Java课程设计完整版

╰半橙微兮° 2022-08-02 01:53 197阅读 0赞

补充之前的java课程设计，不仅仅只有方法，更加人性化的在控制台给予提示输入，加入了键盘输入的代码  
下面是源码，很长的

前两个类仅仅是判断是多了equals()方法，不知道为什么，加入了键盘输入方法就必须这么判断，  
可能以前不规范吧

package qfy;
    class myclass implements Comparable<myclass>{ 
        String classnum;
        String classname;
        String classyuan;
        String classtest;
        String classtype;
        String type;
        public myclass(String num,String name,String yuan,String test){
            classnum=num;
            classname=name;
            classtest=test;
            classyuan=yuan;
    
        }
    //获得到所有的属性
        public String getMyclass(){
            return classnum+" "+classname+" "+classyuan+" "+classtest;
        }
    //通过判断传来的字符串，来选择性修改某个属性,老方法
        public String changeMyclass(String classtype,String now){
           if(classtype.equals("成绩")){
               this.classtest=now;
               return this.classtype;
           }
           if(classtype.equals("学号")){
               return this.classnum=now;
           }
           if(classtype.equals("姓名")){
               return this.classname=now;
           }
           if(classtype.equals("学院")){
               return this.classyuan=now;
           }
           return "ok";
        }
        public String getClassname(){
            return classname;
        }
        public int compareTo(myclass o) {
            // TODO Auto-generated method stub
            return this.classtest.compareTo(o.classtest);
        }
    
    }

package qfy;
    
    class teacher implements Comparable<teacher> { 
        String teachernum;
        String teachername;
        String teachertel;
        public teacher(String num,String name,String tel){
            teachertel=tel;
            teachername=name;
            teachernum=num;
    
    
        }
        //获得到所有的属性
            public String getTeacher(){
                return teachernum+" "+teachername+" "+teachertel;
            }
        //通过判断传来的字符串，来选择性修改某个属性
            public String changeTeacher(String classtype,String now){
               if(classtype=="teachernum"){
                   return this.teachernum=now;
               }
               if(classtype=="teachername"){
                   return this.teachername=now;
               }
               if(classtype=="teachertel"){
                   return this.teachertel=now;
               }
               return "ok";
            }
            public String getTeachername(){
                return teachername;
            }
            public int compareTo(teacher o) {
                // TODO Auto-generated method stub
                return this.teachernum.compareTo(o.teachernum);
            }
    
        }

下面的两个改变的比较大，主要是加入了键盘输入

package qfy;
    
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileReader;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    import java.util.Scanner;
    
    public class test {
        public static void main(String[] args) throws IOException {
            System.out.println("欢迎进入学生系统");
            List<myclass> list = new ArrayList<myclass>();
            // 添加OK
    
            // 查找OK
            //
            // 改变OK
            // 
    
            // 删除调用OK
            // 
            // System.out.println(list.size());
            // 排序调用
            // 
            while (true) {
                System.out.println("请输入想要进行的操作");
                Scanner in = new Scanner(System.in);
                System.out.println("添加"+" "+"查找"+" "+"修改"+" "+"删除"+" "+"排序");
                String string = in.next();
                if(string.equals("添加")){
                    addclass(list);
                }
                if(string.equals("查找")){
                    getMyClass(list);
                }
                if(string.equals("修改")){
                    changetype(list);
                }
                if(string.equals("删除")){
                    remove(list);
                }
                if(string.equals("排序")){
                    sort(list);
                }
                File file = new File("myclass.db");
                if (!file.exists()) {
                    file.createNewFile();
                }
                // 写
                FileWriter fw = new FileWriter(file);
                for (int i = 0; i < list.size(); i++) {
                    String result = myclassToString(list.get(i));
                    fw.write(result + "\n");
                }
                fw.close();
                System.out.println("========================================");
                // 读
                BufferedReader br = new BufferedReader(new FileReader(file));
                String temp;
                while ((temp = br.readLine()) != null) {
                    System.out.println(temp);
                }
                br.close();
    
            }
        }
    
        // 删除的方法
        public static void remove(List<myclass> list) {
            int i = 0;
            Scanner in = new Scanner(System.in);
            System.out.println("请输入删除对象的名字");
            String name = in.next();
            int j=0;
            for (i = 0; i < list.size(); i++) {
                if (list.get(i).getClassname().equals(name)) {
                    list.remove(i);
                    System.out.println("删除成功");
                    j=1;
                    break;
                }
            }
            if (j==0) {
                System.out.println("查无此人，请输入正确人名");
            }
        }
    
        // 排序方法
        public static void sort(List<myclass> list) {
            Collections.sort(list);
            for (int i = 0; i < list.size(); i++) {
                System.out.println(list.get(i).getMyclass());
            }
        }
    
        // 变成字符串
        public static String myclassToString(myclass my) {
            String result = null;
            StringBuffer mystr = new StringBuffer();
            mystr.append(my.classnum + " ");
            mystr.append(my.classname + " ");
            mystr.append(my.classyuan + " ");
            mystr.append(my.classtest + " ");
            result = mystr.toString();
            return result;
        }
    
        // 查找
        public static void getMyClass(List<myclass> list) {
            Scanner in = new Scanner(System.in);
            System.out.println("请输入所知任意信息");
            String string = in.next();
            for (int i = 0; i < list.size(); i++) {
                if ((list.get(i).getMyclass()).indexOf(string) != -1) {
                    System.out.println("资料如下");
                    System.out.println(list.get(i).getMyclass());
                    break;
                } else {
                    System.out.println("查无此人");
                    break;
                }
            }
        }
    
        // 添加方法
        public static void addclass(List<myclass> list) {
            Scanner in = new Scanner(System.in);
            System.out.println("请输入学号");
            String num = in.next();
            System.out.println("请输入姓名");
            String name = in.next();
            System.out.println("请输入学院");
            String yuan = in.next();
            System.out.println("请输入成绩");
            String test = in.next();
            list.add(new myclass(num, name, yuan, test));
        }
    
        // 改变方法 changetype(list,"classname","ly", "qqq");
        public static void changetype(List<myclass> list) {
            // char saveoldtype=oldtype;
            Scanner in = new Scanner(System.in);
            System.out.println("请输入该人任意信息");
            String classtype = in.nextLine();
            System.out.println("请输入原来信息");
            String oldtype = in.nextLine();
            System.out.println("请输入修改信息");
            String now = in.nextLine();
            for (int i = 0; i < list.size(); i++) {
                if ((list.get(i).getMyclass()).indexOf(oldtype) != -1) {
                    System.out.println("修改完成,结果如下");
                    list.get(i).changeMyclass(classtype, now);
                    System.out.println(list.get(0).getMyclass());
                    break;
                } else {
                    System.out.println("没有资料，无法修改");
                    break;
                }
            }
        }
    }

package qfy;
    
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileReader;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    import java.util.Scanner;
    
    public class test_teacher {
        public static void main(String[] args) throws IOException {
            List<teacher> list = new ArrayList<teacher>();
            System.out.println("欢迎进入老师系统");
            while (true) {
                System.out.println("请输入想要进行的操作");
                Scanner in = new Scanner(System.in);
                System.out.println("添加"+" "+"查找"+" "+"修改"+" "+"删除"+" "+"排序");
                String string = in.next();
                if(string.equals("添加")){
                    addclass(list);
                }
                if(string.equals("查找")){
                    getTeaCher(list);
                }
                if(string.equals("修改")){
                    changetype(list);
                }
                if(string.equals("删除")){
                    remove(list);
                }
                if(string.equals("排序")){
                    sort(list);
                }
                File file = new File("myclass.db");
                if (!file.exists()) {
                    file.createNewFile();
                }
                // 写
                FileWriter fw = new FileWriter(file);
                for (int i = 0; i < list.size(); i++) {
                    String result = teacherToString(list.get(i));
                    fw.write(result + "\n");
                }
                fw.close();
                System.out.println("========================================");
                // 读
                BufferedReader br = new BufferedReader(new FileReader(file));
                String temp;
                while ((temp = br.readLine()) != null) {
                    System.out.println(temp);
                }
                br.close();
    
            }
        }
    
    
    
    
        // 删除的方法
        public static void remove(List<teacher> list) {
            int i = 0;
            Scanner in = new Scanner(System.in);
            System.out.println("请输入删除对象的名字");
            String name = in.next();
            int j=0;
            for (i = 0; i < list.size(); i++) {
                if (list.get(i).getTeachername().equals(name)) {
                    list.remove(i);
                    System.out.println("删除成功");
                    j=1;
                    break;
                }
            }
            if (j==0) {
                System.out.println("查无此人，请输入正确人名");
            }
        }
    
        // 排序方法
        public static void sort(List<teacher> list) {
            Collections.sort(list);
            for (int i = 0; i < list.size(); i++) {
                System.out.println(list.get(i).getTeacher());
            }
        }
    
        // 变成字符串
        public static String teacherToString( teacher teacher) {
            String result = null;
            StringBuffer mystr = new StringBuffer();
            mystr.append(teacher.teachernum + " ");
            mystr.append(teacher.teachername + " ");
            mystr.append(teacher.teachertel+" ");
            result = mystr.toString();
            return result;
        }
    
        // 查找
        public static void getTeaCher(List<teacher> list) {
            Scanner in = new Scanner(System.in);
            System.out.println("请输入所知任意信息");
            String string = in.next();
            for (int i = 0; i < list.size(); i++) {
                if((list.get(i).getTeacher()).indexOf(string)!=-1){
                    System.out.println("资料如下");
                    System.out.println(list.get(i).getTeacher());
                    break;
                }else{
                    System.out.println("查无此人");
                    break;
                }
            }
        }
        //添加
        public static void addclass(List<teacher> list){
            Scanner in = new Scanner(System.in);
            System.out.println("请输入学号");
            String num = in.next();
            System.out.println("请输入姓名");
            String name = in.next();
            System.out.println("请输入电话");
            String tel = in.next();
            list.add(new teacher(num, name, tel));
        }
        //改变方法 changetype(list,"teachername","qfy", "qqq");
            public static void changetype(List<teacher> list){
                //char saveoldtype=oldtype;
                Scanner in = new Scanner(System.in);
                System.out.println("请输入该人任意信息");
                String classtype = in.nextLine();
                System.out.println("请输入原来信息");
                String oldtype = in.nextLine();
                System.out.println("请输入修改信息");
                String now = in.nextLine();
                for (int i = 0; i < list.size(); i++) {
                    if((list.get(i).getTeacher()).indexOf(oldtype)!=-1){
                        System.out.println("修改完成,结果如下");
                        list.get(i).changeTeacher(classtype,now);
                        System.out.println(list.get(0).getTeacher());
                        break;
                    }else{
                        System.out.println("没有资料，无法修改");
                        break;
                    }
                }
            }
    
    }