From 10d4b885a9b2af2a38bb03249d7547283f948197 Mon Sep 17 00:00:00 2001
From: kaiyu <404897439@qq.com>
Date: Mon, 13 Sep 2021 13:15:18 +0800
Subject: [PATCH] screen-api                  增加获取无人机数据接口

---
 screen-common/src/main/java/com/moral/util/UnitConvertUtils.java |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/screen-common/src/main/java/com/moral/util/UnitConvertUtils.java b/screen-common/src/main/java/com/moral/util/UnitConvertUtils.java
index e86291d..7d918da 100644
--- a/screen-common/src/main/java/com/moral/util/UnitConvertUtils.java
+++ b/screen-common/src/main/java/com/moral/util/UnitConvertUtils.java
@@ -1,5 +1,7 @@
 package com.moral.util;
 
+import org.springframework.util.ObjectUtils;
+
 import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
@@ -28,6 +30,8 @@
             * @Date: 2021/7/5
             */
     public static String calculate(String value, String formula) {
+        if(ObjectUtils.isEmpty(formula))
+            return null;
         ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");
         formula = formula.replaceAll("\\{0\\}", value);
         Double result = null;

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