分页 查询 搜索

1.认证请求

 request.js页面

import axios from "axios";
import {Message} from "element-ui";
import router from "@/router";

function request(url,data,method="post"){
    //promise表示承诺，将来我会执行什么，里面是一个方法，方法有两个参数
    return new Promise((resolve,reject)=>{
        axios({
            method,
            url:'http://localhost:8080/'+url,
            data,
            headers:{'Authorization':localStorage.token},
        }).then( (response)=> {
            if (response.data.success){
                resolve (response.data.data);
            }else {
                Message.error(response.data.message);
                console.info(response.data.message)
                router.push('/login')
                reject();
            }
        })
         .catch( (error) =>{
              Message.error("网络故障"+error);
              router.push('/login')
               reject();
            });



    })

}

export default request;

拦截器里面做跨域预检

package cn.hx.property.interceptor;

import cn.hx.property.entity.User;
import cn.hx.property.util.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

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

@Component
public class LoginInterceptor implements HandlerInterceptor {
    public static final String tokenName = "Authorization";
    @Autowired
    RedisUtil<User> redisUtil;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String requestURI = request.getRequestURI();
        //request.getSession() 前端和后端不再一个项目时反请求是跨域的，跨域时不能携带 cookie
        String token = request.getHeader(tokenName);
        String method = request.getMethod();
        if (method.equals("OPTIONS")){//跨域时浏览器会发送一个请求，（预检请求，他的请求方式是OPTIONS）
            //一旦请求返回不是200，浏览器就认为该请求不允许跨域，浏览器就不会发生真正的请求
            return true;
        }
        User user = redisUtil.get("session:" + token);
        if (user!=null){//用户请求参数里面携带的token在redis里面有
            return true;
        }

        throw new RuntimeException("用户未登录");
    }
}

做页面表格，发axios请求

 

分页的后台代码

controller改一下

 service跟serviceImpl也要改

UserManager.vue页面

<template>
  <div>
    <h1>用户管理</h1>
<!--    查询栏-->
    <el-form :inline="true" :model="formInline" size="medium" >
      <el-form-item>
        <el-button type="primary" size="medium">添加</el-button>
      </el-form-item>
      <el-form-item label="用户名">
        <el-input v-model="formInline.username" placeholder="用户名"></el-input>
      </el-form-item>
      <el-form-item label="电话">
        <el-input v-model="formInline.mobile" placeholder="电话"></el-input>
      </el-form-item>
      <el-form-item label="邮箱">
        <el-input v-model="formInline.email" placeholder="邮箱"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" size="small" @click="onSubmit">查询</el-button>
      </el-form-item>
    </el-form>
<!--    页面表格-->
<!--    @sort-change="sortChange"，sortable="custom"用来做排序-->
    <el-table :data="tableData" @sort-change="sortChange">
      <el-table-column sortable="custom" prop="userId" label="用户ID" width="140">
      </el-table-column>
      <el-table-column sortable="custom" prop="username" label="用户名" width="120">
      </el-table-column>
      <el-table-column sortable="custom" prop="mobile" label="手机号">
      </el-table-column>
      <el-table-column sortable="custom" prop="email" label="邮箱">
      </el-table-column>
      <el-table-column sortable="custom" prop="createTime" label="创建时间">
      </el-table-column>
      <el-table-column  label="状态">
        <template v-slot="scope"><!--状态栏修改按钮 插槽表达式-->
          <el-switch
              @change="switchChange(scope.row)"
              v-model="scope.row.status"
              active-color="#13ce66"
              inactive-color="#ff4949"
              :active-value="1"
              :inactive-value="0">
          </el-switch>
        </template>
      </el-table-column>

      <el-table-column label="操作">
        <el-button type="info" size="mini" >修改</el-button>
        <el-button type="danger" size="mini">删除</el-button>
      </el-table-column>
    </el-table>
    <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="page"
        :page-sizes="[2, 10, 20, 50]"
        :page-size="size"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
    </el-pagination>

  </div>
</template>

<script>
import request from "@/util/request";

export default {
  name: "UserManger",

  created() {
    this.loadData();
  },
  data() {
    return {
      page: 1,
      size: 2,
      tableData: [],
      total: 3,
      formInline:{}
    }
  }, methods: {
    async loadData() {
      let data = await request(`user/findAll?page=${this.page}&size=${this.size}`, {}, )
      this.tableData = data.list;
      this.total=data.total;
    },
    handleSizeChange(obj) {
      this.size = obj;
      this.loadData();
    },
    handleCurrentChange(obj) {
      this.page = obj;
      this.loadData();
    },
    async onSubmit(){
      let data = await request(`user/findAll?page=${this.page}&size=${this.size}`, this.formInline)
      this.tableData = data.list;
      this.total=data.total;
    },
    async sortChange(obj){
      console.info(obj)
      let orderBy
      if (obj.order === "ascending"){
        orderBy = obj.prop + ' asc'
      }else {
        orderBy = obj.prop + ' desc'
      }
      let data = await request(`user/findAll?page=${this.page}&size=${this.size}&orderBy=${orderBy}`, this.formInline)
      this.tableData = data.list;
      this.total=data.total;
    },
    //上面传过来一个对象，但是不需要他的全部属性，打一个{}解构赋值：只取里面的XXX属性
    async switchChange({userId,status}){
      let data = await request("user/update",{userId,status})
      if (data){
        this.$message("修改成功")
      }
    }
  }
}
</script>

<style scoped>

</style>

aop分页

@Component //放到容器内
@EnableAspectJAutoProxy
@Aspect
public class PropertyAspect {
    //将实体类字段转换对应的数据库字段，参数由前端发过来
    private String getOrderBy(String in){
        StringBuffer stringBuffer = new StringBuffer();
        char[] chars = in.toCharArray();
        for (char c : chars) {
            if (c <= 'Z' && c >= 'A'){
                stringBuffer.append('_');
                stringBuffer.append((char)(c + 32));
            }else {
                stringBuffer.append(c);
            }
        }
        return stringBuffer.toString();
    }

    //ProceedingJoinPoint 是针对 Around 环绕通知的形参，它可以获取原方法所有的细节
    //execution 表达式 任意返回* cn.hx.property.service.impl.*.queryAll(..)
    @Around("execution(* cn.hx.property.service.impl.*.queryAll(..))")
    public Object pageAop(ProceedingJoinPoint joinPoint) throws Throwable {
        //从 request里面获取page和size参数 orderBy
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        String page = request.getParameter("page");
        String size = request.getParameter("size");
        String orderBy = request.getParameter("orderBy");
        //分页后缓存到Redis的类型不能是 Page，必须是PageInfo，因为PageInfo才能保留分页信息
        if (StringUtils.hasText(page) && StringUtils.hasText(size)) {
            Page<Object> objects = PageHelper.startPage(Integer.parseInt(page), Integer.parseInt(size), StringUtils.hasText(orderBy) ? getOrderBy(orderBy) : null);
            joinPoint.proceed();//调用目标方法
            return new PageInfo<>(objects);
        }
        Object object = joinPoint.proceed();//调用目标方法
        return object;
    }