設計Restful介面

SpringMVC整合Spring

1. 在web.xml中配置DispatcherServlet
2. 建立web包
3. 建立spring-web.xml配置檔案

4. 在spring-web.xml進行SpringMVC的配置

   • 開啟SpringMVC註解模式
   • servlet-mapping對映路徑
   • 配置jsp顯示viewResolver

   • 掃描web相關的bean

     <beans xmlns="http://www.springframework.org/schema/beans"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      
     
          xmlns:mvc="http://www.springframework.org/schema/mvc"
          xmlns:conext="http://www.springframework.org/schema/context"
          xsi:schemaLocation="http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans.xsd
          http://www.springframework.org/schema/mvc
          http://www.springframework.org/schema/mvc/spring-mvc.xsd
          http://www.springframework.org/schema/context
          http://www.springframework.org/schema/context/spring-context.xsd"
      
     >
          <!--配置Spring MVC-->
          <!--開啟SpringMVC註解模式-->
          <!--簡化配置
           1、自動註冊DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter
           2、提供一系列功能：資料繫結，數字和日期的轉化@NumberFormat,@DataTimeFormat
               xml,json預設讀寫支援
          -->
           <mvc:annotation-driven/>
     
           <!--servlet-mapping對映路徑-->
      
     
           <!--靜態資源預設servlet配置
               1、加入對靜態資源的處理：js，css，img
               2、允許使用/做整體對映
           -->
           <mvc:default-servlet-handler/>
     
           <!--配置jsp顯示viewResolver-->
           <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
               <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
               <property name="prefix" value="/WEB-INF/jsp"/>
               <property name="suffix" value=".jsp"/>
           </bean>
     
           <!--掃描web相關的bean-->
           <conext:component-scan base-package="org.seckill.web"/>
     
     </beans>

實現秒殺相關的Restful介面

1. 建立控制類SecKillController，實現獲取列表，獲取單條資料，獲取系統時間，獲取秒殺地址，秒殺的方法

   @Controller
   @RequestMapping("/seckill/")//模組/資源
   public class SecKillController {
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
     @Autowired
     private SecKillService secKillService;
   
    @RequestMapping(name="/list",method= RequestMethod.GET)
    public String list(Model model){
        List<SecKill> list = secKillService.getSecKillList();
        model.addAttribute("list",list);
        return "list";
    }
   
     @RequestMapping(value="/{secKillId}/detail",method=RequestMethod.GET)
     public String detail(@PathVariable("secKillId") Long secKillId,Model model){
         if(secKillId == null){
             return "redirect:/seckill/list";
         }
   
         SecKill secKill = secKillService.getById(secKillId);
   
         if(secKill == null){
             return "redirect:/seckill/list";
         }
   
         model.addAttribute("secKill",secKill);
         return "detail";
     }
   
     @RequestMapping(value="/{secKillId}/exposer",method = RequestMethod.POST,
         produces = {"application/json;charset=utf-8"})
     @ResponseBody
     public SecKillResult<Exposer> exposer(@PathVariable("secKillId") Long secKillId){
         SecKillResult<Exposer> result = null;
   
         try{
             Exposer exposer = secKillService.exportSecKillUrl(secKillId);
             result = new SecKillResult<Exposer>(true,exposer);
   
         }catch(Exception e){
             logger.error(e.getMessage(),e);
             result = new SecKillResult<Exposer>(false,e.getMessage());
         }
   
         return result;
     }
   
     @RequestMapping(value="/{secKillId}/{md5}/execution",
     method = RequestMethod.POST,
     produces = {"application/json;charset=utf-8"})
     public SecKillResult<SecKillExecution> excute(@PathVariable("secKillId") Long secKillId,
                                                   @PathVariable("md5") String md5,
                                            @CookieValue(value="killPhone",required = false) Long userPhone){
         //springmvc valid
         if(userPhone == null){
             return new SecKillResult<SecKillExecution>(false,"未註冊");
         }
   
         SecKillResult<SecKillExecution> result = null;
   
         try{
             SecKillExecution secKillExecution = secKillService.executeSecKill(secKillId,userPhone,md5);
             result = new SecKillResult<SecKillExecution>(true,secKillExecution);
   
         }catch(RepeatKillException e){
             SecKillExecution secKillExecution = new SecKillExecution(secKillId, SecKillStatEnum.REPEAT);
             result = new SecKillResult<SecKillExecution>(false,secKillExecution);
   
         }catch(SecKillCloseException e){
             SecKillExecution secKillExecution = new SecKillExecution(secKillId, SecKillStatEnum.END);
             result = new SecKillResult<SecKillExecution>(false,secKillExecution);
   
         }catch(Exception e){
             logger.error(e.getMessage(),e);
             SecKillExecution secKillExecution = new SecKillExecution(secKillId, SecKillStatEnum.INNER_ERROR);
             result = new SecKillResult<SecKillExecution>(false,secKillExecution);
         }
   
         return result;
     }
   
     @RequestMapping(value="/time/now",method=RequestMethod.GET)
     public SecKillResult<Long> time(){
         Date now = new Date();
         return new SecKillResult<Long>(true,now.getTime());
   
     }
   }