java单链表怎么实现书籍管理系统

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书籍管理系统功能:

1).添加图书
2).删除图书
3).查看图书
4).修改书籍
5).修改排序方式
6).模糊查询
7).退出程序

代码实现:

Book类

package com.bookmanagement.book;public class Book {//书类 public String no; public String name; public int price; public String type; public Book next;  public Book(String Bno,String Bname,int Bprive,String Btype) {  this.no=Bno;  this.name=Bname;  this.price=Bprive;  this.type=Btype; } public Book() {   }  //toString方法 @Override public String toString() {  return "  Bookno=" + no + ",  Bookname=" + name + ",  Bookprice=" + price + ", Booktype=" + type; }  }

1).添加图书

package com.bookmanagement.function;import java.util.Scanner;import com.bookmanagement.book.*;public class AddBook { static Scanner input = new Scanner(System.in); public static void addbook() {    System.out.println("请输入书编号:");  String no = input.next();  System.out.println("请输入书名字:");  String name = input.next();  System.out.println("请输入书价格:");  int price = input.nextInt();  System.out.println("请输入书类型:");  String type = input.next();  Book bo = new Book(no,name,price,type);  add(bo); } public static void add(Book bo) {  Book temp = Test.head;//把头节点赋值给一个辅助类  boolean falg = false;  while(true) {   if(temp.next == null) {//判断链表是否到最后    break;   }   if(Test.stroing %2 == 1) {//判断是否修改了显示顺序    if(temp.next.no.compareToIgnoreCase(bo.no)<0) {//寻找适合的位置插入节点//跳过头节点     break;    }else if(temp.next.no.compareToIgnoreCase(bo.no)==0){     falg = true;     break;    }   }else {    if(temp.next.no.compareToIgnoreCase(bo.no)>0) {//寻找适合的位置插入节点//跳过头节点     break;    }else if(temp.next.no.compareToIgnoreCase(bo.no)==0){     falg = true;     break;    }           }   //节点后移   temp = temp.next;  }  if(falg) {//判断是否输入相同的编号   System.out.println("插入"+bo.no+"的数据编号已存在");  }else {   bo.next = temp.next;   temp.next = bo;  }   } }

2).删除图书

package com.bookmanagement.function;import java.util.Scanner;import com.bookmanagement.book.*;public class DropBook { static Scanner input = new Scanner(System.in); public static void dropbook() {  System.out.println("请输入需要删除图书的编号:");  String no = input.next();  Book temp = Test.head;  boolean falg = false;  while(true) {   if(temp.next == null) {//判断链表是否到最后    break;   }   if(temp.next.no.compareToIgnoreCase(no)==0) {    falg = true;    break;   }   temp = temp.next;//temp位移  }  if(falg) {    temp.next=temp.next.next;//找到temp.next域指向删除的编号让下一个next覆盖    //如果需要删除的编号下一个next域指向的是null则temp.next域则下一个指向为空    System.out.println("删除成功");  }else {   System.out.println("没有找到该书籍");  }      }}

3).查看图书

package com.bookmanagement.function;import com.bookmanagement.book.*;public class ShowBook { public static void showbook() {  if(Test.head.next == null) {   System.out.println("没有书籍数据");   return;  }  Book temp = Test.head.next;//输出头节点下一个节点  int sum=0;  while(true) {   if(temp == null) {    break;   }   System.out.println(temp);   sum++;   temp = temp.next;//temp位移  }  System.out.println("书籍总数为:"+sum);   }}

4).修改书籍

package com.bookmanagement.function;import java.util.Scanner;import com.bookmanagement.book.*;public class Modify { static Scanner input = new Scanner(System.in); public static void modidy() {  System.out.println("请输入需要修改的图书的编号:");  String no = input.next();  Book temp = Test.head;  boolean ts = false;  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.no.compareToIgnoreCase(no)==0) {    ts = true;    break;   }   temp = temp.next;  }  if(ts) {   System.out.println("修改:1.名字 2.编号 3.价格 4.类型");   int falg = input.nextInt();   switch (falg) {   case 1:    System.out.println("请输入需要修改的名字:");    String name = input.next();    temp.next.name = name;    break;   case 2:    System.out.println("请输入需要修改的编号:");    String Mno = input.next();    temp.next.no = Mno;    Book change = temp.next;    temp.next=temp.next.next;    AddBook.add(change);    //重新调用add方法    break;   case 3:    System.out.println("请输入需要修改的价格:");    int prive = input.nextInt();    temp.next.price = prive;    break;   case 4:    System.out.println("请输入需要修改的类型:");    String type= input.next();    temp.next.type = type;    break;   default:System.out.println("输入有误");    break;   }  }else{   System.out.println("没有找到该书籍");  }  }}

5).修改排序方式

package com.bookmanagement.function;import java.util.Scanner;import com.bookmanagement.book.*;public class Flash { static Scanner input = new Scanner(System.in); public static void flashbook() {  Book everList = new Book("","",0,"");  Book temp = Test.head.next;//把有数据的赋值给辅助类  Book next = null;  if(temp.next == null) {//链表只有一个数据不需要排序   System.out.println("链表只有一个数据不需要逆序");   return;  }  while(temp != null) {   next = temp.next;   temp.next = everList.next;   everList.next = temp;   temp = next;  }  Test.head.next = everList.next;  if(Test.stroing%2==1) {   System.out.println("修改为降序");  }else {   System.out.println("修改为升序");  } }}

6).模糊查询

package com.bookmanagement.function;import com.bookmanagement.book.*;import java.util.Scanner;public class Detailed { static Scanner input = new Scanner(System.in); public static void detailed() {  System.out.println("功能:模糊查询");   detalied1(); } public static void detalied1() {  System.out.println("输入需要查找的数据:1.书名2.编号3.价格4.类型");  int falg = input.nextInt();  switch (falg) {  case 1:   DetaBookName();   break;  case 2:   DetaBookNo();   break;  case 3:   DetaBookPrice();   break;  case 4:   DetaBookType();   break;  default:   break;  } } public static void DetaBookName() {  System.out.println("请输入模糊书名:");  String name = input.next();  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");   return;  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.name.indexOf(name)==0) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有找到该书籍信息");  } } public static void DetaBookNo() {  System.out.println("请输入模糊编号:");  String no = input.next();  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");   return;  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.no.indexOf(no)==0) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有找到该书籍信息");  } } static int price; public static void DetaBookPrice() {  System.out.print("输入符号:(>,<,=,>=,<=,!=):");  String symbol = input.next();  System.out.print("输入价格:");  price = input.nextInt();  System.out.println();  switch (symbol) {  case ">":   GreaterPrice();   break;  case "<":   LessPrice();   break;  case "=":   EqualPrice();   break;  case ">=":   GreaterEqualePrice();   break;  case "<=":   LessEqualePrice();   break;  case "!=":   NotEquale();   break;  default:System.out.println("输入错误");   break;  } } public static void GreaterPrice() {  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.price>price) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有书籍符合信息");  } } public static void LessPrice() {  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.price=price) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有书籍符合信息");  } } public static void LessEqualePrice() {  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.price<=price) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有书籍符合信息");  } } public static void NotEquale() {  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.price!=price) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有书籍符合信息");  } } public static void DetaBookType() {  System.out.println("请输入模糊类型:");  String type = input.next();  Book temp = Test.head;  boolean falg = false;  if(Test.head.next == null) {   System.out.println("没有书籍信息");   return;  }  while(true) {   if(temp.next == null) {    break;   }   if(temp.next.type.indexOf(type)==0) {    System.out.println(temp.next);    falg = true;   }   temp = temp.next;  }  if(!falg) {   System.out.println("没有找到该书籍信息");  } } }

7).测试类

package com.bookmanagement.function;import java.util.Scanner;import com.bookmanagement.book.*;public class Test { static int stroing=0; public static Book head = new Book("","",0,"");//建立链表头 public static void main(String[] args) {  Scanner input = new Scanner(System.in);  System.out.println("-----欢迎进入图书管理系统-----");  boolean temp = true;  while(temp) {   System.out.println("1).添加图书");   System.out.println("2).删除图书");   System.out.println("3).查看图书");   System.out.println("4).修改书籍");   System.out.println("5).修改排序方式");   System.out.println("6).模糊查询");   System.out.println("7).退出程序");   int choose = input.nextInt();   switch (choose) {   case 1:    AddBook.addbook();//添加书籍    break;   case 2:    DropBook.dropbook();//删除书籍    break;   case 3:    ShowBook.showbook();//查看书籍    break;   case 4:    Modify.modidy();//修改书籍    break;   case 5:    stroing++;    Flash.flashbook();//修改排序方式    break;   case 6:    Detailed.detailed();//模糊查询    break;   case 7:    temp = false;//退出程序    break;   default:System.out.println("输入错误");    break;   }  }  System.out.println("程序退出,欢迎下次使用");  input.close(); }}

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