Java之基于字符流的文件写入与读取

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读取写入：

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class Test1 {public static void main(String[] args) {try {int linenum=0;FileReader fr=new FileReader("E:\\java\\javatest\\NewFile.txt");BufferedReader br=new BufferedReader(fr);BufferedWriter bw=new BufferedWriter(new FileWriter("E:\\java\\javatest\\targetFile.txt"));String s=br.readLine();while(s!=null){linenum++;bw.write(linenum+"   ");bw.write(s);bw.newLine();s=br.readLine();}bw.close();br.close();System.out.println("文件保存结束...");} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}

读取:

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.io.OutputStreamWriter;public class Test0 {public static void main(String[] args) {try {FileReader fr=new FileReader("E:\\java\\javatest\\NewFile.txt");BufferedReader br=new BufferedReader(fr);BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(System.out));String s=br.readLine();while(s!=null){bw.write(s);bw.newLine();s=br.readLine();}br.close();bw.close();System.out.println("文件读取成功..");} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

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