filter、Interceptor

經過filter來將記住一個月以內的自動登陸，經過interceptor來將不在範圍以內的請求都讓其跳轉到指定的頁面好比登錄頁面

myFilter:

web.xml:

 <filter>

    <filter-name>myFilter</filter-name>

    <filter-class>com.chenghan.yun.mp.filter.SysFilter</filter-class>

    </filter>

    <!-- 只攔截.do請求 -->

    <filter-mapping>

    <filter-name>myFilter</filter-name>

    <url-pattern>*.do</url-pattern>

    </filter-mapping>

class:

public class SysFilter implements Filter {

    private IMpBasInfoService mpBasInfoService;

    private IBasDao basDao;

    @Override

    public void init(FilterConfig filterConfig) throws ServletException {

        //To change body of implemented methods use File | Settings | File Templates.

        ServletContext context = filterConfig.getServletContext();

        ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(context);

        mpBasInfoService = (IMpBasInfoService) ctx.getBean("mpBasInfoService");

        basDao =(IBasDao)ctx.getBean("basDao");

    }

    @Override

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        //To change body of implemented methods use File | Settings | File Templates.

        HttpServletRequest request = (HttpServletRequest) servletRequest;

        HttpSession session = request.getSession(true);

        String account = "";

        String sessionId = "";   // 此sessionid是上次用戶登陸時保存於用戶端的識別碼，用於用戶後續訪問的自動登陸。不是本次訪問的session id。

        Cookie[] cookies;

        CookieManager cm = new CookieManager(); // CookieManager是一個自定義的類，用於從Cookie數組中查找並返回指定名稱的Cookie值。

        boolean isAutoLogin;

        // 若是session中沒有user對象，則建立一個。

        CrmMicroBusinessCardVO crmMicroBusinessCardVO = (CrmMicroBusinessCardVO) session.getAttribute("crmMicroBusinessCardVO");

        // 若是user對象的username爲""，表示用戶未登陸。則執行自動登陸過程。

        // 不然不自動登陸。

        if (crmMicroBusinessCardVO == null) {

            crmMicroBusinessCardVO = new CrmMicroBusinessCardVO();

            // 檢查用戶瀏覽器是否發送了上次登陸的用戶名和sessionid，

            // 若是是，則爲用戶自動登錄。

            cookies = request.getCookies();

            if(cookies!=null&&cookies.length>0){

                account = cm.getCookieValue(cookies, "autoLoginUser");

                sessionId = cm.getCookieValue(cookies, "sessionId");

                account = "".equals(account)?null:account;

                sessionId = "".equals(sessionId)?null:sessionId;

                Map<String,Object> map = new HashMap<String,Object>();

                map.put("account", account);

                map.put("sessionId",sessionId);

                boolean isExist = basDao.isExist(MpAccountSessionId.class,map);

                if (isExist) {

                    MpBasInfo userVO = new MpBasInfo();

                    userVO = basDao.queryOne(MpBasInfo.class,"account",account);

                    if(userVO!=null){

                        CrmMicroBusinessCardVO crmMicroBusinessCardVO1 = new CrmMicroBusinessCardVO();

                        UtilBean.copyBeanAllSimpleProperties(crmMicroBusinessCardVO1,userVO,false);

                        session.setAttribute("crmMicroBusinessCardVO", crmMicroBusinessCardVO1); // 將user bean添加到session中。

                    }

                }

            }

        }

        filterChain.doFilter(servletRequest, servletResponse);

    }

    @Override

    public void destroy() {

        //To change body of implemented methods use File | Settings | File Templates.

    }

}

public class CookieManager {

    public static String getCookieValue(Cookie cookies[],String cookieName){

        String cookieValue = "";

        for(int i=0;i<cookies.length;i++){

            Cookie cookie = cookies[i];

            if(cookie.getName().equals(cookieName)){

                cookieValue = cookie.getValue().toString();

                break;

            }

        }

        return  cookieValue;

    }

}

interceptor:springMVC的

public class SimpleAcInterceptor implements HandlerInterceptor {

    public String[] allowUrls;//還沒發現能夠直接配置不攔截的資源，因此在代碼裏面來排除

    public void setAllowUrls(String[] allowUrls) {

        this.allowUrls = allowUrls;

    }

    @Override

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        String contextPath=request.getContextPath();

        String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+contextPath+"/";

        String requestUrl = request.getRequestURI().replace(contextPath, "");

        if(allowUrls == null){

            //設置模塊allowUril

            allowUrls = new String[]{"/login.html"};

        }

        if(null != allowUrls && allowUrls.length>=1){

            for(String url : allowUrls) {

                if(requestUrl.contains(url)) {

                    return true;

                }

            }

        }

        CrmMicroBusinessCardVO crmMicroBusinessCardVO = (CrmMicroBusinessCardVO) request.getSession().getAttribute("crmMicroBusinessCardVO");

        if(crmMicroBusinessCardVO == null){

            if (!(request.getHeader("accept").indexOf("application/json") > -1 ||

                    (request.getHeader("X-Requested-With")!= null &&

                            request.getHeader("X-Requested-With").indexOf("XMLHttpRequest") > -1))) {

                //非JSON請求

                response.sendRedirect(basePath + "login.html");

            }else{

                PrintWriter fs=response.getWriter();

                Map<String,String> map = new HashMap<String,String>();

                map.put("status","errors");

                map.put("message","系統超時，請從新登陸。");

                response.setContentType("application/json");

                fs.write(JsonUtils.getJsonString(map));

                fs.flush();

                fs.close();

            }

            return false;

        }

        return true;

    }

    @Override

    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

        //To change body of implemented methods use File | Settings | File Templates.

    }

    @Override

    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

        //To change body of implemented methods use File | Settings | File Templates.

    }

}

springMVC的配置文件

  <mvc:interceptors>

        <!-- session超時 -->

        <mvc:interceptor>

            <mvc:mapping path="/*"/>

            <bean class="com.chenghan.yun.mp.filter.SimpleAcInterceptor">

                <property name="allowUrls">

                    <list>

                        <!-- 若是請求中包含如下路徑，則不進行攔截 -->

                        <value>/login.html</value>

                        <value>/crm_micro_business_card_loginOut.html</value>

                        <value>/mp_ajax_vcf.html</value>

                        <value>/crm_micro_business_card_resetPassword_index_card.do</value>

                        <value>/crm_micro_business_card_resetPassword_card.do</value>

                        <value>/crm_micro_business_card_validate_index_card.do</value>

                        <value>/crm_micro_business_card_validate_card.do</value>

                        <value>/crm_micro_business_card_login_card.do</value>

                        <value>/crm_micro_business_card_registor_index_card.do</value>

                        <value>/crm_micro_business_card_validate_registor_card.do</value>

                        <value>/crm_micro_business_card_password_registor_card.do</value>

                        <value>/crm_micro_business_card_registor_setPassword_card.do</value>

                        <value>/business_card_businessCardFinishRegistor_index.do</value>

                        <value>/business_card_businessCardFinsishRegistor.json</value>

                        <value>/crm_micro_business_card_businessCard_index_card.do</value>

                        <value>/mp_ajax_vcf_index.html</value>

                        <value>/mp_ajax_vcf.html</value>

                        <value>/mp_save_relation.json</value>

                        <value>/crm_micro_business_card_detail.json</value>

                    </list>

                </property>

            </bean>

        </mvc:interceptor>

    </mvc:interceptors>