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把主键作为key
Map<Long, EmallFeeDto> feeItemMap = Maps.newHashMap();
if (feeDtoList != null) {
feeItemMap = Maps. uniqueIndex( feeDtoList, new Function<EmallFeeDto, Long>() {
@Override
public Long apply(EmallFeeDto input) {
return input.getFeeId();
}
});
}