From b10c0f8706061ef3c4bd5265d783313b1a75b0ba Mon Sep 17 00:00:00 2001
From: work <test@gmail.com>
Date: Fri, 18 Jun 2021 11:38:01 +0800
Subject: [PATCH] feat(MapUtils): Add empty string judgment

---
 .../apache/commons/collections4/MapUtils.java    |  2 +-
 .../commons/collections4/MapUtilsTest.java       | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/commons/collections4/MapUtils.java b/src/main/java/org/apache/commons/collections4/MapUtils.java
index a84b783201..8db19abe2e 100644
--- a/src/main/java/org/apache/commons/collections4/MapUtils.java
+++ b/src/main/java/org/apache/commons/collections4/MapUtils.java
@@ -1136,7 +1136,7 @@ public static <K> short getShortValue(final Map<? super K, ?> map, final K key,
     public static <K> String getString(final Map<? super K, ?> map, final K key) {
         if (map != null) {
             final Object answer = map.get(key);
-            if (answer != null) {
+            if (answer != null && answer != "") {
                 return answer.toString();
             }
         }
diff --git a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
index e6aa766168..cce10758d8 100644
--- a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
@@ -50,6 +50,7 @@
 import org.apache.commons.collections4.map.LazyMap;
 import org.apache.commons.collections4.map.MultiValueMap;
 import org.apache.commons.collections4.map.PredicatedMap;
+import org.apache.commons.lang3.StringUtils;
 import org.junit.jupiter.api.Test;
 
 /**
@@ -1314,4 +1315,19 @@ private char getDecimalSeparator() {
         }
         return '.';
     }
+
+    @Test
+    public void testBlankCharSequenceMap(){
+        final Map<String, String> blankMap = new HashMap<>();
+        blankMap.put("key1",null);
+        blankMap.put("key2","");
+        blankMap.put("key3","LGD");
+        String value1 = MapUtils.getString(blankMap, "key1");
+        String value2 = MapUtils.getString(blankMap, "key2");
+        String value3 = MapUtils.getString(blankMap, "key3");
+        assertTrue(StringUtils.isBlank(value1));
+        assertTrue(StringUtils.isBlank(value2));
+        assertTrue(StringUtils.isNotBlank(value3));
+
+    }
 }