使用JSON.stringify

var j={
        stationFilter: '',
        groupId: -1,
        lampEnable: -1,
        cableEnable: -1,
        leakEnable: -1,
        runState: -1
      };
JSON.stringify(j)

结果

'{"stationFilter":"","groupId":"-1","lampEnable":"0","cableEnable":"0","leakEnable":"0","runState":"1"}'