[ISSUE#2172] Fix the issue of ArrayIndexOutOfBoundsException

Co-authored-by: fantow <hahaha>

acl/src/main/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyFactory.java

@@ -55,11 +55,15 @@ public class RemoteAddressStrategyFactory {
                 return new MultipleRemoteAddressStrategy(AclUtils.getAddresses(remoteAddr, last));
             } else {
                 String[] strArray = StringUtils.split(remoteAddr, ".");
-                String four = strArray[3];
-                if (!four.startsWith("{")) {
+                // However a right IP String provided by user,it always can be divided into 4 parts by '.'.
+                if (strArray.length < 4) {
+                    throw new AclException(String.format("MultipleRemoteAddressStrategy has got a/some wrong format IP(s) ", remoteAddr));
+                }
+                String lastStr = strArray[strArray.length - 1];
+                if (!lastStr.startsWith("{")) {
                     throw new AclException(String.format("MultipleRemoteAddressStrategy netaddress examine scope Exception netaddress", remoteAddr));
                 }
-                return new MultipleRemoteAddressStrategy(AclUtils.getAddresses(remoteAddr, four));
+                return new MultipleRemoteAddressStrategy(AclUtils.getAddresses(remoteAddr, lastStr));
             }
         } else if (AclUtils.isComma(remoteAddr)) {
             return new MultipleRemoteAddressStrategy(StringUtils.split(remoteAddr, ","));

acl/src/test/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyTest.java

@@ -198,6 +198,16 @@ public class RemoteAddressStrategyTest {
         remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
         plainAccessResource.setWhiteRemoteAddress("::1,2,3}");
         remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("192.168.1.{1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("192.168.1.{1,2}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("192.168.{1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("{192.168.1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("{192.168.1.1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
     }
 
     private void multipleNetaddressStrategyTest(RemoteAddressStrategy remoteAddressStrategy) {