@PathVariable和@RequestBody/@RequestParam结合使用

清疚 2024-03-17 19:06 129阅读 0赞

### @PathVariable和@RequestBody/@RequestParam结合使用 ###

当总的业务逻辑类型相同，
    具体业务逻辑不同时（譬如乘车：高铁，汽车，自驾），
    使用注解@PathVariable和@RequestBody/@RequestParam可创建统一入口，
    然后根据SpringContextUtils找到具体的实现类，
    既精简了Rest代码又利于代码扩展

**举例说明：**

/**
     * @description:
     * @author: 码上得天下
     * @create: 2019-10-22 10:42
     **/
    @RestController
    public class TransportTest {
     
        /***
        * @Description:
         * /transportation/highspeedrail
         * /transportation/bus
         * /transportation/car
        */
        @RequestMapping(value ="/transportation/{choice}",method = RequestMethod.GET)
        public Result transportation(@PathVariable("choice") String choice, @RequestBody Map map){
            // 拿到具体交通方式的bean （可根据choice创建枚举，自定义bean）
            TransportService transportService = (TransportService) SpringContextUtils.getBean(choice);
            // 执行具体交通方式的具体流程
            Map resultMap = (Map) transportService.transport(map);
            return new Result("1","请求成功",resultMap);
        }
    }
     
     
    @Component
    public class SpringContextUtils implements ApplicationContextAware {
     
    	private static ApplicationContext applicationContext;
    	@Override
    	public void setApplicationContext(ApplicationContext applicationContext)
    			throws BeansException {
    		SpringContextUtils.applicationContext = applicationContext;
     
    	}
     
    	/**
    	 * 根据beanId获取Bean
    	 * @param beanId
    	 * @return Object
    	 */
    	public static Object getBean(String beanId){
    		try{
    			return applicationContext.getBean(beanId);
    		}catch(Exception be){
    			return null;
    		}
    	}
     
    	public static <T> T getBean(Class<T> clazz) {
    		try {
    			return applicationContext.getBean(clazz);
    		} catch (Exception e) {
    			return null;
    		}
    	}
    }
     
     
    public interface TransportService<T> {
        public T transport(Map map);
    }