Java8 stream 常用方法

• stream().map 指定计算函数

private List cloneNewList(List sourceList, RateType rateType){
	return sourceList.stream().map(new Function() {
		@Override
		public RuleBO apply(FxRateRuleBO source) {
			RuleBO target = new RuleBO();
			target.setBuy(BigDecimal.ZERO);
			target.setSell(BigDecimal.ZERO);
			target.setRateType(rateType);
			return target;
		}
	}).collect(Collectors.toList());
}