package com.yeqc.rwfile;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
public class ReadFile {
public static void main(String[] args) {
File file = new File("text.txt");
if (file.exists()) {
System.err.println("exist");
try {
FileInputStream fis = new FileInputStream(file);
InputStreamReader isr = new InputStreamReader(fis, "UTF-8");
BufferedReader br = new BufferedReader(isr);
String line;
while((line = br.readLine()) != null){
System.out.println(line);
}
br.close();
isr.close();
fis.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
File newfile = new File("newtext.txt");
FileOutputStream fos = new FileOutputStream(newfile);
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
BufferedWriter bw = new BufferedWriter(osw);
bw.write("鹅\n");
bw.write("鹅鹅鹅\n");
bw.write("曲项向天歌\n");
bw.write("白毛浮绿水\n");
bw.write("红掌拨清波\n");
bw.close();
osw.close();
fos.close();
System.out.println("写入完成");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}运行结果：
exist 鹅 鹅鹅鹅 曲项向天歌 白毛浮绿水 红掌拨清波 写入完成
原文：http://11317783.blog.51cto.com/11307783/1769478