java读写txt文件

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;

public class WriterOrReaderTxt {

// 写文件

private void writerTxt() {

BufferedWriter fw = null;

try {

File file = new File("D://text.txt");

fw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true), "UTF-8")); // 指定编码格式，以免读取时中文字符异常

fw.append("我写入的内容");

fw.newLine();

fw.append("我又写入的内容");

fw.flush(); // 全部写入缓存中的内容

} catch (Exception e) {

e.printStackTrace();

} finally {

if (fw != null) {

try {

fw.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

// 读文件

private void readTxt() {

String filePath = WriterOrReaderTxt.class.getResource("").getPath().replace("file:", "")

+ "/test.txt"; // 文件和该类在同个目录下

BufferedReader reader = null;

try {

reader = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "UTF-8")); // 指定读取文件的编码格式，要和写入的格式一致，以免出现中文乱码,

String str = null;

while ((str = reader.readLine()) != null) {

System.out.println(str);

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

reader.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}