治理设备新增模块状态查询功能

cs-device/cs-device-boot/src/test/java/com/njcn/BaseJunitTest.java

@@ -0,0 +1,31 @@
+package com.njcn;
+
+import com.njcn.csdevice.CsDeviceBootApplication;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+@RunWith(SpringRunner.class)
+@WebAppConfiguration
+@SpringBootTest(classes = CsDeviceBootApplication.class)
+public class BaseJunitTest {
+
+    public static void main(String[] args) {
+        double num1 = 123.456;
+        double num2 = 123.4;
+        double num3 = 123.0;
+
+        System.out.println(roundToTwoDecimalPlaces(num1)); // 输出: 123.46
+        System.out.println(roundToTwoDecimalPlaces(num2)); // 输出: 123.40
+        System.out.println(roundToTwoDecimalPlaces(num3)); // 输出: 123.00
+    }
+
+    public static double roundToTwoDecimalPlaces(double num) {
+        // 乘以100，然后四舍五入，再除以100
+        return Math.round(num * 100.0) / 100.0;
+    }
+}