Java格式BigDecimal数字,带逗号和2位小数

Question

我想用逗号和2个小数点格式化BigDecimal数字.例如

Amount is: 5.0001 and formatted to: 5.00
Amount is: 999999999.999999 and formatted to: 999,999,999.99
Amount is: 1000.4999 and formatted to: 1,000.49
Amount is: 9999.089 and formatted to: 9,999.08
Amount is: 0.19999 and formatted to: 0.19
Amount is: 123456.99999999 and formatted to: 123,456.99

Answer 1

这应该足以得到结果.

String.format("%,.2f", amount.setScale(2, RoundingMode.DOWN));