JAVA实验六 输入输出流

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package experiment;
import java.io.*;
public class SecretExample {
public static void main(String a[])
{
File fileone=new File("E:\eplicse-workspace\experiment\src\experiment\hello.txt");
File filetwo=new File("E:\eplicse-workspace\experiment\src\experiment\hello.secret");
char b[]=new char[100];
try {
FileReader in=new FileReader(fileone);//【代码1】创建指向fileone的字符输入流
FileWriter out=new FileWriter(filetwo);//【代码2】创建指向filetwo的字符输出流
int n=-1;
while((n=in.read(b))!=-1)
{
for(int i=0;i<n;i++)
{
b[i]=(char)(b[i]^'a');
}
out.write(b,0,n);//【代码3】out 将数组 b 的前 n 单元写到文件
}
out.close();//【代码 4】out 关闭
in=new FileReader(filetwo);//【代码5】创建指向filetwo的字符输入流
System.out.println("加密后的文件内容：");
n=in.read(b);
while(n!=-1)
{
String str=new String(b,0,n);
System.out.println("dfjakfjd"+str);
n=in.read(b);
}
in=new FileReader(filetwo);
System.out.println("解密后的文件内容：");
while((n=in.read(b))!=-1)
{
for(int i=0;i<n;i++)
{
b[i]=(char)(b[i]^'a');
}
String str=new String(b,0,n);
System.out.println(str);
}
in.close();//【代码 6】in 关闭
}
catch(IOException e)
{
System.out.println(e);
}
}
}

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package experiment;
import java.io.*;
import java.util.*;
class Student1
implements Serializable
{
private String sno;
private String name;
private String dep;
private String class1;
private String address;
Student1(String s,String na,String d,String c,String a)
{
sno=s;name=na;dep=d;class1=c;address=a;
}
public String toString()
{
return "学号："+sno+"tt姓名："+name+"tt专业："+dep+"tt班级："+class1+"tt地址："+address;
}
}
public class Main62 {
public static void main(String a[])
{
//写入myfile1.txt
String sno,name,dep,class1,address;
Student1 stu[]=new Student1[999];
int i=0;
Scanner scan=new Scanner(System.in);
FileOutputStream fout;
ObjectOutputStream objout;
System.out.println("请输入学生的学号、姓名、专业、班级和地址，输入bye结束程序");
try {
fout=new FileOutputStream("E:\myfile1.txt");
objout=new ObjectOutputStream(fout);
while(true)
{
sno=scan.next();
if(sno.equals("bye"))break;
name=scan.next();
dep=scan.next();
class1=scan.next();
address=scan.next();
stu[i]=new Student1(sno,name,dep,class1,address);
objout.writeObject(stu[i]);
i++;
}
objout.close();
fout.close();
}
catch(Exception e)
{
System.out.println(e);
System.exit(0);
}
//输出myfile1.txt内容
try{
FileInputStream fin=new FileInputStream("E:\myfile1.txt");
ObjectInputStream objin=new ObjectInputStream(fin);
System.out.println("ttt学生信息表myfile1");
while(true)
{
try{
System.out.println( objin.readObject());
}
catch(EOFException e)
{
break;
}
}
objin.close();
fin.close();
}
catch(Exception e )
{
System.out.println(e);
}
//将myfile1.txt的内容复制到myfile2.txt
try{
FileOutputStream fout1=new FileOutputStream("E:\myfile2.txt");
ObjectOutputStream objout1=new ObjectOutputStream(fout1);
FileInputStream fin2=new FileInputStream("E:\myfile1.txt");
ObjectInputStream objin2=new ObjectInputStream(fin2);
while(true)
{
try{
objout1.writeObject(objin2.readObject());
}
catch(EOFException e)
{
break;
}
}
objin2.close();
fin2.close();
objout1.close();
fout1.close();
}
catch(Exception e )
{
System.out.println(e);
}
//输出myfile2.txt内容
try{
FileInputStream fin=new FileInputStream("E:\myfile2.txt");
ObjectInputStream objin=new ObjectInputStream(fin);
System.out.println("nttt学生信息表myfile2");
while(true)
{
try{
System.out.println( objin.readObject());
}
catch(EOFException e)
{
break;
}
}
objin.close();
fin.close();
}
catch(Exception e )
{
System.out.println(e);
}
}
}