解决HighChart画饼状图时小数位精度BUG的方法

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 * Return the configuration hash needed for the data label and tooltip formatters
 getLabelConfig: function () {
 var point = this;
 return {
 x: point.category,
 y: point.y,
 key: point.name || point.category,
 series: point.series,
 point: point,
 percentage: Math.round(point.percentage,2), //point.percentage
 total: point.total || point.stackTotal
 };
 },

* Return the configuration hash needed for the data label and tooltip formatters getLabelConfig: function () { var point = this; return { x: point.category, y: point.y, key: point.name || point.category, series: point.series, point: point, percentage: Math.round(point.percentage,2), //point.percentage total: point.total || point.stackTotal }; },

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tooltip:{
      formatter: function () {  
      return '' + this.point.name + ': ' +Highcharts.numberFormat(this.percentage, 2) + ' %';  
        } 
},

tooltip:{ formatter: function () { return '' + this.point.name + ': ' +Highcharts.numberFormat(this.percentage, 2) + ' %'; } },