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

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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();}}

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