series的connectNulls属性支持连接空值 connectNulls:true
option = { xAxis: { type: 'category', data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] }, yAxis: { type: 'value' }, series: [ { connectNulls:true, //断点连接 data: [150, 220, 224, '', 135, 147, 260], type: 'line' } ] };