增加修改功能

02387dcd · zengtianlai3 · 5f7b7eda · 02387dcd
Commit 02387dcd authored Jun 08, 2022 by zengtianlai3
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JsonUtil.java license/src/main/java/iot/sixiang/license/util/JsonUtil.java +15 -0

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--- a/license/src/main/java/iot/sixiang/license/util/JsonUtil.java
+++ b/license/src/main/java/iot/sixiang/license/util/JsonUtil.java
+package iot.sixiang.license.util;
+
+import com.alibaba.fastjson.JSONObject;
+
+/**
+ * Created by m33 on 2022/6/8 9:57
+ */
+public class JsonUtil {
+    public static boolean isNull(String str) {
+        if(str == null || str.isEmpty()) {
+            return true;
+        }
+        return false;
+    }
+}