實現需求：

1.使用者未登入，跳轉到登入頁，登入完成後會跳到初始訪問頁。

2.使用者自定義處理（如需要啟用），跳轉到啟用頁面，啟用完成後會跳到初始訪問頁。

使用到的框架

springmvc 的攔截器

shiro 自定義過濾器

實現：

1.編寫攔截器通過session儲存初始訪問的頁面地址，便於後面回跳這個頁面做準備。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 使用者登入以後跳轉回之前頁面的攔截器 攔截物件： 除登入，註冊之外的所有跳轉頁面的請求 因為使用者隨時可能進行登入操作
 *
 * @version 1.0.0
 * @date 2018 -10-19
 */
public class ForwardBeforeUrlInteceptor implements HandlerInterceptor {

	private Logger logger = LoggerFactory.getLogger(this.getClass());

	@Override
	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {

	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {

	}

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception {

		// 過濾掉ajax請求
		if (request.getHeader("x-requested-with") != null
				&& request.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")) {
			return true;
		}

		// 獲取當前會話
		HttpSession session = request.getSession(true);
		// 拿到上一個頁面地址
		String uri = request.getRequestURI();
		// 去掉專案地址長度的字元（因為我的預設專案地址是給出的）
		String path = uri.substring(request.getContextPath().length());
		// 得到引數
		String query = request.getQueryString();
		if (query == null) {
			query = "";
		} else {
			query = "?" + query;
		}
		String beforePath = path + query;
		session.setAttribute("beforePath", beforePath);
		session.setAttribute("method", request.getMethod());
		logger.debug("beforePath :{},  method:{}", beforePath, request.getMethod());
		return true;
	}
}
 

2.在spring的xml配置檔案中配置攔截器，例如application.xml

 <mvc:interceptors>
        <!-- 使用bean定義一個Interceptor，直接定義在mvc:interceptors根下面的Interceptor將攔截所有的請求 -->

        <!-- 配置用於跳回登入之前的頁面的攔截器-->
        <mvc:interceptor>
            <!-- 進行攔截：/**表示攔截所有url及其子路徑 -->
            <mvc:mapping path="/**" />
            <!-- ajax請求的action不進行攔截 -->
            <mvc:exclude-mapping path="/*.ajax" />
            <mvc:exclude-mapping path="/resources/**" />
            <mvc:exclude-mapping path="/activation" />
            <bean class="com.xxx.xxx.xxx.interceptor.ForwardBeforeUrlInteceptor" />
        </mvc:interceptor>
    </mvc:interceptors>
 

注意：<mvc:exclude-mapping path="/activation" /> 此處是介面可以直接進入啟用頁面，此處是排除攔截啟用頁面，防止頁面出現不停的回跳到自己頁面。

3.自定義過濾器。

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 課程攔截器,當會員過期或未啟用時自動跳轉到啟用頁面
 * 
 * @version 1.0.0
 * @date 2018 -10-19
 */
public class MemberFilter extends com.bwjf.framework.shiro.filter.UserFilter {

	@Override
	protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) {
		HttpServletResponse httpServletResponse = (HttpServletResponse) response;
		HttpServletRequest httpServletRequest = (HttpServletRequest) request;
		if (httpServletRequest.getRequestURI().indexOf("activation") > 0) {
			return true;
		}

		MyShiroUser myShiroUser = MyUserUtil.getCurrentShiroUser();
		if (!CheckEmptyUtil.isEmpty(myShiroUser) && CheckEmptyUtil.isEmpty(myShiroUser.getActiveDate())) {
			try {
            // 瀏覽器跳轉到啟用頁面
				httpServletResponse.sendRedirect(httpServletRequest.getContextPath() + "/activation");
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return true;

	}
}
 

4.shiro.xml配置自定義過濾器

5.controller啟用處理後跳轉到初始頁面