流：文本文件的读写

一、缓冲读取文本：
关键点：
(1).
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream));
(2).循环判断条件
String temp = br.readLine() != null;

package pdfSearchKeyWords;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;public class ReadAndWrite {    public static void main(String[] args){        String path = "C:\\Users\\Administrator\\Desktop\\jar\\lxl.txt";        String tagPath = "C:\\Users\\Administrator\\Desktop\\lxl.txt";        copyTxt(path,tagPath);    }    public static void copyTxt(String path,String tagPath){        FileInputStream fis = null;        InputStreamReader reader =null;        BufferedReader br = null;        StringBuffer sb = new StringBuffer();        BufferedWriter bw = null;        try {            //fis = new FileInputStream("C:\\Users\\Administrator\\Desktop\\jar\\lxl.txt");            fis = new FileInputStream(path);            reader = new InputStreamReader(fis);            br = new BufferedReader(reader);            String temp=null;            while((temp = br.readLine())!=null){                sb.append(temp);            }            //bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\lxl.txt")));            bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(tagPath)));            System.out.println(sb);            bw.write(sb.toString());        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally{            try {                br.close();                reader.close();                fis.close();                bw.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}