秒杀系统-web

整合配置Spring MVC框架：在web.xml中进行我们前端控制器DispatcherServlet的配置，配置springMVC需要加载的配置文件spring-dao.xml,spring-service.xml和spring-web.xml，详细配置如下。web.xml：<servlet> ???<servlet-name>seckill-dispatcher</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> ????????<init-param> ????????<param-name>contextConfigLocation</param-name> ????????<param-value>classpath:spring/spring-*.xml</param-value> ????</init-param></servlet><servlet-mapping> ????<servlet-name>seckill-dispatcher</servlet-name> ????<url-pattern>/</url-pattern></servlet-mapping>spring-web.xml：<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:context="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"> ???<mvc:annotation-driven/> ???<mvc:default-servlet-handler/> ???<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> ???<context:component-scan base-package="org.seckill.web"/></beans>完成Spring MVC的相关配置后，接下来就要基于Restful接口实现项目中的Controller开发。Controller中的每一个方法都对应我们系统中的一个资源URL，其设计应该遵循Restful接口的设计风格。在web包下创建一个SeckillController.java，内容如表6-11所示。

SeckillController.java：@Controller@RequestMapping("/seckill")public class SeckillController { ???private final Logger logger = LoggerFactory.getLogger(this.getClass()); ???@Autowired ???private SeckillService seckillService; ???@RequestMapping(value = "/list", method = RequestMethod.GET) ???public String list(Model model) { ???????List<Seckill> list = seckillService.getSeckillList(); ???????model.addAttribute("list", list); ???????//list.jsp + model = ModelAndView ???????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 "forward:/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 Long seckillId) { ???????SeckillResult<Exposer> result; ???????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"}) ???@ResponseBody ???public SeckillResult<SeckillExecution> execute(@PathVariable("seckillId") Long seckillId, ???@PathVariable("md5") String md5, ???@CookieValue(value = "killPhone", required = false) Long phone) { ???????//springmvc valid ???????if (phone == null) { ???????????return new SeckillResult<SeckillExecution>(false, "未注册"); ???????} ???????SeckillResult<SeckillExecution> result; ???????try { ???????????SeckillExecution execution = seckillService.executeSeckillProcedure(seckillId, phone, md5); ???????????return new SeckillResult<SeckillExecution>(true,execution); ???????} catch (RepeatKillException e) { ???????????SeckillExecution execution = new SeckillExecution(seckillId, SeckillStatEnum.REPEAT_KILL); ???????????return new SeckillResult<SeckillExecution>(true,execution); ???????} catch (SeckillCloseException e) { ??????????SeckillExecution execution = new SeckillExecution(seckillId, SeckillStatEnum.END); ???????????return new SeckillResult<SeckillExecution>(true,execution); ???????} catch (Exception e) { ???????????logger.error(e.getMessage(), e); ???????????SeckillExecution execution = new SeckillExecution(seckillId, SeckillStatEnum.INNER_ERROR); ???????????return new SeckillResult<SeckillExecution>(true,execution); ???????} ???} ???@RequestMapping(value = "/time/now",method = RequestMethod.GET) ???@ResponseBody ???public SeckillResult<Long> time(){ ???????Date now = new Date(); ???????return new SeckillResult(true,now.getTime()); ???}}json数据的一个Vo类，即SeckillResult.java，在dto包中创建它，内容如下。SeckillResult.java：public class SeckillResult<T> { ???private boolean success; ???private T data; ???private String error; ???public SeckillResult(boolean success, T data) { ???????this.success = success; ???????this.data = data; ???} ???public SeckillResult(boolean success, String error) { ???????this.success = success; ???????this.error = error; ???} ???public boolean isSuccess() { ???????return success; ???} ???public void setSuccess(boolean success) { ???????this.success = success; ???} ???public T getData() { ???????return data; ???} ???public void setData(T data) { ???????this.data = data; ???} ???public String getError() { ???????return error; ???} ???public void setError(String error) { ???????this.error = error; ???}}