diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..b63da4551
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,42 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 000000000..c79ce29c7
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,10 @@
+# 디폴트 무시된 파일
+/shelf/
+/workspace.xml
+# 에디터 기반 HTTP 클라이언트 요청
+/httpRequests/
+# 환경에 따라 달라지는 Maven 홈 디렉터리
+/mavenHomeManager.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
new file mode 100644
index 000000000..43cc8e4e9
--- /dev/null
+++ b/.idea/gradle.xml
@@ -0,0 +1,17 @@
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 000000000..f6589e383
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,10 @@
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 000000000..35eb1ddfb
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 000000000..2e9651f83
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# 5-sprint-mission
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 000000000..668101a29
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,19 @@
+plugins {
+ id 'java'
+}
+
+group = 'com.sprint.mission'
+version = '1.0-SNAPSHOT'
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ testImplementation platform('org.junit:junit-bom:5.10.0')
+ testImplementation 'org.junit.jupiter:junit-jupiter'
+}
+
+test {
+ useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 000000000..249e5832f
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 000000000..4b9298151
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Fri Jul 11 16:45:04 KST 2025
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 000000000..1b6c78733
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,234 @@
+#!/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.
+#
+
+##############################################################################
+#
+# 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/master/subprojects/plugins/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
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+ echo "$*"
+} >&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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD=java
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+ case $MAX_FD in #(
+ max*)
+ MAX_FD=$( ulimit -H -n ) ||
+ warn "Could not query maximum file descriptor limit"
+ esac
+ case $MAX_FD in #(
+ '' | soft) :;; #(
+ *)
+ ulimit -n "$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
+
+# Collect all arguments for the java command;
+# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+# shell script including quotes and variable substitutions, so put them in
+# double quotes to make sure that they get re-expanded; and
+# * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+ "-Dorg.gradle.appname=$APP_BASE_NAME" \
+ -classpath "$CLASSPATH" \
+ org.gradle.wrapper.GradleWrapperMain \
+ "$@"
+
+# 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/gradlew.bat b/gradlew.bat
new file mode 100644
index 000000000..107acd32c
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@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 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%" == "0" goto execute
+
+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 execute
+
+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
+
+: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%"=="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 000000000..8cc6db1f0
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = '5-sprint-mission'
\ No newline at end of file
diff --git a/src/main/java/com/sprint/mission/discodeit/Run.java b/src/main/java/com/sprint/mission/discodeit/Run.java
new file mode 100644
index 000000000..2d0697d14
--- /dev/null
+++ b/src/main/java/com/sprint/mission/discodeit/Run.java
@@ -0,0 +1,63 @@
+package com.sprint.mission.discodeit;
+
+import com.sprint.mission.discodeit.entity.User;
+import com.sprint.mission.discodeit.service.IUserService;
+import com.sprint.mission.discodeit.service.jcf.JCFUserServiceImpl;
+
+import java.util.List;
+
+public class Run {
+ public static void main(String[] args) {
+// IUserService userService = new JCFUserServiceImpl();
+ JCFUserServiceImpl jcfUserService = new JCFUserServiceImpl();
+// userTest(userService);
+ userTest(jcfUserService);
+ }
+
+//[ ] 등록
+//[ ] 조회(단건, 다건)
+//[ ] 수정
+//[ ] 수정된 데이터 조회
+//[ ] 삭제
+//[ ] 조회를 통해 삭제되었는지 확인
+ public static void userTest(JCFUserServiceImpl userService) {
+ // [] 등록
+ userService.createUser("홍길동", "111", "email1");
+ userService.createUser("김길동", "111", "email2");
+ userService.createUser("3길동", "222", "email2");
+ userService.createUser("1길동", "333", "email2");
+ User user1 = userService.getUserData().get(0);
+
+ System.out.println("userService.getUserData().size() : " + userService.getUserData().size());
+ System.out.println("userData => " + userService.getUserData() );
+ System.out.println("---------------");
+
+ //[] 단건 조회
+ User findUser = userService.findById(user1.getId());
+ System.out.println("[단건 조회] findId : " + findUser);
+ System.out.println("-----------------------------");
+
+ //[] 다건 조회
+ List findAllUser = userService.findAll("김길동");
+ System.out.println("[다건 조회]findAll() => " + findAllUser);
+ System.out.println("----------------");
+
+ //[] 데이터 수정
+ userService.update(user1.getId(),"username","홍길동","장길동");
+ System.out.println("username 수정 : " + userService.getUserData());
+ System.out.println("--------------");
+ userService.update(user1.getId(), "password", "111","444");
+ System.out.println("password 수정 : " + userService.getUserData());
+ System.out.println("--------------");
+
+ System.out.println("user 데이터 삭제(전) : " + userService.getUserData().size());
+ System.out.println("------------------");
+ userService.delete(user1.getId());
+ System.out.println("user 데이터 삭제(후) : " + userService.getUserData().size());
+ System.out.println("------------------");
+ System.out.println("조회를 통해 삭제되었는지 확인");
+ System.out.println(userService.getUserData());
+
+ }
+
+}
diff --git a/src/main/java/com/sprint/mission/discodeit/entity/Channel.java b/src/main/java/com/sprint/mission/discodeit/entity/Channel.java
new file mode 100644
index 000000000..f8b8248d5
--- /dev/null
+++ b/src/main/java/com/sprint/mission/discodeit/entity/Channel.java
@@ -0,0 +1,31 @@
+package com.sprint.mission.discodeit.entity;
+
+import java.util.UUID;
+
+public class Channel {
+ private UUID id;
+ private Long createAt;
+ private Long updateAt;
+
+ //내가 디스코드에서 필요한 필드를 추가적으로 설계하는 자리
+ private String name;
+ //추가적인 정보들
+
+ //권한, 이메일, 이후 필요한 정보를 더 선언해도 된다
+
+ public Channel(UUID id) {
+ this.id = UUID.randomUUID();
+ }
+
+ public UUID getId() {
+ return id;
+ }
+
+ public void setId(UUID id) {
+ this.id = id;
+ }
+
+// public static void main(String[] args) {
+// System.out.println("Hello World");
+// }
+}
diff --git a/src/main/java/com/sprint/mission/discodeit/entity/Message.java b/src/main/java/com/sprint/mission/discodeit/entity/Message.java
new file mode 100644
index 000000000..b5847e62f
--- /dev/null
+++ b/src/main/java/com/sprint/mission/discodeit/entity/Message.java
@@ -0,0 +1,34 @@
+package com.sprint.mission.discodeit.entity;
+
+import java.util.UUID;
+
+public class Message {
+ private UUID id;
+ private Long createAt;
+ private Long updateAt;
+
+ //내가 디스코드에서 필요한 필드를 추가적으로 설계하는 자리
+ private String content;
+ private UUID channelId;
+ private UUID authorId;
+
+ //추가적인 정보들, 공지, ... 창의적으로 생각해서
+
+ //권한, 이메일, 이후 필요한 정보를 더 선언해도 된다
+
+ public Message(UUID id) {
+ this.id = UUID.randomUUID();
+ }
+
+ public UUID getId() {
+ return id;
+ }
+
+ public void setId(UUID id) {
+ this.id = id;
+ }
+
+// public static void main(String[] args) {
+// System.out.println("Hello World");
+// }
+}
diff --git a/src/main/java/com/sprint/mission/discodeit/entity/User.java b/src/main/java/com/sprint/mission/discodeit/entity/User.java
new file mode 100644
index 000000000..a242cb599
--- /dev/null
+++ b/src/main/java/com/sprint/mission/discodeit/entity/User.java
@@ -0,0 +1,96 @@
+package com.sprint.mission.discodeit.entity;
+
+import java.util.UUID;
+
+public class User {
+ private UUID id;
+ private Long createAt;
+ private Long updateAt;
+
+ //내가 디스코드에서 필요한 필드를 추가적으로 설계하는 자리
+ private String username;
+ private String password;
+ private String email;
+
+ public void setCreateAt(Long createAt) {
+ this.createAt = createAt;
+ }
+
+ public void setUpdateAt(Long updateAt) {
+ this.updateAt = updateAt;
+ }
+
+ public void setUsername(String username) {
+ this.username = username;
+ }
+
+ public void setPassword(String password) {
+ this.password = password;
+ }
+
+ public void setEmail(String email) {
+ this.email = email;
+ }
+
+ public User(String username, String password) {
+ id = UUID.randomUUID();
+ this.username = username;
+ this.password = password;
+ createAt = System.currentTimeMillis();
+ }
+
+ public User(String username, String password, String email) {
+ id = UUID.randomUUID();
+ this.username = username;
+ this.password = password;
+ createAt = System.currentTimeMillis();
+ }
+
+
+ @Override
+ public String toString() {
+ final StringBuffer sb = new StringBuffer("User{");
+ sb.append("id=").append(id);
+ sb.append(", createAt=").append(createAt);
+ sb.append(", updateAt=").append(updateAt);
+ sb.append(", username='").append(username).append('\'');
+ sb.append(", password='").append(password).append('\'');
+ sb.append(", email='").append(email).append('\'');
+ sb.append('}');
+ return sb.toString();
+ }
+
+ public Long getCreateAt() {
+ return createAt;
+ }
+
+ public Long getUpdateAt() {
+ return updateAt;
+ }
+
+ public String getUsername() {
+ return username;
+ }
+
+ public String getPassword() {
+ return password;
+ }
+
+ public String getEmail() {
+ return email;
+ }
+//권한, 이메일, 이후 필요한 정보를 더 선언해도 된다
+
+ public User(UUID id) {
+ this.id = UUID.randomUUID();
+ }
+
+ public UUID getId() {
+ return id;
+ }
+
+ public void setId(UUID id) {
+ this.id = id;
+ }
+
+}
diff --git a/src/main/java/com/sprint/mission/discodeit/service/IUserService.java b/src/main/java/com/sprint/mission/discodeit/service/IUserService.java
new file mode 100644
index 000000000..46081f619
--- /dev/null
+++ b/src/main/java/com/sprint/mission/discodeit/service/IUserService.java
@@ -0,0 +1,14 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.entity.User;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface IUserService {
+ User createUser(String usernmae, String passowrd, String email);
+ User findById(UUID userId);
+ List findAll(String searchStr);
+ List update(UUID userId, String chgColumnType, String username, String password);
+ List delete(UUID userId);
+}
diff --git a/src/main/java/com/sprint/mission/discodeit/service/jcf/JCFUserServiceImpl.java b/src/main/java/com/sprint/mission/discodeit/service/jcf/JCFUserServiceImpl.java
new file mode 100644
index 000000000..2bda0a212
--- /dev/null
+++ b/src/main/java/com/sprint/mission/discodeit/service/jcf/JCFUserServiceImpl.java
@@ -0,0 +1,108 @@
+package com.sprint.mission.discodeit.service.jcf;
+
+import com.sprint.mission.discodeit.entity.User;
+import com.sprint.mission.discodeit.service.IUserService;
+
+import java.util.*;
+
+public class JCFUserServiceImpl implements IUserService {
+
+ public List getUserData() {
+ return userData;
+ }
+
+ public Map getUserMap() {
+ return userMap;
+ }
+
+ final List userData = new ArrayList<>();
+ final Map userMap = new HashMap<>();
+
+ @Override
+ public User createUser(String username, String password, String email) {
+ boolean blnError = false;
+ if( username == null || password == null || email == null ) {blnError = true;}
+ if( username.isEmpty() || password.isEmpty() || email.isEmpty() ) {blnError = true;}
+ if( username.isBlank() || password.isBlank() || email.isBlank() ) {blnError = true;}
+ if( blnError ) {
+ System.out.println("Username or Password or Email is blank");
+ throw new IllegalArgumentException();
+ }
+ User user = new User(username, password, email);
+ userData.add(user);
+ userMap.put(user.getId(), user);
+
+ return user;
+ }
+
+ @Override
+ public User findById(UUID userId) {
+ User rtnUser = null;
+ exitFor:
+ for (User user : userData) {
+ if( user.getId().equals(userId) ){
+ rtnUser = user;
+ break exitFor;
+ }
+ }
+ return rtnUser;
+ }
+
+ @Override
+ public List findAll(String searchStr) {
+ List rtnUserList = new ArrayList<>();
+ exitFor:
+ for (User user : userData) {
+ if( user.getUsername().equals(searchStr) ){
+ rtnUserList.add(user);
+ }
+ }
+ return rtnUserList;
+ }
+
+ @Override
+ public List update(UUID userId, String chgColumnType, String orgStr, String chgStr) {
+ for(User user : userData){
+ if( !user.getId().equals(userId) ) {
+ continue;
+ }
+
+ if( "username".equals(chgColumnType) ){
+ if( user.getUsername().equals(orgStr) ){
+ System.out.println(orgStr + "을 " + chgStr + "로 변경합니다.");
+ user.setUsername(chgStr);
+ }
+ }else if( "password".equals(chgColumnType) ){
+ if( user.getPassword().equals(orgStr) ){
+ user.setPassword(chgStr);
+ }
+ }
+ }
+ return userData;
+ }
+
+ @Override
+ public List delete(UUID userId) {
+ StringBuffer sbf = new StringBuffer();
+ try {
+ int idx = 0;
+ exitFor:
+ for (User user : userData) {
+ sbf.append("user.getId() : ").append(user.getId()).append(":");
+ sbf.append("userId : ").append(userId).append("\r\n");
+ System.out.println(sbf.toString());
+ if ( user.getId().equals(userId) ) {
+ System.out.println("삭제된 index 는 " + idx + "입니다.");
+ System.out.println("삭제된 userId 는 " + userId + "입니다.");
+ userData.remove(idx);
+ break exitFor;
+ }
+ sbf.setLength(0);
+ idx++;
+ }
+ }catch (Exception e){
+ e.printStackTrace();
+ }
+ return userData;
+ }
+}