 113, 29);
frame.getContentPane().add(btnNewButton);
btnNewButton.addActionListener(this);
btnNewButton.setActionCommand("追加");
JButton button_1 = new JButton("删 除");
button_1.setBounds(276, 145, 113, 29);
frame.getContentPane().add(button_1);
button_1.addActionListener(this);
button_1.setActionCommand("删除");
}
JButton button = new JButton("查 询");
button.setBounds(276, 91, 113, 29);
frame.getContentPane().add(button);
button.addActionListener(this);
button.setActionCommand("查询");
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String name,age,sex,query=null;
int num,age1,count=0;
num=Integer.parseInt(textField.getText());
name=textField_1.getText();
age1=Integer.parseInt(textField_2.getText());
sex=textField_4.getText();
if(e.getActionCommand().equals("追加"))
{
query="insert into students values("+num+","+"'"+name+"',"+age1+",'"+sex+"');";
count=1;
}
else if(e.getActionCommand().equals("查询"))
{
query="select * from students where XSB="+num+";";
count=2;
}
else if(e.getActionCommand().equals("删除"))
{
query="delete from students where XSB="+num+" and name="+"'"+name+"'";
count=3;
}
Statement stmt=null;
ResultSet rs=null;
Connection con=null;
String jdriver="sun.jdbc.odbc.JdbcOdbcDriver";
String connectDB="jdbc:odbc:Students";
String query1=null;
try {
Class.forName(jdriver);
con=DriverManager.getConnection(connectDB);
stmt=con.createStatement();
if(count==1)
{
query1="select * from students where XSB="+num+";";
rs=stmt.executeQuery(query1);
if(rs.next())
textField_3.setText("已经由此记录，不能追加！");
else
{
stmt.executeUpdate(query);
textField_3.setText("已经追加完成！");
}
}
else if(2==count)
{
stmt.executeQuery(query);
rs=stmt.executeQuery(query);
if(rs.next())
{
textField_3.setText("已查找到此记录！");
}
else
{
textField_3.setText("没有此记录，可以追加！");
}
}
else if(3==count)
{
query1="select * from students where XSB="+num+" and name="+"'"+name+"'";
rs=stmt.executeQuery(query1);
if(rs.next())
{
stmt.executeUpdate(query);
textField_3.setText("已删除此记录！");
}
else
textField_3.setText("无此记录！");
}
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
finally{
//关闭资源
if(stmt!=null){
try {
stmt.close();
} catch (Exception e2) {
// TODO: handle exception
}
stmt=null;
}
if(con!=null){
try {
con.close();
} catch (Exception e2) {
// TODO: handle exception
}
con=null;
}
}
}
}
public class Matriculate {
private int score=400;
public int isMatriculate(Student stu){
if (stu.getIntgretResult()=score||(stu.getIntgretResult()=300stu.getSports()=90)) {
return 1;
}else {
return 0;
}
}
public static void main(String[] args) throws Exception {
Student stu1=new Student("zhangsan",1);
stu1.setIntgretResult(400);
Student stu2=new Student("lisi",2);
stu2.setSports(85);
stu2.setIntgretResult(356);
Matriculate m=new Matriculate();
int c1=m.isMatriculate(stu1);
if (c10) {
System.out.println("id:"+stu1.getId()+"\tname:"+stu1.getName()
+"\tIntgretResult:"+stu1.getIntgretResult()+"\tsports"+stu1.getSports());
System.out.println("被录取");
}
int c2=m.isMatriculate(stu2);
if (c20) {
System.out.println("id:"+stu2.getId()+"\tname:"+stu2.getName()
+"\tIntgretResult:"+stu2.getIntgretResult()+"\tsports"+stu2.getSports());
System.out.println("被录取");
}
}
}
class School{
public School(){}
public School(String schoolname, double scoreLine) {
this.schoolname = schoolname;
this.scoreLine = scoreLine;
}
private String schoolname;
private double scoreLine;
public String getSchoolname() {
return schoolname;
}
public double getScoreLine() {
return scoreLine;
}
}
class Student{
public Student(){}
public Student(String name, int id) {
this.name = name;
this.id = id;
}
private String name;
private int id;
private double intgretResult;
private int sports;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public double getIntgretResult() {
return intgretResult;
}
public void setIntgretResult(double intgretResult) {
this.intgretResult = intgretResult;
}
public int getSports() {
return sports;
}
public void setSports(int sports) {
this.sports = sports;
}
}
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();
}
//创建一个学生实体类 封装stuId stuName stuYW stuSx stuYY 这5个属性。。。
//已经帮你把数据拆分出来 并以Student 对象的形式放入集合中了 接下来 给分吧 哇咔咔