@Autowired注解入static属性时,出现NullPointerException异常。
使用构造方法可解决:
@Component public class Test { private static UserService userService; @Autowired public Test(UserService userService) { Test.userService = userService; } public static void test() { userService.test(); } }
使用@PostConstruct注解解决:
@Component public class Test { private static UserService userService; @Autowired private UserService userServiceAdd; @PostConstruct public void beforeInit() { userService = userServiceAdd; } }