spring boot动态加载Echart饼状图

public class EchartData {
 private String name;
 private Float value;

 public EchartData(){}
 public EchartData(String name, Float value){
  this.value = value;
  this.name = name;
 }
 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public Float getValue() {
  return value;
 }

 public void setValue(Float value) {
  this.value = value;
 }
}

@RequestMapping("/dwcb")
 @ResponseBody
 private String dwcb(@RequestParam("scrq1") String scrq1,@RequestParam("scrq2") String scrq2,
      @RequestParam("dwmc") String dwmc,Map map) throws ParseException {
  List lis = new ArrayList();
  List<ViewNyRxhmx> list = rcbService.findSearchRcb(scrq1,scrq2,dwmc);
  //查询出所有的单位信息
  Float total = Float.valueOf(0);
  Float F01 = Float.valueOf(0);
  Float F02 = Float.valueOf(0);
  Float F03 = Float.valueOf(0);
  Float F04 = Float.valueOf(0);
  Float F05 = Float.valueOf(0);
  Float F06 = Float.valueOf(0);
  Float F07 = Float.valueOf(0);
  for(ViewNyRxhmx item : list){
   
   if(item.getDwdm().equals("F01") && item.getRcb()!=null){
    F01 += Float.valueOf(item.getRcb());
   }
   if(item.getDwdm().equals("F02") && item.getRcb()!=null){
    F02 += Float.valueOf(item.getRcb());
   }
   if(item.getDwdm().equals("F03") && item.getRcb()!=null){
    F03 += Float.valueOf(item.getRcb());
   }
   if(item.getDwdm().equals("F04") && item.getRcb()!=null){
    F04 += Float.valueOf(item.getRcb());
   }
   if(item.getDwdm().equals("F05") && item.getRcb()!=null){
    F05 += Float.valueOf(item.getRcb());
   }
   if(item.getDwdm().equals("F06") && item.getRcb()!=null){
    F06 += Float.valueOf(item.getRcb());
   }
   if(item.getDwdm().equals("F07") && item.getRcb()!=null){
    F07 += Float.valueOf(item.getRcb());
   }
  }

  EchartData echartData1 = new EchartData("第一备煤分厂",F01);
  EchartData echartData2 = new EchartData("第二备煤分厂",F02);
  EchartData echartData3 = new EchartData("第一炼焦分厂",F03);
  EchartData echartData4 = new EchartData("第二炼焦分厂",F04);
  EchartData echartData5 = new EchartData("第三炼焦分厂",F05);
  EchartData echartData6 = new EchartData("能源分厂",F06);
  EchartData echartData7 = new EchartData("综合保障分厂",F07);

  lis.add(echartData1);
  lis.add(echartData2);
  lis.add(echartData3);
  lis.add(echartData4);
  lis.add(echartData5);
  lis.add(echartData6);
  lis.add(echartData7);
  String data = JSON.toJSONString(lis);
  System.out.println("data:"+data);

  return data;
 }

 $(function () {
 // 基于准备好的dom，初始化echarts图表
 var pie_data = echarts.init(document.getElementById('pie_data'));
 //显示加载动画
 pie_data.showLoading();
 var scrq1 = document.getElementById('scrq1').value;
 var scrq2 = document.getElementById('scrq2').value;
 var dwmc = document.getElementById('dwmc').value;
 $.ajax({
  type:"POST",
  cache:false,
  url:"/dwcb",
  data:{"scrq1": scrq1,"scrq2": scrq2,"dwmc": dwmc},
  dataType: "json",
  success:function (result) {
   $('#mytable').html("<thead><tr><th align='center'>单位名称</th><th align='center'>总成本</th></tr></thead>");

   <!--向表中填写数据-->
   var item;
   $.each(result,function(i,res){
    item = "<tr><td align='center'>"+res['name']+"</td><td align='center'>"+res['value']+"</td></tr>";

    $('#mytable').append(item);
   });
   // $("#mytable").table("refresh");
   //隐藏加载动画
   pie_data.hideLoading();
   pie_data.setOption({
    tooltip : {
     formatter: "{b} : {c} ({d}%)"
    },
    series: [{
     // 根据名字对应到相应的系列
     name: '访问来源',
     type: 'pie',
     radius: '55%',
     data: result
    }]
   })
  }
 })
});