这个写的……太……羞耻了……
本来以为能写的很好的……图形界面什么的……啊啊啊好难……
写一半写不下去了……然后就什么功能都没有……
1 package com.wenr.dao;
2
3 import java.sql.Connection;
4 import java.sql.PreparedStatement;
5 import java.sql.ResultSet;
6 import java.sql.SQLException;
7 import java.util.ArrayList;
8
9 import com.wenr.model.Course;
10 import com.wenr.model.Student;
11 import com.wenr.util.DBUtil;
12
13 public class CourseDao {
14 public ArrayList<Student> getStudent(Connection con, Course course) {
15 ArrayList<Student> student = new ArrayList<>();
16 String sql = "SELECT stu.sid,stu.sname,stuco.score FROM stu,co,stuco "
17 + "WHERE stu.sid=stuco.sid AND co.cid=stuco.cid AND co.cname=?";
18
19 PreparedStatement pstmt = null;
20 try {
21 pstmt = con.prepareStatement(sql);
22 pstmt.setString(1, course.getName());
23 } catch (SQLException e) {
24 e.printStackTrace();
25 }
26
27 ResultSet resultSet = null;
28 try {
29 resultSet = pstmt.executeQuery();
30 while (resultSet.next()) {
31 student.add(new Student(resultSet.getString(1), resultSet.getString(2), resultSet.getDouble(3)));
32 }
33 } catch (SQLException e) {
34 e.printStackTrace();
35 }
36
37 return student;
38 }
39
40 public static void main(String[] args) throws Exception {
41 DBUtil dbUtil = new DBUtil();
42 CourseDao dao = new CourseDao();
43 Connection con = dbUtil.getCon();
44 Course course = new Course();
45 course.setName("中国现代史纲要");
46 ArrayList<Student> student = dao.getStudent(con, course);
47 for (Student s: student) {
48 System.out.println(s.getSid() + " " + s.getSname() + " " + s.getScore());
49 }
50 }
51
52 }
/StudentManager/src/com/wenr/dao/CourseDao.java
1 package com.wenr.dao;
2
3 import java.sql.Connection;
4 import java.sql.PreparedStatement;
5 import java.sql.ResultSet;
6 import java.sql.SQLException;
7 import java.util.ArrayList;
8
9 import com.wenr.model.Course;
10 import com.wenr.model.Student;
11 import com.wenr.util.DBUtil;
12
13 public class CourseDao {
14 public ArrayList<Student> getStudent(Connection con, Course course) {
15 ArrayList<Student> student = new ArrayList<>();
16 String sql = "SELECT stu.sid,stu.sname,stuco.score FROM stu,co,stuco "
17 + "WHERE stu.sid=stuco.sid AND co.cid=stuco.cid AND co.cname=?";
18
19 PreparedStatement pstmt = null;
20 try {
21 pstmt = con.prepareStatement(sql);
22 pstmt.setString(1, course.getName());
23 } catch (SQLException e) {
24 e.printStackTrace();
25 }
26
27 ResultSet resultSet = null;
28 try {
29 resultSet = pstmt.executeQuery();
30 while (resultSet.next()) {
31 student.add(new Student(resultSet.getString(1), resultSet.getString(2), resultSet.getDouble(3)));
32 }
33 } catch (SQLException e) {
34 e.printStackTrace();
35 }
36
37 return student;
38 }
39
40 public static void main(String[] args) throws Exception {
41 DBUtil dbUtil = new DBUtil();
42 CourseDao dao = new CourseDao();
43 Connection con = dbUtil.getCon();
44 Course course = new Course();
45 course.setName("中国现代史纲要");
46 ArrayList<Student> student = dao.getStudent(con, course);
47 for (Student s: student) {
48 System.out.println(s.getSid() + " " + s.getSname() + " " + s.getScore());
49 }
50 }
51
52 }
/StudentManager/src/com/wenr/dao/StudentDao.java
1 package com.wenr.model;
2 /*
3 CREATE TABLE co (
4 cid int PRIMARY KEY auto_increment,
5 cname varchar(20) NOT NULL
6 );
7 */
8 public class Course {
9 private int id;
10 private String name;
11 private double score;
12
13 public Course(String name) {
14 super();
15 this.name = name;
16 }
17 public Course() {
18 super();
19 }
20 public Course(int id, String name, double score) {
21 super();
22 this.id = id;
23 this.name = name;
24 this.score = score;
25 }
26 public int getId() {
27 return id;
28 }
29 public void setId(int id) {
30 this.id = id;
31 }
32 public String getName() {
33 return name;
34 }
35 public void setName(String name) {
36 this.name = name;
37 }
38 public double getScore() {
39 return score;
40 }
41 public void setScore(double score) {
42 this.score = score;
43 }
44 }
/StudentManager/src/com/wenr/model/Course.java
1 package com.wenr.model;
2 /*
3 create table stu (
4 sid char(10) PRIMARY KEY,
5 sname varchar(20) NOT NULL,
6 spwd varchar(20) NOT NULL
7 );
8 */
9 public class Student {
10 private String sid;
11 private String sname;
12 private String spwd;
13 private double score;
14
15 public Student(String sid, String sname, double score) {
16 super();
17 this.sid = sid;
18 this.sname = sname;
19 this.score = score;
20 }
21
22 public Student(String sname) {
23 super();
24 this.sname = sname;
25 }
26 public Student(String sid, String spwd) {
27 super();
28 this.sid = sid;
29 this.spwd = spwd;
30 }
31 public Student() {
32 super();
33 }
34 public String getSid() {
35 return sid;
36 }
37 public void setSid(String sid) {
38 this.sid = sid;
39 }
40 public String getSname() {
41 return sname;
42 }
43 public void setSname(String sname) {
44 this.sname = sname;
45 }
46 public String getSpwd() {
47 return spwd;
48 }
49 public void setSpwd(String spwd) {
50 this.spwd = spwd;
51 }
52 public double getScore() {
53 return score;
54 }
55 public void setScore(double score) {
56 this.score = score;
57 }
58 }
/StudentManager/src/com/wenr/model/Student.java
1 package com.wenr.util;
2
3 import java.sql.Connection;
4 import java.sql.DriverManager;
5 import java.sql.SQLException;
6
7 public class DBUtil {
8 private String dbUrl = "jdbc:mysql://localhost:3306/db_student";
9 private String dbUserName = "root";
10 private String dbPassword = "123456";
11 private String jdbcName = "com.mysql.jdbc.Driver";
12 /**
13 * 获取数据库连接
14 * @return
15 * @throws Exception
16 */
17 public Connection getCon() throws Exception {
18 Class.forName(jdbcName);
19 Connection con = DriverManager.getConnection(dbUrl, dbUserName, dbPassword);
20 return con;
21 }
22 /**
23 * 关闭数据库连接
24 * @param con
25 * @throws SQLException
26 */
27 public void closeCon(Connection con) throws SQLException {
28 if (con != null)
29 con.close();
30 }
31
32 public static void main(String[] args) {
33 DBUtil dbUtil = new DBUtil();
34 try {
35 dbUtil.getCon();
36 System.out.println("连接成功");
37 } catch (Exception e) {
38 System.out.println("连接失败");
39 e.printStackTrace();
40 }
41 }
42
43 }
/StudentManager/src/com/wenr/util/DBUtil.java
1 package com.wenr.util;
2
3 public class StringUtil {
4 public static Boolean isEmpty(String str) {
5 if ("".equals(str) || str == null) return true;
6 return false;
7 }
8 }
/StudentManager/src/com/wenr/util/StringUtil.java
1 package com.wenr.view;
2
3 import java.awt.EventQueue;
4
5 import javax.swing.JFrame;
6 import javax.swing.JPanel;
7 import javax.swing.border.EmptyBorder;
8
9 import com.wenr.dao.StudentDao;
10 import com.wenr.model.Student;
11 import com.wenr.util.DBUtil;
12 import com.wenr.util.StringUtil;
13
14 import javax.swing.JLabel;
15 import javax.swing.JOptionPane;
16 import javax.swing.JTextField;
17 import javax.swing.JButton;
18 import java.awt.Font;
19 import java.awt.Toolkit;
20 import javax.swing.ImageIcon;
21 import javax.swing.SwingConstants;
22 import javax.swing.UIManager;
23
24 import java.awt.Color;
25 import java.awt.event.ActionListener;
26 import java.sql.Connection;
27 import java.sql.SQLException;
28 import java.util.Enumeration;
29 import java.awt.event.ActionEvent;
30 import javax.swing.JPasswordField;
31
32 @SuppressWarnings("serial")
33 public class Logon extends JFrame {
34
35 private JPanel contentPane;
36 private JTextField tfID;
37 private JPasswordField passwordField;
38
39 DBUtil dbUtil = new DBUtil();
40 StudentDao studentDao = new StudentDao();
41
42 public static void main(String[] args) {
43 EventQueue.invokeLater(new Runnable() {
44 public void run() {
45 try {
46 Logon frame = new Logon();
47 frame.setVisible(true);
48 } catch (Exception e) {
49 e.printStackTrace();
50 }
51 }
52 });
53 }
54
55 public Logon() {
56 setResizable(false);
57 setBackground(Color.LIGHT_GRAY);
58
59 // 改变默认字体
60 Font font = new Font("Dialog", Font.PLAIN, 12);
61 Enumeration<Object> keys = UIManager.getDefaults().keys();
62 while (keys.hasMoreElements()) {
63 Object key = keys.nextElement();
64 Object value = UIManager.get(key);
65 if (value instanceof javax.swing.plaf.FontUIResource) {
66 UIManager.put(key, font);
67 }
68 }
69
70 setIconImage(Toolkit.getDefaultToolkit().getImage(".\\resources\\icon.png"));
71 setTitle("学生成绩管理系统");
72 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
73 setBounds(500, 200, 510, 358);
74 contentPane = new JPanel();
75 contentPane.setBackground(new Color(135, 206, 235));
76 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
77 setContentPane(contentPane);
78 contentPane.setLayout(null);
79
80 JLabel label = new JLabel("学生成绩管理系统");
81 label.setIcon(new ImageIcon(".\\resources\\icon_student.png"));
82 label.setFont(new Font("黑体", Font.BOLD, 20));
83 label.setBounds(124, 45, 259, 38);
84 contentPane.add(label);
85
86 JLabel label_1 = new JLabel("账号");
87 label_1.setHorizontalAlignment(SwingConstants.RIGHT);
88 label_1.setIcon(new ImageIcon(".\\resources\\icon_users.png"));
89 label_1.setBounds(119, 138, 66, 21);
90 contentPane.add(label_1);
91
92 JLabel label_2 = new JLabel("密码");
93 label_2.setHorizontalAlignment(SwingConstants.RIGHT);
94 label_2.setIcon(new ImageIcon(".\\resources\\icon_password.png"));
95 label_2.setBounds(119, 179, 66, 21);
96 contentPane.add(label_2);
97
98 tfID = new JTextField();
99 tfID.setBounds(195, 138, 146, 21);
100 contentPane.add(tfID);
101 tfID.setColumns(10);
102
103 JButton jbStuLogon = new JButton("学生登录");
104 jbStuLogon.setIcon(new ImageIcon(".\\resources\\icon_stu.png"));
105 jbStuLogon.addActionListener(new ActionListener() {
106 public void actionPerformed(ActionEvent e) {
107 String id = tfID.getText();
108 String pwd = new String(passwordField.getPassword());
109 if (StringUtil.isEmpty(id)) {
110 JOptionPane.showMessageDialog(null, "账号不能为空！");
111 return ;
112 }
113 if (StringUtil.isEmpty(pwd)) {
114 JOptionPane.showMessageDialog(null, "密码不能为空！");
115 return ;
116 }
117 //System.out.println(id + "+" + pwd);
118 Student student = new Student(id, pwd);
119 Connection con = null;
120 Student resultStudent = null;
121 try {
122 con = dbUtil.getCon();
123 resultStudent = studentDao.logon(con, student);
124 if (resultStudent == null) {
125 JOptionPane.showMessageDialog(null, "账号或密码错误！");
126 } else {
127 dispose();
128 StudentView studentView = new StudentView(student);
129 studentView.setVisible(true);
130 }
131 } catch (Exception e1) {
132 System.out.println("登录失败！");
133 e1.printStackTrace();
134 } finally {
135 if (con != null) {
136 try {
137 con.close();
138 } catch (SQLException e1) {
139 e1.printStackTrace();
140 }
141 }
142 }
143
144 }
145 });
146 jbStuLogon.setBounds(82, 241, 135, 23);
147 contentPane.add(jbStuLogon);
148
149 JButton jbAdminLogon = new JButton("管理员登录");
150 jbAdminLogon.setIcon(new ImageIcon(".\\resources\\icon_admin.png"));
151 jbAdminLogon.addActionListener(new ActionListener() {
152 public void actionPerformed(ActionEvent e) {
153 String id = tfID.getText();
154 String pwd = new String(passwordField.getPassword());
155 if (StringUtil.isEmpty(id)) {
156 JOptionPane.showMessageDialog(null, "账号不能为空！");
157 return ;
158 }
159 if (StringUtil.isEmpty(pwd)) {
160 JOptionPane.showMessageDialog(null, "密码不能为空！");
161 return ;
162 }
163 if ("admin".equals(id) && "nimda".equals(pwd)) {
164 new AdminView().setVisible(true);
165 dispose();
166 } else {
167 JOptionPane.showMessageDialog(null, "用户名或密码错误！");
168 }
169 }
170 });
171
172 jbAdminLogon.setBounds(270, 241, 135, 23);
173 contentPane.add(jbAdminLogon);
174
175 passwordField = new JPasswordField();
176 passwordField.setBounds(195, 179, 146, 21);
177 contentPane.add(passwordField);
178 }
179 }
/StudentManager/src/com/wenr/view/Logon.java
1 package com.wenr.view;
2
3 import java.awt.EventQueue;
4
5 import javax.swing.JFrame;
6 import javax.swing.JPanel;
7 import javax.swing.border.EmptyBorder;
8
9 import com.wenr.dao.StudentDao;
10 import com.wenr.model.Course;
11 import com.wenr.model.Student;
12 import com.wenr.util.DBUtil;
13
14
15 import javax.swing.JLabel;
16 import javax.swing.JButton;
17 import java.awt.event.ActionListener;
18 import java.sql.Connection;
19 import java.util.ArrayList;
20 import java.awt.event.ActionEvent;
21 import javax.swing.JTextPane;
22 import java.awt.Color;
23 import javax.swing.ImageIcon;
24 import java.awt.Toolkit;
25
26 @SuppressWarnings("serial")
27 public class StudentView extends JFrame {
28
29 private JPanel contentPane;
30
31 public static void main(String[] args) {
32 EventQueue.invokeLater(new Runnable() {
33 public void run() {
34 try {
35 StudentView frame = new StudentView(null);
36 frame.setVisible(true);
37 } catch (Exception e) {
38 e.printStackTrace();
39 }
40 }
41 });
42 }
43
44 public StudentView(Student student) {
45 setResizable(false);
46 setIconImage(Toolkit.getDefaultToolkit().getImage(".\\resources\\icon_stu.png"));
47 setTitle("学生登录");
48 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
49 setBounds(500, 200, 510, 358);
50
51 contentPane = new JPanel();
52 contentPane.setBackground(new Color(135, 206, 235));
53 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
54 setContentPane(contentPane);
55 contentPane.setLayout(null);
56
57 JLabel label = new JLabel("欢迎，");
58 label.setBounds(181, 23, 41, 15);
59 contentPane.add(label);
60
61 JLabel studentName = new JLabel("New label");
62 studentName.setBounds(217, 23, 118, 15);
63 studentName.setText(student.getSname());
64 contentPane.add(studentName);
65 //
66 DBUtil dbUtil = new DBUtil();
67 StudentDao studentDao = new StudentDao();
68 Connection con = null;
69 String scoreInfo = "";
70 try {
71 con = dbUtil.getCon();
72 ArrayList<Course> course = studentDao.getScrore(con, student);
73 for (Course c: course) {
74 scoreInfo += String.format("%3d", c.getId()) + "\t";
75 scoreInfo += String.format("%20s", c.getName()) + "\t";
76 scoreInfo += String.format("%10.2f", c.getScore()) + "\n";
77 }
78 } catch (Exception e1) {
79 e1.printStackTrace();
80 }
81 System.out.println(scoreInfo.toString());
82 JTextPane tpScore = new JTextPane();
83 tpScore.setEditable(false);
84 tpScore.setText(scoreInfo);
85 tpScore.setBounds(64, 58, 360, 180);
86 contentPane.add(tpScore);
87
88 JButton jbExit = new JButton("退出登录");
89 jbExit.setIcon(new ImageIcon(".\\resources\\icon_exit.png"));
90 jbExit.setBackground(Color.WHITE);
91 jbExit.addActionListener(new ActionListener() {
92 public void actionPerformed(ActionEvent e) {
93 dispose();
94 new Logon().setVisible(true);
95 }
96 });
97 jbExit.setBounds(172, 262, 140, 23);
98 contentPane.add(jbExit);
99 }
100 }
/StudentManager/src/com/wenr/view/StudentView.java
1 package com.wenr.view;
2
3 import java.awt.EventQueue;
4
5 import javax.swing.JFrame;
6 import javax.swing.JPanel;
7 import javax.swing.border.EmptyBorder;
8
9 import com.wenr.dao.CourseDao;
10 import com.wenr.dao.StudentDao;
11 import com.wenr.model.Course;
12 import com.wenr.model.Student;
13 import com.wenr.util.DBUtil;
14 import com.wenr.util.StringUtil;
15
16 import javax.swing.JButton;
17 import java.awt.Color;
18 import java.awt.Toolkit;
19 import javax.swing.ImageIcon;
20 import java.awt.event.ActionListener;
21 import java.sql.Connection;
22 import java.util.ArrayList;
23 import java.awt.event.ActionEvent;
24 import javax.swing.JLabel;
25 import javax.swing.JOptionPane;
26 import javax.swing.JTextField;
27 import javax.swing.JTextArea;
28
29 @SuppressWarnings("serial")
30 public class AdminView extends JFrame {
31
32 private JPanel contentPane;
33 private JTextField queryText;
34 private JLabel lblNewLabel;
35 private JTextArea queryResult;
36
37 public static void main(String[] args) {
38 EventQueue.invokeLater(new Runnable() {
39 public void run() {
40 try {
41 AdminView frame = new AdminView();
42 frame.setVisible(true);
43 } catch (Exception e) {
44 e.printStackTrace();
45 }
46 }
47 });
48 }
49
50 public AdminView() {
51 setResizable(false);
52 setIconImage(Toolkit.getDefaultToolkit().getImage(".\\resources\\icon_admin.png"));
53 setBackground(new Color(144, 238, 144));
54 setTitle("管理员登录");
55 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
56 setBounds(500, 200, 510, 358);
57 contentPane = new JPanel();
58 contentPane.setBackground(new Color(135, 206, 235));
59 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
60 setContentPane(contentPane);
61 contentPane.setLayout(null);
62
63 JButton btnExit = new JButton("退出登录");
64 btnExit.addActionListener(new ActionListener() {
65 public void actionPerformed(ActionEvent e) {
66 dispose();
67 new Logon().setVisible(true);
68 }
69 });
70 btnExit.setIcon(new ImageIcon(".\\resources\\icon_exit.png"));
71 btnExit.setBackground(new Color(255, 255, 255));
72 btnExit.setBounds(185, 273, 125, 28);
73 contentPane.add(btnExit);
74
75 queryText = new JTextField();
76 queryText.setBounds(36, 48, 330, 28);
77 contentPane.add(queryText);
78 queryText.setColumns(10);
79
80 queryResult = new JTextArea();
81 queryResult.setEditable(false);
82 queryResult.setBounds(46, 102, 405, 154);
83 contentPane.add(queryResult);
84
85 JButton btQuery = new JButton("查询");
86 btQuery.addActionListener(new ActionListener() {
87 public void actionPerformed(ActionEvent e) {
88 String info = queryText.getText();
89 if (StringUtil.isEmpty(info)) {
90 JOptionPane.showMessageDialog(null, "查询信息不能为空!");
91 return ;
92 }
93 Student student = new Student(info);
94 Course course = new Course(info);
95
96 DBUtil dbUtil = new DBUtil();
97 StudentDao studentDao = new StudentDao();
98 CourseDao courseDao = new CourseDao();
99
100 Connection con = null;
101 try {
102 con = dbUtil.getCon();
103 ArrayList<Course> courseList = studentDao.getScrore(con, student);
104 ArrayList<Student> studentList = courseDao.getStudent(con, course);
105 String result = "";
106 for (Course c: courseList) {
107 result += String.format("%3d", c.getId()) + "\t";
108 result += String.format("%20s", c.getName()) + "\t";
109 result += String.format("%10.2f", c.getScore()) + "\n";
110 }
111 for (Student s: studentList) {
112 result += String.format("%10s", s.getSid()) + "\t";
113 result += String.format("%10s", s.getSname()) + "\t";
114 result += String.format("%10.2f", s.getScore()) + "\n";
115 }
116 queryResult.setText(result);
117 } catch (Exception e1) {
118 e1.printStackTrace();
119 }
120 }
121 });
122 btQuery.setIcon(new ImageIcon(".\\resources\\icon_query.png"));
123 btQuery.setBounds(389, 47, 93, 29);
124 contentPane.add(btQuery);
125
126 lblNewLabel = new JLabel("输入要查询的学生姓名或课程名：");
127 lblNewLabel.setBounds(26, 10, 208, 28);
128 contentPane.add(lblNewLabel);
129 }
130 }
/StudentManager/src/com/wenr/view/AdminView.java
时间： 2024-10-02 00:53:57