将jsp对象转换为json

Question

我正在使用jsp，我需要将其转换为json：

在javascript中：

listas = "<%=ics.GetVar("ListasConsumo")%>";

结果console.log(listas);是下一个字符串：

LtEmConsumptionPerHourResponseDTO [
    billedConsumptionActive=ConsumptionDTO [
        consumptionHour00=99.17600000000000, 
        consumptionHour01=105.77600000000000, 
        consumptionHour02=115.45600000000000, 
        consumptionHour03=121.30800000000000
    ], 
    billedConsumptionReactive=ConsumptionDTO [
        consumptionHour00=0.00000000000000, 
        consumptionHour01=0.00000000000000, 
        consumptionHour02=0.00000000000000, 
        consumptionHour03=0.00000000000000
    ],
    registersTotal=24
]

转换为json的最佳方式是哪种？