class="java">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(); } } }
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