public class ReadByteStream {
public static void main(String[] args) {
//stream 字节流
//reader,writer 字符流
//input 读取外部东西，
//output 输出
try { //read byte stream,mytext.txt is exits
FileInputStream inputStream=new FileInputStream("mytext.txt");
byte []in=new byte[60];
inputStream.read(in);//把字节读入数组中
//String str=new String(in);默认是GBK
String str=new String(in,"UTF-8");//是乱码
System.out.println(str);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public class WriteByteStream {
public static void main(String[] args) {
try {
FileOutputStream fileOutputStream=new FileOutputStream("mytext1.txt");
String str="hello ,jack...";
byte []out=str.getBytes();
try {
fileOutputStream.write(out);
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
public class CopyByByteStream {
public static void main(String[] args) {
try {
FileInputStream inputStream=new FileInputStream("water.jpg");
FileOutputStream outputStream=new FileOutputStream("newwater.jpg");
byte []in=new byte[50]; //现在只是读取了50个字节,不能读取完整的图片
// inputStream.read(in); //不能读取完整的图片
// outputStream.write(in);
// inputStream.read(in);返回int类型，如果返回-1表示没有数据了
while(inputStream.read(in)!=-1)//表示还有数据，就写入
{
outputStream.write(in);
}
inputStream.close();
outputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public class FileReaderAndFileWriter {
public static void main(String[] args) {
try {
//文件写入读取
FileReader fileReader=new FileReader("java.txt");
BufferedReader bufferedReader=new BufferedReader(fileReader);
//字符流包装为缓冲流
FileWriter fileWriter=new FileWriter("java_new_1");
BufferedWriter bufferedWriter=new BufferedWriter(fileWriter);
String len;
while ((len=bufferedReader.readLine())!=null) {
bufferedWriter.write(len+"\n");
}
bufferedWriter.flush();//注意writer有关的都要flush()
bufferedWriter.close();
bufferedReader.close();
fileReader.close();
fileWriter.close();
System.out.println("Done");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public class BufferReader {
public static void main(String[] args) {
try {
FileInputStream fileInputStream=new FileInputStream("java.txt");
InputStreamReader isr=new InputStreamReader(fileInputStream);//字节流转化为字符流
BufferedReader reader=new BufferedReader(isr);
FileOutputStream fileOutputStream=new FileOutputStream("java_new_buffered.txt");
OutputStreamWriter osw=new OutputStreamWriter(fileOutputStream);
BufferedWriter writer=new BufferedWriter(osw);
String len;
while ((len=reader.readLine())!=null) {
writer.write(len);
}
writer.flush();
writer.close();
osw.close();
fileInputStream.close();
fileOutputStream.close();
System.out.println("done");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public class ReadBufferByStream {
public static void main(String[] args) {
try {
FileInputStream fileInputStream=new FileInputStream("vidio.wmv");
BufferedInputStream bufferedInputStream=new BufferedInputStream(fileInputStream);
FileOutputStream fileOutputStream=new FileOutputStream("E://TextVidio.wmv");
BufferedOutputStream bufferedOutputStream=new BufferedOutputStream(fileOutputStream);
byte []by=new byte[100];
while ( bufferedInputStream.read(by)!=-1) {
bufferedOutputStream.write(by);
}
bufferedInputStream.close();
bufferedOutputStream.close();
fileInputStream.close();
fileOutputStream.close();
System.out.println("vidio create sucess....");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
时间： 2024-10-13 23:00:16