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我正在写一个简单的程序,使用Vigenere密码对文本文件中的文本进行加密和解密。该大纲代码粘贴下面java流关闭错误
import java.io.*;
public class VigenereCipher
{
public static void main(String [] args)
throws IOException
{
char [][] cipherKey = new char[26][26];
String fileName, keyword;
System.out.println("Enter the file Name to Read");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
fileName = br.readLine();
System.out.println("Enter the Keyword");
keyword = br.readLine();
keyword = keyword.toUpperCase();
br.close();
//to read the file line by line and convert
br = new BufferedReader(new FileReader(fileName));
while((line = br.readLine()) != null){
line = line.toUpperCase();
//More code to perform the substitution, removed to reduce the code
}
br.close();
//code for decryption
System.out.println("Enter the filename to decode");
try
{
BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
fileName = br1.readLine();
br1.close();
}catch(Exception ex){ System.out.println(ex.getMessage());}
System.out.println(fileName);
br = new BufferedReader(new FileReader(fileName));
while((line = br.readLine()) != null){
line = line.toUpperCase();
//The decryption code is here
}
br.close();
}
}
我从try catch块
Stream closed
我不明白,在System.in流可以如何被关闭下面的消息? 我犯了什么错误,我该如何解决?
谢谢,我会那样做的。 但是有没有什么方法可以使用相同的缓冲读取器? 这只是出于好奇。 – nikhil 2012-02-19 13:50:30