diff --git a/p3c-pmd/src/main/resources/messages.xml b/p3c-pmd/src/main/resources/messages.xml
index 9b51500..19a9e1f 100644
--- a/p3c-pmd/src/main/resources/messages.xml
+++ b/p3c-pmd/src/main/resources/messages.xml
@@ -30,7 +30,7 @@
         <![CDATA[变量名【%s】不符合lowerCamelCase命名风格]]>
     </entry>
     <entry key="java.naming.PackageNamingRule.violation.msg">
-        <![CDATA[包名【%s】应全部小写]]>
+        <![CDATA[包名【%s】应全部为小写字母和数字组成]]>
     </entry>
     <entry key="java.naming.ServiceOrDaoClassShouldEndWithImplRule.violation.msg">
         <![CDATA[类名【%s】应以Impl结尾]]>
diff --git a/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/naming/xml/ArrayNamingShouldHaveBracketRule.xml b/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/naming/xml/ArrayNamingShouldHaveBracketRule.xml
index 96ec3a0..ba45a57 100644
--- a/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/naming/xml/ArrayNamingShouldHaveBracketRule.xml
+++ b/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/naming/xml/ArrayNamingShouldHaveBracketRule.xml
@@ -33,4 +33,30 @@
         <expected-problems>0</expected-problems>
         <code-ref id="ArrayTypeStyleTest1" />
     </test-code>
+
+    <code-fragment id="ArrayTypeStyleTest2">
+        <![CDATA[
+  public class ArrayTypeStyleTest{
+    public void ConfParse(String str){
+        TreeMap<String, String> mapConfKeyValue = new TreeMap<>();
+        String[] params = str.split("&");
+        for (String param : params) {
+            String fields[] = param.split("=");
+            if (fields.length != 2) {
+                continue;
+            }
+            String key = fields[0].trim();
+            String value = fields[1].trim();
+            mapConfKeyValue.put(key, value);
+        }
+    }
+}
+    ]]>
+    </code-fragment>
+    <test-code>
+        <description>array should be array[]</description>
+        <expected-problems>1</expected-problems>
+        <expected-linenumbers>6</expected-linenumbers>
+        <code-ref id="ArrayTypeStyleTest2" />
+    </test-code>
 </test-data>