diff --git a/idea-plugin/README.md b/idea-plugin/README.md
index 9833e6e6751e5159ec6c0fcbdafc071cd2ae0582..488e5d6179b075586608ab1dc4b41835e53efaa8 100644
--- a/idea-plugin/README.md
+++ b/idea-plugin/README.md
@@ -16,7 +16,7 @@ cd p3c-idea
 cd p3c-idea
 ../gradlew runIde
 # run specific IDEA
-../gradlew runIde -Pidea_version=14.1.7
+../gradlew runIde -Pidea_version=2018.3
 ```
 
 ## <font color="green">Use p3c-common as your plugin dependency</font>
diff --git a/idea-plugin/gradle/wrapper/gradle-wrapper.jar b/idea-plugin/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd051603d91cc39de6cb000dd98fe6b02..62d4c053550b91381bbd28b1afc82d634bf73a8a 100644
Binary files a/idea-plugin/gradle/wrapper/gradle-wrapper.jar and b/idea-plugin/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/idea-plugin/gradle/wrapper/gradle-wrapper.properties b/idea-plugin/gradle/wrapper/gradle-wrapper.properties
index bb8b2fc26b2e572c79d7212a4f6f11057c6787f7..6c9a2247756f212ea610200280a7ee2085114209 100644
--- a/idea-plugin/gradle/wrapper/gradle-wrapper.properties
+++ b/idea-plugin/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/idea-plugin/gradlew b/idea-plugin/gradlew
index af6708ff229fda75da4f7cc4da4747217bac4d53..fbd7c515832dab7b01092e80db76e5e03fe32d29 100755
--- a/idea-plugin/gradlew
+++ b/idea-plugin/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -66,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -109,10 +126,11 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -138,19 +156,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +177,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/idea-plugin/gradlew.bat b/idea-plugin/gradlew.bat
index 6d57edc706c93465988754383a2d7ff353d4e79f..5093609d512a96947851d39fa2dc05df2af2248e 100644
--- a/idea-plugin/gradlew.bat
+++ b/idea-plugin/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
@@ -65,6 +84,7 @@ set CMD_LINE_ARGS=%*
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
 
diff --git a/idea-plugin/p3c-common/build.gradle b/idea-plugin/p3c-common/build.gradle
index 9031bd386f889c6d3834ceee6d484c55c2b19019..69ff629e6fff57cd03324c53e51752a669e645a0 100644
--- a/idea-plugin/p3c-common/build.gradle
+++ b/idea-plugin/p3c-common/build.gradle
@@ -46,7 +46,7 @@ ext.isReleaseVersion = !version.endsWith("SNAPSHOT")
 
 dependencies {
     compile group: 'org.freemarker', name: 'freemarker', version: '2.3.25-incubating'
-    compile 'com.alibaba.p3c:p3c-pmd:2.0.1'
+    compile 'com.alibaba.p3c:p3c-pmd:2.1.0'
     compile group: 'org.javassist', name: 'javassist', version: '3.21.0-GA'
 }
 
diff --git a/p3c-pmd/pom.xml b/p3c-pmd/pom.xml
index 82e9a717e00fd750a3d27ffb48e6fa5eabcf187b..c465b924e37d59b8bf3a4038e1a23f91d67d496d 100644
--- a/p3c-pmd/pom.xml
+++ b/p3c-pmd/pom.xml
@@ -9,7 +9,7 @@
   </parent>
   <groupId>com.alibaba.p3c</groupId>
   <artifactId>p3c-pmd</artifactId>
-  <version>2.1.0</version>
+  <version>2.1.1</version>
   <packaging>jar</packaging>
   <name>p3c-pmd</name>
   <properties>
@@ -253,7 +253,7 @@
           </tags>
         </configuration>
       </plugin>
-     <!-- <plugin>
+      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-gpg-plugin</artifactId>
         <version>1.6</version>
@@ -266,7 +266,7 @@
             </goals>
           </execution>
         </executions>
-      </plugin>-->
+      </plugin>
     </plugins>
   </build>
 </project>
diff --git a/p3c-pmd/src/main/java/com/alibaba/p3c/pmd/lang/java/rule/comment/ClassMustHaveAuthorRule.java b/p3c-pmd/src/main/java/com/alibaba/p3c/pmd/lang/java/rule/comment/ClassMustHaveAuthorRule.java
index 78372b7fb05fdec1374d8e80a5419a543d0f7614..b4f407abeadfdd817ca6db7128975f34af5b85aa 100644
--- a/p3c-pmd/src/main/java/com/alibaba/p3c/pmd/lang/java/rule/comment/ClassMustHaveAuthorRule.java
+++ b/p3c-pmd/src/main/java/com/alibaba/p3c/pmd/lang/java/rule/comment/ClassMustHaveAuthorRule.java
@@ -39,7 +39,7 @@ import net.sourceforge.pmd.lang.java.ast.Comment;
  */
 public class ClassMustHaveAuthorRule extends AbstractAliCommentRule {
 
-    private static final Pattern AUTHOR_PATTERN = Pattern.compile(".*@author.*",
+    private static final Pattern AUTHOR_PATTERN = Pattern.compile(".*@[Aa]uthor.*",
         Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
 
     private static final String MESSAGE_KEY_PREFIX = "java.comment.ClassMustHaveAuthorRule.violation.msg";
diff --git a/p3c-pmd/src/main/resources/rulesets/java/ali-other.xml b/p3c-pmd/src/main/resources/rulesets/java/ali-other.xml
index 09c5a084e70a17b7482997b78852889a2fb38f33..c9b26ed3c9bf9215f7f1457b7465a815c5adb54c 100644
--- a/p3c-pmd/src/main/resources/rulesets/java/ali-other.xml
+++ b/p3c-pmd/src/main/resources/rulesets/java/ali-other.xml
@@ -95,13 +95,13 @@ Positive example:
         <example>
             <![CDATA[
 Negative example:
-    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+    SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd HH:mm:ss");
  ]]>
         </example>
         <example>
             <![CDATA[
 Positive example:
-        SimpleDateFormat format = new SimpleDateFormat("YYYY-mm-dd HH:mm:ss");
+        SimpleDateFormat format = new SimpleDateFormat("YYYY-MM-dd HH:mm:ss");
 ]]>
         </example>
     </rule>
diff --git a/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/comment/xml/ClassMustHaveAuthorRule.xml b/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/comment/xml/ClassMustHaveAuthorRule.xml
index f2d50767566ad03bbed29ab178ed9745d7203320..cc24eadbbe49369f7d4a6602bd6bb0ec8547fa4c 100644
--- a/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/comment/xml/ClassMustHaveAuthorRule.xml
+++ b/p3c-pmd/src/test/resources/com/alibaba/p3c/pmd/lang/java/rule/comment/xml/ClassMustHaveAuthorRule.xml
@@ -30,6 +30,20 @@ public class ClassMustHaveAuthorRule {}
 		<code-ref id="class-with-author" />
 	</test-code>
 
+	<code-fragment id="class-with-author-uppercase"><![CDATA[
+/**
+ * @Author keriezhang
+ * @date 2017/07/18
+ */
+public class ClassMustHaveAuthorRule {}
+    ]]>
+	</code-fragment>
+	<test-code>
+		<description>Class with author uppercase.</description>
+		<expected-problems>0</expected-problems>
+		<code-ref id="class-with-author-uppercase" />
+	</test-code>
+
 	<code-fragment id="class-with-date"><![CDATA[
 /**
  * @date 2016/12/14