swing应用(三)：简易学生管理系统

刺骨的言语ヽ痛彻心扉 2023-01-01 14:53 137阅读 0赞

## 要求 ##

**目标：**  
设计一个学生成绩管理系统，能够进行简单的学生成绩输入，查询统计等功能。  
**设计任务：**  
1． 实现定义学生成绩记录，记录包括：学生姓名，性别，学号，课程名，成绩，平均分。

2． 实现学生成绩管理查询系统的菜单管理系统的功能，能查看，添加，修改，删除，统计等操作。

3． 完成查看学生成绩单的功能，此功能可显示所有学生成绩。

4． 实现添加学生成绩记录功能，输入学生成绩并记录到成绩表中。

5． 实现修改学生成绩记录功能，根据学生学号修改或删除课程成绩。

6． 实现统计某门课平均分的功能。

7． 实现按学号查找某位学生成绩的功能。

## 实现 ##

**1、学生类**

class Student{ 
        private String no;
        private String name;
        private String age;//所属班级
        private String score1;
        private String score2;
        private String score3;
        private String score4;
        public Student(String no, String name, String age,String score1,String score2,String score3,String score4) { 
            this.no = no;
            this.name = name;
            this.age = age;
            this.score1 = score1;  
            this.score2 = score2; 
            this.score3 = score3;
            this.score4 = score4; 
        }
    	public String getNo() { 
    		return no;
    	}
    	public void setNo(String no) { 
    		this.no = no;
    	}
    	public String getScore1() { 
    		return score1;
    	}
    	public void setScore1(String score1) { 
    		this.score1 = score1;
    	}
    	public String getScore2() { 
    		return score2;
    	}
    	public void setScore2(String score2) { 
    		this.score2 = score2;
    	}
    	public String getScore3() { 
    		return score3;
    	}
    	public void setScore3(String score3) { 
    		this.score3 = score3;
    	}
    	public String getScore4() { 
    		return score4;
    	}
    	public void setScore4(String score4) { 
    		this.score4 = score4;
    	}
    	
    	public void setName(String name){ 
    		this.name=name;
    	}
    	
    	public String getName(){ 
    		return name;
    	}
    	
    	public void setAge(String age){ 
    		this.age=age;
    	}
    	
    	public String getAge(){ 
    		return age;
    	}
    }

**2、学生集合类**

class Class{ 
       ArrayList<Student> stuList;
       public Class(){ 
           this.stuList=new ArrayList<>();
       }
       public void addStudent(Student stu){ 
           this.stuList.add(stu);
       }
       public void deleteStudent(Student s){ 
           this.stuList.remove(s);
       }
    }

**3、集合转数组工具类**

import java.lang.reflect.Field;
    import java.lang.reflect.Method;
    import java.util.ArrayList;
    import java.util.List;
    public class ListToArray { 
        /** * 获取对象属性，返回一个字符串数组 * @param o 对象 * @return String[] 字符串数组 */
        private String[] getFiledName(Object o) { 
            try { 
                Field[] fields = o.getClass().getDeclaredFields();
                String[] fieldNames = new String[fields.length];
                for (int i = 0; i < fields.length; i++) { 
                    fieldNames[i] = fields[i].getName();
                }
                return fieldNames;
            } catch (SecurityException e) { 
                e.printStackTrace();
                System.out.println(e.toString());
            }
            return null;
        }
        
        /** * 使用反射根据属性名称获取t属性的get方法 * @param fieldName 属性名称 * @param o 操作对象 * @return List<Method> get方法 */
        private List<Method> getGetField(String[] fieldNames, Object o) { 
            List<Method> methods=new ArrayList<Method>();
            for (String fieldName : fieldNames) { 
                String firstLetter = fieldName.substring(0, 1).toUpperCase();
                String getter = "get" + firstLetter + fieldName.substring(1);
                Method method = null;
                try { 
                    method = o.getClass().getMethod(getter);
                } catch (NoSuchMethodException e) { 
                    System.out.println("属性不存在");
                    continue;
                }
                //Object value = method.invoke(o, new Object[] {});
                methods.add(method);
            }
            return methods;
        }
        /** * 将list集合转换为二维string数组 * @param list 要转换的集合 * @return String[][] 返回的sting数组 */
        public String[][] listToArrayWay(List list) { 
            Object o=list.get(0);
            String[] filedNames = getFiledName(o);
            int filedNum=filedNames.length;
            int listSize=list.size();
            List<Method> methods=getGetField(filedNames, o);
            
            String[][] arrs=new String[listSize][filedNum];
            int i=0;
            for (Object object : list) { 
                int j=0;
                for (Method method : methods) { 
                    Object value=null;
                    try { 
                        value = method.invoke(object, new Object[] { });
                    } catch (Exception e) { 
                        System.out.println("属性不存在"+e);
                    }
                    arrs[i][j]=(String) value;
                    j++;
                }
                i++;
            }
            return arrs;
        }
    }

**4、登录窗体类**

**5、表格类**

import java.awt.Color;
    import java.awt.Dimension;
    import java.awt.GridLayout;
    import java.util.List;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    public class StudentTable { 
    	public StudentTable(List<Student> list){ 
    		//定义列名与行数据，其中列名最好用final修饰
    		final Object[] columnNames = { "学号","姓名", "班级", "java","c语言", "python","c++"};
    		//将list集合转为二维数组
    		ListToArray tools=new ListToArray();
    		JTable table1 = new JTable (tools.listToArrayWay(list),columnNames);//12行6列的空表格
    		//创建窗口中将要用到的面板
    		JScrollPane pane1 = new JScrollPane (table1);
    		JPanel pan = new JPanel (new GridLayout (0, 1));
    		pan.setPreferredSize (new Dimension (600,250));
    		pan.setBackground (Color.black);
    		pan.add (pane1);
    		//创建窗口
    		JFrame frm = new JFrame ("学生成绩表");
    		frm.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);//关闭子窗体的时候不会自动关闭父窗体
    		frm.setContentPane (pan);
    		frm.pack();
    		frm.setVisible(true);
    	}
    }

6、主体类

import java.awt.Color;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;
    public class StudentFrame extends JFrame { 
        Class c = new Class();
        JLabel labNo;
        JLabel labName;
        JLabel labAge;
        JLabel labscore1;
        JLabel labscore2;
        JLabel labscore3;
        JLabel labscore4;
        JLabel labscore5;
        JLabel labTip;
        JLabel labavr;
        JTextField txtNo;
        JTextField txtName;
        JTextField txtAge;
        JTextField txtscore1;
        JTextField txtscore2;
        JTextField txtscore3;
        JTextField txtscore4;
        JTextField txtscore5;
        JTextField txtavr;
        //JButton btnaver;
        JButton btnAdd;
        JButton btnRemove;
        JButton btnModify;
        JButton btnClear;
        JButton btnFirst;
        JButton btnPrev;
        JButton btnNext;
        JButton btnLast;
        JButton btnGrade;
        JButton btnCheck;
        JOptionPane dialog;
    
        public StudentFrame() { 
            this.setBounds(300, 100, 650, 530);
            this.setTitle("学生信息管理系统");
            this.setLayout(null);
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            studentin(); 
            addStu();
            firstStudent();
            lastStudent();
            previous();
            next();
            remove();
            check();
            modify();
            clear();
            //aver();
            gradeList();
            this.setVisible(true);    
        }
    
        public void studentin() { 
            labTip = new JLabel("登陆成功 ！您已经进入管理系统（仅输入学号便可查找学生信息）.");
            labTip.setBounds(50, 2, 550, 45);    
            labNo = new JLabel("学生学号:");            
            labNo.setBounds(50, 20, 100, 50);
            txtNo = new JTextField("请输入6位学号：",30);
            txtNo.setBounds(130, 35, 180, 30);              
            labName = new JLabel("学生姓名:");
            labName.setBounds(50, 60, 100, 50);
            txtName = new JTextField("请输入学生姓名：",30);
            txtName.setBounds(130, 76, 180, 30);        
            labAge = new JLabel("班级：");
            labAge.setBounds(50, 100, 50, 50);
            txtAge = new JTextField("请输入学生所在班级：",30);
            txtAge.setBounds(130, 117, 180, 30);
            labscore1 = new JLabel("JAVA 成绩:");         
            labscore1.setBounds(50, 140, 100, 50);
            txtscore1 = new JTextField("请输入学生成绩：",30);
            txtscore1.setBounds(130, 158, 180, 30);
            labscore2 = new JLabel("C语言成绩:");           
            labscore2.setBounds(50, 189, 100, 50);
            txtscore2 = new JTextField("请输入学生成绩：",30);
            txtscore2.setBounds(130, 199, 180, 30);
            labscore3 = new JLabel("Python成绩:");            
            labscore3.setBounds(50, 230, 100, 50);
            txtscore3 = new JTextField("请输入学生成绩：",30);
            txtscore3.setBounds(130, 240, 180, 30);
            labscore4 = new JLabel("C++ 成绩:");          
            labscore4.setBounds(50, 290, 100, 50);
            txtscore4 = new JTextField("请输入学生成绩：",30);
            txtscore4.setBounds(130, 301, 180, 30);
            labscore5 = new JLabel("java平均成绩=");
            labscore5.setBounds(330,290,100,50);
            txtscore5 = new JTextField("java平均成绩",30);
            txtscore5.setBounds(420,301,180,30);
            labavr = new JLabel("操作说明 ** |<< : 第一个学生信息 <:上一位学生信息 >：下一个学生信息 >>|：最后一个学生信息");
            labavr.setBounds(50, 330, 580, 50);
            btnAdd = new JButton("添加");
            btnAdd.setBounds(50, 385, 80, 20);
            btnAdd.setForeground(Color.BLACK);
            btnModify = new JButton("修改");
            btnModify.setBounds(150, 385, 80, 20);
            btnModify.setForeground(Color.BLUE);
            btnRemove = new JButton("删除");
            btnRemove.setBounds(250, 385, 80, 20);
            btnRemove.setForeground(Color.RED);
            btnClear = new JButton("清空");
            btnClear.setBounds(350, 385, 80, 20);
            btnClear.setForeground(Color.GREEN);
            btnGrade = new JButton("成绩单");
            btnGrade.setBounds(350, 60, 160, 50);
            btnGrade.setForeground(Color.BLACK);
            btnCheck = new JButton("查找信息");
            btnCheck.setBounds(350, 145, 160, 50);
            btnCheck.setForeground(Color.BLACK);
            btnFirst = new JButton("|<<");
            btnFirst.setBounds(50, 432, 80, 20);
            btnFirst.setForeground(Color.PINK);
            btnPrev = new JButton("<");
            btnPrev.setBounds(150, 432, 80, 20);
            btnPrev.setForeground(Color.BLACK);
            btnNext = new JButton(">");
            btnNext.setBounds(250, 432, 80, 20);
            btnNext.setForeground(Color.BLACK);
            btnLast = new JButton(">>|");
            btnLast.setBounds(350, 432, 80, 20);
            btnLast.setForeground(Color.PINK);
            /*btnaver = new JButton("平均成绩"); btnaver.setBounds(350, 220, 150, 50); btnaver.setForeground(Color.BLACK);*/
            this.add(labNo);
            this.add(labName);
            this.add(labAge);
            this.add(labscore1);
            this.add(txtNo);
            this.add(labTip);
            this.add(txtName);
            this.add(txtAge);
            this.add(txtscore1);
            this.add(btnAdd);
            this.add(btnRemove);
            this.add(btnModify);
            this.add(btnClear);
            this.add(btnFirst);
            this.add(btnPrev);
            this.add(btnNext);
            this.add(btnLast);
            this.add(btnGrade);
            this.add(btnCheck);
            //this.add(btnaver);
            this.add(labavr);
            this.add(labscore2);
            this.add(txtscore2);
            this.add(labscore3);
            this.add(txtscore3); 
            this.add(labscore4);
            this.add(txtscore4);
            this.add(labscore5);
            this.add(txtscore5);
    	}
    
        public boolean blank() { 
            if (txtNo.getText().equals("")) { 
                dialog.showMessageDialog(null, "学号输入有误 请重新输入！");
                return false;
            }
            if (txtName.getText().equals("")) { 
                dialog.showMessageDialog(null, "名字输入有误 请重新输入！");
                return false;
            }
            if (txtAge.getText().equals("")) { 
                dialog.showMessageDialog(null, "班级输入有误 请重新输入！");
                return false;
            }if (txtscore1.getText().equals("")) { 
                dialog.showMessageDialog(null, "成绩输入有误 请重新输入！");
                return false;
            }if (txtscore2.getText().equals("")) { 
                dialog.showMessageDialog(null, "成绩输入有误 请重新输入！");
                return false;
            }
            if (txtscore3.getText().equals("")) { 
                dialog.showMessageDialog(null, "成绩输入有误 请重新输入！");
                return false;
            }
            if (txtscore4.getText().equals("")) { 
                dialog.showMessageDialog(null, "成绩输入有误 请重新输入！");
                return false;
            }
            return true;
        }
    
        public void addStu() { 
           btnAdd.addActionListener(new ActionListener() { 
    
           public void actionPerformed(ActionEvent e) { 
             if (blank() == true) { 
                      c.addStudent(new Student(txtNo.getText(), txtName.getText(), txtAge.getText(),txtscore1.getText(),txtscore2.getText(),txtscore3.getText(),txtscore4.getText()));
                      dialog.showMessageDialog(null, "学生信息已添加成功");
             }
             //查询java平均成绩
             float sum=0;
             for (Student stu : c.stuList) { 
    			sum+=Integer.valueOf(stu.getScore1());
    		 }
             if (!c.stuList.isEmpty()) { 
            	 txtscore5.setText(sum/c.stuList.size()+"");
    		}
             }
           });
    	}
        public void firstStudent() {      
            btnFirst.addActionListener(new ActionListener() { 
    
                public void actionPerformed(ActionEvent e) { 
                    txtNo.setText(c.stuList.get(0).getNo());
                    txtName.setText(c.stuList.get(0).getName());
                    txtAge.setText(c.stuList.get(0).getAge());
                    txtscore1.setText(c.stuList.get(0).getScore1());
                    txtscore2.setText(c.stuList.get(0).getScore2());
                    txtscore3.setText(c.stuList.get(0).getScore3());
                    txtscore4.setText(c.stuList.get(0).getScore4());
    
                }
            });
        }
        public void lastStudent() { 
            btnLast.addActionListener(new ActionListener() { 
    
                public void actionPerformed(ActionEvent e) { 
                    txtNo.setText(c.stuList.get(c.stuList.size() - 1).getNo());
                    txtName.setText(c.stuList.get(c.stuList.size() - 1).getName());
                    txtAge.setText(c.stuList.get(c.stuList.size() - 1).getAge());
                    txtscore1.setText(c.stuList.get(c.stuList.size() - 1).getScore1());
                    txtscore2.setText(c.stuList.get(c.stuList.size() - 1).getScore2());
                    txtscore3.setText(c.stuList.get(c.stuList.size() - 1).getScore3());
                    txtscore4.setText(c.stuList.get(c.stuList.size() - 1).getScore4());
                }
            });
        }
    
        public void previous() { 
            btnPrev.addActionListener(new ActionListener() { 
    
                public void actionPerformed(ActionEvent e) { 
                    int n = 0;
                    for (int i = 0; i < c.stuList.size(); i++) { 
                        if (c.stuList.get(i).getNo().equals(txtNo.getText())) { 
                            n = i - 1;
                        }
                    }
                    if (c.stuList.get(0).getNo().equals(txtNo.getText())) { 
                        dialog.showMessageDialog(null, "再无上一个学生");
                    } else { 
                        txtNo.setText(c.stuList.get(n).getNo());
                        txtName.setText(c.stuList.get(n).getName());
                        txtAge.setText(c.stuList.get(n).getAge());
                        txtscore1.setText(c.stuList.get(n).getScore1());
                        txtscore2.setText(c.stuList.get(n).getScore2());
                        txtscore3.setText(c.stuList.get(n).getScore3());
                        txtscore4.setText(c.stuList.get(n).getScore4());
                        }
                }
            });
        }
    
        public void next() { 
            btnNext.addActionListener(new ActionListener() { 
                public void actionPerformed(ActionEvent e) { 
                    int n = 0;
                    for (int i = 0; i < c.stuList.size(); i++) { 
                        if (c.stuList.get(i).getNo().equals(txtNo.getText())) { 
                            n = i + 1;
                        }
                    }
                    if (c.stuList.get(c.stuList.size() - 1).getNo().equals(txtNo.getText())) { 
                        dialog.showMessageDialog(null, "再无下一个学生");
                    } else { 
                        txtNo.setText(c.stuList.get(n).getNo());
                        txtName.setText(c.stuList.get(n).getName());
                        txtAge.setText(c.stuList.get(n).getAge());
                        txtscore1.setText(c.stuList.get(n).getScore1());
                        txtscore2.setText(c.stuList.get(n).getScore2());
                        txtscore3.setText(c.stuList.get(n).getScore3());
                        txtscore4.setText(c.stuList.get(n).getScore4());}
                }
            });
        }
    
        public void remove() { 
            btnRemove.addActionListener(new ActionListener() { 
    
                public void actionPerformed(ActionEvent e) { 
                    if (c.stuList.size() == 0) { 
                        JOptionPane.showMessageDialog(null, "没有该学生信息");
                    } else { 
                        Student s = new Student(txtNo.getText(), txtName.getText(), txtAge.getText(),txtscore1.getText(),txtscore2.getText(),txtscore3.getText(),txtscore4.getText());
                        if (blank() == true) { 
                            System.out.println(c.stuList.contains(s));
                            System.out.println(s);
                            if (!c.stuList.contains(s)) { 
                                c.deleteStudent(s);
                                JOptionPane.showMessageDialog(null, "已经删除成功");
                                int a = 0;
                                for (int i = 0; i < c.stuList.size(); i++) { 
                                    if (c.stuList.get(i).getNo().equals(txtNo.getText())) { 
                                        a = i + 1;
                                    }
                                }
                                if (c.stuList.size() > 0) { 
                                    if (c.stuList.get(c.stuList.size() - 1).getNo().equals(txtNo.getText())) { 
                                        txtNo.setText(c.stuList.get(0).getNo());
                                        txtName.setText(c.stuList.get(0).getName());
                                        txtAge.setText(c.stuList.get(0).getAge());
                                        txtscore1.setText(c.stuList.get(0).getScore1());
                                        txtscore2.setText(c.stuList.get(0).getScore2());
                                        txtscore3.setText(c.stuList.get(0).getScore3());
                                        txtscore4.setText(c.stuList.get(0).getScore4());
                                    } else { 
                                        txtNo.setText(c.stuList.get(a).getNo());
                                        txtName.setText(c.stuList.get(a).getName());
                                        txtAge.setText(c.stuList.get(a).getAge());
                                        txtscore1.setText(c.stuList.get(a).getScore1());
                                        txtscore2.setText(c.stuList.get(a).getScore2());
                                        txtscore3.setText(c.stuList.get(a).getScore3());
                                        txtscore4.setText(c.stuList.get(a).getScore4());
                                    }
                                } else { 
                                    clear();
                                }
                            } else { 
                                dialog.showMessageDialog(null, "未来找到对应学生的信息");  }}
                    }
                }
            });
        }
    
        public void modify() { 
            btnModify.addActionListener(new ActionListener() { 
                public void actionPerformed(ActionEvent e) { 
                    if (c.stuList.size() == 0) { 
                        dialog.showMessageDialog(null, "没有该学生信息");
                    }
                    for (Student s : c.stuList) { 
                        if (s.getNo().equals(txtNo.getText())) { 
                            if (blank() == true) { 
                                s.setName(txtName.getText());
                                s.setAge(txtAge.getText());
                                JOptionPane.showMessageDialog(null, "已经修改成功");
                                return;
                            }
                        }
                    }
                    JOptionPane.showMessageDialog(null, "修改失败请重新操作");
                }
            });
        }
    
        public void check() { 
            btnCheck.addActionListener(new ActionListener() { 
                public void actionPerformed(ActionEvent e) { 
                    if ((txtNo.getText().equals(""))) { 
                        dialog.showMessageDialog(null, "学号不能为空 请从新输入");
                    } else { 
                        int m = 0;
                        for (int i = 0; i < c.stuList.size(); i++) { 
                            if (c.stuList.get(i).getNo().equals(txtNo.getText())) { 
                                JOptionPane.showMessageDialog(null, "已查到该学生信息");
                                txtName.setText(c.stuList.get(i).getName());
                                txtAge.setText(c.stuList.get(i).getAge());
                                txtscore1.setText(c.stuList.get(i).getScore1());
                                txtscore2.setText(c.stuList.get(i).getScore2());
                                txtscore3.setText(c.stuList.get(i).getScore3());
                                txtscore4.setText(c.stuList.get(i).getScore4());
                                break;}
                                 m++;}
                        if (m == c.stuList.size()) { 
                            dialog.showMessageDialog(null, "没有此学生的相关信息");
                            return;  }
                    }
                }
            });
        }
        
        /*public void aver() { btnaver.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(null, "20"); } }); }*/
    
        public void clear() { 
            btnClear.addActionListener(new ActionListener() { 
                public void actionPerformed(ActionEvent e) { 
                    txtNo.setText("");
                    txtName.setText("");
                    txtAge.setText("");
                    txtscore1.setText("");
                    txtscore2.setText("");
                    txtscore3.setText("");
                    txtscore4.setText("");
                    txtscore5.setText("");
                }
            }
            );
        }
        
        public void gradeList(){ 
        	btnGrade.addActionListener(new ActionListener() { 
    			@Override
    			public void actionPerformed(ActionEvent e) { 
    				System.out.println(e.getActionCommand());
    				if (!c.stuList.isEmpty()) { 
    					StudentTable studentTable=new StudentTable(c.stuList);
    				}else{ 
    					JOptionPane.showMessageDialog(null, "无学生成绩记录");
    				}
    			}
    		});
        }
    
        public static void main(String[] args) { 
             new menu();             
        }

有问题可以私信或者在评论区留言。写作不易，既然来了，不妨点个关注，点个赞吧！！！