java 文件读取写入

1.文件写入

try {
    FileWriter fw = new FileWriter("aaaaa", true);
    String[] list={"Hello,world","Are you okay?","Do you know this one?"};
    for (String item : list) {
        fw.write(item +'\n');
    }
    fw.close();
}catch (IOException exception){
    System.out.println(exception);
}

 

 

2.文件读取

try {
    InputStreamReader read = new InputStreamReader(
            new FileInputStream("D:\\antonio\\example"), StandardCharsets.UTF_8);
    BufferedReader bufferedReader = new BufferedReader(read);
    String line = null;
    while ((line = bufferedReader.readLine()) != null) {
        System.out.println(line);
    }
    bufferedReader.close();
    read.close();
}catch (IOException exception){
    System.out.println(exception);
}