打印流、字符流的读取写入

字节打印流(important)

@Test
    //字符流读取写入
    public void test5(){
        BufferedReader bufferedReader = null;
        BufferedWriter bufferedWriter = null;

        try {
            bufferedReader = new BufferedReader(new FileReader("A:\U盘\大三\作业\练习.txt"));
            bufferedWriter =new BufferedWriter(new FileWriter("练习.txt"));


           


           //第二种方式 按照字符读取
            int len=0;
            char [] c  = new char[1024];
            while ((len=bufferedReader.read(c))!=-1){
                for (char c1 : c) {
                    System.out.println("显示读取内容"+c1);
                }
                bufferedWriter.write(c,0,len);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                bufferedReader.close();
                bufferedWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

字符流读取和写入

@Test
    //字符流读取写入
    public void test4(){
        Reader reader = null;
        Writer writer = null;
        try {
            reader = new FileReader("FileWriter.txt");
            writer = new FileWriter("FileWriter2.txt");

            char [] c =new char[1024];
            int len=0;
            while ((len=reader.read(c))!=-1){
                writer.write(c,0,len);
                for (char c1 : c) {
                    System.out.print(c1);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                reader.close();
                writer.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }