Java IO操作

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前几天碰到一个io程序，发现在使用上忘得差不多了，这里写几个demo便宜回顾一下。

字符流

FileReader/FileWriter demo

public static void main(String[] args){        try {            FileReader fileReader = new FileReader("E:\\test.txt");            FileWriter fileWriter = new FileWriter("D:\\newTest2.txt");            char[] chars = new char[1024];            int len = 0;            while((fileReader.read(chars))!=-1){                fileWriter.write(chars,0,len);            }            fileReader.close();            fileWriter.close();        }catch (IOException e){            e.printStackTrace();        }    }

BufferedReader/BufferedWriter demo

public static void main(String[] args){try {           FileWriter fileWriter = new FileWriter("E:\\test1111.txt");           FileReader fileReader = new FileReader("E:\\test.txt");           BufferedReader bufferedReader = new BufferedReader(fileReader);           BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);           char[] chars = new char[1024];           int len ;           while((len=bufferedReader.read(chars))!=-1){               bufferedWriter.write(new String(chars,0,len));           }           bufferedReader.close();           bufferedWriter.close();       }catch (IOException e){           e.printStackTrace();       }    }}

字节流

FileInputStream/FileOutputStream demo

public static void main(String[] args) {        try {            FileInputStream fis = new FileInputStream("E:\\test.txt");            FileOutputStream fos = new FileOutputStream("D:\\newTest.txt");            byte[] bytes = new byte[1024];            int len = 0;            while( (len=fis.read(bytes))!=-1){                fos.write(bytes,0,len);            }            fis.close();            fos.close();        } catch (Exception e) {            e.printStackTrace();        }    }}

BufferedInputStream/BufferedOutputStream demo

public static void main(String[] args){       BufferedInputStream bis =null;       BufferedOutputStream bos = null;       try {           bis = new BufferedInputStream(new FileInputStream("E:\\test.txt"));           bos = new BufferedOutputStream(new FileOutputStream("D:\\newTest1.txt"));           int len = 0;           byte[] bytes = new byte[1024];           while((len=bis.read(bytes))!=-1){               bos.write(bytes,0,len);           }       }catch (IOException e){           e.printStackTrace();       }finally {           try {               if(bos!=null) bos.close();               if(bis!=null) bis.close();           }           catch (IOException e) {               e.printStackTrace();           }       }   }

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