读写文件

public static void main(String[] args) throws IOException {
    
    String filePath = "E:\\data\\popo\\yanhua.log";
    FileInputStream fin = new FileInputStream(filePath);
    InputStreamReader reader = new InputStreamReader(fin);
    BufferedReader buffReader = new BufferedReader(reader);
    String strTmp;
    while ((strTmp = buffReader.readLine()) != null) {
        System.out.println(strTmp);
    }
    buffReader.close();
}


public static void writeFile(String filePath, String content) throws IOException {
    //true表示追加内容
    BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(filePath, true));
    bufferedWriter.write(content);
    //换行
    bufferedWriter.newLine();
    bufferedWriter.close();
    System.out.println("写入文件成功");
    }