diff --git a/.gitignore b/.gitignore
index d99a1b1..94b7950 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,53 +1,10 @@
-# ---> Java
-# Compiled class file
-*.class
-
-# Log file
-*.log
-
-# BlueJ files
-*.ctxt
-
-# Mobile Tools for Java (J2ME)
-.mtj.tmp/
-
-# Package Files #
-*.jar
-*.war
-*.nar
-*.ear
-*.zip
-*.tar.gz
-*.rar
-
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
-
-# ---> macOS
-# General
+build
+classes
 .DS_Store
-.AppleDouble
-.LSOverride
-
-# Icon must end with two \r
-Icon

-
-# Thumbnails
-._*
-
-# Files that might appear in the root of a volume
-.DocumentRevisions-V100
-.fseventsd
-.Spotlight-V100
-.TemporaryItems
-.Trashes
-.VolumeIcon.icns
-.com.apple.timemachine.donotpresent
-
-# Directories potentially created on remote AFP share
-.AppleDB
-.AppleDesktop
-Network Trash Folder
-Temporary Items
-.apdisk
-
+.gradle
+.classpath
+.project
+.settings
+*.iml
+*.ipr
+*.iws
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..abcb4ab
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,92 @@
+apply plugin: 'java'
+apply plugin: 'eclipse'
+apply plugin: 'idea'
+
+def JsonSlurper = Class.forName('groovy.json.JsonSlurper');
+def buildJSON = JsonSlurper.newInstance().parseText(new File("build.json").text)
+
+if (buildJSON.application) { apply plugin: 'application' }
+
+def baseProjectName = buildJSON?.project?.name ?: '__project_name__';
+def shellCommandName = baseProjectName
+def eclipseProjectName = baseProjectName
+def eclipseProjectComment = buildJSON?.project?.comment ?: '__project_name_comment__'
+def jarManifestMainClass = buildJSON?.project?.main ?: 'SampleMain'
+
+if (buildJSON.application) { mainClassName = jarManifestMainClass }
+archivesBaseName = buildJSON?.project?.archiveName ?: baseProjectName
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+def addRepo = new File(System.getProperty("user.home"), ".build_add.repo")
+
+repositories {
+  mavenLocal()
+  // mavenCentral()
+  maven() { url 'https://maven.aliyun.com/repository/central' }
+  if (addRepo.exists()) { maven() { url addRepo.text.trim() } }
+}
+
+tasks.withType(JavaCompile) {
+  options.encoding = "UTF-8"  
+}
+
+// '-x test' skip unit test
+defaultTasks 'build'
+
+buildscript {
+    repositories {
+        mavenLocal()
+        maven() { url 'https://maven.aliyun.com/repository/central' }
+        mavenCentral()
+        jcenter()
+    }
+    dependencies {
+        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.5.11.RELEASE")
+    }
+}
+apply plugin: 'org.springframework.boot'
+springBoot {
+    mainClass = jarManifestMainClass
+}
+
+dependencies {
+    compile files(fileTree(dir: 'lib', includes: ['*.jar'], excludes: ['*-sources.jar', '*-javadoc.jar']))
+
+    if (buildJSON.repo != null && buildJSON.repo.dependencies != null) {
+        buildJSON.repo.dependencies.each {
+            compile("${it}")
+        }
+    }
+    if (buildJSON.repo != null && buildJSON.repo.testDependencies != null) {
+        buildJSON.repo.testDependencies.each {
+            testCompile("${it}")
+        }
+    }
+}
+
+eclipse {
+  project {
+    name = eclipseProjectName
+    comment = eclipseProjectComment
+  }
+  classpath {
+    defaultOutputDir = file('classes')
+    downloadSources = true
+    file {
+      whenMerged { classpath ->
+        classpath.entries.findAll { it.kind=='lib' }.each {
+          if ((it.path != null) && (it.sourcePath == null) && file(it.path.replace(".jar", "-sources.jar")).exists()) { 
+            it.sourcePath = getFileReferenceFactory().fromPath(it.path.replace(".jar", "-sources.jar"))
+          }
+        }
+      }
+    }
+  }
+}
+
+eclipseJdt << {
+  File f = file('.settings/org.eclipse.core.resources.prefs')
+  f.write('eclipse.preferences.version=1\n')
+  f.append('encoding/<project>=utf-8')
+}
diff --git a/build.json b/build.json
new file mode 100644
index 0000000..3d34023
--- /dev/null
+++ b/build.json
@@ -0,0 +1,22 @@
+{
+    "project": {
+        "name": "spring-boot-sample",
+        "main": "me.hatter.sample.Application",
+        "archiveName": "spring-boot-sample"
+    },
+    "application": false,
+    "java": "1.8",
+    "builder": {
+        "name": "gradle",
+        "version": "4.10"
+    },
+    "repo": {
+        "dependencies": [
+            "me.hatter:commons:3.0",
+            "org.springframework.boot:spring-boot-starter-web:2.3.12.RELEASE"
+        ],
+        "testDependencies": [
+            "junit:junit:4.12"
+        ]
+    }
+}
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..4eba6ad
--- /dev/null
+++ b/justfile
@@ -0,0 +1,5 @@
+_:
+  @just --list
+
+run:
+  buildj bootRun
diff --git a/src/main/java/me/hatter/sample/Application.java b/src/main/java/me/hatter/sample/Application.java
new file mode 100644
index 0000000..1683587
--- /dev/null
+++ b/src/main/java/me/hatter/sample/Application.java
@@ -0,0 +1,28 @@
+package me.hatter.sample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@ComponentScan(basePackages = "me.hatter.sample")
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+//    @Bean
+//    public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
+//        return args -> {
+//
+//            System.out.println("Let's inspect the beans provided by Spring Boot:");
+//
+//            String[] beanNames = ctx.getBeanDefinitionNames();
+//            Arrays.sort(beanNames);
+//            for (String beanName : beanNames) {
+//                System.out.println(beanName);
+//            }
+//
+//        };
+//    }
+}
diff --git a/src/main/java/me/hatter/sample/common/WebConfig.java b/src/main/java/me/hatter/sample/common/WebConfig.java
new file mode 100644
index 0000000..d662b15
--- /dev/null
+++ b/src/main/java/me/hatter/sample/common/WebConfig.java
@@ -0,0 +1,21 @@
+package me.hatter.sample.common;
+
+import me.hatter.sample.common.resolver.SystemTimeArgumentResolver;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.servlet.config.annotation.*;
+
+import java.util.List;
+
+@Configuration
+public class WebConfig extends WebMvcConfigurerAdapter {
+
+    @Autowired
+    SystemTimeArgumentResolver systemTimeArgumentResolver;
+
+    @Override
+    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
+        argumentResolvers.add(systemTimeArgumentResolver);
+    }
+}
diff --git a/src/main/java/me/hatter/sample/common/annotation/SystemTime.java b/src/main/java/me/hatter/sample/common/annotation/SystemTime.java
new file mode 100644
index 0000000..73e7a9a
--- /dev/null
+++ b/src/main/java/me/hatter/sample/common/annotation/SystemTime.java
@@ -0,0 +1,9 @@
+package me.hatter.sample.common.annotation;
+
+import java.lang.annotation.*;
+
+@Target(ElementType.PARAMETER)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface SystemTime {
+}
diff --git a/src/main/java/me/hatter/sample/common/resolver/SystemTimeArgumentResolver.java b/src/main/java/me/hatter/sample/common/resolver/SystemTimeArgumentResolver.java
new file mode 100644
index 0000000..6d9e505
--- /dev/null
+++ b/src/main/java/me/hatter/sample/common/resolver/SystemTimeArgumentResolver.java
@@ -0,0 +1,24 @@
+package me.hatter.sample.common.resolver;
+
+import me.hatter.sample.common.annotation.SystemTime;
+import org.springframework.core.MethodParameter;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+import java.util.Date;
+
+@Component
+public class SystemTimeArgumentResolver implements HandlerMethodArgumentResolver {
+    @Override
+    public boolean supportsParameter(MethodParameter parameter) {
+        return parameter.hasParameterAnnotation(SystemTime.class);
+    }
+
+    @Override
+    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
+        return new Date();
+    }
+}
diff --git a/src/main/java/me/hatter/sample/web/controller/SampleController.java b/src/main/java/me/hatter/sample/web/controller/SampleController.java
new file mode 100644
index 0000000..530b11d
--- /dev/null
+++ b/src/main/java/me/hatter/sample/web/controller/SampleController.java
@@ -0,0 +1,17 @@
+package me.hatter.sample.web.controller;
+
+import me.hatter.sample.common.annotation.SystemTime;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Date;
+
+@RestController
+public class SampleController {
+
+    @GetMapping("/")
+    public String home(
+            @SystemTime Date time) {
+        return "Hello, World: " + time;
+    }
+}