package?k; import?java.io.FileInputStream; import?java.io.FileOutputStream; import?java.io.IOException; import?java.io.InputStreamReader; import?java.io.OutputStreamWriter; public?class?IsrAndOswDemo?{ public?static?void?main(String[]?args)?throws?IOException?{ FileInputStream?in=new?FileInputStream("D:\\test\\日記3.txt"); InputStreamReader?isr=new?InputStreamReader(in,"gbk"); FileOutputStream?out?=?new?FileOutputStream("D:\\test\\日記1.txt"); OutputStreamWriter?osw=new?OutputStreamWriter(out,"gbk"); /*int?c; while((c=isr.read())!=-1){ System.out.print((char)c); }*/ char[]?buffer=new?char[20*1024]; int?c; //字節(jié)批量讀取，返回的是讀到的字節(jié)的個數(shù) while((c=isr.read(buffer,?0,?buffer.length))!=-1){ String?s=new?String(buffer,0,c); System.out.print(s); osw.write(buffer,?0,?c); } osw.flush(); isr.close(); osw.close(); } }就像上方的代碼，in和out沒有close可以么？