Echarts+ajax实现叠堆柱状图

示例代码

本地json

{
    "echatX": [
        "2019-07-02",
        "2019-07-03",
        "2019-07-04",
        "2019-07-05",
        "2019-07-06",
        "2019-07-07",
        "2019-07-08",
        "2019-07-09",
        "2019-07-10",
        "2019-07-11",
        "2019-07-12",
        "2019-07-13",
        "2019-07-14",
        "2019-07-15"
    ],
    "echatY": [
        120,121,123,123,125,127,128,129,120,123,122,126,129,122
    ],
    "echatY2": [
        60,64,63,63,65,67,68,69,61,66,65,68,69,65
    ],
    "echatY3": [
        60,64,63,63,65,67,68,69,161,66,65,68,169,165
    ]
}