BigDecimalweightGroupTotalScoremultiplystringBigDecimalMapgetscoreItemValueKey dividelevelTotalWeightdividenew BigDecimalscoreItemValueVOS1size; 保留四位小数

BigDecimal(weightGroupTotalScore).multiply(stringBigDecimalMap.get(scoreItemValueKey)) .divide(levelTotalWeight).divide(new BigDecimal(scoreItemValueVOS1.size()), 4, RoundingMode.HALF_UP);