JAVA implements method of reading the contents of txt file

public class txttest {
  /**
   * 读取txt文件的内容
   * @param file 想要读取的文件对象
   * @return 返回文件内容
   */
  public static String txt2String(File file){
    StringBuilder result = new StringBuilder();
    try{
      BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
      String s = null;
      while((s = br.readLine())!=null){//使用readLine方法，一次读一行
        result.append(System.lineSeparator()+s);
      }
      br.close();  
    }catch(Exception e){
      e.printStackTrace();
    }
    return result.toString();
  }
   
  public static void main(String[] args){
    File file = new File("D:/errlog.txt");
    System.out.println(txt2String(file));
  }
}