MainMapper.java：

package net.educoder.app.mapper;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import java.util.List;
@Mapper
public interface MainMapper {
    
    //参考
    @Select("SELECT _num from taxi_trend WHERE _taxi = #{type} ORDER BY _time")
    List findTaxiTrendNumByType(String type);
    /**********begin**********/
    @Select("SELECT _time FROM taxi_trend GROUP BY _time ")
    List findTaxiTrendTime();
    @Select("select _taxi from taxi_trend group by _taxi")
    List findTaxiType();
    @Select("SELECT _type from taxi_servicenum GROUP BY _type")
    List findTaxiPlatform();
    @Select("SELECT _serviceType FROM taxi_servicenum GROUP BY _serviceType ORDER BY _serviceType")
    List findAllTaxiService();
    @Select("SELECT _num FROM taxi_servicenum WHERE _type = #{Platform} order BY _serviceType ")
    List findServiceNumByPlatform(String Platform);    
    /**********end**********/
}
 

MainController.java：

package net.educoder.app.controller;
import net.educoder.app.entity.Chart_Line;
import net.educoder.app.entity.Chart_Radar;
import net.educoder.app.mapper.MainMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@Controller
public class MainController {
    /**********begin**********/
    @Autowired
    MainMapper mainMapper;
    @RequestMapping("/index")
    public String index() {
        return "index";
    }
    @RequestMapping("/Line_Chart")
    @ResponseBody
    public Map Line_Chart() {
        List taxiType = mainMapper.findTaxiType();
        Map map = new HashMap<>();
        List resultList = new ArrayList<>();
        for (String s : taxiType) {
            List list = mainMapper.findTaxiTrendNumByType(s);
            Chart_Line chart_line = new Chart_Line(s, "line", list);
            resultList.add(chart_line);
        }
        List taxiTrendTimeList = mainMapper.findTaxiTrendTime();
        map.put("timeList", taxiTrendTimeList);
        map.put("resultData", resultList);
        return map;
    }
    @RequestMapping("/Radar_Chart")
    @ResponseBody
    public Map Radar_Chart() {
        Map map = new HashMap<>();
        List allTaxiService = mainMapper.findAllTaxiService();
        List> indicatorList = new ArrayList<>();
        for (String s : allTaxiService) {
            HashMap stringIntegerHashMap = new HashMap<>();
            stringIntegerHashMap.put("name", s);
            stringIntegerHashMap.put("max", 100);
            indicatorList.add(stringIntegerHashMap);
        }
        List taxiPlatform = mainMapper.findTaxiPlatform();
        List resultList = new ArrayList<>();
        for (String s : taxiPlatform) {
            List serviceNumByPlatform = mainMapper.findServiceNumByPlatform(s);
            Chart_Radar chart_radar = new Chart_Radar(s, serviceNumByPlatform);
            resultList.add(chart_radar);
        }
        map.put("resultData", resultList);
        map.put("legendData", taxiPlatform);
        map.put("indicator", indicatorList);
        return map;
    }
    /**********end**********/
}
 

index.html：