@PreAuthorize控制器会使@InitBinder中的@Inject无效

问题描述

在一个简单的控制器中:

In a simple controller :

@PreAuthorize("hasAuthority('USER')")
@Controller
@RequestMapping("/test")
public class TestController {

  private Logger logger = LoggerFactory.getLogger(getClass());

  @Inject
  private MyValidator myValidator;

  @InitBinder("myObj")
  private void initBinder(WebDataBinder binder) {
    logger.info("myValidator = {}", myValidator);
    binder.initDirectFieldAccess();
    binder.setValidator(myValidator);
  }

  @RequestMapping(value = "/doPost", method = RequestMethod.POST)
  public String doPost(MyObj myObj , BindingResult br ) throws IOException {
    logger.info("myObj = {} , bindingResult = {}" , myObj , br);
    return "redirect:/test/form";
  }
}

我注意到在initBinder方法中注入的验证器始终为null，记录器甚至为null(并抛出NPE)，这很奇怪.

I noticed the injected validator is always null in the initBinder method , the logger is even null (and throws NPE) , this is weird.

如果我完全删除了@InitBinder initBinder()方法，则每种方法中的myValidator都将再次可用(不为null).

If I totally remove the @InitBinder initBinder() method , the myValidator is available (not null) again in each method.

消除许多因素后，我发现罪魁祸首是@PreAuthorize("hasAuthority('USER')").删除此@PreAuthorize后，一切正常.

After eliminating many factors , I found the culprit is the @PreAuthorize("hasAuthority('USER')") . After removing this @PreAuthorize , everything works fine.

这是一个错误吗?与SpringSecurity和SpringValidation和SpringMVC有冲突吗?

Is it a bug ? Does something conflicts with SpringSecurity and SpringValidation and SpringMVC ?

如何修复?

环境:

<spring.version>4.2.1.RELEASE</spring.version>
<springboot.version>1.3.0.M5</springboot.version>
<spring-security.version>4.0.2.RELEASE</spring-security.version>

非常感谢.

推荐答案

最简单的解决方案是为myValidator创建一个setter方法.然后在应用初始化时调用此setter.对所有已被@PreAuthorize标记取消的注射剂执行此操作.

The easiest solution was to create a setter method for myValidator. this setter is then called when the app initializes. Do this for all the injectables that are being nullified by @PreAuthorize tags.

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