攔截器中獲取restful風格參數

controller層：

    @GetMapping(value = "/api/users/{device}")
    public ResultDO get(@PathVariable("device") String device){
        ***
    }        

攔截器中：

public class ParameterInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //傳統方式獲取
        String device = request.getParameter("device");
        System.out.println("傳統方式獲取device： \t" + device);
        //map方式
        Map map = (Map) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
        System.out.println("map封裝格式： \t" + map);
        return true;
    }
    ***
}       

配置攔截器：

@Configuration
public class MyWebMvcConfig implements WebMvcConfigurer {

    @Autowired
    private ParameterInterceptor parameterInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(parameterInterceptor).addPathPatterns("/api/users/**");
    }

    @Bean
    public ParameterInterceptor parameterInterceptor(){
        return new ParameterInterceptor();
    }
}

運行sprinboot項目訪問訪問 URL: http://127.0.0.1:8080/api/users/andriod 測試，查看控制台輸出：

傳統方式獲取device： 	null
map封裝格式： 	{device=andriod}

說明request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE)這種方式能獲取到restful風格的參數