java 自定义加密和解密文件
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2022-04-03 15:59:31
简单自定义 字节加1package game01;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.nio.channels.FileChannel;import java.util.Scanner;public class Tool {public s...
简单自定义 字节加1 有用记得点个赞
package game01;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.util.Scanner;
public class Tool {
public static FileInputStream fis =null;
public static FileOutputStream fos =null;
public static long start;//计时
public static long end;
public static String jiamilj = null;
public static String jiemilj = null;
public static FileChannel fc = null;//文件大小
public static void main(String []args) throws IOException{
Scanner in = new Scanner(System.in);
System.out.println("你要加密还是解密:");
String input = in.next();
if(input.equals("加密")){
Scanner in01 = new Scanner(System.in);
System.out.println("你要加密的文件路径:(E:\\a.txt):");
String input01 = in01.next();
System.out.println(input01);
jiami(input01);
System.out.println("加密成功,加密路径:"+jiamilj);
System.out.println("加密用时"+(end-start)+"毫秒");
size(1);
System.out.println("文件大小"+fc.size()+"Byte");
fis.close();
fos.close();
}else{
Scanner in02 = new Scanner(System.in);
System.out.println("你要解密的文件路径:(E:\\b.txt):");
String input02 = in.next();
jiemi(input02);
System.out.println("解密成功,解密路径为:"+jiemilj);
System.out.println("解密密用时"+(end-start)+"毫秒");
size(2);
System.out.println("文件大小"+fc.size()+"Byte");
fis.close();
fos.close();
}
}
//加密
public static void jiami(String input02) throws IOException{
start = System.currentTimeMillis();
in01(input02);
end = System.currentTimeMillis();
}
//解密
public static void jiemi(String input02) throws IOException{
start = System.currentTimeMillis();
in02(input02);
end = System.currentTimeMillis();
}
//配套加密
public static void in01(String input03) throws IOException{
fis = new FileInputStream(input03);
int i; //核心代码
while((i=fis.read())!=-1){
out01(i);
}
}
public static void out01(int i) throws IOException{
fos = new FileOutputStream("E:\\b.txt",true);
fos.write(i+1);
jiamilj = "E:\\b.txt";
}
//配套解密
public static void in02(String input03) throws IOException{
fis = new FileInputStream(input03);
int i; //核心代码
while((i=fis.read())!=-1){
out02(i);
}
}
public static void out02(int i) throws IOException{
fos = new FileOutputStream("E:\\c.txt",true);
fos.write(i-1);
jiemilj = "E:\\c.txt";
}
//求文件大小
public static void size(int s) throws FileNotFoundException{
if(s==1){
FileInputStream fis01 = new FileInputStream("E:\\b.txt");
fc = fis01.getChannel();
}else{
FileInputStream fis01 = new FileInputStream("E:\\c.txt");
fc = fis01.getChannel();
}
}
}
本文地址:https://blog.csdn.net/xiaomingpeng/article/details/109928318
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