2018-8-28

IO流

Writer类里面的方法：

PrintWriter类里面的方法：

OutputStreamWrier类里面的方法：



FileReader和BufferedReader的区别
https://www.cnblogs.com/johnsonwei/p/5661241.html

InputStreamReader和BufferedReader的区别

InputStreamReader: InputStreamReader封裝了InputStream在里头, 它以较高级的方式,一次读取一个一个字符;

BufferedReader:BufferedReader则是比InputStreamReader更高级,它封裝了StreamReader类,一次读取一行的字符//readLine()

InputStreamReader类里面的方法：

参考来源https://blog.csdn.net/lexang1/article/details/77647545（java io）

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.PrintWriter;
public class IOTest {
public static void main(String[] args) throws Exception {
String str = "中国人";
/*FileOutputStream fos = new FileOutputStream("1.txt");
fos.write(str.getBytes("UTF-8"));
fos.close();*/
/*FileWriter fw = new FileWriter("1.txt");
fw.write(str);
fw.close();*/
PrintWriter pw = new PrintWriter("1.txt","utf-8");
pw.write(str);
pw.close();
/*FileReader fr = new FileReader("1.txt");
char[] buf = new char[1024];
int len = fr.read(buf);
String myStr = new String(buf,0,len);
System.out.println(myStr);*/
/*FileInputStream fr = new FileInputStream("1.txt");
byte[] buf = new byte[1024];
int len = fr.read(buf);
String myStr = new String(buf,0,len,"UTF-8");
System.out.println(myStr);*/
BufferedReader br = new BufferedReader(
new InputStreamReader(
new FileInputStream("1.txt"),"UTF-8"
)
);
String myStr = br.readLine();
br.close();
System.out.println(myStr);
}
}

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