public class Demo {public static void main(String[] args) {File f = new File("word.txt");FileOutputStream out = null;//字节流OutputStreamWriter osw = null;//字节流转字符流BufferedWriter bw = null;//缓冲字符流try {out = new FileOutputStream(f);osw = new OutputStreamWriter(out, "GBK");//字节流转字符流，编码格式GBKbw = new BufferedWriter(osw);bw.write("夕西行");} catch (FileNotFoundException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {//注意关闭顺序，由后至前if (bw != null) {try {bw.close();} catch (IOException e) {e.printStackTrace();}}if (osw != null) {try {osw.close();} catch (IOException e) {e.printStackTrace();}}if (out != null) {try {out.close();} catch (IOException e) {e.printStackTrace();}}}FileInputStream in = null;//字节流InputStreamReader isr = null;//字节流转字符流BufferedReader br = null;//缓冲字符流try {in = new FileInputStream(f);isr = new InputStreamReader(in, "GBK");br = new BufferedReader(isr);System.out.println(br.readLine());} catch (FileNotFoundException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {if (br != null) {try {br.close();} catch (IOException e) {e.printStackTrace();}}if (isr != null) {try {isr.close();} catch (IOException e) {e.printStackTrace();}}if (in != null) {try {in.close();} catch (IOException e) {e.printStackTrace();}}}}
}

public class Demo {public static void main(String[] args) {File f = new File("word.txt");//在try的（）中写入代码，try-catch结束，流自动关闭try (FileOutputStream out = new FileOutputStream(f);OutputStreamWriter osw = new OutputStreamWriter(out, "GBK");BufferedWriter bw = new BufferedWriter(osw);) {bw.write("夕西行");} catch (IOException e) {e.printStackTrace();}FileInputStream in = null;//字节流InputStreamReader isr = null;//字节流转字符流BufferedReader br = null;//缓冲字符流try {in = new FileInputStream(f);isr = new InputStreamReader(in, "GBK");br = new BufferedReader(isr);System.out.println(br.readLine());} catch (FileNotFoundException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {if (br != null) {try {br.close();} catch (IOException e) {e.printStackTrace();}}if (isr != null) {try {isr.close();} catch (IOException e) {e.printStackTrace();}}if (in != null) {try {in.close();} catch (IOException e) {e.printStackTrace();}}}}
}