浅谈highcharts（echarts）通过ajax获取后台数据从而改变数据图

好久没写csdn博客了，随着工作项目的展开自己也越来懒了。。不过今天有点空余的时间，所以来写写博客。

恰巧这次的项目有图表这一块，所以就用到了highcharts和echarts。

我们都知道如果写纯静态的图表图很简单，那么如果写动态的图表图该如何写呢？

好了，不多BB了，言归正传！

1、引入图表所需要的js文件

2、先把纯静态的highcharts布局好（以highcharts为例）

//	"签证变更"图表
    var chart3 = Highcharts.chart('change_attestation', {
        chart: {
            type: 'column'
        },
        title: {
            text: null
        },
        xAxis: {
            categories: ['2017-05', '2017-06', '2017-07', '2017-08', '2017-09', '2017-10']
        },
        yAxis: [{
            title: {
                text: '(元)'
            }
        }],
        tooltip: {
            headerFormat: '{point.key}',
            pointFormat: '' +
            '',
            footerFormat: '
{series.name}: 
{point.y:.1f} (元)
',
            shared: true,
            useHTML: true
        },
        plotOptions: {
            column: {
                pointPadding: 0.2,
                borderWidth: 0
            }
        },
        labels: {
            items: [{
                style: {
                    left: '300px',
                    top: '-20px',
                    color: (Highcharts.theme && Highcharts.theme.textColor) || 'black'
                }
            }]
        },
        series: [{
            name: '设计变更金额',
            data: [200, 0, 0, 0, 0, 0],
            color: 'deepskyblue'
        }, {
            name: '签证余额',
            data: [100, 0, 0, 0, 0, 0],
            color: 'orange'
        }, {
            type: 'spline',
            name: '平均值',
            data: [150, 0, 0, 0, 0, 0],
            marker: {
                lineWidth: 1,
                lineColor: Highcharts.getOptions().colors[3],
                fillColor: 'white'
            }
        }, {
            type: 'pie',
            name: '费用分析',
            data: [{
                name: '设计变更金额',
                y: 200,
                color: 'deepskyblue'
            }, {
                name: '签证余额',
                y: 100,
                color: 'orange'
            }],
            center: [10,10],
            size: 60,
            showInLegend: false,
            dataLabels: {
                enabled: false
            }
        }]
    });

这段js代码我写在KPI.js文件里了

3、通过ajax动态获取后台数据赋值给图表中的data数据

这里我是通过button按钮选择项目，然后获取到对应的项目唯一ID，从而来获取项目对应的数据

//"签证变更"图表
            $("#change_attestation").html("");
            var chart3 = Highcharts.chart('change_attestation', {
                chart: {
                    type: 'column'
                },
                title: {
                    text: null
                },
                xAxis: {

                },
                yAxis: [{
                    title: {
                        text: '(元)'
                    }
                }],
                tooltip: {
                    headerFormat: '{point.key}',
                    pointFormat: '' +
            '',
                    footerFormat: '
{series.name}: 
{point.y:.1f} (元)
',
                    shared: true,
                    useHTML: true
                },
                plotOptions: {
                    column: {
                        pointPadding: 0.2,
                        borderWidth: 0
                    }
                },
                labels: {
                    items: [{
                        style: {
                            left: '300px',
                            top: '-20px',
                            color: (Highcharts.theme && Highcharts.theme.textColor) || 'black'
                        }
                    }]
                },
                series: [{
                    name: '设计变更金额',
                    color: 'deepskyblue'
                }, {
                    name: '签证余额',
                    color: 'orange'
                }, {
                    type: 'spline',
                    name: '平均值',
                    marker: {
                        lineWidth: 1,
                        lineColor: Highcharts.getOptions().colors[3],
                        fillColor: 'white'
                    }
                }, {
                    type: 'pie',
                    name: '费用分析',
                    data: [{
                        name: '设计变更金额',
                        color: 'deepskyblue'
                    }, {
                        name: '签证余额',
                        color: 'orange'
                    }],
                    center: [10,10],
                    size: 60,
                    showInLegend: false,
                    dataLabels: {
                        enabled: false
                    }
                }]
            });
            $.ajaxSettings.async = false;//关于这个求平均数问题，必须要把这个改成同步！！！否则出现想让人屎的bug！！！
            $.getJSON("/App/AppV3/oa/DeskTop/PrjKPI.ashx?method=getCostSJList&PrjID=" + PrjId, function (data) {
                var resp = data.rows;
                var s1 = [];
                for (var i = 0; i < resp.length; i++) {
                    s1.push(resp[i].ChangeMoneySum)
                }  //到这里我是通过ajax获取到项目图表所需要的data数据
                $.session.set('cmSum', s1);  //这里是把设计变更金额数组作为sessionStorage缓存到浏览器端，便于待会的平均数求值
                chart3.xAxis[0].setCategories([resp[0].Date, resp[1].Date, resp[2].Date, resp[3].Date, resp[4].Date, resp[5].Date]);
		//setCategories是把获取到的X轴数据添加到X轴上
                chart3.series[0].update({  
                    data: [parseInt(resp[0].ChangeMoneySum), parseInt(resp[1].ChangeMoneySum), parseInt(resp[2].ChangeMoneySum), parseInt(resp[3].ChangeMoneySum), parseInt(resp[4].ChangeMoneySum), parseInt(resp[5].ChangeMoneySum)]
                });//update是把获取到的图表数据添加到data数组中去
            });
            $.getJSON("/App/AppV3/oa/DeskTop/PrjKPI.ashx?method=getCostQZList&PrjID=" + PrjId, function (data) {
                var resp = data.rows;
                var s2 = [];
                for (var i = 0; i < resp.length; i++) {
                    s2.push(resp[i].ChkMoneySum)
                }
                $.session.set('chmSum', s2);
                chart3.series[1].update({
                    data: [parseInt(resp[0].ChkMoneySum), parseInt(resp[1].ChkMoneySum), parseInt(resp[2].ChkMoneySum), parseInt(resp[3].ChkMoneySum), parseInt(resp[4].ChkMoneySum), parseInt(resp[5].ChkMoneySum)]
                });
            });
            var CMsum = $.session.get('cmSum');
            var CHMsum = $.session.get('chmSum');
            var cm = new Array();
            var chm = new Array();
            cm = CMsum.split(',');
            chm = CHMsum.split(',');
            chart3.series[2].update({
                 data: [(parseInt(cm[0]) + parseInt(chm[0])) / 2, (parseInt(cm[1]) + parseInt(chm[1])) / 2,
                        (parseInt(cm[2]) + parseInt(chm[2])) / 2, (parseInt(cm[3]) + parseInt(chm[3])) / 2,
                        (parseInt(cm[4]) + parseInt(chm[4])) / 2, (parseInt(cm[5]) + parseInt(chm[5])) / 2]
             });
             chart3.series[3].update({
                 data: [{'y':parseInt(cm[0])+parseInt(cm[1])+parseInt(cm[2])+parseInt(cm[3])+parseInt(cm[4])+parseInt(cm[5])},
                        { 'y': parseInt(chm[0]) + parseInt(chm[1]) + parseInt(chm[2]) + parseInt(chm[3]) + parseInt(chm[4]) + parseInt(chm[5])}]
             });

当我选择no：1的项目时图表为

当我选择no：2项目时图表为

结语：嗯，这就是我今天写的博客，有不严谨之处还望大神不惜赐教。