项目开发记录：销售管理系统+数据可视化分析 开发笔记

销售管理系统+数据可视化分析 开发笔记

项目描述：

一个基于SpringBoot+Vue搭建的简单的管理系统，对于管理的数据可以根据自身的情况进行动态的调整，可以是管理图书销售、零食销售等，在本项目中以 水果销售为例。

项目原型是B站UP主的一个简单的视频教程，并由个人对其做出调整和补充

项目地址：

https://gitee.com/geng_kun_yuan/SaleSystemAndDataAnalysis

一、前端技术

1、插件使用

安装

npm install axios

npm i element-ui -S

npm install echarts --save

引入：element-ui、axios、echarts —> main.js

import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
Vue.use(ElementUI);

import axios from 'axios';
Vue.prototype.$axios = axios;

import echarts from 'echarts'
Vue.prototype.$echarts = echarts

2、编辑页面

知识点：

页面加载时发送请求获取返回的数据渲染页面

点击事件+数据的传递

表单校验，获取表单数据

3、主页面

知识点：

点击删除按钮时，弹出提示框，并对于不同的选择做出不同的操作

            fruitDelete(object) {

                let _this = this
                this.$confirm('是否确定要删除' + object.name + '？', '删除数据', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    this.$axios.delete('http://localhost:8081/fruit/delete/' + object.id).then(function (response) {
                        if (response.data) {
                            _this.$alert(object.name + '删除成功！', '删除数据', {
                                confirmButtonText: '确定',
                                callback: action => {
                                    //跳转到/table
                                    location.reload()
                                }
                            });
                        }
                    })
                }).catch(() => {

                });
            }
        },

4、柱状图

知识点：

数据的获取以及对页面数据的渲染

<template>
  <div id="myChart" :style="{width: '800px', height: '600px'}"></div>
</template>
<script>
  export default {
     
    name: 'Bar',
    mounted(){
     
      let _this = this
      this.$axios.get('http://localhost:8081/fruit/barVO').then(function (response) {
     
        // 基于准备好的dom，初始化echarts实例
        let myChart = _this.$echarts.init(document.getElementById('myChart'))
        // 绘制图表
        myChart.setOption({
     
          title: {
     
            text: 'XX统计',
            left: 'center',
            top: 20,
            textStyle: {
     
              color: '#555555'
            }
          },
          tooltip: {
     },
          xAxis: {
     
            data: response.data.names
          },
          yAxis: {
     },
          series: [{
     
            name: '统计',
            type: 'bar',
            data: response.data.values
          }]
        });
      })

    }
  }
</script>

二、后端技术

1、跨域问题

package com.lut.configuration;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class CrosConfiguration implements WebMvcConfigurer {
     

    @Override
    public void addCorsMappings(CorsRegistry registry) {
     
        registry.addMapping("/**")
                .allowedOriginPatterns("*")
                .allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }

}

2、代码生成器

package com.lut;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;

public class GenerateTest {
     
    public static void main(String[] args) {
     
        //创建generator对象
        AutoGenerator autoGenerator = new AutoGenerator();
        //数据源
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setDbType(DbType.MYSQL);
        dataSourceConfig.setDriverName("com.mysql.cj.jdbc.Driver");
        dataSourceConfig.setUsername("root");
        dataSourceConfig.setPassword("88888888");
        dataSourceConfig.setUrl("jdbc:mysql://localhost:3306/test");
        autoGenerator.setDataSource(dataSourceConfig);
        //全局配置
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir(System.getProperty("user.dir")+"/src/main/java");
        globalConfig.setAuthor("admin");
        globalConfig.setOpen(false);
        globalConfig.setServiceName("%sService");
        autoGenerator.setGlobalConfig(globalConfig);
        //包信息
        PackageConfig packageConfig = new PackageConfig();
        packageConfig.setParent("com.lut.fruit_java");
        packageConfig.setEntity("entity");
        packageConfig.setMapper("mapper");
        packageConfig.setService("service");
        packageConfig.setServiceImpl("service.impl");
        packageConfig.setController("controller");
        autoGenerator.setPackageInfo(packageConfig);
        //策略配置
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig.setInclude("fruit");
        strategyConfig.setNaming(NamingStrategy.underline_to_camel);
        strategyConfig.setColumnNaming(NamingStrategy.underline_to_camel);
        strategyConfig.setEntityLombokModel(true);
        autoGenerator.setStrategy(strategyConfig);
        //运行
        autoGenerator.execute();
    }
}

3、配置文件

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8
    username: root
    password: 88888888
    driver-class-name: com.mysql.cj.jdbc.Driver
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath:com/southwind/mapper/xml/*.xml
server:
  port: 8081

4、数据的封装

对于图表数据（柱状图 和 饼状图）要加载的数据类型进行封装

@Data
public class BarVO {
     
    private List<String> names;
    private List<DataVO> values;
}

@Data
public class DataVO {
     
    private Integer value;
    private Map<String,String> itemStyle;
}

@Data
public class PieVO {
     
    private Integer value;
    private Map<String,String> itemStyle;
    private String name;
}

    @GetMapping("/barVO")
    public BarVO barVO() {
     
        return this.fruitService.barVOList();
    }

    @GetMapping("/pieVO")
    public List<PieVO> pieVO() {
     
        return this.fruitService.pieVOList();
    }

/**
 * 

 *  服务实现类
 * 
 */
@Service
public class FruitServiceImpl extends ServiceImpl<FruitMapper, Fruit> implements FruitService {
     

    @Autowired
    private FruitMapper fruitMapper;

    @Override
    public BarVO barVOList() {
     
        BarVO barVO = new BarVO();
        List<String> names = new ArrayList<>();
        List<DataVO> values = new ArrayList<>();
        //先查出数据
        List<Fruit> fruits = this.fruitMapper.selectList(null);
        for (Fruit fruit : fruits) {
     
            names.add(fruit.getName());
            DataVO dataVO = new DataVO();
            dataVO.setValue(fruit.getSale());
            dataVO.setItemStyle(DataUtil.createItemStyle(fruit.getSale()));
            values.add(dataVO);
        }
        barVO.setNames(names);
        barVO.setValues(values);
        //转换VO
        return barVO;
    }

    @Override
    public List<PieVO> pieVOList() {
     
        List<PieVO> pieVOList = new ArrayList<>();
        List<Fruit> fruits = this.fruitMapper.selectList(null);
        for (Fruit fruit : fruits) {
     
            PieVO pieVO = new PieVO();
            pieVO.setValue(fruit.getSale());
            pieVO.setName(fruit.getName());
            pieVO.setItemStyle(DataUtil.createItemStyle(fruit.getSale()));
            pieVOList.add(pieVO);
        }
        return pieVOList;
    }
}

三、BUG处理

BUG1：axios is not defined

[Vue warn]: Error in created hook: “ReferenceError: axios is not defined”

---

正确安装

正确安装 axios

axios已经是安装好的状态

在main.js下

import VueAxios from 'vue-axios';
import axios from 'axios';

使用的npm 例子的代码如下：

created(){
    const  _this = this
    axios.get('http://localhost:8081/book/findall').then(function (resp) {
        _this.books = resp.data;
      })
  }
}

请求时浏览器出现以下错误

webpack-internal:///./node_modules/vue/dist/vue.esm.js:629 [Vue warn]: Error in created hook: "ReferenceError: axios is not defined"
found in
--->  at src/components/Book.vue
    at src/App.vue
     
     warn @ webpack-internal:///./node_modules/vue/dist/vue.esm.js:629

解决办法

在main.js下 改成

import VueAxios from 'vue-axios';
import axios from 'axios';
Vue.prototype.$axios = axios;

例子的代码改成

created(){
    const  _this = this
    this.$axios.get('http://localhost:8081/book/findall').then(function (resp) {
        _this.books = resp.data;
      })
  }
}

改好之后 运行 问题得到解决

BUG2：中文变成??

在于数据库交互时，写入数据库的中文会变成 ???

查看配置数据库配置文件

spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8

解决方法：在后面加上useUnicode=true&characterEncoding=UTF-8即可

spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8