Java输入输出重定向代码

try {  

BufferedInputStream in = new BufferedInputStream(new FileInputStream("input.txt"));

 System.setIn(in);

 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));



 

PrintStream out = System.out; //
保存原输出流

PrintStream ps=new PrintStream("./output.txt"); //
创建文件输出流

System.setOut(ps); //
设置使用新的输出流



// String s;

//  while((s = br.readLine())!=null)

//  System.out.println(s);

 

 

} catch (FileNotFoundException e) { 

e.printStackTrace(); 

} catch (IOException e) {

// TODO 自动生成的 catch 块

e.printStackTrace();

} 

try{PrintStream out =

new PrintStream(

new BufferedOutputStream(

new FileOutputStream("test.out")));}

  catch(IOException e) {

e.printStackTrace();

}