java中用集合編寫簡單的學生資訊管理系統
阿新 • • 發佈：2019-01-04
public class Info { private int stu_id; private String stu_name; private String stu_sex; private int stu_age; private int chinese; private int math; private int english; private String stu_address; public int getStu_id() { return stu_id; } public void setStu_id(int stu_id) { this.stu_id = stu_id; } public String getStu_name() { return stu_name; } public void setStu_name(String stu_name) { this.stu_name = stu_name; } public String getStu_sex() { return stu_sex; } public void setStu_sex(String stu_sex) { this.stu_sex = stu_sex; } public int getStu_age() { return stu_age; } public void setStu_age(int stu_age) { this.stu_age = stu_age; } public int getChinese() { return chinese; } public void setChinese(int chinese) { this.chinese = chinese; } public int getMath() { return math; } public void setMath(int math) { this.math = math; } public int getEnglish() { return english; } public void setEnglish(int english) { this.english = english; } public String getStu_address() { return stu_addrese; } public void setStu_address(String stu_address) { this.stu_addrese = stu_address; } public double getAvgScose(){ return (math+chinese+english)/3; } public int getSunScose(){ return math+chinese+english; } } import java.io.ObjectInputStream.GetField; import java.util.Scanner; public class ChooseDemo { /* *得到int型別的資料 */ public int getInputIntInfo(String info){ int input_int=0; try{ System.out.println(info); Scanner s=new Scanner(System.in); input_int=s.nextInt(); }catch (Exception e) { System.out.println("輸入錯誤！！請重新輸入。"); input_int=getInputIntInfo(info); } return input_int; } /* *得到String型別的資料 */ public String getInputStringInfo(String string){ String input_String=""; try{ System.out.println(string); Scanner s=new Scanner(System.in); input_String=s.next(); }catch (Exception e) { System.out.println("輸入錯誤！！請重新輸入"); input_String=getInputStringInfo(string); } return input_String; } public void menu(){ System.out.println("************************"); System.out.println("歡迎進入學生資訊管理系統"); System.out.println("1.新增學生資訊"); System.out.println("2.修改學生資訊（根據學號修改）"); System.out.println("3.修改學生資訊（根據姓名修改）"); System.out.println("4.刪除學生資訊(根據學號刪除)"); System.out.println("5.刪除學生資訊(根據姓名刪除)"); System.out.println("6.查詢所有學生資訊"); System.out.println("7.查詢學生資訊（根據學號）"); System.out.println("8.查詢學生資訊（根據姓名）"); System.out.println("9.退出系統"); System.out.println("************************"); } public void Choose(int coad){ switch (coad) { //新增學生資訊 case 1: System.out.println("<---你已進入新增學生資訊介面--->"); Info add_info=getStudentInfo(); if(!(Handle.selectStuId(add_info.getStu_id()))){ if(Handle.AddInfo(add_info)){ System.out.println("\n新增成功！！\n"); }else{ System.out.println("\n新增失敗！！\n"); } }else{ System.out.println("該學號已存在！！！ 請重新新增！！"); } break; //修改學生資訊（根據學號修改） case 2: System.out.println("<---你已進入修改學生資訊（根據學號修改）介面--->"); int update_id=getInputIntInfo("請輸入學號"); if(Handle.selectStuId(update_id)){ System.out.println("<---請輸入新的學生資訊--->"); Info update_infoById=getStudentInfo(); if(!(Handle.selectStuId(update_infoById.getStu_id()))||update_infoById.getStu_id()==update_id){ if(Handle.updateInfoById(update_id,update_infoById)){ System.out.println("\n修改成功！！！\n"); }else{ System.out.println("\n修改失敗！！！\n"); } }else{ System.out.println("該學號的學生資訊已存在！！！ 請重新新增！！"); } }else{ System.out.println("\n沒有該學號的學生資訊！！請重新選擇！\n"); } break; //修改學生資訊（根據姓名修改） case 3: System.out.println("<---你已進入修改學生資訊（根據姓名修改）介面--->"); String update_name=getInputStringInfo("請輸入姓名"); if(Handle.selectStuName(update_name)){ System.out.println("<---請輸入新的學生資訊--->"); Info update_infoByName=getStudentInfo(); if(!(Handle.selectStuId(update_infoByName.getStu_id()))||update_name.equals(update_infoByName.getStu_name())){ if(Handle.updateInfoByName(update_name,update_infoByName)){ System.out.println("\n修改成功！！\n"); }else{ System.out.println("\n修改失敗！！\n"); } }else{ System.out.println("該學號的學生資訊已存在！！！ 請重新新增！！"); } }else{ System.out.println("\n沒有該學號的學生資訊！！請重新選擇！\n"); } break; //刪除學生資訊(根據學號刪除) case 4: System.out.println("<---你已進入刪除學生資訊(根據學號刪除)介面--->"); int delete_id=getInputIntInfo("請輸入學號"); if(Handle.selectStuId(delete_id)){ if(Handle.deleteInfoById(delete_id)){ System.out.println("\n刪除成功！！！\n"); }else{ System.out.println("\n刪除失敗！！！\n"); } }else{ System.out.println("\n沒有該學號的學生資訊！！請重新選擇！\n"); } break; //刪除學生資訊(根據姓名刪除) case 5: System.out.println("<---你已進入刪除學生資訊(根絕姓名刪除)介面--->"); String delete_name=getInputStringInfo("請輸入姓名"); if(Handle.selectStuName(delete_name)){ if(Handle.deleteInfoByName(delete_name)){ System.out.println("\n刪除成功！！！\n"); }else{ System.out.println("\n刪除失敗！！！\n"); } }else{ System.out.println("\n沒有該學生的資訊！！請重新選擇！\n"); } break; //查詢所有學生資訊 case 6: System.out.println("<---你已進入所有學生資訊介面--->"); Handle.selectAllInfo(); break; //查詢學生資訊介面(根據學號查詢) case 7: System.out.println("<---你已進入查詢學生資訊介面(根據學號查詢)--->"); int select_id=getInputIntInfo("請輸入學號"); if(Handle.selectStuId(select_id)){ Info id=Handle.selectInfoById(select_id); if(id!=null){ } }else{ System.out.println("\n沒有該學生資訊！！請重新選擇！\n"); } break; //查詢學生資訊介面(根據姓名查詢) case 8: System.out.println("<---你已進入查詢學生資訊介面(根據姓名查詢)--->"); String select_name=getInputStringInfo("請輸入姓名"); if(Handle.selectStuName(select_name)){ Info name=Handle.selectInfoByName(select_name); if(name!=null){ } }else{ System.out.println("\n沒有該學生資訊！！請重新選擇！\n"); } break; //退出系統 case 9:System.out.println("退出成功！"); System.exit(0); break; default: System.out.println("沒有該選項！！請重新輸入！"); break; } } //給 Info類的學生屬性進行賦值 private Info getStudentInfo(){ Info info=new Info(); info.setStu_id(getInputIntInfo("請輸入學號")); info.setStu_name(getInputStringInfo("請輸入姓名")); info.setStu_sex(getInputStringInfo("請輸入性別")); info.setStu_age(getInputIntInfo("請輸入年齡")); info.setChinese(getInputIntInfo("請輸入語文成績")); info.setMath(getInputIntInfo("請輸入數學成績")); info.setEnglish(getInputIntInfo("請輸入英語成績")); info.setStu_address(getInputStringInfo("請輸入地址")); info.getAvgScose(); info.getSunScose(); return info; } } import java.util.ArrayList; public class Handle { private static ArrayList list=new ArrayList(); //新增學生資訊 public static boolean AddInfo(Info add_info) { boolean add=false; add=list.add(add_info); return add; } //根據學號修改學生資訊 public static boolean updateInfoById(int id, Info update_infoById) { boolean update=false; for(Object obj:list){ Info info=(Info)obj; if(id==info.getStu_id()){ list.set(list.indexOf(info), update_infoById); update=true; break; } } return update; } //根據姓名修改學生資訊 public static boolean updateInfoByName(String name, Info update_infoByName) { boolean update=false; for(Object obj:list){ Info info=(Info)obj; if(name.equals(info.getStu_name())){ list.set(list.indexOf(info), update_infoByName); update=true; break; } } return update; } //根據學號刪除學生資訊 public static boolean deleteInfoById(int delete_id) { boolean delete=false; for(Object obj:list){ Info info=(Info)obj; if(delete_id==info.getStu_id()){ delete=list.remove(info); break; } } return delete; } //根據姓名刪除資訊 public static boolean deleteInfoByName(String delete_name) { boolean delete=false; for(Object obj:list){ Info info=(Info)obj; if(delete_name.equals(info.getStu_name())){ delete=list.remove(info); break; } } return delete; } //查詢所有學生資訊 public static void selectAllInfo() { for(Object obj:list){ Info info=(Info)obj; StringBuilder stringBuilder=new StringBuilder(); stringBuilder.append("學號:"+info.getStu_id()); stringBuilder.append("\t姓名:"+info.getStu_name()); stringBuilder.append("\t性別:"+info.getStu_sex()); stringBuilder.append("\t年齡:"+info.getStu_age()); stringBuilder.append("\n語文成績:"+info.getChinese()); stringBuilder.append("\t數學成績:"+info.getMath()); stringBuilder.append("\t英語成績:"+info.getEnglish()); stringBuilder.append("\t平均成績:"+info.getAvgScose()); stringBuilder.append("\t總成績:"+info.getSunScose()); stringBuilder.append("\n地址:"+info.getStu_address()+"\n"); System.out.println(stringBuilder.toString()); } } //根據學號查詢資訊 public static Info selectInfoById(int select_id) { Info in=null; for(Object obj:list){ Info info=(Info)obj; if(select_id==info.getStu_id()){ System.out.println("\n該學生資訊如下:\n"); StringBuilder stringBuilder=new StringBuilder();//同上 stringBuilder.append("學號:"+info.getStu_id()); stringBuilder.append("\t姓名:"+info.getStu_name()); stringBuilder.append("\t性別:"+info.getStu_sex()); stringBuilder.append("\t年齡:"+info.getStu_age()); stringBuilder.append("\n語文成績:"+info.getChinese()); stringBuilder.append("\t數學成績:"+info.getMath()); stringBuilder.append("\t英語成績:"+info.getEnglish()); stringBuilder.append("\t平均成績:"+info.getAvgScose()); stringBuilder.append("\t總成績:"+info.getSunScose()); stringBuilder.append("\n地址:"+info.getStu_address()+"\n"); System.out.println(stringBuilder.toString()); in=info; } } return in; } //根據姓名查詢資訊 public static Info selectInfoByName(String select_name) { Info in=null; for(Object obj:list){ Info info=(Info)obj; if(select_name.equals(info.getStu_name())){ StringBuilder stringBuilder=new StringBuilder(); stringBuilder.append("學號:"+info.getStu_id()); stringBuilder.append("\t姓名:"+info.getStu_name()); stringBuilder.append("\t性別:"+info.getStu_sex()); stringBuilder.append("\t年齡:"+info.getStu_age()); stringBuilder.append("\n語文成績:"+info.getChinese()); stringBuilder.append("\t數學成績:"+info.getMath()); stringBuilder.append("\t英語成績:"+info.getEnglish()); stringBuilder.append("\t平均成績:"+info.getAvgScose()); stringBuilder.append("\t總成績:"+info.getSunScose()); stringBuilder.append("\n地址:"+info.getStu_address()+"\n"); System.out.println(stringBuilder.toString()); in=info; } } return in; } //得到學號 public static boolean selectStuId(int id) { boolean fag=false; for(Object obj:list){ Info info=(Info)obj; if(id==info.getStu_id()){ fag=true; break; } } return fag; } //得到姓名 public static boolean selectStuName(String name){ boolean fag=false; for(Object obj:list){ Info info=(Info)obj; if(name.equals(info.getStu_name())){ fag=true; break; } } return fag; } } public class TestMemo { public static void main(String[] args) { ChooseDemo ch=new ChooseDemo(); while(true){ ch.menu(); int choose=ch.getInputIntInfo("<請輸入數字選擇操作>"); ch.Choose(choose); } } }