@Component @RequestMapping("/student") public?class?StudentController?extends?BaseController?{ @Autowired StudentService?studentService; @RequestMapping(value?=?"/listStudent") public?void?list()?throws?Exception?{ ... //這里調用getStudents方法正常 List<Student>?stuList?=?this.getStudents(); ... } public?List<Student>?getStudents()?{ try?{ List<Student>?stuList?=?studentService.listStudent(page,?rows,?sort,?order); return?stuList; }?catch?(Exception?e)?{ e.printStackTrace(); } return?null; } @RequestMapping(value?=?"/export") public?void?export()?throws?Exception?{ ... //?獲取類 //根據傳過來的參數?className,?methodName?調用相應的方法 Class?clazz?=?Class.forName(className); Object?o?=?clazz.newInstance(); Method?m?=?clazz.getDeclaredMethod(methodName); //這里調用getStudents方法出現studentService空指針異常 List?list?=?(List)?m.invoke(o); ... } }以上是省略過的代碼!