java 读写文件的代码。

java 读写文件的代码。

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;public class T1116 {static String str = "生活本就是见招拆招，不必过分焦虑。";final static String FILE = "d:\\test.txt";static void fun1() throws IOException {File file = new File(FILE);FileOutputStream fos = new FileOutputStream(file);OutputStreamWriter osw = new OutputStreamWriter(fos, "utf-8");osw.write(str);osw.close();fos.close();}static void fun2() throws IOException {File file = new File(FILE);FileInputStream fis = new FileInputStream(file);InputStreamReader isr = new InputStreamReader(fis, "utf-8");int c = 0;System.out.println("内容:");while ((c = isr.read()) != -1)System.out.print((char) c);System.out.println();isr.close();fis.close();}// 利用缓冲流复制test.txt为my.txt。static void fun3() throws IOException {// 读文件File file = new File(FILE);File file1 = new File("my.txt");FileInputStream fis = new FileInputStream(file);InputStreamReader isr = new InputStreamReader(fis, "utf-8");BufferedReader br = new BufferedReader(isr);FileOutputStream fos = new FileOutputStream(file1);OutputStreamWriter osw = new OutputStreamWriter(fos, "utf-8");BufferedWriter bw = new BufferedWriter(osw);String line;while ((line = br.readLine()) != null) {bw.write(line);}bw.close();osw.close();fos.close();br.close();isr.close();fis.close();System.out.println("my.txt的位置是:" + System.getProperty("user.dir"));}public static void main(String[] args) throws IOException {// TODO Auto-generated method stubfun1();fun2();fun3();}}