file操作（7）--------------- BufferedReader读取文件内容

package demo.test2;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

public class BufferReaderDemoAll {

/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
p1();
}
/**
* BufferedReader  读取文件内容
* 通常我们会用readLine()一次一次的读取输入，需要将文件包装成bufferedReader来使用，这要求我们必须使用InputStreamReader把文件转成Reader
* BufferedReader  bf = new BufferedReader(new InputStreamReader(new FileInputStream("a.txt"), "utf-8"));
*
* @throws IOException
*/
public static void p1() throws IOException{
FileInputStream fis = new FileInputStream("a11.txt");
//第一个参数指定FileInputStream，第二个参数指定  字符集
InputStreamReader isr = new InputStreamReader(fis, "utf-8");

BufferedReader  bf = new BufferedReader(isr);

String len = null;
while((len = bf.readLine()) != null){
System.out.println(len);
}

bf.close();
}

}