import java.io.*;
public class Book {
static int a,b,c,d,e;
static String f;
public static void main(String[] args) throws IOException,
ClassNotFoundException {
Content();
}
public static void Content() throws IOException,
ClassNotFoundException {
BufferedReader sd=new BufferedReader(new
InputStreamReader(System.in));
System.out.println(" 图书管理系统 ");
System.out.println("********1.信息录入********");
System.out.println("********2.信息修改********");
System.out.println("********3.信息删除********");
System.out.println("********4.信息查询********");
System.out.println("请选择序号（1-4）：");
f=sd.readLine();
a=Integer.parseInt(f);
d(a);
}
public static void d(int a) throws IOException,
ClassNotFoundException{
BookMessage bo=new BookMessage();
ReaderMessage re=new ReaderMessage();
BorrowMessage br=new BorrowMessage();
Find fa=new Find();
Modify mo=new Modify();
Delete dt=new Delete();
switch(a) {
case 1:{
System.out.println("****1.录入图书信息****");
System.out.println("****2.录入读者信息****");
System.out.println("****3.录入借阅信息****");
System.out.println("请选择序号（1-3）：");
BufferedReader sa=new BufferedReader(new
InputStreamReader(System.in));
b=sa.read()-48;
switch(b) {
case 1:{
bo.bookInput();
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