option = {

     tooltip: {

         trigger: 'item',

        formatter:'{c}%'　　　　//这是关键，在需要的地方加上就行了

     },

     grid: {

         borderWidth: 0,

         y: 80,

         y2: 60

     },

     xAxis: [

         {

             type: 'category',

             show: false,

             data: ['Line', 'Bar', 'Scatter', 'K', 'Pie', 'Radar', 'Chord', 'Force', 'Map', 'Gauge', 'Funnel']

         }

     ],

     yAxis: [

         {

             type: 'value',

             show: false

         }

     ],

     series: [

         {

             name: 'ECharts例子个数统计',

             type: 'bar',

             itemStyle: {

                 normal: {

                     color: function(params) {

                         // build a color map as your need.

                         var colorList = [

                           '#C1232B','#B5C334','#FCCE10','#E87C25','#27727B',

                            '#FE8463','#9BCA63','#FAD860','#F3A43B','#60C0DD',

                            '#D7504B','#C6E579','#F4E001','#F0805A','#26C0C0'

                         ];

                         return colorList[params.dataIndex]

                     },

                     label: {

                         show: true,

                         position: 'top',

                         formatter: '{b}\n{c}%'　　　　//这是关键，在需要的地方加上就行了

                     }

                 }

             },

             data: [12,21,10,4,12,5,6,5,25,23,7],

         }

     ]

 };