【java】io流之字节流转为字符流：java.io.OutputStreamWriter和java.io.InputStreamReader

 1 package 文件操作;
 2 
 3 import java.io.File;
 4 import java.io.FileOutputStream;
 5 import java.io.IOException;
 6 import java.io.OutputStream;
 7 import java.io.OutputStreamWriter;
 8 
 9 public class TestOutputStreamWriter {
10     public static void main(String[] args) throws IOException {
11         File file=new File("D:"+File.separator+"test.txt");
12         OutputStream out =new FileOutputStream(file);//若文件不存在会自动创建
13         //字节流转换为字符流。文件内容本质上都是以字节形式在操作系统里操作的，处理中文时需要在缓冲区进行隐式转换
14         OutputStreamWriter outputStreamWriter=new OutputStreamWriter(out); 
15         String str="Welcom!中国";
16         outputStreamWriter.write(str);
17 //        outputStreamWriter.flush();//通过flush()或close()操作后内容才会被写进文件
18         outputStreamWriter.close();
19     }
20 }

outputStreamWriter