實現自定義攔截器，實現登錄驗證,實現自定義mvc配置

實現自定義攔截器，實現登錄驗證

package com.hadwinling.myblog.mvc;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

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

/**
 * @author HadwinLing
 * @version V1.0
 * @Package com.hadwinling.myblog.mvc
 * @date 2020/7/3 9:36
 * 實現自定義攔截器，實現登錄驗證
 */
@Component
public class UriInterceptor implements HandlerInterceptor {

    /**
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     * 在請求處理之前進行攔截
     * 如果是已登錄 放行 返回true
     * 如果是沒登陸狀態 不放行 返回false 去登錄
     * 自定義對哪些請求進行攔截
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //獲取登錄的Uri
        String requestURI = request.getRequestURI();
        //登錄請求放心
        //根據項目定義需要攔截的請求
        if (requestURI.endsWith("/")
                ||requestURI.endsWith("/index")
                ||requestURI.endsWith("/user/loginWithNicknameAndPassword")
                ||requestURI.endsWith("/user/toLoginPage")
                ||requestURI.endsWith("/user/resetSend")
                ||requestURI.endsWith("/user/LoginWithTel")){
            //如果是登錄請求或者不需要登錄的請求進行放行
            return true;
        }
        //判斷用戶是否已經登錄
        HttpSession session = request.getSession();
        Object currUser = session.getAttribute("currUser");
        if (currUser!=null){
            //已登錄
            return true;
        }

        //未登錄 要求用戶去登錄
        request.getRequestDispatcher("/user/toLoginPage").forward(request,response);
        return false;
    }
}

實現自定義mvc配置

package com.hadwinling.myblog.mvc;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * @author HadwinLing
 * @version V1.0
 * @Package com.hadwinling.myblog.mvc
 * @date 2020/7/3 9:25
 * 實現自定義mvc配置
 */
@Configuration
public class WebMvc implements WebMvcConfigurer {

    @Autowired
    private UriInterceptor uriInterceptor;

    @Autowired
    private AdminUriInterceptor adminUriInterceptor;
    /**
     * 給指定頁面添加控制器
     * @param registry
     */
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        //給指定的試圖田間url請求映射
        //http://localhost:8080/blog/admin/
        registry.addViewController("/admin/").setViewName("/AdminCenter/login");
        registry.addViewController("/admin/toLoginPage").setViewName("/AdminCenter/login");

    }

    /**
     * 添加攔截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(uriInterceptor)
                .addPathPatterns("/**") //表示攔截所有請求
                .excludePathPatterns("/user/toLogin","/")  //不攔截哪些請求
                .excludePathPatterns("/js/**") //靜態資源不攔截
                .excludePathPatterns("/css/**")
                .excludePathPatterns("/images/**")
                .excludePathPatterns("/dist/**")
                .excludePathPatterns("/bower_components/**");
        
    }
}