增加String工具类

77586532 · patpat · 45832d6f · 77586532
Commit 77586532 authored Jul 15, 2019 by patpat
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app/src/main/java/com/bgycc/smartcanteen/util/StringUtil.java
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--- a/app/src/main/java/com/bgycc/smartcanteen/util/StringUtil.java
+++ b/app/src/main/java/com/bgycc/smartcanteen/util/StringUtil.java
+package com.bgycc.smartcanteen.util;
+
+public class StringUtil {
+
+    public static boolean isEmpty(String str) {
+        return str == null || str.isEmpty();
+    }
+}