自定义JS组件+调用restfui接口显示（SpringBoot）

 先上效果图，可多个显示 ，

应用场景：可用于设备稼动率显示（如开机、停机、故障占比多少），中间可写一些文字表达（比如交期紧急情况等等）。

 

 

 

1、创建自定义饼图（JS组件)

 1 function BingChart(){
 2 
 3     this.data ={
 4         id:"canvas",
 5         width:600,
 6         height:600,
 7         centerValue:{
 8             value:6,
 9             size:50,
10             color:"red"
11         },
12         chartData:[{
13             "value": .2,
14             "color": "red",
15             "title": ""
16         },{
17             "value": .3,
18             "color": "blue",
19             "title": ""
20         },{
21             "value": .4,
22             "color": "green",
23             "title": ""
24         },{
25             "value": .1,
26             "color": "#ccc",
27             "title": ""
28         }]
29     } ;
30 }
31 
32 BingChart.prototype.init=function(data){
33     if(this.data.id==null){
34         console.log("id不允许为空")
35     }else{
36         this.data.id=data.id;
37         this.data.width=data.width||this.data.width;
38         this.data.height=data.height||this.data.height;
39         this.data.centerValue=data.centerValue||this.data.centerValue;
40         this.data.chartData=data.chartData||this.data.chartData;
41     }
42     this.rend();
43 }
44 
45 BingChart.prototype.rend=function(){
46     var _data=this.data;
47     var canvas = document.getElementById(_data.id);
48     canvas.width = _data.width;
49     canvas.height = _data.height;
50     var ctx = canvas.getContext("2d");
51 
52 
53     var radius = Math.min(_data.width,_data.height)*0.45;
54     var tempAngle = -90;
55 
56     for(var i=0;i<_data.chartData.length;i++){
57         // 开始绘制新状态的扇形
58         ctx.beginPath();
59         ctx.moveTo(_data.width/2, _data.height/2);
60         ctx.fillStyle = _data.chartData[i].color;
61 //          ctx.strokeStyle= data[i].color;
62         var angle = _data.chartData[i].value*360;
63         var startAngle = tempAngle*Math.PI/180;
64         var endAngle = (tempAngle + angle)*Math.PI/180;
65         ctx.arc(_data.width/2, _data.height/2, radius, startAngle, endAngle);
66         ctx.fill();
67         //ctx.stroke();
68         tempAngle+=angle;
69     }
70     ctx.beginPath();
71     ctx.moveTo(_data.width/2, _data.height/2);
72     ctx.fillStyle = "#FFF";
73     ctx.arc(_data.width/2, _data.height/2, radius*0.5, 0, Math.PI*2);
74     ctx.fill();
75 
76     ctx.fillStyle = _data.centerValue.color;
77     ctx.font=_data.centerValue.size+"px Georgia";
78 
79     ctx.fillText(_data.centerValue.value,_data.width/2-_data.centerValue.size/4,_data.height/2+_data.centerValue.size*0.37);
80 }

2、创建前台HTML页面，Chrome浏览器调试注意清理缓存（ctrl+shift+delete键），避免没有加载更新。

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Chart</title>
 6     <script type="application/javascript" src="https://cdn.bootcss.com/jquery/3.3.0/jquery.js"></script>
 7    <script src="js/BingChart.js" type="application/javascript"></script>
 8 
 9 </head>
10 <body>
11 
12 </body>
13 
14 <script>
15 
16     var obj ={
17         id:"canvas",
18         width:150,
19         height:150,
20         centerValue:{
21             value:6,
22             size:30,
23             color:"red"
24         },
25         chartData:null
26     } ;
27 
28      (function(){
29         $.ajax({ url:"bingChart",
30             success:function(data){
31                 $("body").empty();
32                 for(var i=0;i<data.obj.length;i++){
33                     obj.chartData=data.obj[i];
34                     var canvas=document.createElement("canvas");
35                     var id="canvas"+i;
36                     canvas.setAttribute("id",id);
37                     document.body.appendChild(canvas);
38                     obj.id=id;
39                     new BingChart().init(obj);
40                 }
41             }
42         })
43     })();
44 
45 </script>
46 </html>

3、SpringBoot，restful接口的写法()，BingChart实体就不复制

package com.yunsu.sales.controller;

import com.yunsu.framework.vo.ResponseVo;
import com.yunsu.sales.entity.BingChart;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.UUID;


@RestController
public class BingChartController {

@GetMapping("/bingChart")
public ResponseVo getBingChart(){
ResponseVo responseVo=new ResponseVo();
List<List<BingChart>> data=new ArrayList<>();

Random rand=new Random();
for(int i=0;i<50;i++){
List<BingChart> list=new ArrayList<>();
for(int j=0;j<4;j++){
BingChart bingChart=new BingChart();
bingChart.setValue(0.25);
bingChart.setColor("#"+String.valueOf(rand.nextInt(9))+String.valueOf(rand.nextInt(9))+String.valueOf(rand.nextInt(9)));
bingChart.setTitle(UUID.randomUUID().toString().substring(0,8));
list.add(bingChart);
}
data.add(list);
}
return new ResponseVo().setObj(data);

}

}

文件结构

 

 

posted on 2018-07-15 23:32  dollymi  阅读(1720)  评论(0)  编辑  收藏  举报

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