后端实现

  1. @RestController
  2. @RequestMapping("/system/config")
  3. public class SystemConfigController {
  4.     @Autowired
  5.     MenuService menuService;
  7.     @GetMapping("/menu")
  8.     public List<Menu> getMenusByHrId() {
  9.         return menuService.getMenusByHrId();
  10.     }
  11. }

getMenusByHrId()的sql语句如下：（根据hr的id查找到所有的额menu）

  1. select distinct m1.*,m2.`id` as id2,m2.`component` as component2,m2.`enabled` as enabled2,
  2.                 m2.`iconCls` as iconCls2,m2.`keepAlive` as keepAlive2,m2.`name` as name2,
  3.                 m2.`parentId` as parentId2,m2.`requireAuth` as requireAuth2,m2.`path` as path2 
  4. from menu m1,menu m2,hr_role hrr,menu_role mr 
  5. where m1.`id`=m2.`parentId` and hrr.`hrid`=3 
  6.       and hrr.`rid`=mr.`rid` and mr.`mid`=m2.`id` 
  7.       and m2.`enabled`=true 
  8. order by m1.`id`,m2.`id`

image.png

前端实现

在登录的时候，就访问后端并且拿到菜单数据存到store里，但是一刷新（f5）就没了，这时候有两种办法：

  1. 不存到store里，存到localStorage里。但是菜单资源非常敏感不建议保存到本地
  2. 在每个页面的mounted方法里都加载一次资源。但是这样工作量有点大。

所以使用导航守卫来简化方案2。下面是具体方法：

1.在store/index.js下配置store.state
image.png
2.在main.js里配置导航守卫
image.png

router.beforeEach((to, from, next) => {
    if (to.path == '/') {
        next();
    } else {
        if (window.sessionStorage.getItem("user")) {
            initMenu(router, store);
            next();
        } else {
            next('/?redirect=' + to.path);
        }
    }
})

3.在util/menus.js里

import {getRequest} from "./api";

export const initMenu = (router, store) => {
    if (store.state.routes.length > 0) {
        return;
    }
    getRequest("/system/config/menu").then(data => {
        if (data) {
            let fmtRoutes = formatRoutes(data);
            router.addRoutes(fmtRoutes);
            store.commit('initRoutes', fmtRoutes);
            store.dispatch('connect');
        }
    })
}
export const formatRoutes = (routes) => {
    let fmRoutes = [];
    routes.forEach(router => {
        let {
            path,
            component,
            name,
            meta,
            iconCls,
            children
        } = router;
        if (children && children instanceof Array) {
            children = formatRoutes(children);
        }
        let fmRouter = {
            path: path,
            name: name,
            iconCls: iconCls,
            meta: meta,
            children: children,
            component(resolve) {
                if (component.startsWith("Home")) {
                    require(['../views/' + component + '.vue'], resolve);
                } else if (component.startsWith("Emp")) {
                    require(['../views/emp/' + component + '.vue'], resolve);
                } else if (component.startsWith("Per")) {
                    require(['../views/per/' + component + '.vue'], resolve);
                } else if (component.startsWith("Sal")) {
                    require(['../views/sal/' + component + '.vue'], resolve);
                } else if (component.startsWith("Sta")) {
                    require(['../views/sta/' + component + '.vue'], resolve);
                } else if (component.startsWith("Sys")) {
                    require(['../views/sys/' + component + '.vue'], resolve);
                }
            }
        }
        fmRoutes.push(fmRouter);
    })
    return fmRoutes;
}

4.最后在home.vue里面实现页面渲染

<template>
    <div>
        <el-container>
            <el-header class="homeHeader">
                <div class="title">微人事</div>
                <div>
                    <el-button icon="el-icon-bell" type="text" style="margin-right: 8px;color: #000000;" size="normal"
                               @click="goChat"></el-button>
                    <el-dropdown class="userInfo" @command="commandHandler">
  <span class="el-dropdown-link">
    {{user.name}}<i><img :src="user.userface" alt=""></i>
  </span>
                        <el-dropdown-menu slot="dropdown">
                            <el-dropdown-item command="userinfo">个人中心</el-dropdown-item>
                            <el-dropdown-item command="setting">设置</el-dropdown-item>
                            <el-dropdown-item command="logout" divided>注销登录</el-dropdown-item>
                        </el-dropdown-menu>
                    </el-dropdown>
                </div>
            </el-header>
            <el-container>
                <el-aside width="200px">
                    <el-menu router unique-opened>
                        <el-submenu :index="index+''" v-for="(item,index) in routes" v-if="!item.hidden" :key="index">
                            <template slot="title">
                                <i style="color: #409eff;margin-right: 5px" :class="item.iconCls"></i>
                                <span>{{item.name}}</span>
                            </template>
                            <el-menu-item :index="child.path" v-for="(child,indexj) in item.children" :key="indexj">
                                {{child.name}}
                            </el-menu-item>
                        </el-submenu>
                    </el-menu>
                </el-aside>
                <el-main>
                    <el-breadcrumb separator-class="el-icon-arrow-right" v-if="this.$router.currentRoute.path!='/home'">
                        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
                        <el-breadcrumb-item>{{this.$router.currentRoute.name}}</el-breadcrumb-item>
                    </el-breadcrumb>
                    <div class="homeWelcome" v-if="this.$router.currentRoute.path=='/home'">
                        欢迎来到微人事！
                    </div>
                    <router-view class="homeRouterView"/>
                </el-main>
            </el-container>
        </el-container>
    </div>
</template>

<script>
    export default {
        name: "Home",
        data() {
            return {
                // user: JSON.parse(window.sessionStorage.getItem("user"))
            }
        },
        computed: {
            routes() {
                return this.$store.state.routes;
            },
            user() {
                return this.$store.state.currentHr;
            }
        },
        methods: {
            goChat() {
                this.$router.push("/chat");
            },
            commandHandler(cmd) {
                if (cmd == 'logout') {
                    this.$confirm('此操作将注销登录, 是否继续?', '提示', {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }).then(() => {
                        this.getRequest("/logout");
                        window.sessionStorage.removeItem("user")
                        this.$store.commit('initRoutes', []);
                        this.$router.replace("/");
                    }).catch(() => {
                        this.$message({
                            type: 'info',
                            message: '已取消操作'
                        });
                    });
                } else if (cmd == 'userinfo') {
                    this.$router.push('/hrinfo');
                }
            }
        }
    }
</script>

<style>
    .homeRouterView {
        margin-top: 10px;
    }

    .homeWelcome {
        text-align: center;
        font-size: 30px;
        font-family: 华文行楷;
        color: #409eff;
        padding-top: 50px;
    }

    .homeHeader {
        background-color: #409eff;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0px 15px;
        box-sizing: border-box;
    }

    .homeHeader .title {
        font-size: 30px;
        font-family: 华文行楷;
        color: #ffffff
    }

    .homeHeader .userInfo {
        cursor: pointer;
    }

    .el-dropdown-link img {
        width: 48px;
        height: 48px;
        border-radius: 24px;
        margin-left: 8px;
    }

    .el-dropdown-link {
        display: flex;
        align-items: center;
    }
</style>