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Cannot format given Object as a Number

報錯:

java.lang.IllegalArgumentException: Cannot format given Object as a Number
    at java.text.DecimalFormat.format(DecimalFormat.java:507)
    at java.text.Format.format(Format.java:157)

程式碼:

DecimalFormat decimalFormat = new DecimalFormat("#,##0.00");
przContractPreview.setBlrzll(decimalFormat.format(new BigDecimal(reqVo.getFusionRate())));//保理融資利率16 

解決方案:

.format(obj)
obj必須是BigDecimal型別