前后端分离（VUE+SPRINGBOOT+SpringDataJapa+Echarts）报表开发

一、后端实现

1、创建springboot项目，添加 web、jpa、lombok、mysql、jdbc 启动器，加载pom.xml。

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xkxx</groupId>
    <artifactId>chart</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>chart</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、在resources下，将application.properties文件后缀改成.yml

server:
  port: 8888
spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/china?useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: sasa
    driver-class-name: com.mysql.cj.jdbc.Driver
  jpa:
    show-sql: true
    database: mysql
    hibernate:
      ddl-auto: update
      naming:
        implicit-strategy: org.hibernate.boot.model.naming.ImplicitNamingStrategyComponentPathImpl
        physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
  main:
    allow-bean-definition-overriding: true

3、编写统计对象Phone（由于数据库表过于简单，在此忽略）idea使用了lombok插件

package com.xkxx.chart.entity;

import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.Data;

import javax.persistence.*;


@Data
@Entity
@Table(name = "phone")
public class Phone  {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id",unique = true,nullable = false,length = 50)
    @JsonIgnore //不返回id
    private Integer id;
    @Column(name = "name",nullable = false,length = 50)
    private String name;
    @Column(name = "num",nullable = false,length = 50)
    private String num;
}

4、编写dao（使用SpringDataJpa)

package com.xkxx.chart.dao;

import com.xkxx.chart.entity.Phone;
import org.springframework.data.jpa.repository.JpaRepository;

public interface PhoneDao extends JpaRepository<Phone,Integer> {

}

5、5、编写service，调用dao接口方法，返回信息

package com.xkxx.chart.service;

import com.xkxx.chart.dao.PhoneDao;
import com.xkxx.chart.entity.Phone;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;
import java.util.List;

@Service
@Transactional
public class PhoneService {
    @Autowired
    private PhoneDao phoneDao;
    public List<Phone> findAll(){
        return phoneDao.findAll();
    }
}

6、编写web，调用service方法,实现数据与前端交互

package com.xkxx.chart.web;

import com.xkxx.chart.entity.Phone;
import com.xkxx.chart.service.PhoneService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class IndexController {
    @Autowired
    private PhoneService phoneService;
    @GetMapping("/phone")
    public List<Phone> findAll(){
        return phoneService.findAll();
    }
}

7、编写CorsConfig类进行前后端分离跨域请求

package com.xkxx.chart.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

@Configuration
public class CorsConfig {
    // 初始化 CorsConfiguration 对象并设置允许的域名、请求头部信息和请求方式
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); // 1 允许任何域名使用
        corsConfiguration.addAllowedHeader("*"); // 2 允许任何头
        corsConfiguration.addAllowedMethod("*"); // 3 允许任何方法（post、get 等）
        return corsConfiguration;
    }
    /**
     * 创建 CorsFilter 对象
     * @return CorsFilter
     */
    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new
                UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); //拦截所有请求
        return new CorsFilter(source);
    }
}

8、后端最终样式

二，前端VUE+Echarts

1、创建vue项目（如何创建vue项目？）

2、安装 axios 插件，在当前项目下的终端输入命令: npm install --save axios vue-axios
导入v-charts,输入命令：npm install echarts v-charts --save-dev（什么是v-charts？）

3、在 src 文件夹下的程序入口 main.js 中导入

import axios from 'axios'
import VueAxios from 'vue-axios'
// element-ui 引入文件
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
//注册 VueAxios, axios
Vue.use(VueAxios, axios)
Vue.use(ElementUI)

4、在src的main.js下导入插件

import axios from 'axios'
import VueAxios from 'vue-axios'
import VCharts from 'v-charts'
Vue.use(VCharts)
//注册 VueAxios, axios
Vue.use(VueAxios, axios)

5、创建vue文件，编写柱状图

<template>
  <ve-histogram :data="chartData" :title="chartTitle" :settings="chartSettings" :extend="extend"></ve-histogram>
</template>
<script>
const axios = require("axios");
import "echarts/lib/component/title";
export default {
  data () {
    this.chartSettings = {
      yAxisType: ['KMB'],
      yAxisName: ['销量/万'],
    },
      this.extend = {
        barWidth: 25,//设置宽度为15px
        // x轴的文字倾斜
        'xAxis.0.axisLabel.rotate': 45,
        'xAxis.0.axisLabel.fontSize': 20,//x轴文本字体大小
        'xAxis.0.axisLabel.fontWeight': 'bold',//x轴文本字体粗细
        series: {
          label: { show: true, position: "top" },
          color: function (value) { return "#" + ("00000" + ((Math.random() * 16777215 + 0.5) >> 0).toString(16)).slice(-6); }
        }
      },
      this.chartTitle = {
        // 文字啥的，用\n可以换行
        text: '2019各大手机品牌销量',
        x: '25px',
        textStyle: {
          fontSize: 20,
          fontWeight: 'normal',
        }
      }
    return {
      chartData: {
        columns: ['name', 'num'],
        rows: []
      }
    }
  },
  created: function () {
    var app = this;
    console.log("init");
    this.init()
  },
  methods: {
    init: function () {
      var app = this;
      axios
        .get("http://localhost:8888/phone")
        .then(function (response) {
          app.chartData.rows = response.data;
        })
        .catch(function (error) {
          console.log(error);
        });
    },
  }
}

</script>

展示效果

6、创建vue文件，编写饼状图

<template>
  <ve-pie :data="chartData" :title="chartTitle" :events="chartEvents" :settings="chartSettings"></ve-pie>
</template>
<script>
const axios = require("axios");
import "echarts/lib/component/title";
export default {
  data () {
    var self = this
    this.chartEvents = {
      click: function (e) {
        self.name = e.name
        alert(e.name + ":" + e.percent);
        console.log(e)
      }
    },
      this.chartSettings = {
        radius: 150,
        offsetY: 250,
        label: {
          normal: {
            fontSize: 16,
            formatter: '{b}' + '\n\r' + '{c}' + '\n\r' + '({d}%)'
          }
        }

      },
      this.chartTitle = {
        // 文字啥的，用\n可以换行
        text: '2019各大手机品牌销量',
        x: '25px',
        textStyle: {
          fontSize: 20,
          fontWeight: 'normal',
        }
      }
    return {
      chartData: {
        columns: ['name', 'num'],
        rows: []
      }
    }
  },
  created: function () {
    var app = this;
    console.log("init");
    this.init()
  },
  methods: {
    init: function () {
      var app = this;
      axios
        .get("http://localhost:8888/phone")
        .then(function (response) {
          app.chartData.rows = response.data;
        })
        .catch(function (error) {
          console.log(error);
        });
    },
  }
}
</script>

展示效果

总结：难点就是在前端样式的更改，后端是最基础的查询所有数据。