37 fc = new FileInputStream("data.txt").getChannel(); 38 ByteBuffer buffer = ByteBuffer.allocate(SIZE); 39 // 将文件内容读到指定的缓冲区中 40 fc.read(buffer); 41 buffer.flip();//此行语句一定要有 42 while (buffer.hasRemaining()) { 43 System.out.print((char)buffer.get()); 44 }...
以下是一个使用Java NIO缓冲区将文本文件内容转换为大写的示例: importjava.io.*;importjava.nio.*;publicclassFileConverter{publicstaticvoidmain(String[]args)throwsIOException{StringsourcePath="source.txt";StringtargetPath="target.txt";try(BufferedReaderreader=newBufferedReader(newFileReader(sourcePath));Buff...
int java.io.InputStream.read(byte[] b) throws IOException Reads some number of bytes from the input stream and stores them into the buffer array b. The number of bytes actually read is returned as an integer. This method blocks until input data is available, end of file is detected, or...
要将文件流直接转换成文件,可以使用FileOutputStream类。下面是一个示例代码: import java.io.*; public class ConvertStreamToFile { public static void main(String[] args) throws IOException { // 创建一个文件流 FileInputStream fileInputStream = new FileInputStream("input.txt"); // 创建一个输出流...
importjava.io.FileOutputStream;importjava.io.FileReader;importjava.io.IOException;importjava.io.OutputStreamWriter;importjava.nio.Buffer;publicclassTest18{publicstaticvoidmain(String[]args)throwsIOException{// TODO Auto-generated method stubFileOutputStreamfos=newFileOutputStream("E:\\test.txt");//...
length=bis.read(buffer); } output.flush(); }catch(Exception e) { logger.error("输出文件流时抛异常,filePath={}", filePath, e); }finally{try{ bis.close(); fos.close(); output.close(); }catch(IOException e0) { logger.error("文件处理失败,filePath={}", filePath, e0); ...
= -1) { fileOutputStream.write(buffer, 0, bytesRead); } // 刷新输出流,确保所有数据都被写入文件 fileOutputStream.flush(); ) { // try-with-resources语句自动关闭资源 } catch (SQLException | IOException e) { e.printStackTrace(); } } // 示例用法 public static void main(String[] args)...
@TestpublicvoidTestFileReader(){FileReaderfr=null;try{//1,实例化File类的对象,指明要操作的文件//读入的文件一定要存在,否则会报FileNotFoundException.Filefile=newFile("hello.txt");//相当于Module//2.提供具体的流fr=newFileReader(file);//3.数据的读入//read();返回读入的一个字符。如果达到文件末尾...
//BufferedInputStream方法底层 DEFAULT_BUFFER_SIZE = 8192;publicclassBufferedInputStreamextendsFilterInputStream{privatestaticintDEFAULT_BUFFER_SIZE=8192;} 方法说明: flush():把写出的内容从缓冲区中刷新出去...BufferedOutputStream底层会在缓冲区满以后自动调用flush()方法的,可以不声明;但是在后面所学的...
import java.nio.charset.StandardCharsets;publicclassFileToString{publicstatic String convertToString(InputStream inputStream)throws Exception { ByteArrayOutputStream result = new ByteArrayOutputStream();byte[] buffer = newbyte[1024];int length;while ((length = inputStream.read(buffer)) != -1)...