Java实现成绩录入系统

Bertha 。 2023-06-27 06:29 2阅读 0赞

今天我们用Java来实现一个成绩录入系统  
首先创建学生类

### Student.java ###

public class Student { 
        private String name;
        private int chinese;
        private int math;
        private int english;
    
        public Student(String name, int chinese, int math, int english) { 
            this.name = name;
            this.chinese = chinese;
            this.math = math;
            this.english = english;
        }
    
        public Student() { 
        }
    
        public String getName() { 
            return this.name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
        public int getChinese() { 
            return this.chinese;
        }
    
        public void setChinese(int chinese) { 
            this.chinese = chinese;
        }
    
        public int getMath() { 
            return this.math;
        }
    
        public void setMath(int math) { 
            this.math = math;
        }
    
        public int getEnglish() { 
            return this.english;
        }
    
        public void setEnglish(int english) { 
            this.english = english;
        }
    
        public int getSum() { 
            return this.chinese + this.math + this.english;
        }
    }

开始成绩录入

### StudentDemo.java ###

import java.io.BufferedWriter;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.util.Comparator;
    import java.util.Iterator;
    import java.util.Scanner;
    import java.util.TreeSet;
    
    public class StudentDemo { 
        public StudentDemo() { 
        }
    
        public static void main(String[] args) throws IOException { 
            TreeSet<Student> ts = new TreeSet(new Comparator<Student>() { 
                public int compare(Student s1, Student s2) { 
                    int num = s2.getSum() - s1.getSum();
                    int num2 = num == 0 ? s1.getName().compareTo(s2.getName()) : num;
                    return num2;
                }
            });
            System.out.println("学生录入开始----------------------");
    
            for(int x = 1; x <= 5; ++x) { 
                Scanner sc = new Scanner(System.in);
                System.out.println("请输入第" + x + "个学生的姓名：");
                String name = sc.nextLine();
                System.out.println("请输入第" + x + "个学生的语文成绩：");
                int chinese = sc.nextInt();
                System.out.println("请输入第" + x + "个学生的数学成绩：");
                int math = sc.nextInt();
                System.out.println("请输入第" + x + "个学生的英语成绩：");
                int english = sc.nextInt();
                Student s = new Student();
                s.setName(name);
                s.setChinese(chinese);
                s.setMath(math);
                s.setEnglish(english);
                ts.add(s);
            }
    
            System.out.println("学生录入结束----------------------");
            BufferedWriter bw = new BufferedWriter(new FileWriter("students.txt"));
            bw.write("姓名,语文成绩,数学成绩,英语成绩");
            bw.newLine();
            bw.flush();
            Iterator var11 = ts.iterator();
    
            while(var11.hasNext()) { 
                Student s = (Student)var11.next();
                StringBuilder sb = new StringBuilder();
                sb.append(s.getName()).append(",").append(s.getChinese()).append(",").append(s.getMath()).append(",").append(s.getEnglish());
                bw.write(sb.toString());
                bw.newLine();
                bw.flush();
            }
    
            bw.close();
            System.out.println("数据成功写入文件");
        }
    }

运行效果  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXp1b3Bpbmc_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXp1b3Bpbmc_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXp1b3Bpbmc_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/202001051122245.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXp1b3Bpbmc=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXp1b3Bpbmc_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200105112242420.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXp1b3Bpbmc=,size_16,color_FFFFFF,t_70