• 用户管理，用户登录，登录校验（界面+接口）

• 用户管理功能
  用户表设计与持久层代码生成
  基本的增删改查
  用户名不能重复
  关于密码的两层加密处理：加密传输+加密存储
  重置密码

• 登录功能
  前端登录界面
  后端登录接口
  登录成功后的处理
  退出登录

• 登录校验
  接口登录校验
  界面登录校验

用户表设计与代码生成

-- 用户表
drop table if exists `user`;
create table `user` (
  `id` bigint not null comment 'ID',
  `login_name` varchar(50) not null comment '登陆名',
  `name` varchar(50) comment '昵称',
  `password` char(32) not null comment '密码',
  primary key (`id`),
  unique key `login_name_unique` (`login_name`)
) engine=innodb default charset=utf8mb4 comment='用户';

完成用户表基本增删改查功能

• 按照电子书管理，复制出一套用户管理的代码

用户名重复校验与自定义异常

• 自定义异常的使用
• 统一异常处理可以处理内置异常，也可以处理自定义异常
• 一般出现异常就表示程序（接口、线程）结束了，不要使用异常来处理逻辑，比如

  try {
  insert
  } catch {
  update
  }

• 使用!!user.id可以绕过前端类型校验

controller/ControllerExceptionHandler.java

import com.javami.wiki.exception.BusinessException;
import com.javami.wiki.resp.CommonResp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * 统一异常处理、数据预处理等
 */
@ControllerAdvice
public class ControllerExceptionHandler {

    private static final Logger LOG = LoggerFactory.getLogger(ControllerExceptionHandler.class);

    /**
     * 校验异常统一处理
     * @param e
     * @return
     */
    @ExceptionHandler(value = BindException.class)
    @ResponseBody
    public CommonResp validExceptionHandler(BindException e) {
        CommonResp commonResp = new CommonResp();
        LOG.warn("参数校验失败：{}", e.getBindingResult().getAllErrors().get(0).getDefaultMessage());
        commonResp.setSuccess(false);
        commonResp.setMessage(e.getBindingResult().getAllErrors().get(0).getDefaultMessage());
        return commonResp;
    }

    /**
     * 校验异常统一处理
     * @param e
     * @return
     */
    @ExceptionHandler(value = BusinessException.class)
    @ResponseBody
    public CommonResp validExceptionHandler(BusinessException e) {
        CommonResp commonResp = new CommonResp();
        LOG.warn("业务异常：{}", e.getCode().getDesc());
        commonResp.setSuccess(false);
        commonResp.setMessage(e.getCode().getDesc());
        return commonResp;
    }

    /**
     * 校验异常统一处理
     * @param e
     * @return
     */
    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public CommonResp validExceptionHandler(Exception e) {
        CommonResp commonResp = new CommonResp();
        LOG.error("系统异常：", e);
        commonResp.setSuccess(false);
        commonResp.setMessage("系统出现异常，请联系管理员");
        return commonResp;
    }
}

exception/BusinessException.java

public class BusinessException extends RuntimeException{

    private BusinessExceptionCode code;

    public BusinessException (BusinessExceptionCode code) {
        super(code.getDesc());
        this.code = code;
    }

    public BusinessExceptionCode getCode() {
        return code;
    }

    public void setCode(BusinessExceptionCode code) {
        this.code = code;
    }

    /**
     * 不写入堆栈信息，提高性能
     */
    @Override
    public Throwable fillInStackTrace() {
        return this;
    }
}

exception/BusinessExceptionCode.java

public enum BusinessExceptionCode {

    USER_LOGIN_NAME_EXIST("登录名已存在"),
    ;

    private String desc;

    BusinessExceptionCode(String desc) {
        this.desc = desc;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }
}

修改的时候，设置user.setLoginName(null);用户名不允许修改

 // 更新
user.setLoginName(null);
userMapper.updateByPrimaryKeySelective(user);

关于密码的两层加密处理

• 概念：MD5加密，盐值
• 基本的密码安全性设计：加密传输 + 加密存储

md5.js

var KEY = "!@#QWERT";
/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hexMd5(s) {
  return hex_md5(s);
}
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

/*
 * These functions implement the four basic operations the algorithm uses.
 */
function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Calculate the HMAC-MD5, of a key and some data
 */
function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left.
 */
function bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert a string to an array of little-endian words
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
 */
function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

/*
 * Convert an array of little-endian words to a string
 */
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

/*
 * Convert an array of little-endian words to a hex string.
 */
function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of little-endian words to a base-64 string
 */
function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}

增加重置密码功能

• 修改用户时，不能修改密码
• 单独开发重置密码表单和接口

// 更新
user.setLoginName(null);
user.setPassword(null);
userMapper.updateByPrimaryKeySelective(user);

<a-form-item label="密码" v-show="!user.id">
        <a-input v-model:value="user.password" />
</a-form-item>

单点登录token与JWT介绍

登录

• 前端输入用户名密码
• 校验用户名密码
• 生成token
• 后端保存token（redis）
• 前端保存token

校验

• 前端请求时，带上token（放在header）
• 登录拦截器，校验token（到redis获取token）
• 校验成功则继续后面的业务
• 校验失败则回到登录页面

单点登录系统

• 淘宝 支付宝
• A B C…
• X：用户管理、登录、登录校验、退出登录

token与JWT

• token+redis：token是无意义的
• JWT：token是有意义的，加密的，包含业务信息，一般是用户信息，可以被解出来
• 登录标识：就是令牌，就是token，就是一串唯一的字符串

  <dependency>
      <groupId>com.auth0</groupId>
      <artifactId>java-jwt</artifactId>
      <version>3.5.0</version>
  </dependency>

JwtUtil.sign
JwtUtil.verity

登录功能开发

• 后端增加登录接口
• 前端增加登录模态框

登录成功处理&集成vuex

后端保存用户信息

• 集成redis
• 登录成功后，生成token，以token为key，以用户信息为value，放入redis中

@PostMapping("/login")
    public CommonResp login(@Valid @RequestBody UserLoginReq req) {
        req.setPassword(DigestUtils.md5DigestAsHex(req.getPassword().getBytes()));
        CommonResp<UserLoginResp> resp = new CommonResp<>();
        UserLoginResp userLoginResp = userService.login(req);


        Long token = snowFlake.nextId();
        LOG.info("生成单点登录token：{}，并放入redis中", token);
        userLoginResp.setToken(token.toString());
        redisTemplate.opsForValue().set(token, JSONObject.toJSONString(userLoginResp), 3600 * 24, TimeUnit.SECONDS);
        resp.setContent(userLoginResp);
        return resp;
    }

前端显示登录用户

• header显示登录昵称
• 使用vuex+sessionStorage保存登录信息

import { createStore } from 'vuex'

const store = createStore({
  state: {
    user: {}
  },
  mutations: {
    setUser (state, user) {
      state.user = user;
    }
  },
  actions: {
  },
  modules: {
  }
});

export default store;

sessionStorage保存登录信息

import { createStore } from 'vuex'

declare let SessionStorage: any;
const USER = "USER";

const store = createStore({
  state: {
    user: SessionStorage.get(USER) || {}
  },
  mutations: {
    setUser (state, user) {
      state.user = user;
      SessionStorage.set(USER, user);
    }
  },
  actions: {
  },
  modules: {
  }
});

export default store;

集成Redis

• 加入依赖
• 配置Redis地址、端口、密码等
• 使用RedisTemplate操作

# redis配置
spring.redis.host=r-uf6ljbcdaxobsifyctpd.redis.rds.aliyuncs.com
spring.redis.port=6379
spring.redis.password=Redis000

概念：序列化

• DUBBO是RPC框架，就用到了序列化技术，比如：
• 从A应用的类传到B应用去执行

使用vuex存储全局变量

增加退出登录功能

• 目标：将token置为失效
• 后端增加退出登录接口，退出后，清除redis用户信息
• 前端增加退出登录按钮，退出后，清除前端用户信息

程序设计小技巧：只要有按钮（操作），就要考虑需不需要有确认

// 退出登录
      const logout = () => {
        console.log("退出登录开始");
        axios.get('/user/logout/' + user.value.token).then((response) => {
          const data = response.data;
          if (data.success) {
            message.success("退出登录成功！");
            store.commit("setUser", {});
          } else {
            message.error(data.message);
          }
        });
      };

后端接口增加登录校验

• 每个接口个性化的参数，放在请求的body里。所有接口通用的参数，放在header里面，如token
• 拦截器优势：可以针对URL来配置拦截规则
• 拦截器配置的URL是可以模糊匹配的，如：/all/**
• 拦截器指定URL&排除URL
  addPathPatterns
excludePathPatterns
• redis的key的类型，放进去和取出来要统一
  比如放进去是字符串”123”，要取出来用数值123是取不到的

后端增加拦截器，校验token有效性

config/SpringMvcConfig.java

package com.javami.wiki.config;

import com.javami.wiki.interceptor.LoginInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.annotation.Resource;

@Configuration
public class SpringMvcConfig implements WebMvcConfigurer {

    @Resource
    LoginInterceptor loginInterceptor;

    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(loginInterceptor)
                .addPathPatterns("/**")
                .excludePathPatterns(
                        "/test/**",
                        "/redis/**",
                        "/user/login",
                        "/category/all",
                        "/ebook/list",
                        "/doc/all/**",
                        "/doc/find-content/**"
                );
    }
}

interceptor/LoginInterceptor.java

package com.javami.wiki.interceptor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 拦截器：Spring框架特有的，常用于登录校验，权限校验，请求日志打印
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {

    private static final Logger LOG = LoggerFactory.getLogger(LoginInterceptor.class);

    @Resource
    private RedisTemplate redisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 打印请求信息
        LOG.info("------------- LoginInterceptor 开始 -------------");
        long startTime = System.currentTimeMillis();
        request.setAttribute("requestStartTime", startTime);

        // OPTIONS请求不做校验,
        // 前后端分离的架构, 前端会发一个OPTIONS请求先做预检, 对预检请求不做校验
        if(request.getMethod().toUpperCase().equals("OPTIONS")){
            return true;
        }

        String path = request.getRequestURL().toString();
        LOG.info("接口登录拦截：，path：{}", path);

        //获取header的token参数
        String token = request.getHeader("token");
        LOG.info("登录校验开始，token：{}", token);
        if (token == null || token.isEmpty()) {
            LOG.info( "token为空，请求被拦截" );
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            return false;
        }
        Object object = redisTemplate.opsForValue().get(token);
        if (object == null) {
            LOG.warn( "token无效，请求被拦截" );
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            return false;
        } else {
            LOG.info("已登录：{}", object);
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        long startTime = (Long) request.getAttribute("requestStartTime");
        LOG.info("------------- LoginInterceptor 结束 耗时：{} ms -------------", System.currentTimeMillis() - startTime);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//        LOG.info("LogInterceptor 结束");
    }
}

前端请求增加token参数
src/main.ts

import {Tool} from "@/util/tool";

/**
 * axios拦截器
 */
axios.interceptors.request.use(function (config) {
    const token = store.state.user.token;
    if (Tool.isNotEmpty(token)) {
        config.headers.token = token;
        console.log("请求headers增加token:", token);
    }
    return config;
}, error => {
    return Promise.reject(error);
});
axios.interceptors.response.use(function (response) {
    console.log('返回结果：', response);
    return response;
}, error => {
    console.log('返回错误：', error);
    return Promise.reject(error);
});

前端界面增加登录校验

未登录时，管理菜单要隐藏

<a-menu-item key="/">
  <router-link to="/">首页</router-link>
</a-menu-item>
<a-menu-item key="/admin/user" :style="user.id? {} : {display:'none'}">
  <router-link to="/admin/user">用户管理</router-link>
</a-menu-item>
<a-menu-item key="/admin/ebook" :style="user.id? {} : {display:'none'}">
  <router-link to="/admin/ebook">电子书管理</router-link>
</a-menu-item>
<a-menu-item key="/admin/category" :style="user.id? {} : {display:'none'}">
  <router-link to="/admin/category">分类管理</router-link>
</a-menu-item>
<a-menu-item key="/about">
  <router-link to="/about">关于我们</router-link>
</a-menu-item>

• 对路由做判断，防止用户通过手敲url访问管理页面

• 使用meta自定义路由属性
• 前端路由拦截器的写法

import { createRouter, createWebHistory, RouteRecordRaw } from 'vue-router'
import Home from '../views/home.vue'
import About from '../views/about.vue'
import Doc from '../views/doc.vue'
import AdminUser from '../views/admin/admin-user.vue'
import AdminEbook from '../views/admin/admin-ebook.vue'
import AdminCategory from '../views/admin/admin-category.vue'
import AdminDoc from '../views/admin/admin-doc.vue'
import store from "@/store";
import {Tool} from "@/util/tool";

const routes: Array<RouteRecordRaw> = [
  {
    path: '/',
    name: 'Home',
    component: Home
  },
  {
    path: '/doc',
    name: 'Doc',
    component: Doc
  },
  {
    path: '/about',
    name: 'About',
    component: About
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    // component: () => import(/* webpackChunkName: "about" */ '../views/about.vue')
  },
  {
    path: '/admin/user',
    name: 'AdminUser',
    component: AdminUser,
    meta: {
      loginRequire: true
    }
  },
  {
    path: '/admin/ebook',
    name: 'AdminEbook',
    component: AdminEbook,
    meta: {
      loginRequire: true
    }
  },
  {
    path: '/admin/category',
    name: 'AdminCategory',
    component: AdminCategory,
    meta: {
      loginRequire: true
    }
  },
  {
    path: '/admin/doc',
    name: 'AdminDoc',
    component: AdminDoc,
    meta: {
      loginRequire: true
    }
  },
]

const router = createRouter({
  history: createWebHistory(process.env.BASE_URL),
  routes
})

// 路由登录拦截
router.beforeEach((to, from, next) => {
  // 要不要对meta.loginRequire属性做监控拦截
  if (to.matched.some(function (item) {
    console.log(item, "是否需要登录校验：", item.meta.loginRequire);
    return item.meta.loginRequire
  })) {
    const loginUser = store.state.user;
    if (Tool.isEmpty(loginUser)) {
      console.log("用户未登录！");
      next('/');
    } else {
      next();
    }
  } else {
    next();
  }
});

export default router

逻辑：在每一次的跳转之前，to：新路由，from：旧路由，next：是一个方法。

if (to.matched.some(function (item) {
    console.log(item, "是否需要登录校验：", item.meta.loginRequire);
    return item.meta.loginRequire
  })) {

如果返回的是True，说明我要做路由校验，往下走！判断loginUser是否为空，如果为空，就表示用户没有登录，直接跳转回首页，如果已经登录，那么就往后面的逻辑走。

else{
//否则就是继续走旧的逻辑
}

用户密码初始化

前端校验与后端校验

• 后端校验：必须，防止别人绕过界面直接调用接口。
• 前端校验：非必须，可减少服务器压力

Ant Design Vue表单校验

• https://2x.antdv.com/components/form-cn