[daily record] - bug encountered during BigDecimal Division

Recently in the project test environment , Meet such a problem ; Check the log , The error information is as follows ：

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Exception in thread "main" java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result. at java.math.BigDecimal.divide(BigDecimal.java:1693)

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Find... By positioning ： Is used in code BigDecimal Of divide Method .

The inspection found that ： This is because in the BigDecimal There is no error to divide the report , So we need to go to divide The function passes in parameter settings to keep several decimal places .

「 Problem reduction 」

Here is a test code to demonstrate the scenario without division .

BigDecimal a = new BigDecimal(1);
BigDecimal b = new BigDecimal(3);
BigDecimal result = a.divide(b);
System.out.println("result = " + result);

「 terms of settlement 」

We treat it divide Method , Set the number of decimal places passed in by the parameter , And the specific rounding mode .

//  Keep two decimal places 、 rounding 
BigDecimal result = a.divide(b,2,BigDecimal.ROUND_HALF_UP);