spring boot 2 security 403 无权

公司项目Springboot2 + security REST 风格接口，权限不足时， 返回security 自带 403 状码：

{
   "timestamp": "2018-09-19T07:02:17.979+0000",
   "status": 403,
   "error": "Forbidden",
   "message": "Forbidden",
   "path": "/admin/test"
}

该格式不符合公司接口规范；
需要修改为：

{
    "code": 403,
    "message": "FORBIDDEN",
    "timestamp": 1537340969670
}

添加自定义处理器：

public class RestAuthenticationAccessDeniedHandler implements AccessDeniedHandler {
    @Override
    public void handle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AccessDeniedException e) throws IOException, ServletException {
        httpServletResponse.setStatus(HttpServletResponse.SC_FORBIDDEN);

        PrintWriter writer = httpServletResponse.getWriter();
        writer.println("403");
    }
}

注入bean：

@Bean
public AccessDeniedHandler getAccessDeniedHandler() {
    return new RestAuthenticationAccessDeniedHandler();
}

修改 WebSecurityConfig 类configure 方法内的：

    httpSecurity.exceptionHandling().accessDeniedHandler(getAccessDeniedHandler());

注：

WebSecurityConfig 继承自 WebSecurityConfigurerAdapter