diff --git a/.github/workflows/webmvc-method-arg-resolver.yml b/.github/workflows/webmvc-method-arg-resolver.yml
new file mode 100644
index 0000000..2a4dab4
--- /dev/null
+++ b/.github/workflows/webmvc-method-arg-resolver.yml
@@ -0,0 +1,32 @@
+name: webmvc-method-arg-resolver
+on:
+  push:
+    paths:
+      - "webmvc-method-arg-resolver/**"
+    branches: [master]
+  pull_request:
+    paths:
+      - "webmvc-method-arg-resolver/**"
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          # Disabling shallow clone is recommended for improving relevancy of reporting
+          fetch-depth: 0
+      - name: Set up JDK
+        uses: actions/setup-java@v2
+        with:
+          java-version: "21"
+          distribution: "zulu"
+          cache: "gradle"
+      - name: Build with Gradle
+        run: |
+          cd webmvc-method-arg-resolver
+          chmod a+x ./gradlew
+          ./gradlew clean build
+     
diff --git a/webmvc-method-arg-resolver/.gitignore b/webmvc-method-arg-resolver/.gitignore
new file mode 100644
index 0000000..5a979af
--- /dev/null
+++ b/webmvc-method-arg-resolver/.gitignore
@@ -0,0 +1,40 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Kotlin ###
+.kotlin
diff --git a/webmvc-method-arg-resolver/build.gradle.kts b/webmvc-method-arg-resolver/build.gradle.kts
new file mode 100644
index 0000000..fed08ec
--- /dev/null
+++ b/webmvc-method-arg-resolver/build.gradle.kts
@@ -0,0 +1,48 @@
+plugins {
+	kotlin("jvm") version "1.9.25"
+	kotlin("plugin.spring") version "1.9.25"
+	id("org.springframework.boot") version "3.4.0-M3"
+	id("io.spring.dependency-management") version "1.1.6"
+}
+
+group = "com.example"
+version = "0.0.1-SNAPSHOT"
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+repositories {
+	mavenCentral()
+	maven { url = uri("https://repo.spring.io/milestone") }
+}
+
+dependencies {
+	implementation("org.springframework.boot:spring-boot-starter-web")
+	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+	implementation("org.jetbrains.kotlin:kotlin-reflect")
+
+	testImplementation("org.springframework.boot:spring-boot-starter-webflux")
+	testImplementation("org.springframework.boot:spring-boot-starter-test"){
+		// use mockk as mocking framework
+		exclude(module = "mockito-core")
+		exclude(module = "android-json")
+	}
+	testImplementation("io.mockk:mockk-jvm:1.13.12")
+	testImplementation("com.ninja-squad:springmockk:4.0.2")
+	testImplementation("io.kotest:kotest-assertions-core-jvm:5.9.1")
+	testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
+	testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+kotlin {
+	compilerOptions {
+		freeCompilerArgs.addAll("-Xjsr305=strict")
+	}
+}
+
+tasks.withType<Test> {
+	useJUnitPlatform()
+}
diff --git a/webmvc-method-arg-resolver/gradle/wrapper/gradle-wrapper.jar b/webmvc-method-arg-resolver/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..a4b76b9
Binary files /dev/null and b/webmvc-method-arg-resolver/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/webmvc-method-arg-resolver/gradle/wrapper/gradle-wrapper.properties b/webmvc-method-arg-resolver/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..0aaefbc
--- /dev/null
+++ b/webmvc-method-arg-resolver/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/webmvc-method-arg-resolver/gradlew b/webmvc-method-arg-resolver/gradlew
new file mode 100644
index 0000000..f5feea6
--- /dev/null
+++ b/webmvc-method-arg-resolver/gradlew
@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/webmvc-method-arg-resolver/gradlew.bat b/webmvc-method-arg-resolver/gradlew.bat
new file mode 100644
index 0000000..9d21a21
--- /dev/null
+++ b/webmvc-method-arg-resolver/gradlew.bat
@@ -0,0 +1,94 @@
+@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
+@rem SPDX-License-Identifier: Apache-2.0
+@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=.
+@rem This is normally unused
+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" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+: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 %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/webmvc-method-arg-resolver/settings.gradle.kts b/webmvc-method-arg-resolver/settings.gradle.kts
new file mode 100644
index 0000000..66431f0
--- /dev/null
+++ b/webmvc-method-arg-resolver/settings.gradle.kts
@@ -0,0 +1,7 @@
+pluginManagement {
+	repositories {
+		maven { url = uri("https://repo.spring.io/milestone") }
+		gradlePluginPortal()
+	}
+}
+rootProject.name = "demo"
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/DemoApplication.kt b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/DemoApplication.kt
new file mode 100644
index 0000000..76194b5
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/DemoApplication.kt
@@ -0,0 +1,12 @@
+package com.example.demo
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+
+@SpringBootApplication
+class DemoApplication
+
+fun main(args: Array<String>) {
+	runApplication<DemoApplication>(*args)
+}
+
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/DemoApplication.kt~ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/DemoApplication.kt~
new file mode 100644
index 0000000..7fd8c28
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/DemoApplication.kt~
@@ -0,0 +1,11 @@
+package com.example.demo
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+
+@SpringBootApplication
+class DemoApplication
+
+fun main(args: Array<String>) {
+	runApplication<DemoApplication>(*args)
+}
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/Message.kt b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/Message.kt
new file mode 100644
index 0000000..60cf659
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/Message.kt
@@ -0,0 +1,5 @@
+package com.example.demo
+
+import java.time.LocalDateTime
+
+data class Message(val id: Long, val body:String ,val createdAt: LocalDateTime = LocalDateTime.now())
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageController.kt b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageController.kt
new file mode 100644
index 0000000..fb28bfe
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageController.kt
@@ -0,0 +1,22 @@
+package com.example.demo
+
+import org.slf4j.LoggerFactory
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/messages")
+class MessageController(private val messages: MessageRepository) {
+
+
+	@GetMapping("")
+	fun getAll(sort: Map<String, Boolean>): List<Message> {
+		log.debug("sort by: $sort")
+		return messages.getAll(sort)
+	}
+
+	companion object{
+		private val log = LoggerFactory.getLogger(MessageController::class.java)
+	}
+}
\ No newline at end of file
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageController.kt~ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageController.kt~
new file mode 100644
index 0000000..c250603
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageController.kt~
@@ -0,0 +1,18 @@
+package com.example.demo
+
+import org.slf4j.LoggerFactory
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/messages")
+class MessageController(private val messages: MessageRepository) {
+	fun getAll(sort: Map<String, Boolean>): List<Message> {
+		log.debug("sort by: $sort")
+		return messages.getAll(sort)
+	}
+
+	companion object{
+		private val log = LoggerFactory.getLogger(MessageController::class.java)
+	}
+}
\ No newline at end of file
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageRepository.kt b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageRepository.kt
new file mode 100644
index 0000000..8ca83a5
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageRepository.kt
@@ -0,0 +1,6 @@
+package com.example.demo
+
+
+interface MessageRepository {
+    fun getAll(sort: Map<String, Boolean>): List<Message>
+}
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageRepository.kt~ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageRepository.kt~
new file mode 100644
index 0000000..dd05f03
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/MessageRepository.kt~
@@ -0,0 +1,7 @@
+package com.example.demo
+
+
+interface MessageRepository {
+    fun getAll(sort: Map<String, Boolean>): List<Message>
+
+}
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/WebConfig.kt b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/WebConfig.kt
new file mode 100644
index 0000000..e3660bc
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/WebConfig.kt
@@ -0,0 +1,53 @@
+package com.example.demo
+
+import org.slf4j.LoggerFactory
+import org.springframework.context.annotation.Configuration
+import org.springframework.core.MethodParameter
+import org.springframework.web.bind.support.WebDataBinderFactory
+import org.springframework.web.context.request.NativeWebRequest
+import org.springframework.web.context.request.ServletWebRequest
+import org.springframework.web.method.support.HandlerMethodArgumentResolver
+import org.springframework.web.method.support.ModelAndViewContainer
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
+
+@Configuration
+class WebConfig : WebMvcConfigurer {
+
+    override fun addArgumentResolvers(resolvers: MutableList<HandlerMethodArgumentResolver>) {
+        resolvers.add(SimpleSortMapHandlerMethodArgumentResolver())
+    }
+
+//    @Bean
+//    @Order(0)
+//    fun simpleSortMapHandlerMethodArgumentResolver() = SimpleSortMapHandlerMethodArgumentResolver()
+}
+
+class SimpleSortMapHandlerMethodArgumentResolver : HandlerMethodArgumentResolver {
+
+    override fun supportsParameter(parameter: MethodParameter): Boolean {
+        log.debug("test method param: {}", parameter)
+        return Map::class.java.isAssignableFrom(parameter.parameterType)
+    }
+
+    @Throws(Exception::class)
+    override fun resolveArgument(
+        parameter: MethodParameter,
+        mavContainer: ModelAndViewContainer?,
+        webRequest: NativeWebRequest,
+        binderFactor: WebDataBinderFactory?
+    ): Any {
+        val params = (webRequest as ServletWebRequest).parameterMap[parameter.parameterName]
+        log.debug("resolved args: $params")
+        if (params.isNullOrEmpty()) return emptyMap<String, Boolean>()
+
+        val paramValues = params[0].split(",").map { it.trim() }
+            .groupBy({ it -> if (it.startsWith("-")) it.substring(1) else it }, { it -> !it.startsWith("-") })
+            .mapValues { it.value.first() }
+        log.debug("converted sort result: $paramValues")
+        return paramValues
+    }
+
+    companion object {
+        private val log = LoggerFactory.getLogger(SimpleSortMapHandlerMethodArgumentResolver::class.java)
+    }
+}
\ No newline at end of file
diff --git a/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/internal/SimpleMessageRepository.kt b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/internal/SimpleMessageRepository.kt
new file mode 100644
index 0000000..4c37293
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/kotlin/com/example/demo/internal/SimpleMessageRepository.kt
@@ -0,0 +1,27 @@
+package com.example.demo.internal
+
+import com.example.demo.Message
+import com.example.demo.MessageRepository
+import org.springframework.stereotype.Repository
+
+@Repository
+class SimpleMessageRepository : MessageRepository {
+    val data = listOf(
+        Message(1, "Hello"),
+        Message(2, "World"),
+        Message(3, "Spring Boot"),
+        Message(4, "Kotlin")
+    )
+
+    override fun getAll(sort: Map<String, Boolean>): List<Message> {
+        if (sort.isNotEmpty() && sort.keys.contains("id")) {
+            if (sort["id"] == true)
+                return data.sortedBy { it.id }
+
+            if (sort["id"] == false)
+                return data.sortedByDescending { it.id }
+        }
+
+        return data.sortedBy { it.createdAt }.reversed()
+    }
+}
\ No newline at end of file
diff --git a/webmvc-method-arg-resolver/src/main/resources/application.properties b/webmvc-method-arg-resolver/src/main/resources/application.properties
new file mode 100644
index 0000000..4d17e7c
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+spring.application.name=demo
+logging.level.com.example.demo=debug
+logging.level.web=debug
+
diff --git a/webmvc-method-arg-resolver/src/test/kotlin/com/example/demo/MessageControllerTest.kt b/webmvc-method-arg-resolver/src/test/kotlin/com/example/demo/MessageControllerTest.kt
new file mode 100644
index 0000000..e6c5c94
--- /dev/null
+++ b/webmvc-method-arg-resolver/src/test/kotlin/com/example/demo/MessageControllerTest.kt
@@ -0,0 +1,47 @@
+package com.example.demo
+
+import com.ninjasquad.springmockk.MockkBean
+import io.kotest.matchers.shouldBe
+import io.mockk.every
+import io.mockk.slot
+import io.mockk.verify
+import org.junit.jupiter.api.Test
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest
+import org.springframework.boot.test.context.TestConfiguration
+import org.springframework.context.annotation.Import
+import org.springframework.test.web.reactive.server.WebTestClient
+
+@WebFluxTest
+class MessageControllerTest {
+
+    @TestConfiguration
+    @Import(WebConfig::class)
+    inner class TestConfig
+
+    @Autowired
+    lateinit var client: WebTestClient
+
+    @MockkBean
+    lateinit var messageRepository: MessageRepository
+
+    @Test
+    fun `get all messages`() {
+        val slot = slot<Map<String, Boolean>>()
+        every { messageRepository.getAll(capture(slot)) } returns
+                listOf(
+                    Message(1, "Hello"),
+                    Message(2, "World")
+                )
+
+        client.get()
+            .uri("/messages?sort=id")
+            .exchange()
+            .expectStatus().isOk
+            .expectBodyList(Message::class.java).hasSize(2)
+
+        slot.captured shouldBe mapOf("id" to true)
+        verify(exactly = 1) { messageRepository.getAll(any()) }
+    }
+
+}
\ No newline at end of file