FileReader doesn't read file in tomcat Server

Question

i have this code

  public ArrayList<String> getMail() {

        ArrayList<String> i = new ArrayList();

        try {

            int j = 0 ;

            FileReader file = new FileReader("emaillist0.txt");

            BufferedReader lerArq = new BufferedReader(file);

            String linha = lerArq.readLine();

            System.out.println("tp aqio ´prra");
            while (linha != null) {
                i.add(j, linha);
                j++;
                linha = lerArq.readLine();
            }
            System.out.println(i.size());

            file.close();
            return i;
        } catch (IOException e) {
            System.err.printf( e.getMessage());
            return null;
        }

    }

this problem is when i execute this code in apache tomcat throws this error

emaillist0.txt (The system cannot find the file specified)java.lang.NullPointerException but when i execute this code in a java application work perfectly

Answer 1

使用绝对路径而不是文件名，或将文件移到tomcat的bin目录中（当然，这取决于您的操作系统）