1.首先搭建ssm环境，这里默认已经搭好了

将css js配置到webapp下

2.在dao层中操作数据库，这里使用mybatis的通用Mapper

package com.mall.dao;

import com.mall.pojo.goods.Brand;
import tk.mybatis.mapper.common.Mapper;

public interface BrandMapper extends Mapper<Brand> {

}

3.在interface中编写增删改查等一系列的接口

package com.mall.service.goods;

import com.mall.entity.PageResult;
import com.mall.pojo.goods.Brand;

import java.util.List;
import java.util.Map;

public interface BrandService {
    public List<Brand> findAll();
    //分页查询
    public PageResult<Brand> findPage(int page,int size);
    //品牌条件查询
    public List<Brand> findList(Map<String ,Object> searchMap);
    //根据条件分页查询
    public PageResult<Brand> findPage(Map<String ,Object> searchMap,int page,int size);
    //根据id查询
    public Brand findById(Integer id);
    //新增
    public void add(Brand brand);
    //修改
    public void update(Brand brand);
    //删除
    public void delete(Integer id);

}

4.在实现类中实现

package com.mall.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.mall.dao.BrandMapper;
import com.mall.entity.PageResult;
import com.mall.pojo.goods.Brand;
import com.mall.service.goods.BrandService;
import org.springframework.beans.factory.annotation.Autowired;
import tk.mybatis.mapper.entity.Example;
import java.util.List;
import java.util.Map;

@Service
public class BrandServiceImpl implements BrandService {

    @Autowired
    private BrandMapper brandMapper;

    @Override
    public List<Brand> findAll() {
        return brandMapper.selectAll();
    }

    @Override
    public PageResult<Brand> findPage(int page, int size) {
        PageHelper.startPage(page,size);
        Page<Brand> pageResult = (Page<Brand>) brandMapper.selectAll();
        return new PageResult<>(pageResult.getTotal(),pageResult.getResult());
    }

    @Override
    public List<Brand> findList(Map<String, Object> searchMap) {
        Example example = createExample(searchMap);
        brandMapper.selectByExample(example);
        return brandMapper.selectByExample(example);
    }

    @Override
    public PageResult<Brand> findPage(Map<String, Object> searchMap, int page, int size) {
        PageHelper.startPage(page,size);
        Example example = createExample(searchMap);
        Page<Brand> pageResult = (Page<Brand>) brandMapper.selectByExample(example);
        return new PageResult<>(pageResult.getTotal(),pageResult.getResult());
    }

    @Override
    public Brand findById(Integer id) {
        return brandMapper.selectByPrimaryKey(id);
    }

    @Override
    public void add(Brand brand) {
        brandMapper.insert(brand);
    }

    @Override
    public void update(Brand brand) {
        //updateByPrimaryKeySelective null值会被忽略
        brandMapper.updateByPrimaryKeySelective(brand);
    }

    @Override
    public void delete(Integer id) {
        brandMapper.deleteByPrimaryKey(id);
    }


    private Example createExample(Map<String, Object> searchMap){
        Example example = new Example(Brand.class);
        Example.Criteria criteria = example.createCriteria();
        if(searchMap!= null){
            if (searchMap.get("name") != null && !"".equals(searchMap.get("name"))) {
                //模糊查询
                criteria.andLike("name","%"+(String) searchMap.get("name")+"%");
            }
            if (searchMap.get("letter") != null && !"".equals(searchMap.get("letter"))) {
                //精确匹配
                criteria.andEqualTo("letter",(String) searchMap.get("letter"));
            }
        }
        return example;
    }

}

5.在controller层中编写视图映射，这里使用resultful风格，并在浏览器中测试

package com.mall.controller.goods;

import com.alibaba.dubbo.config.annotation.Reference;
import com.mall.entity.PageResult;
import com.mall.entity.Result;
import com.mall.pojo.goods.Brand;
import com.mall.service.goods.BrandService;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/brand")
public class BrandController {

    @Reference
    private BrandService brandService;

    @RequestMapping("/findAll")
    public List<Brand> findAll(){
        return brandService.findAll();
    }

    @GetMapping("/findPage")
    public PageResult<Brand> findPage( int page, int size){
        return brandService.findPage(page,size);
    }

    @PostMapping("/findList")
    public List<Brand> findList(@RequestBody Map searchMap){
        return brandService.findList(searchMap);
    }

    @PostMapping("/findPage")
    public PageResult<Brand> findPage(@RequestBody Map searchMap,int page, int size){
        return brandService.findPage(searchMap,page,size);
    }

    @GetMapping("/findById")
    public Brand findById(Integer id){
        return brandService.findById(id);
    }

    @PostMapping("/add")
    public Result add(@RequestBody Brand brand){
        brandService.add(brand);
        return new Result();
    }

    @PostMapping("/update")
    public Result update(@RequestBody Brand brand){
        brandService.update(brand);
        return new Result();
    }

    @GetMapping("/delete")
    public Result delete(Integer id){
        brandService.delete(id);
        return new Result();
    }
}

6.测试通过后编写页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>品牌管理</title>
    <link rel="stylesheet" href="../css/elementui.css">
</head>
<body>
<div id="app">
    <el-form :inline="true">
        <el-form-item label="品牌名称">
            <el-input placeholder="品牌名称" v-model="searchMap.name"></el-input>
        </el-form-item>
        <el-form-item label="品牌首字母">
            <el-input placeholder="品牌首字母" v-model="searchMap.letter"></el-input>
        </el-form-item>
        <el-button type="primary" @click="fetchData">查询</el-button>
        <el-button type="primary" @click="pojo={},formVisible=true">新增</el-button>
    </el-form>

    <el-table
            :data="tableData"
            border
            style="width: 100%">
        <el-table-column
                prop="id"
                label="ID"
                width="180">
        </el-table-column>
        <el-table-column
                prop="name"
                label="姓名"
                width="180">
        </el-table-column>
        <el-table-column
                prop="letter"
                label="首字母">
        </el-table-column>
        <el-table-column
                label="图片"
                width="180">
            <template slot-scope="scope" >
                <img :src="scope.row.image" width="100px" height="50px">
            </template>
        </el-table-column>
        <el-table-column
                label="操作"
                width="180">
            <template slot-scope="scope">
                <el-button type="text" @click="edit(scope.row.id)" size="small">修改</el-button>
                <el-button type="text" @click="dele(scope.row.id)" size="small">删除</el-button>
            </template>
        </el-table-column>
    </el-table>

    <el-pagination
            @size-change="fetchData"
            @current-change="fetchData"
            :current-page.sync="currentPage"
            :page-sizes="[10, 20, 30, 40]"
            :page-size="size"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total">
    </el-pagination>

    <el-dialog
            title="品牌编辑"
            :visible.sync="formVisible">
        <el-form label-width="80px">
            <el-form-item label="品牌名称">
                <el-input placeholder="品牌名称" v-model="pojo.name"></el-input>
            </el-form-item>
            <el-form-item label="品牌首字母">
                <el-input placeholder="品牌首字母" v-model="pojo.letter"></el-input>
            </el-form-item>
            <el-form-item label="品牌图片">
                <el-input placeholder="品牌图片" v-model="pojo.image"></el-input>
            </el-form-item>
            <el-form-item label="品牌排序">
                <el-input placeholder="品牌排序" v-model="pojo.seq"></el-input>
            </el-form-item>
            <el-form-item>
            <el-button @click="save()">保存</el-button>
            <el-button @click="formVisible = false">关闭</el-button>
            </el-form-item>
        </el-form>
    </el-dialog>
</div>
</body>
<script  src="../js/axios.js"></script>
<script  src="../js/vue.js"></script>
<script  src="../js/elementui.js"></script>

<script>
    new Vue({
        el:"#app",
        data(){
            return {
                tableData:[],
                currentPage:1,
                size:10,
                total:10,
                searchMap:{},
                formVisible:false,
                pojo:{}
            }
        },
        created(){
            this.fetchData()
        },
        methods:{
            fetchData(){
                axios.post(`/brand/findPage.do?page=${this.currentPage}&size=${this.size}`,this.searchMap).then(response=>{
                    this.tableData=response.data.rows;
                    this.total=response.data.total;
                })
            },
            save(){
                axios.post(`/brand/${this.pojo.id == null?'add':'update'}.do`,this.pojo).then(response=>{
                    this.formVisible = false;
                    this.fetchData();
                })
            },
            edit(id){
                //打开窗口
                this.formVisible = true;
                axios.get(`/brand/findById.do?id=${id}`).then(response=>{
                    this.pojo = response.data;
                })
            },
            dele(id){
                //弹出提示
                this.$confirm('确定要删除吗?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    //删除
                    axios.get(`/brand/delete.do?id=${id}`).then(response=>{
                        this.$alert('删除成功', '提示');
                        this.fetchData();
                    })
                });
            }
        }

    })
</script>

</html>

效果：

点击新增

点击修改：

点击删除