拦截器中获取restful风格参数

Posted 2021-03-18 youngyajun

controller层：

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

拦截器中：

public class ParameterInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //传统方式获取
        String device = request.getParameter("device");
        System.out.println("传统方式获取device： 	" + device);
        //map方式
        Map map = (Map) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
        System.out.println("map封装格式： 	" + map);
        return true;
    }
    ***
}       

配置拦截器：

@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();
    }
}

运行sprinboot项目访问访问 URL: http://127.0.0.1:8080/api/users/andriod 测试，查看控制台输出：

传统方式获取device：   null
map封装格式：    {device=andriod}

说明request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE)这种方式能获取到restful风格的参数