Question

我想将一个对象填充为我的spring容器的每个新请求的模型属性。

我做了以下事情。 - 添加了一个新的拦截器，在其中将对象添加到请求对象 - 注册拦截器

拦截器正在执行，但控制器正在返回一个所有值为null的雇员对象。我做错了吗？

public class UserDetailsInterceptor extends AbstractInterceptor {

    private static Class<? extends Annotation> annotationName = PopulateUserDetails.class;

    public UserDetailsInterceptor() {
        super(annotationName);
    }

    @Override
    protected boolean handle(HttpServletRequest request, HttpServletResponse response, HandlerMethod handlerMethod)
            throws Exception {
        log.error("running my interceptor handle now");
        Employee empoyee = populateEmployeeDetails();
        request.setAttribute("employee",employee"); 
        return true;
    }

}


@Slf4j
@RestController
@CrossOrigin
public class TestController {

    @RequestMapping(value = "/tst1", method = RequestMethod.GET)
    @PopulateEmployee
    public Employee getEmployee(@ModelAttribute("employee") Employee employee) {
        return employee;
    }

}

Answer 1

而不是使用AbstractInterceptor使用HandlerInterceptorAdapter

UserDetailsInterceptor将是这样的

public class UserDetailsInterceptor extends HandlerInterceptorAdapter
{
    Employee empoyee = null;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        log.error("running my interceptor handle now");
        empoyee = populateEmployeeDetails();

        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object,
            ModelAndView modelAndView) throws Exception {
        request.setAttribute("employee",employee"); 

    }
}

在spring mvc中自动设置模型属性

1 个答案: