echarts图表

vue安装echarts

npm i echarts -S

Echarts官网：https://echarts.apache.org/zh/index.html

Echarts使用手册：https://echarts.apache.org/handbook/zh/get-started/

引入echarts：import * as echarts from 'echarts'

折线图

柱状图

<div id="main" style="width: 500px; height: 400px"></div>

var option = {
      title: {
        text: '各季度会员数量统计',
        subtext: '趋势图',
        left: 'center'
      },
      xAxis: {
        type: 'category',
        data: ["第一季度", "第二季度", "第三季度", "第四季度"]
      },
      yAxis: {
        type: 'value'
      },
      series: [
        {
          data: [],
          type: 'line'
        },
        {
          data: [],
          type: 'bar'
        }
      ]
    };
    
    var chartDom = document.getElementById('main');
    var myChart = echarts.init(chartDom);
    
    this.request.get("/echarts/members").then(res => {
      // 填空
      // option.xAxis.data = res.data.x
      option.series[0].data = res.data
      option.series[1].data = res.data
      // 数据准备完毕之后再set
      myChart.setOption(option);

    })

饼图

  <div id="pie" style="width: 500px; height: 400px"></div>
  
// 饼图

var pieOption = {
  title: {
    text: '各季度会员数量统计',
    subtext: '比例图',
    left: 'center'
  },
  tooltip: {
    trigger: 'item'
  },
  legend: {
    orient: 'vertical',
    left: 'left'
  },
  series: [
    {
      type: 'pie',
      radius: '60%',
      label:{            //饼图图形上的文本标签
        normal:{
          show:true,
          position:'inner', //标签的位置
          textStyle : {
            fontWeight : 300 ,
            fontSize : 14,    //文字的字体大小
            color: "#fff"
          },
          formatter:'{d}%'
        }
      },
      data: [],  // 填空
      emphasis: {
        itemStyle: {
          shadowBlur: 10,
          shadowOffsetX: 0,
          shadowColor: 'rgba(0, 0, 0, 0.5)'
        }
      }
    }
  ]
};

var pieDom = document.getElementById('pie');
var pieChart = echarts.init(pieDom);

this.request.get("/echarts/members").then(res => {

    pieOption.series[0].data = [
        {name: "第一季度", value: res.data[0]},
        {name: "第二季度", value: res.data[1]},
        {name: "第三季度", value: res.data[2]},
        {name: "第四季度", value: res.data[3]},
    ]
    pieChart.setOption(pieOption)
})

EchartsController.java

package com.qingge.springboot.controller;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.date.Quarter;
import com.qingge.springboot.common.Result;
import com.qingge.springboot.entity.User;
import com.qingge.springboot.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
@RequestMapping("/echarts")
public class EchartsController {
    @Autowired
    private IUserService userService;
    @GetMapping("/example")
    public Result get() {
        Map<String, Object> map = new HashMap<>();
        map.put("x", CollUtil.newArrayList("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"));
        map.put("y", CollUtil.newArrayList(150, 230, 224, 218, 135, 147, 260));
        return Result.success(map);
    }

    @GetMapping("/members")
    public Result members() {
        List<User> list = userService.list();
        int q1 = 0; // 第一季度
        int q2 = 0; // 第二季度
        int q3 = 0; // 第三季度
        int q4 = 0; // 第四季度
        for (User user : list) {
            Date createTime = user.getCreateTime();
            Quarter quarter = DateUtil.quarterEnum(createTime);
            switch (quarter) {
                case Q1: q1 += 1; break;
                case Q2: q2 += 1; break;
                case Q3: q3 += 1; break;
                case Q4: q4 += 1; break;
                default: break;
            }
        }
        return Result.success(CollUtil.newArrayList(q1, q2, q3, q4));
    }
}