Io转换流:
就是字节流和字符流的相互转换,由于我们在传输文件时,不知道你具体想要传递什么文件,这时候人家一般会丢给你一个字节流接口,
如果你想使用字符,这时候就需要字节和字符相互转换即可。
- OutputStreamWriter:可以将字节输出流转换为字符输出流
- InputStreamReader: 可以将字节输入流转换为字符输入流
字节输出流转换字符输出流:
public class Test6 { public static void main(String[] args) { try { write(new FileOutputStream("E:\\idea_workspace3\\yangli\\class_obj\\src\\com\\lili\\file\\lili.txt")); } catch (FileNotFoundException e) { e.printStackTrace(); } } private static void write(OutputStream out) { Writer writer = new OutputStreamWriter(out); try { writer.write("即使再小的帆也能远航"); writer.close(); } catch (IOException e) { e.printStackTrace(); } } }
字节输入流转换字符输入流:
public class Test6 { public static void main(String[] args) { try { out(new FileInputStream("E:\\idea_workspace3\\yangli\\class_obj\\src\\com\\lili\\file\\lili.txt")); } catch (FileNotFoundException e) { e.printStackTrace(); } } private static void out(InputStream in) { Reader reader = new InputStreamReader(in); char[] chars = new char[1]; int len = -1; try { while ((len = reader.read(chars)) != -1) { System.out.print(new String(chars, 0, len)); } } catch (IOException e) { e.printStackTrace(); } } }