public class Demo3 {public static void main(String[] args) throws IOException {writeText();readText();}public static void readText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileInputStream fileInputStream = new FileInputStream(file);//输入字节流转换成输入字符流InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream);char[] cs = new char[1024];int length = 0;while((length = inputStreamReader.read(cs))!=-1) {System.out.println(new String(cs,0,length));}inputStreamReader.close();}public static void writeText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileOutputStream fileOutputStream = new FileOutputStream(file);OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream);outputStreamWriter.write("你好，陌生人");outputStreamWriter.close();}
}

public class Demo4 {public static void main(String[] args) throws IOException {readText();writeText();}public static void readText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileOutputStream fileInputStream = new FileOutputStream(file);//输出字节流转换成输入字符流OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileInputStream);//使用输出字符流的缓存类BufferedWriter bufferedReader = new BufferedWriter(outputStreamWriter);//一行一行存bufferedReader.write("这是第一行数据");bufferedReader.newLine();bufferedReader.write("这是第二行数据");bufferedReader.close();}public static void writeText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileInputStream fileInputStream = new FileInputStream(file);//输入字节流转换成输入字符流InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream);//使用输入字符流的缓存类BufferedReader bufferedReader = new BufferedReader(inputStreamReader);String line = null;//一行一行读取文本while((line = bufferedReader.readLine())!=null) {System.out.println(line);}bufferedReader.close();}
}

public class Demo5 {public static void main(String[] args) throws IOException {writeText();readText();}public static void writeText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileOutputStream fileOutputStream = new FileOutputStream(file);OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, "iso8859-1");outputStreamWriter.write("你好！！！");outputStreamWriter.close();}public static void readText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileInputStream fileInputStream = new FileInputStream(file);InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream,"iso8859-1");char[] cs = new char[1024];int length = 0;while((length = inputStreamReader.read(cs))!=-1) {System.out.println(new String(cs,0,length));}inputStreamReader.close();}
}

public static void readText() throws IOException {File file = new File("D:\\新建文件夹\\a.txt");FileInputStream fileInputStream = new FileInputStream(file);InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream,"iso8859-1");char[] cs = new char[1024];int length = 0;while((length = inputStreamReader.read(cs))!=-1) {String str = new String(cs,0,length);byte[] buf = str.getBytes("iso8859-1");System.out.println(Arrays.toString(buf));}inputStreamReader.close();}