文件流

1、獲取指定路徑的文件內容

public static void main(String[] args) {
        try {
            String encoding="UTF-8";
            File file=new File("C:/Users/Administrator/Desktop/新建文本文檔.txt");
            if(file.isFile() && file.exists()){ //判斷文件是否存在
                InputStreamReader read = new InputStreamReader(
                new FileInputStream(file),encoding);//考慮到編碼格式
                BufferedReader bufferedReader = new BufferedReader(read);
                String lineTxt = null;
                while((lineTxt = bufferedReader.readLine()) != null){
                    System.out.println(lineTxt);
                }
                read.close();
            }else{
                System.out.println("找不到指定的文件");
            }
        } catch (Exception e) {
            System.out.println("讀取文件內容出錯");
            e.printStackTrace();
        }
    }