JavaSE编写简单的图书管理系统

package 图书管理系统;import java.util.Scanner;/*** @author 魏榕汘* @date 2020/9/25 - 20:06* 图书管理系统* 1.查看所有的图书* 2.增加图书* 3.删除图书* 4.借出图书* 5.归还图书* 6.退出** 1首先实现登陆的功能*2查看功能*/
public class Demo1 {//迷你图书管理系统static String[] nameArray={"java教程","python入门","c语言教程","ps大神之路"};//书名static String [] authorArray={"张三","李四","王五","赵柳"};//作者static int[] stateArray={1,1,2,2};//状态：1.可借 2.不可借static int[] borrowCount={67,70,43,15};//累计借出次数static Scanner sc=new Scanner(System.in);public static void showMenu(){System.out.println("欢迎来到图书管理系统！");System.out.println("---------主菜单---------");System.out.println("1.查看所有的图书");System.out.println("2.添加图书");System.out.println("3.删除图书");System.out.println("4.借出图书");System.out.println("5.归还图书");System.out.println("退出");System.out.println("请选择您要办理的业务：");}//删除图书public static void delBook(){System.out.println("请输入书名：");String name= sc.next();int index=0;int msg=1;for (int i=0;i<nameArray.length;i++){if (nameArray[i].equals(name)){index=i;msg=2;}}if (msg==2){String [] nameArray2=new String[nameArray.length-1];String [] authorArray2=new String[nameArray.length-1];int[] stateArray2=new int [nameArray.length-1];int[] borrowCount2=new int [nameArray.length-1];for (int i=0;i<nameArray2.length;i++){if (i<index){nameArray2[i]=nameArray[i];authorArray2[i]=authorArray[i];stateArray2[i]=stateArray[i];borrowCount2[i]=borrowCount[i];}else if (i>=index){nameArray2[i]=nameArray[i+1];authorArray2[i]=authorArray[i+1];stateArray2[i]=stateArray[i+1];borrowCount2[i]=borrowCount[i+1];}}showBooks(nameArray2,authorArray2,stateArray2,borrowCount2);System.out.println(name+"\t"+"书籍已经删除成功");}else{System.out.println("此书不存在");}}//借出图书public static void borrowBook(){System.out.println("请输入书名：");String name= sc.next();String msg="图书不存在";for (int i=0;i<nameArray.length;i++){if (nameArray[i].equals(name)){if (stateArray[i]==1){msg="图书可借";stateArray[i]=2;borrowCount[i]+=1;}else{msg="对不起，图书已经借出";}}}if (msg.equals("图书可借")){System.out.println(name+"借出成功");showBooks(nameArray,authorArray,stateArray,borrowCount);}else{System.out.println(msg);}}//显示所有图书public static void showBooks(String[] a,String[] b,int []c,int[] d){System.out.println("书名--------作者----状态----借出次数");for (int i=0;i<a.length;i++){String s="不可借";if (c[i]==1){s="可借";}System.out.println(a[i]+"----"+b[i]+"----"+s+"--------"+d[i]);}}//归还图书public static void backBook(){System.out.println("请输入书名：");String name= sc.next();String msg="图书不存在";for (int i=0;i<nameArray.length;i++){if (nameArray[i].equals(name)){if (stateArray[i]==2){msg="图书存在";System.out.println("请输入租借天数：");int days=sc.nextInt();if (days>31&&days<1){System.out.println("输入错误！");}else{stateArray[i]=1;System.out.println(name+"归还成功！");double rent=2.0*days;System.out.println(name+"归还成功！租金："+rent+"元");showBooks(nameArray,authorArray,stateArray,borrowCount);}}}}}//增加图书public static void addBook(){if (nameArray.length>=6){System.out.println("书架已经满了");}else{System.out.println("请输入书名：");String name= sc.next();System.out.println("请输入作者：");String author= sc.next();int msg1=1;for (String n:nameArray) {if (n.equals(name)){msg1=2;}}if (msg1==1){String []nameArray2=new String[nameArray.length+1];String []authorArray2=new String[nameArray.length+1];int  []stateArray2=new int [nameArray.length+1];int  []borrowCount2=new int [nameArray.length+1];for (int i=0;i<nameArray.length;i++){nameArray2[i]=nameArray[i];authorArray2[i]=authorArray[i];stateArray2[i]=stateArray[i];borrowCount2[i]=borrowCount[i];}nameArray2[nameArray2.length-1]=name;authorArray2[authorArray2.length-1]=author;stateArray2[stateArray2.length-1]=1;borrowCount2[borrowCount2.length-1]=0;System.out.println("添加成功，添加书名为："+name);showBooks(nameArray2,authorArray2,stateArray2,borrowCount2);}else{System.out.println("此书已经存在！");}}}public static String login(){String uname="aaa";String upwd="111";String msg="失败";System.out.println("请输入账号：");String name=sc.next();System.out.println("请输入密码：");String pwd=sc.next();if (uname.equals(name)&&upwd.equals(pwd)){msg="成功";}return msg;}public static void main(String[] args) {while (true){String msg=login();if ("失败".equals(msg)){System.out.println("登陆失败，请重新登陆！");continue;}else if("成功".equals(msg)){while (true) {showMenu();int chioce = sc.nextInt();if (chioce == 1) {showBooks(nameArray,authorArray,stateArray,borrowCount);} else if (chioce == 2) {addBook();} else if (chioce == 3) {delBook();} else if (chioce == 4) {borrowBook();} else if (chioce == 5) {backBook();} else if (chioce == 6) {}}}}}
}