Enhance the efficiency of reading and writing files - buffered stream

Buffer Flow Overview

• Input and output stream is buffered with a buffer stream
• Buffer flow can significantly reduce the number of our access to IO, protect the hard disk!
• The processing flow itself is a buffered stream (flow wrap), a buffered stream flow must be attached to the node (original stream)
• Process flow stream is wrapped in the original node, corresponding to wrap the pipe in the pipeline

 

Create a character stream read file object:

BufferedReader br = new BufferedReader(new FileReader("readme.txt"));

Create a character stream write file object:

BufferedWriter bw = new BufferedWriter(new FileWriter("dest.txt"));

Read and write data while loop:

char [] = CHS new new  char [2048 ];
 int len;
 the while ((len = br.read (CHS)) = -1! ) { 
bw.write (CHS ); 
} 
bw.flush (); // remember refreshed buffer flow

Close resources:

br.close();
bw.close();

 

Of course, with the buffer flow it is also possible to copy files, highly efficient!