32 lines
1.0 KiB
Java
32 lines
1.0 KiB
Java
package com.njcn;
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import com.njcn.csdevice.CsDeviceBootApplication;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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import org.springframework.test.context.web.WebAppConfiguration;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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@RunWith(SpringRunner.class)
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@WebAppConfiguration
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@SpringBootTest(classes = CsDeviceBootApplication.class)
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public class BaseJunitTest {
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public static void main(String[] args) {
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double num1 = 123.456;
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double num2 = 123.4;
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double num3 = 123.0;
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System.out.println(roundToTwoDecimalPlaces(num1)); // 输出: 123.46
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System.out.println(roundToTwoDecimalPlaces(num2)); // 输出: 123.40
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System.out.println(roundToTwoDecimalPlaces(num3)); // 输出: 123.00
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}
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public static double roundToTwoDecimalPlaces(double num) {
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// 乘以100，然后四舍五入，再除以100
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return Math.round(num * 100.0) / 100.0;
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}
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}
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