diff --git a/.gitignore b/.gitignore
index 05e27e0bb70fe7559f83ca617a7dbef9fc310a02..7760bdcfe4706b2fc20c1c8643ca042338edb311 100644
--- a/.gitignore
+++ b/.gitignore
@@ -83,3 +83,4 @@ buildNumber.properties
 
 /.idea/.name
 /.idea/vcs.xml
+.idea
diff --git a/.idea/.name b/.idea/.name
deleted file mode 100644
index 523849b74459f597d170cfeff24a150965c51a2b..0000000000000000000000000000000000000000
--- a/.idea/.name
+++ /dev/null
@@ -1 +0,0 @@
-demo-parent
\ No newline at end of file
diff --git a/.idea/compiler.xml b/.idea/compiler.xml
deleted file mode 100644
index ed3c7f419ccf77853c5b7c777a91951f099053fb..0000000000000000000000000000000000000000
--- a/.idea/compiler.xml
+++ /dev/null
@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CompilerConfiguration">
-    <annotationProcessing>
-      <profile name="Maven default annotation processors profile" enabled="true">
-        <sourceOutputDir name="target/generated-sources/annotations" />
-        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
-        <outputRelativeToContentRoot value="true" />
-        <module name="flink-quickstart" />
-        <module name="kafka" />
-      </profile>
-    </annotationProcessing>
-    <bytecodeTargetLevel>
-      <module name="demo-parent" target="1.8" />
-      <module name="flink-quickstart" target="1.8" />
-      <module name="kafka" target="1.8" />
-    </bytecodeTargetLevel>
-  </component>
-  <component name="JavacSettings">
-    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
-      <module name="kafka" options="-parameters" />
-    </option>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
deleted file mode 100644
index 63fd03358dfa2da1caba690cfffa56acf29f878e..0000000000000000000000000000000000000000
--- a/.idea/encodings.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding">
-    <file url="file://$PROJECT_DIR$/../flink/maven" charset="UTF-8" />
-    <file url="file://$PROJECT_DIR$" charset="UTF-8" />
-    <file url="file://$PROJECT_DIR$/kafka" charset="UTF-8" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
deleted file mode 100644
index 6560a98983ec708cf9d8b5c5c3776d7bd39c475b..0000000000000000000000000000000000000000
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ /dev/null
@@ -1,36 +0,0 @@
-<component name="InspectionProjectProfileManager">
-  <profile version="1.0">
-    <option name="myName" value="Project Default" />
-    <inspection_tool class="JavaDoc" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="TOP_LEVEL_CLASS_OPTIONS">
-        <value>
-          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
-          <option name="REQUIRED_TAGS" value="" />
-        </value>
-      </option>
-      <option name="INNER_CLASS_OPTIONS">
-        <value>
-          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
-          <option name="REQUIRED_TAGS" value="" />
-        </value>
-      </option>
-      <option name="METHOD_OPTIONS">
-        <value>
-          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
-          <option name="REQUIRED_TAGS" value="@return@param@throws or @exception" />
-        </value>
-      </option>
-      <option name="FIELD_OPTIONS">
-        <value>
-          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
-          <option name="REQUIRED_TAGS" value="" />
-        </value>
-      </option>
-      <option name="IGNORE_DEPRECATED" value="false" />
-      <option name="IGNORE_JAVADOC_PERIOD" value="true" />
-      <option name="IGNORE_DUPLICATED_THROWS" value="false" />
-      <option name="IGNORE_POINT_TO_ITSELF" value="false" />
-      <option name="myAdditionalJavadocTags" value="date" />
-    </inspection_tool>
-  </profile>
-</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index abde0f9e07d1380d124bb83d7db573b753ce63cc..0000000000000000000000000000000000000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="MavenProjectsManager">
-    <option name="originalFiles">
-      <list>
-        <option value="$PROJECT_DIR$/pom.xml" />
-        <option value="$PROJECT_DIR$/../flink/maven/pom.xml" />
-      </list>
-    </option>
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_12" project-jdk-name="12" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/classes" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
deleted file mode 100644
index d2b7a749a57c52a1adb1e37dd2d24315c6e635ae..0000000000000000000000000000000000000000
--- a/.idea/modules.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/demo-parent.iml" filepath="$PROJECT_DIR$/demo-parent.iml" />
-      <module fileurl="file://$PROJECT_DIR$/../flink/maven/flink-quickstart.iml" filepath="$PROJECT_DIR$/../flink/maven/flink-quickstart.iml" />
-      <module fileurl="file://$PROJECT_DIR$/kafka/kafka.iml" filepath="$PROJECT_DIR$/kafka/kafka.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index 35eb1ddfbbc029bcab630581847471d7f238ec53..0000000000000000000000000000000000000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file