DVD.rar_DVDjava_java编写DVD

import java.text.SimpleDateFormat; import java.util.Scanner; import com.sun.org.apache.xerces.internal.impl.xpath.regex.ParseException; public class DVDMag { DVDSet dvd = new DVDSet(); Scanner input = new Scanner(System.in); // 初始化3张dDVD信息 public void initial() { dvd.name[0] = "罗马假日"; dvd.state[0] = 0; dvd.count[0]=15;//借出第一张DVD次数 dvd.data[0] = "2010-07-01"; dvd.name[1] = "风声鹤唳"; dvd.state[1] = 1; dvd.count[1]=12; dvd.name[2] = "浪漫满屋"; dvd.state[2] = 1; dvd.count[2]=30; } /** * 主菜单 * */ public void startMenu() { System.out.println("欢迎使用迷你DVD管理系统"); System.out.println("-------------------------------"); System.out .println("0.退出排行榜\n1.新增DVD\n2.查看DVD\n3.删除DVD\n4.借出DVD\n5.归还DVD\n6.退 出\n"); System.out.println("---------------------------------"); System.out.println("请选择:"); int choice = input.nextInt(); //实现菜单切换 switch (choice) { case 0: list();// 排行榜 returnMain();// 返回主菜单 break; case 1: add();//新增 returnMain(); break; case 2: search();//查看 returnMain(); break; case 3: delete();//删除 returnMain(); break; case 4: lend();//借出 returnMain(); break; case 5: returnDvd(); returnMain(); break; case 6: System.out.println("谢谢使用!"); break; default: System.out.println("请输入正确的数字:"); returnMain(); break; } } /** * 实现返回主菜单 * */ public void returnMain() { System.out.println("*********************************"); System.out.println("输入0返回："); if (input.nextInt() == 0) { startMenu(); } else { System.out.println("输入错误，异常终止！"); } } /** * 实现查看DVD主菜单 * */ public void search() { System.out.println("--->查看DVD\n"); System.out.println("序号"+"\t状态\t"+"名称"+"\t\t"+"借出时间"); for (int i = 0; i < dvd.name.length; i++) { if (dvd.name[i] == null) { break; } else if (dvd.state[i] == 0) { System.out.println((i + 1) + "\t已借出" + "<<" + dvd.name[i] + ">>\t" + dvd.data[i]); } else if (dvd.state[i] == 1) { System.out.println((i + 1) + "\t可借\t" + "<<" + dvd.name[i] + ">>"); } } } /** * 实现新增DVD信息 * */ public void add(){ System.out.println("--->新增DVD"); for(int i=0;i<dvd.name.length;i++){ if(dvd.name[i]==null){ dvd.state[i]=1;//新增为可借状态 System.out.println("请输入DVD名称:"); dvd.name[i]=input.next(); System.out.println("新增<<"+dvd.name[i]+">>成功!"); break; } } } //删除DVD信息 public void delete() { System.out.println("-->删除DVD"); boolean flag; System.out.println("请输入DVD名称:"); String name = input.next(); for (int i = 0; i < dvd.name.length; i++) { if (dvd.name[i] != null && dvd.name[i].equalsIgnoreCase(name) && dvd.state[i] == 1) { int j = i; while (dvd.name[j + 1] != null) { dvd.name[j] = dvd.name[j + 1]; dvd.state[j] = dvd.state[j + 1]; dvd.data[j] = dvd.data[j + 1]; j++; } // 最后一个不为空的元素置空 dvd.name[j] = null; dvd.data[j] = null; System.out.println("删除《" + name + "》成功"); flag = true; break; } else if (dvd.name[i] != null && dvd.name[i].equalsIgnoreCase(name) && dvd.state[i] == 0) { System.out.println("《" + name + "》为借出状态，不能删除！"); flag = true; break; } } } /** * 实现DVD的业务处理 * */ public void lend() { System.out.println("-->借出DVD"); System.out.println("请输入DVD名称:"); String want = input.next(); for (int i = 0; i < dvd.name.length; i++) { if (dvd.name[i] == null) { System.out.println("没有找到匹配信息！"); break; } else if (dvd.name.equals(want) && dvd.state[i] == 1) { System.out.println("找到匹配可借！"); break; } else if (dvd.name[i].equals(want) && dvd.state[i] == 0) { System.out.println("找到匹配信息已被借出！"); } } } public void returnDvd() { /** * 计算日期差 * * @param dstr1 * 第一个日期 * @Param dstr2 * 第二个日期 @ return charge 日期差 */ System.out.println("归还DVD\n"); System.out.println("请输入DVD名称:"); String name=input.next(); System.out.println("归还日期(-年-月-日)为："); String data=input.next(); //遍历数组查找 for(int i=0;i<dvd.name.length;i++){ if(dvd.name[i]!=null&&name.equalsIgnoreCase(dvd.name[i])&&dvd.state[i]==0){ System.out.println("归还<<"+name+">>成功!"); dvd.state[i]=1;//归还后可在被借出 System.out.println("接触日期:"+dvd.data[i]); System.out.println("归还日期:"+data); try { System.out.println("应付租金(元)"+charge(dvd.data[i],data+"\n")); } catch (java.text.ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } break; }else if(dvd.name[i]==null){ System.out.println("归还失败!"); break; } } } public long charge(String dstr1, String dstr2) throws java.text.ParseException { long charge = 0; SimpleDateFormat sd = new SimpleDateFormat("YYYY-MM-dd"); try { java.util.Date d1 = sd.parse(dstr1); java.util.Date d2 = sd.parse(dstr2); charge = (d2.getTime() - d1.getTime()) / (24 * 60 * 60 * 1000); } catch (ParseException e) { e.printStackTrace(); } return charge; } /** * 实现借出排行榜 * */ public void list() { System.out.println("--->排行榜\n"); System.out.println("************************************"); System.out.println("次数" + "名称"); int[] newcount = new int[50];// 创建新数组 String[] newname = new String[50]; for (int i = 0; i < dvd.count.length; i++) { newcount[i] = dvd.count[i];// 把count赋值给新数组 newname[i] = dvd.name[i];// 把name赋值给新数组 } /** * 排序 */ for (int i = 0; i < newname.length; i++) {// 比较数组中每个元素的借出次数 for (int j = i + 1; j < newname.length - 1; j++) { if (newcount[j] > newcount[i]) {// 如果借出的多,排序靠前 // 根据借出的次数交换位置 int temp = newcount[i]; newcount[i] = newcount[j]; newcount[j] = temp; // 交换DVD名称位置 String remp = newname[i]; newname[i] = newname[j]; newname[j] = remp; } } } /** * 输出排行榜 */ for(int i=0;i<newcount.length;i++){ if(newname[i]==null){ break; }else{ System.out.println(newcount[i]+"\t<<"+newname[i]+">>"); } } } }