String filePath = this.getServletContext().getRealPath("record.text");
//打开文件
try {
FileReader fileReader = new FileReader(filePath)
BufferedReader bufferedReader = new BufferedReader(fileReader);
//读出一行数据
String nums = bufferedReader.readLine();
//把nums添加到ServletContext
this.getServletContext().setAttribute("nums", nums);
System.out.println(nums); //请问我这里打印出来为什么是null？？？
bufferedReader.close();
} catch (Exception e) {
e.printStackTrace();
}
}