Fix issue 1915

[KID0031]

fix #1915

[zhuangjiaju]

@Test
public void test11() {
    String fileName = TestFileUtil.getPath() + "stud" + System.currentTimeMillis() + ".xlsx";

    List<Student> list = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
        Student student = new Student();
        student.setId(i);
        list.add(student);
    }
    EasyExcel.write(fileName, Student.class)
        .sheet().doWrite(list);
}

@Data
public static class Student{
    private Integer id;

}

实际测试未发现情况 是否版本过老？

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