spring自定义注解！-蒲公英云

转载自//my.oschina.net/ffy/blog/114015

一下代码适用场景：1.表单不确定那些需要做防止重复提交 2.Controller 需要传同一个值（不确定那些需要；PS：如果Controller链接地址有规律可以用Filter统一直接刷到页面）

@interface

/** * 方法级 创建Token * User: Alec * Date: 13-3-15 * Time: 下午2:16 */ @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface Token { } /** * 方法级 检测重复提交 * User: Alec * Date: 13-3-15 * Time: 下午2:16 */ @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface CheckFormToken { } /** * 类级 右边栏 * User: Alec * Date: 13-3-15 * Time: 下午2:52 */ @Target(ElementType.TYPE) @Retention(RetentionPolicy.RUNTIME) public @interface RSidebar { }

Interceptor

/** * Created with IntelliJ IDEA. * User: Alec * Date: 13-3-15 * Time: 下午2:21 * To change this template use File | Settings | File Templates. */ public class RenderInterceptor implements HandlerInterceptor { @Autowired private CategoryService categoryService; @Autowired private TagService tagService; @Autowired private MenuQueryService menuQueryService; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { if (handler.getClass().isAssignableFrom(HandlerMethod.class)) { HandlerMethod handlerMethod = (HandlerMethod) handler; Object target = handlerMethod.getBean(); Token token= handlerMethod.getMethodAnnotation(Token.class); if(token != null ){ this.generateFormToken(request); } CheckFormToken checkFormToken = handlerMethod.getMethodAnnotation(CheckFormToken.class); if (checkFormToken != null) { if (!checkFormToken(request)) { throw new DuplicateSubmitFormException("表单重复提交!"); } else { generateFormToken(request); } } if (target.getClass().isAnnotationPresent(RSidebar.class)) { pageAddRightSidebar(request); } } return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } private boolean checkFormToken(HttpServletRequest request) { String token = request.getParameter(SessionConstants.TOKEN); HttpSession session = request.getSession(); String oldToken = (String) session.getAttribute(SessionConstants.TOKEN); return token.equals(oldToken); } private void generateFormToken(HttpServletRequest request) { String sessionId = request.getSession().getId(); String hashString = MD5.getHashString(System.currentTimeMillis() + sessionId); request.getSession().setAttribute(SessionConstants.TOKEN, hashString); } /** * 页面右侧栏 * * @return */ private void pageAddRightSidebar(HttpServletRequest request) { //加入顶级类目 List<Category> categoryBanner = categoryService.querySubCategories(0); request.setAttribute("categoryBanner", categoryBanner); //加入标签 List<Tag> tags = tagService.queryAllTag(); request.setAttribute("tags", tags); //加入一周推荐 List<Menu> menuRecommend = menuQueryService.queryMenuRecommendList(); request.setAttribute("menuRecommend", getMenuListWithMainPicture(menuRecommend)); } }

DuplicateSubmitFormException 自定义表单重复提交异常

/** * 表单重复提交异常 * User: Alec * Date: 13-3-15 * Time: 下午2:49 */ public class DuplicateSubmitFormException extends RuntimeException { private String message; public DuplicateSubmitFormException(String msg){ this.message = message; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } @Override public Throwable fillInStackTrace() { return this; } }

表单提交重复提交异常页面

/** * 表单提交重复提交异常 页面 * User: Alec * Date: 13-3-15 * Time: 下午2:52 */ public class SnsExceptionResolver implements HandlerExceptionResolver { private final Log logger = LogFactory.getLog(HandlerExceptionResolver.class); private String pagePath = "error/default"; private boolean developModel = false; @Override public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) { logger.error("发生一个系统异常", ex); ModelAndView modelAndView = new ModelAndView(); //这里是在发文章的时候 if (ex instanceof DuplicateSubmitFormException) { modelAndView.setViewName("addArticle"); } else { modelAndView.addObject("msg", ExceptionUtils.getFullStackTrace(ex)); modelAndView.addObject("developModel", developModel); modelAndView.setViewName(pagePath); } return modelAndView; } public String getPagePath() { return pagePath; } public void setPagePath(String pagePath) { this.pagePath = pagePath; } public boolean isDevelopModel() { return developModel; } public void setDevelopModel(boolean developModel) { this.developModel = developModel; } }

xml

<bean class="com.sns.web.utils.SnsExceptionResolver">
        <property name="developModel">
            <value>${develop}</value>
        </property>
    </bean>
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <bean class="com.sns.web.utils.RenderInterceptor"></bean>
        </mvc:interceptor>
    </mvc:interceptors>