diff --git a/.gitignore b/.gitignore
index bfa73fc..dc513e5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,3 +46,7 @@ hs_err_pid*
 
 *.iml
 .idea
+gradle
+.gradle
+target
+build
diff --git a/README.md b/README.md
index b9d6105..59fe00d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
-# kafka-test
+## 简介
+
+kafka 学习笔记
+
+## 相关博客
+- [Kafka API操作实践](https://www.zeekling.cn/articles/2020/05/17/1589721212901.html)
 
-kafka 学习笔记
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..7289a65
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,19 @@
+plugins {
+    id 'java'
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+ext{
+
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile group: 'org.apache.kafka', name: 'kafka-clients', version: '2.4.1'
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..2fe81a7
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,183 @@
+#!/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
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$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
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# 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
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        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" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# 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"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..24467a1
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,100 @@
+@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
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@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" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+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%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..be4ec98
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'kafka-test'
+
diff --git a/src/main/java/com/thinker/kafka/consumer/CustomConsumer.java b/src/main/java/com/thinker/kafka/consumer/CustomConsumer.java
new file mode 100644
index 0000000..1afae6d
--- /dev/null
+++ b/src/main/java/com/thinker/kafka/consumer/CustomConsumer.java
@@ -0,0 +1,37 @@
+package com.thinker.kafka.consumer;
+
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+
+import java.util.Collections;
+import java.util.Properties;
+
+/**
+ * @author zeekling [lingzhaohui@zeekling.cn]
+ * @version 1.0
+ * @apiNote
+ * @since 2020-05-17
+ */
+public class CustomConsumer {
+
+    public static void main(String[] args) {
+        Properties props = new Properties();
+        props.put("bootstrap.servers", "localhost:9092");
+        props.put("group.id", "test");//消费者组，只要group.id相同，就属于同一个消费者组
+        props.put("enable.auto.commit", "false");//自动提交offset
+//        props.put("auto.commit.interval.ms", "1000");
+        props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
+        props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
+        KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
+        consumer.subscribe(Collections.singletonList("first"));
+        while (true) {
+            ConsumerRecords<String, String> records = consumer.poll(100);
+            for (ConsumerRecord<String, String> record : records) {
+                System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
+            }
+            consumer.commitSync();
+        }
+    }
+
+}
diff --git a/src/main/java/com/thinker/kafka/producer/CustomProducerCallBack.java b/src/main/java/com/thinker/kafka/producer/CustomProducerCallBack.java
new file mode 100644
index 0000000..4f34638
--- /dev/null
+++ b/src/main/java/com/thinker/kafka/producer/CustomProducerCallBack.java
@@ -0,0 +1,46 @@
+package com.thinker.kafka.producer;
+
+import org.apache.kafka.clients.producer.*;
+
+import java.util.Properties;
+import java.util.concurrent.ExecutionException;
+
+/**
+ * @author zeekling [lingzhaohui@zeekling.cn]
+ * @version 1.0
+ * @apiNote
+ * @since 2020-05-17
+ */
+public class CustomProducerCallBack {
+
+
+    public static void main(String[] args) throws ExecutionException, InterruptedException {
+        Properties props = new Properties();
+        props.put("bootstrap.servers", "localhost:9092");//kafka集群，broker-list
+        props.put("acks", "all");
+        props.put("retries", 1);//重试次数
+        props.put("batch.size", 16384);//批次大小
+        props.put("linger.ms", 1);//等待时间
+        props.put("buffer.memory", 33554432);//RecordAccumulator缓冲区大小
+        props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
+        props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
+
+        Producer<String, String> producer = new KafkaProducer<>(props);
+        for (int i = 0; i < 100; i++) {
+            producer.send(new ProducerRecord<String, String>("first", Integer.toString(i), Integer.toString(i)), new Callback() {
+
+                //回调函数，该方法会在Producer收到ack时调用，为异步调用
+                @Override
+                public void onCompletion(RecordMetadata metadata, Exception exception) {
+                    if (exception == null) {
+                        System.out.println("success->" + metadata.offset());
+                    } else {
+                        exception.printStackTrace();
+                    }
+                }
+            });
+        }
+        producer.close();
+    }
+
+}
diff --git a/src/main/java/com/thinker/kafka/producer/CustomProducerNoCallBack.java b/src/main/java/com/thinker/kafka/producer/CustomProducerNoCallBack.java
new file mode 100644
index 0000000..07db61d
--- /dev/null
+++ b/src/main/java/com/thinker/kafka/producer/CustomProducerNoCallBack.java
@@ -0,0 +1,37 @@
+package com.thinker.kafka.producer;
+
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.Producer;
+import org.apache.kafka.clients.producer.ProducerRecord;
+
+import java.util.Properties;
+import java.util.concurrent.ExecutionException;
+
+/**
+ * @author zeekling [lingzhaohui@zeekling.cn]
+ * @version 1.0
+ * @apiNote
+ * @since 2020-05-17
+ */
+public class CustomProducerNoCallBack {
+
+
+    public static void main(String[] args) throws ExecutionException, InterruptedException {
+        Properties props = new Properties();
+        props.put("bootstrap.servers", "localhost:9092");//kafka集群，broker-list
+        props.put("acks", "all");
+        props.put("retries", 1);//重试次数
+        props.put("batch.size", 16384);//批次大小
+        props.put("linger.ms", 1);//等待时间
+        props.put("buffer.memory", 33554432);//RecordAccumulator缓冲区大小
+        props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
+        props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
+
+        Producer<String, String> producer = new KafkaProducer<>(props);
+        for (int i = 0; i < 100; i++) {
+            producer.send(new ProducerRecord<String, String>("first", Integer.toString(i), Integer.toString(i)));
+        }
+        producer.close();
+    }
+
+}
diff --git a/src/main/java/com/thinker/kafka/producer/CustomProducerSync.java b/src/main/java/com/thinker/kafka/producer/CustomProducerSync.java
new file mode 100644
index 0000000..eeeadb4
--- /dev/null
+++ b/src/main/java/com/thinker/kafka/producer/CustomProducerSync.java
@@ -0,0 +1,37 @@
+package com.thinker.kafka.producer;
+
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.Producer;
+import org.apache.kafka.clients.producer.ProducerRecord;
+
+import java.util.Properties;
+import java.util.concurrent.ExecutionException;
+
+/**
+ * @author zeekling [lingzhaohui@zeekling.cn]
+ * @version 1.0
+ * @apiNote
+ * @since 2020-05-17
+ */
+public class CustomProducerSync {
+
+
+    public static void main(String[] args) throws ExecutionException, InterruptedException {
+        Properties props = new Properties();
+        props.put("bootstrap.servers", "localhost:9092");//kafka集群，broker-list
+        props.put("acks", "all");
+        props.put("retries", 1);//重试次数
+        props.put("batch.size", 16384);//批次大小
+        props.put("linger.ms", 1);//等待时间
+        props.put("buffer.memory", 33554432);//RecordAccumulator缓冲区大小
+        props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
+        props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
+
+        Producer<String, String> producer = new KafkaProducer<>(props);
+        for (int i = 0; i < 100; i++) {
+            producer.send(new ProducerRecord<String, String>("first", Integer.toString(i), Integer.toString(i))).get();
+        }
+        producer.close();
+    }
+
+}