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DVD迷你管理系统

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DVD迷你管理系统

功能菜单

思路:

  • 首先得有一个放置DVD专辑的容器。(创建DVD对象类放置DVD专辑)
  • 创建菜单
  • 实现6大功能
  • 新增功能
  • 查看功能(遍历)
  • 删除功能
  • 借出功能
  • 归还功能
  • 查看热榜

第一步,创建DVD对象类

public class Dvd {private String dvdname;//dvd名字private String state ;dvd的状态private String date ; //借出的日期private int time ;  //借出的次数public Dvd(){super();}public Dvd(String dvdname, String state, String date, int time) {super();this.dvdname = dvdname;this.state = state;this.date = date;this.time = time;}/**加\t是为了打印时整齐*/@Overridepublic String toString() {return state+"\t"+dvdname+"\t"+date+"\t"+time+"次";}public String getDvdname() {return dvdname;}public void setDvdname(String dvdname) {this.dvdname = dvdname;}public String getState() {return state;}public void setState(String state) {this.state = state;}public String getDate() {return date;}public void setDate(String date) {this.date = date;}public int getTime() {return time;}public void setTime(int time) {this.time = time;}
}

第二步、创建对象数组(容器)

//需要使用的包
//使用Shift+Alt+o快速导包
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Scanner;
/**也可以这样调包import java.util.*;import java.text.*;*/
//以下代码均写在同一类内
//我的类名是
public class DvdDX{Dvd [] dvd = new Dvd [6]; //新建对象数组总共有6张DVD......//后续

最多能够存储6张DVD

//初始化数组 null值时加\t为了打印时能够对其,后续判断是也需要+"\t"
public void init (){dvd[0]= new Dvd ("西游记","可借",null+"\t",0);dvd[1]= new Dvd ("亮剑","已借出","2018-01-02",2);dvd[2]= new Dvd ("封神榜","已借出","2018-07-01",1);}

第三步、创建菜单方法

/** 菜单*/ public void menu(){while (true){System.out.println("欢迎使用迷你DVD管理器");System.out.println("---------------------------------");System.out.println("1.新增DVD");System.out.println("2.查看DVD");System.out.println("3.删除DVD");System.out.println("4.借出DVD");System.out.println("5.归还DVD");System.out.println("6.查看热榜");System.out.println("0.退出");System.out.println("---------------------------------");System.out.print("请选择:");if (input.hasNextInt()){int check = input.nextInt();switch (check){case 1:System.out.println("---------->新增DVD");add();fanhui();break;case 2:System.out.println("---------->查看DVD");see ();fanhui();break;case 3:System.out.println("---------->删除DVD");del();fanhui();break;case 4:System.out.println("---------->借出DVD");borrow();fanhui();break;case 5:System.out.println("---------->归还DVD");still ();   fanhui();break;case 6:System.out.println("---------->排行榜");rankings();fanhui();break;case 0:exit();break;default :System.out.println("输入的项目不存在,请重新输入!");}}else {System.out.println("输入错误,请重新输入10以内的整数!");input =  new Scanner(System.in);}           }       }/** 返回方法* 让用户使用时更加人性化*/public void fanhui(){   System.out.println("*****************");System.out.println("请输入任意字符返回");input.next();}

第四步 、实现各个功能

    /** 1.新增DVD* (无法添加重复DVD)* (最多存在6张DVD)*/public void add (){/** 查询空位*/boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i]==null){check = true;break;}ceek ++;}if(check){System.out.print("请输入您需要添加的DVD名字:");String name = input.next();/** 防止重名DVD添加*/boolean repeat = true; for (int i = 0 ; i<dvd.length ;i++){if(dvd[i]==null){break;}if(name.equals(dvd[i].getDvdname())){repeat = false;break;}}if(repeat){dvd[ceek] = new Dvd(name,"可借",null+"\t",0);System.out.println("新增《"+name+"》DVD成功!!");}else{System.out.println("已存在该DVD,请勿重复添加。");}   }else {System.out.println("无法添加,DVD空间不足!!!");}       }/** 2.查看DVD* (列出所有DVD)*/public void see (){for(int i=0;i<menu.length;i++){System.out.print(menu[i]);}System.out.println();for (int i = 0 ; i <dvd.length ; i++    ){if(dvd[i]!=null){System.out.println((i+1)+"\t"+dvd[i]);}}}/** 3.删除DVD* (无法删除已借出DVD)*/public void del(){System.out.println("请输入您需要删除DVD的名字:");String name = input.next();boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i] != null && name.equals(dvd[i].getDvdname())){check = true;break;}ceek ++;}if(check == true && (dvd[ceek].getState() ).equals("可借")){if (ceek <dvd.length-1){for (int i = ceek ;i<dvd.length-1 ;i++){dvd[i]=dvd[i+1];}dvd[dvd.length-1 ]=null;}else {dvd[ceek]=null;}System.out.println("删除《"+name+"》成功!!");}else if(check == false){System.out.println("删除失败,未找到DVD!!!");}else {System.out.println("删除失败,该DVD已借出!");}}/** 4.借出DVD* (已借出DVD无法再借)*/public void borrow(){System.out.println("请输入您需要借出DVD的名字:");String name = input.next();boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i] != null && name.equals(dvd[i].getDvdname())){check = true;break;}ceek ++;}if(check == true && (dvd[ceek].getState() ).equals("可借") ){dvd[ceek].setState("已借出");/** 记录当前日期*/Date now = new Date();SimpleDateFormat sdf =new SimpleDateFormat("yyyy-MM-dd");String time = sdf.format(now);dvd[ceek].setDate(time);dvd[ceek].setTime(dvd[ceek].getTime()+1);System.out.println("借出《"+name+"》DVD成功!\n每天收费1元");}else if(check == false){System.out.println("租借失败,未找到DVD!!!");}else {System.out.println("租借失败,该DVD已借出!请归还后再借。");}}/** 5.归还DVD* (无法归还未借出的DVD)* (金额最低为1元)*/public void still (){System.out.println("请输入您需要归还DVD的名字:");String name = input.next();boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i] != null && name.equals(dvd[i].getDvdname())){check = true;break;}ceek ++;}if(check == true && (dvd[ceek].getState() ).equals("已借出")){dvd[ceek].setState("可借");int day =0;Date now = new Date();SimpleDateFormat sdf =new SimpleDateFormat("yyyy-MM-dd");String time = sdf.format(now);String date1 =dvd[ceek].getDate(); //借出时间String date2 =time; //现在的时间//对日期时间进行格式化的类SimpleDateFormat asd =new SimpleDateFormat("yyyy-MM-dd");//将String转成Date类型try {Date time1 = asd.parse(date1); //需要计算的日期Date time2 = asd.parse(date2); //今天日期long haoMiao1 = time1.getTime(); //转成毫秒long haoMiao2 = time2.getTime();long jianGeHM = haoMiao2-haoMiao1;day = (int)(jianGeHM/(24*60*60*1000)+1);
//              System.out.println("共借出:"+day+"天");             } catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}dvd[ceek].setDate(null+"\t");System.out.println("归还《"+name+"》成功!!");System.out.println("共借出"+day+"天");System.out.println("借书费用为:"+Arrays.asList(day)+"元");}else if(check == false){System.out.println("归还失败,未找到DVD!!!");}else {System.out.println("归还失败,该DVD未借出!");}}/** 6.查看排行* (按借出次数来降序,并更新顺序)*/public void rankings(){for (int i = 0 ; i< dvd.length-1 ; i++) {if(dvd[i+1]!= null &&dvd[i]!= null && (dvd[i].getTime() < dvd[i+1].getTime())){Dvd d = new Dvd(); d = dvd[i];dvd[i] =  dvd[i+1];dvd[i+1] = d;}}see();}/** 0.退出DVD*/public void exit(){System.out.println("*********************************");System.out.println("------------感谢您的使用-------------");System.out.println("*********************************");System.exit(0);//让JVM停止运行,结束程序。}
}//结束DvdDX类

最后一步、编写测试类调用菜单

public class Test{public static void main(String[] args) {DvdDX  st = new DvdDX ();st.init(); //调用初始化st.menu(); //进入菜单}
}

DVD迷你管理系统

功能菜单

思路:

  • 首先得有一个放置DVD专辑的容器。(创建DVD对象类放置DVD专辑)
  • 创建菜单
  • 实现6大功能
  • 新增功能
  • 查看功能(遍历)
  • 删除功能
  • 借出功能
  • 归还功能
  • 查看热榜

第一步,创建DVD对象类

public class Dvd {private String dvdname;//dvd名字private String state ;dvd的状态private String date ; //借出的日期private int time ;  //借出的次数public Dvd(){super();}public Dvd(String dvdname, String state, String date, int time) {super();this.dvdname = dvdname;this.state = state;this.date = date;this.time = time;}/**加\t是为了打印时整齐*/@Overridepublic String toString() {return state+"\t"+dvdname+"\t"+date+"\t"+time+"次";}public String getDvdname() {return dvdname;}public void setDvdname(String dvdname) {this.dvdname = dvdname;}public String getState() {return state;}public void setState(String state) {this.state = state;}public String getDate() {return date;}public void setDate(String date) {this.date = date;}public int getTime() {return time;}public void setTime(int time) {this.time = time;}
}

第二步、创建对象数组(容器)

//需要使用的包
//使用Shift+Alt+o快速导包
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Scanner;
/**也可以这样调包import java.util.*;import java.text.*;*/
//以下代码均写在同一类内
//我的类名是
public class DvdDX{Dvd [] dvd = new Dvd [6]; //新建对象数组总共有6张DVD......//后续

最多能够存储6张DVD

//初始化数组 null值时加\t为了打印时能够对其,后续判断是也需要+"\t"
public void init (){dvd[0]= new Dvd ("西游记","可借",null+"\t",0);dvd[1]= new Dvd ("亮剑","已借出","2018-01-02",2);dvd[2]= new Dvd ("封神榜","已借出","2018-07-01",1);}

第三步、创建菜单方法

/** 菜单*/ public void menu(){while (true){System.out.println("欢迎使用迷你DVD管理器");System.out.println("---------------------------------");System.out.println("1.新增DVD");System.out.println("2.查看DVD");System.out.println("3.删除DVD");System.out.println("4.借出DVD");System.out.println("5.归还DVD");System.out.println("6.查看热榜");System.out.println("0.退出");System.out.println("---------------------------------");System.out.print("请选择:");if (input.hasNextInt()){int check = input.nextInt();switch (check){case 1:System.out.println("---------->新增DVD");add();fanhui();break;case 2:System.out.println("---------->查看DVD");see ();fanhui();break;case 3:System.out.println("---------->删除DVD");del();fanhui();break;case 4:System.out.println("---------->借出DVD");borrow();fanhui();break;case 5:System.out.println("---------->归还DVD");still ();   fanhui();break;case 6:System.out.println("---------->排行榜");rankings();fanhui();break;case 0:exit();break;default :System.out.println("输入的项目不存在,请重新输入!");}}else {System.out.println("输入错误,请重新输入10以内的整数!");input =  new Scanner(System.in);}           }       }/** 返回方法* 让用户使用时更加人性化*/public void fanhui(){   System.out.println("*****************");System.out.println("请输入任意字符返回");input.next();}

第四步 、实现各个功能

    /** 1.新增DVD* (无法添加重复DVD)* (最多存在6张DVD)*/public void add (){/** 查询空位*/boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i]==null){check = true;break;}ceek ++;}if(check){System.out.print("请输入您需要添加的DVD名字:");String name = input.next();/** 防止重名DVD添加*/boolean repeat = true; for (int i = 0 ; i<dvd.length ;i++){if(dvd[i]==null){break;}if(name.equals(dvd[i].getDvdname())){repeat = false;break;}}if(repeat){dvd[ceek] = new Dvd(name,"可借",null+"\t",0);System.out.println("新增《"+name+"》DVD成功!!");}else{System.out.println("已存在该DVD,请勿重复添加。");}   }else {System.out.println("无法添加,DVD空间不足!!!");}       }/** 2.查看DVD* (列出所有DVD)*/public void see (){for(int i=0;i<menu.length;i++){System.out.print(menu[i]);}System.out.println();for (int i = 0 ; i <dvd.length ; i++    ){if(dvd[i]!=null){System.out.println((i+1)+"\t"+dvd[i]);}}}/** 3.删除DVD* (无法删除已借出DVD)*/public void del(){System.out.println("请输入您需要删除DVD的名字:");String name = input.next();boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i] != null && name.equals(dvd[i].getDvdname())){check = true;break;}ceek ++;}if(check == true && (dvd[ceek].getState() ).equals("可借")){if (ceek <dvd.length-1){for (int i = ceek ;i<dvd.length-1 ;i++){dvd[i]=dvd[i+1];}dvd[dvd.length-1 ]=null;}else {dvd[ceek]=null;}System.out.println("删除《"+name+"》成功!!");}else if(check == false){System.out.println("删除失败,未找到DVD!!!");}else {System.out.println("删除失败,该DVD已借出!");}}/** 4.借出DVD* (已借出DVD无法再借)*/public void borrow(){System.out.println("请输入您需要借出DVD的名字:");String name = input.next();boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i] != null && name.equals(dvd[i].getDvdname())){check = true;break;}ceek ++;}if(check == true && (dvd[ceek].getState() ).equals("可借") ){dvd[ceek].setState("已借出");/** 记录当前日期*/Date now = new Date();SimpleDateFormat sdf =new SimpleDateFormat("yyyy-MM-dd");String time = sdf.format(now);dvd[ceek].setDate(time);dvd[ceek].setTime(dvd[ceek].getTime()+1);System.out.println("借出《"+name+"》DVD成功!\n每天收费1元");}else if(check == false){System.out.println("租借失败,未找到DVD!!!");}else {System.out.println("租借失败,该DVD已借出!请归还后再借。");}}/** 5.归还DVD* (无法归还未借出的DVD)* (金额最低为1元)*/public void still (){System.out.println("请输入您需要归还DVD的名字:");String name = input.next();boolean check = false;int ceek = 0;for (int i=0 ;i<dvd.length;i++){if (dvd[i] != null && name.equals(dvd[i].getDvdname())){check = true;break;}ceek ++;}if(check == true && (dvd[ceek].getState() ).equals("已借出")){dvd[ceek].setState("可借");int day =0;Date now = new Date();SimpleDateFormat sdf =new SimpleDateFormat("yyyy-MM-dd");String time = sdf.format(now);String date1 =dvd[ceek].getDate(); //借出时间String date2 =time; //现在的时间//对日期时间进行格式化的类SimpleDateFormat asd =new SimpleDateFormat("yyyy-MM-dd");//将String转成Date类型try {Date time1 = asd.parse(date1); //需要计算的日期Date time2 = asd.parse(date2); //今天日期long haoMiao1 = time1.getTime(); //转成毫秒long haoMiao2 = time2.getTime();long jianGeHM = haoMiao2-haoMiao1;day = (int)(jianGeHM/(24*60*60*1000)+1);
//              System.out.println("共借出:"+day+"天");             } catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}dvd[ceek].setDate(null+"\t");System.out.println("归还《"+name+"》成功!!");System.out.println("共借出"+day+"天");System.out.println("借书费用为:"+Arrays.asList(day)+"元");}else if(check == false){System.out.println("归还失败,未找到DVD!!!");}else {System.out.println("归还失败,该DVD未借出!");}}/** 6.查看排行* (按借出次数来降序,并更新顺序)*/public void rankings(){for (int i = 0 ; i< dvd.length-1 ; i++) {if(dvd[i+1]!= null &&dvd[i]!= null && (dvd[i].getTime() < dvd[i+1].getTime())){Dvd d = new Dvd(); d = dvd[i];dvd[i] =  dvd[i+1];dvd[i+1] = d;}}see();}/** 0.退出DVD*/public void exit(){System.out.println("*********************************");System.out.println("------------感谢您的使用-------------");System.out.println("*********************************");System.exit(0);//让JVM停止运行,结束程序。}
}//结束DvdDX类

最后一步、编写测试类调用菜单

public class Test{public static void main(String[] args) {DvdDX  st = new DvdDX ();st.init(); //调用初始化st.menu(); //进入菜单}
}

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