perf[net]: 优化StopWatch的打印格式，保留两位小数

net/src/main/java/com/zfoo/net/NetContext.java

@@ -104,7 +104,7 @@ public class NetContext implements ApplicationListener<ApplicationContextEvent>,
             instance.packetService.init();
             instance.configManager.initRegistry();
 
-            logger.info("net start success and cost [{}] second", stopWatch.costSecond());
+            logger.info("Net started successfully and cost [{}] seconds", stopWatch.costSeconds());
         } else if (event instanceof ContextClosedEvent) {
             shutdownBefore();
             shutdownAfter();

orm/src/main/java/com/zfoo/orm/OrmContext.java

@@ -89,7 +89,7 @@ public class OrmContext implements ApplicationListener<ApplicationContextEvent>,
             instance.ormManager.inject();
             instance.ormManager.initAfter();
 
-            logger.info("orm start success and cost [{}] second", stopWatch.costSecond());
+            logger.info("Orm started successfully and cost [{}] seconds", stopWatch.costSeconds());
         } else if (event instanceof ContextClosedEvent) {
             shutdownBefore();
             shutdownBetween();

scheduler/src/main/java/com/zfoo/scheduler/model/StopWatch.java

@@ -14,6 +14,9 @@ package com.zfoo.scheduler.model;
 
 import com.zfoo.scheduler.util.TimeUtils;
 
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
 /**
  * @author jaysunxiao
  * @version 3.0
@@ -26,12 +29,21 @@ public class StopWatch {
         return TimeUtils.currentTimeMillis() - startTime;
     }
 
-    public float costSecond() {
-        return (TimeUtils.currentTimeMillis() - startTime) / (float) TimeUtils.MILLIS_PER_SECOND;
+    /**
+     * 从StopWatch被创建，到调用这个方法消耗的时间
+     *
+     * @return 返回消耗的时间，保留两位小数，格式xx.xx
+     */
+    public String costSeconds() {
+        var cost = cost() / (float) TimeUtils.MILLIS_PER_SECOND;
+        var decimal = new BigDecimal(cost);
+        return decimal.setScale(2, RoundingMode.HALF_UP).toString();
     }
 
-    public float costMinute() {
-        return (TimeUtils.currentTimeMillis() - startTime) / (float) TimeUtils.MILLIS_PER_MINUTE;
+    public String costMinutes() {
+        var cost = cost() / (float) TimeUtils.MILLIS_PER_MINUTE;
+        var decimal = new BigDecimal(cost);
+        return decimal.setScale(2, RoundingMode.HALF_UP).toString();
     }
 
     public long getStartTime() {

storage/src/main/java/com/zfoo/storage/StorageContext.java

@@ -90,7 +90,7 @@ public class StorageContext implements ApplicationListener<ApplicationContextEve
 
             // 移除没有被引用的不必要资源，为了节省服务器内存
             instance.storageManager.initAfter();
-            logger.info("storage start success and cost [{}] second", stopWatch.costSecond());
+            logger.info("Storage started successfully and cost [{}] seconds", stopWatch.costSeconds());
         } else if (event instanceof ContextClosedEvent) {
 
         }