html 复制代码

<template>
  <div>

    <!-- 搜索栏 -->
    <el-card id="search">
      <el-row>
        <el-col :span="20">
          <el-input v-model="searchModel.name" placeholder="根据名字查询"></el-input>
          <el-input v-model="searchModel.email" placeholder="根据邮件查询"></el-input>
          <el-button @click="searchList" type="primary" round icon="el-icon-search">搜索</el-button>
        </el-col>

        <el-col :span="4">
          <el-button @click="openEditUI(null)" type="primary" icon="el-icon-plus" circle></el-button>
        </el-col>
      </el-row>
    </el-card>

    <!-- 结果列表 -->
    <el-table :data="userList" style="width: 100%">
      <el-table-column type="index" label="#" width="180">
        <template slot-scope="scope">
          {{ (searchModel.pageNo - 1) * searchModel.pageSize + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="id" label="用户id" width="180">
      </el-table-column>
      <el-table-column prop="name" label="姓名">
      </el-table-column>
      <el-table-column prop="age" label="年龄">
      </el-table-column>
      <el-table-column prop="email" label="电子邮件">
      </el-table-column>
      <el-table-column label="操作">

        <template slot-scope="scope">
          <el-button @click="openEditUI(scope.row.id)" type="primary" icon="el-icon-edit" circle></el-button>
          <el-button type="danger" icon="el-icon-delete" circle></el-button>
        </template>

      </el-table-column>
    </el-table>


    <!--  分页功能 -->
    <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
      :current-page="searchModel.pageNo" :page-sizes="[1, 5, 10, 15]" :page-size="searchModel.pageSize"
      layout="total, sizes, prev, pager, next, jumper" :total="total">
    </el-pagination>


    <!-- 对话框 -->
    <!-- Form -->

    <el-dialog :title="title" :visible.sync="dialogFormVisible">
      <el-form :model="userForm" :rules="rules">
        <el-form-item label="名字" :label-width="formLabelWidth">
          <el-input v-model="userForm.name" autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="age" :label-width="formLabelWidth">
          <el-input v-model="userForm.age" autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="email" :label-width="formLabelWidth">
          <el-input v-model="userForm.email" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>

      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="performAction">确 定</el-button>
      </div>
    </el-dialog>

  </div>
</template>
  
<script>
import axios from 'axios';
export default {

  data() {
    return {
      title: '添加',
      userForm: {
        name: '',
        age: '',
        email: ''
      },
      dialogFormVisible: false,
      total: 0,
      searchModel: {
        pageNo: 1,
        pageSize: 5,
        name: '',
        email: '',
      },
      userList: [],
      formLabelWidth: '50px', // 设置标签的宽度
      rules: {
        name: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ],
      },
    }
  },
  methods: {
    


    openEditUI(id) {
      if (id == null) {
        this.title = "新增用户";
        this.userForm = {
          name: '',
          age: '',
          email: ''
        };
      } else {
        this.title = "修改用户";
        // 根据id查询用户数据
        axios.get(`/api/sys/demoTable/` + id)
          .then(response => {
            this.userForm = response.data.data; // 填充编辑数据
            this.dialogFormVisible = true;
          })
          .catch(error => {
            console.error('获取编辑数据失败：', error);
          });
      }
      this.dialogFormVisible = true;
    },


    performAction() {
    if (this.title === '新增用户') {
      const newData = {
          name: this.userForm.name,
          age: this.userForm.age,
          email: this.userForm.email
        };

        axios.post('/api/sys/demoTable/create', newData)
          .then(response => {
            if (response.data.code == 1) {

              this.$message({
                message: '添加成功',
                type: 'success'
              });

              // 关闭对话框
              this.dialogFormVisible = false;
              // 可以更新列表，重新加载数据等操作

              // 重新加载数据
              this.getUserList();
            } else {
              console.error('数据添加失败');
            }
          })
          .catch(error => {
            console.error('添加数据失败：', error);
          });
    } else if (this.title === '修改用户') {
      axios.put(`/api/sys/demoTable/update`, this.userForm)
          .then(response => {
            if (response.data.code === 1) {
              this.$message({
                message: '更新成功',
                type: 'success'
              });
              this.dialogFormVisible = false;
              this.getUserList();
            } else {
              console.error('数据更新失败');
            }
          })
          .catch(error => {
            console.error('更新数据失败：', error);
          });
    }
  },




    // 分页大小变化
    handleSizeChange(pageSize) {
      this.searchModel.pageSize = pageSize;
      this.getUserList();
    },
    // 当前页码变化
    handleCurrentChange(pageNo) {
      this.searchModel.pageNo = pageNo;
      this.getUserList();
    },
    // 获取用户列表
    getUserList() {
      axios.get('/api/sys/demoTable/list', { params: this.searchModel })
        .then(response => {
          console.log(response);
          const data = response.data.data;
          this.userList = data.rows;
          this.total = data.total;
        })
        .catch(error => {
          console.error('获取用户列表失败：', error);
        });

    },

    searchList() {
      this.searchModel.pageNo = 1; // 重置页码为1，以获取新的查询结果

      // 构建查询参数
      const queryParams = {
        name: this.searchModel.name,
        email: this.searchModel.email,
        pageNo: this.searchModel.pageNo,
        pageSize: this.searchModel.pageSize
      };

      // 发送 GET 请求
      axios.get('/api/sys/demoTable/list', { params: queryParams })
        .then(response => {
          const data = response.data.data;
          this.userList = data.rows;
          this.total = data.total;
        })
        .catch(error => {
          console.error('获取用户列表失败：', error);
        });
    }


  },
  mounted() {
    // 初始化加载用户列表
    this.getUserList();
  }

}
</script>
  
  
<style>
#search .el-input {
  width: 300px;
  margin-right: 20px;
}
</style>

思路

关于查询和分页的结合分析

1.查询也就是在页面上显示数据，所以用到了分页。

用Mybatis-plus , 进行分页用Map返回数据，注意关键点pageNo和pageSize，这是前端请求头请求的数据，后端要返回一个查询到的结果集和总页数

java 复制代码

    @GetMapping("/list")
    public R<Map<String, Object>> getAllList(@RequestParam(value = "name", required = false) String name,
                                             @RequestParam(value = "email", required = false) String email,
                                             @RequestParam(value = "pageNo") Long pageNo,
                                             @RequestParam(value = "pageSize") Long pageSize) {

关于添加和修改的功能结合分析

* 添加按钮和修改按钮，共用一个对话框，用data：title，的值区分两个请求。

* 添加按钮：id为null 或 undifined,

而修改按钮id ：肯定是有值的。

*从而分别为title赋值，添加 | 修改，

在起一个方法，if （添加==添加）{

添加的请求

} else{

修改的请求

}

vue入门（增查改！）

思路

关于 查询和分页的结合分析

关于查询和分页的结合分析