package com.swt.common.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
public class FileUtil {
/**
* 将数据写入文件
* @param registration
*/
public static void writerDataFile(String registration){
StringBuffer strbuffBuffer=new StringBuffer();
strbuffBuffer.append("key=");
File file=new File("dll/registercodeKey.dll");
//判断文件是否存在
if(!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
FileWriter writer=new FileWriter(file,true);//true表示追加写入文件
BufferedWriter bfwriter=new BufferedWriter(writer);
bfwriter.write(strbuffBuffer.append(Encryption.encryptAndUncrypt(registration)).toString());
bfwriter.close();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 判断文件是否存在
* @param filepath
* @return
*/
public static boolean fileIsExists(String filepath){
File file=new File(filepath);
if(file.exists())
return true;
else
return false;
}
/**
* 判断 文件目录是否存在 不存在创建目录
* @param mkdir
* @param file
* @param data
*/
public static boolean catalogIsExists(String mkdir){
File fileMkdir=new File(mkdir);
if(!fileMkdir.exists() && !fileMkdir.isDirectory()){
//创建目录
fileMkdir.mkdir();
return true;
}
return false;
}
/**
* 创建文件 并且写入数据
* @param filePath
* @param data
* @return
*/
public static boolean createFileAndWriterData(String filePath,String data){
//
StringBuffer strbuffBuffer=new StringBuffer();
strbuffBuffer.append("key=");
File file=new File(filePath);
//判断文件是否存在
if(!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
FileWriter writer=new FileWriter(file,true);//true表示追加写入文件
BufferedWriter bfwriter=new BufferedWriter(writer);
bfwriter.write(strbuffBuffer.append(Encryption.encryptAndUncrypt(data)).toString());
bfwriter.close();
writer.close();
return true;
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
/***
*
* 输入流
* java.io.InputStream这个类将数据读取为原始字节所需要的方法
* 无参数的read 方法读取字节数 作为0-255的int 类型返回 流结束有返回-1表示
* public abstract int read() throws IOException
* public int read(byte[] input) throws IOException
* public int read(byte [] input ,int offset,int length) throws IOException
* public long skip(long n) throws IOException
* public int available()throws IOException
* public void close()trhows IOException
* @throws IOException
*
*/
public static void fileReader() throws IOException{
//读取二进制文件
File file=new File("D:/Documents/Desktop/a.jpg");
FileInputStream in=new FileInputStream(file);
BufferedInputStream buffInput=new BufferedInputStream(in);
//获取整个文件字节
int available=buffInput.available();
byte btyes[]=new byte[available];
//一次性读出 表示流也结束（注意使用available 结束时候返回0）
while(buffInput.read(btyes)!=0){
System.out.println(new String(btyes));
}
buffInput.close();
in.close();
}
/**
*
*输出流提供数据所需要的基本方法
*public abstract void write(int b) throws IOException
*public void write(byte[] data)throws IOException
*public void write(byte[] data,int offset,int length)throws IOException
*public void flush throws IOException
*public void close() throws IOException
*
*
* 二进制文件读取
* @throws IOException
*/
public static void fileCopy() throws IOException{
//读取二进制文件
File file=new File("D:/Documents/Desktop/a.jpg");
FileInputStream in=new FileInputStream(file);
BufferedInputStream buffInput=new BufferedInputStream(in);
//写入另外一个文件
File copy=new File("D:/Documents/Desktop/b.jpg");
if(!copy.exists()){
copy.createNewFile();
}
//写入文件
FileOutputStream out=new FileOutputStream(copy);
BufferedOutputStream bufferOut=new BufferedOutputStream(out);
int count=0;
//读取1024
byte [] bytes=new byte[1024];
int len=0;
//循环读取
while((len=buffInput.read(bytes))!=-1){
//System.out.println(new String(bytes, count, len));
bufferOut.write(bytes, count, len);
}
bufferOut.flush();
bufferOut.close();
out.close();
buffInput.close();
in.close();
}
public static void main(String[] args) {
//boolean bool=createFileMkdir("file/abadadesssfad");
//
//if(bool){
//
//boolean b=createFileAndWriterData("file/abadadesssfad/registercodeKey.dll", "A58AXE8D5E8SDES68SES");
//
//if(b){
//System.out.println("写入数据成功...去看看吧");
//
//}else{
//System.out.println("写入数据失败 你瞧瞧吧。。。。");
//}
//}else{
//System.out.println("穿件文件夹失败咯哦");
//}
//System.out.println(Encryption.encryptAndUncrypt("bb{fgfpgfppfp").equals("A58AXE8D5E8SDES68SES"));
try {
fileReader();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}