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SpringBoot實現(xiàn)登錄攔截器的方法詳解

更新時間：2022年07月05日 10:54:09 作者：kiang斯

其實spring?boot攔截器的配置方式和springMVC差不多,只有一些小的改變需要注意下就ok了。本文主要給大家介紹了關(guān)于如何在Springboot實現(xiàn)登陸攔截器功能,需要的朋友可以參考下

在項目目錄下建立兩個包：inter 與contsfig

在inter新建層中實現(xiàn)HandlerInterceptor的繼承類

package com.example.gameboxadminserver.inter;

import com.example.gameboxadminserver.entity.User;
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;

public class MyInterceptor implements HandlerInterceptor {
	//在preHandle方法中進(jìn)行登錄判斷
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        //session.setAttribute("adminName","o");

        String adminName = (String)session.getAttribute("adminName");//獲取儲存的session
       //System.out.println(adminName);
        if(adminName==null){
            System.out.println("請先登陸！");
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        //System.out.println("執(zhí)行了TestInterceptor的postHandle方法");
    }


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

    }
}

在conrsfig中新增WebMvcConfiguer的繼承類LoginConfig

實現(xiàn)addInterceptors方法

package com.example.gameboxadminserver.contsfig;


import com.example.gameboxadminserver.inter.MyInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class LoginConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //注冊攔截器
        InterceptorRegistration registration = registry.addInterceptor(new MyInterceptor());
        registration.addPathPatterns("/**");                      //所有路徑都被攔截
        registration.excludePathPatterns(
                //添加不攔截路徑
                "/admin/adminLogin",
                
        );
    }
}

在serviceImpl層

實現(xiàn)登錄邏輯并保存session

Httpsession session

session.setAttribute(“name”,value);

package com.example.gameboxadminserver.service.impl;

import com.example.gameboxadminserver.entity.Admin;
import com.example.gameboxadminserver.entity.Result;
import com.example.gameboxadminserver.entity.ResultUtil;
import com.example.gameboxadminserver.mapper.AdminMapper;
import com.example.gameboxadminserver.service.AdminService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

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

/**
 * <p>
 *  服務(wù)實現(xiàn)類
 * </p>
 *
 * @author firstGroup
 * @since 2020-10-28
 */
@Service
public class AdminServiceImpl extends ServiceImpl<AdminMapper, Admin> implements AdminService {
    @Autowired
    AdminMapper adminMapper;
    @Override
    public Result adminLogin(HttpSession session,String adminName, String adminPwd) {
        Admin admin = adminMapper.adminLogin(adminName,adminPwd);
        if(admin!=null){
            session.setAttribute("adminName",adminName);
            return ResultUtil.success("登陸成功！");
        }
        return ResultUtil.error(2000,"登陸失敗");
    }
}

這樣就寫完啦

功能測試

登陸失敗