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Ramesh Fadatare
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spring boot + hibernate one - to - one mapping example
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‎springboot-jpa-one-to-one-example/.gitignore‎

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/target/
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!.mvn/wrapper/maven-wrapper.jar
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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### NetBeans ###
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/nbproject/private/
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/build/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/

‎springboot-jpa-one-to-one-example/.mvn/wrapper/maven-wrapper.jar‎

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‎springboot-jpa-one-to-one-example/.mvn/wrapper/maven-wrapper.properties‎

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distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.4/apache-maven-3.5.4-bin.zip

‎springboot-jpa-one-to-one-example/mvnw.cmd‎

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@REM ----------------------------------------------------------------------------
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@REM Licensed to the Apache Software Foundation (ASF) under one
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@REM or more contributor license agreements. See the NOTICE file
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@REM distributed with this work for additional information
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@REM regarding copyright ownership. The ASF licenses this file
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@REM to you under the Apache License, Version 2.0 (the
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@REM "License"); you may not use this file except in compliance
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@REM with the License. You may obtain a copy of the License at
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@REM
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@REM http://www.apache.org/licenses/LICENSE-2.0
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@REM
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@REM Unless required by applicable law or agreed to in writing,
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@REM software distributed under the License is distributed on an
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@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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@REM KIND, either express or implied. See the License for the
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@REM specific language governing permissions and limitations
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@REM under the License.
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@REM ----------------------------------------------------------------------------
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@REM ----------------------------------------------------------------------------
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@REM Maven2 Start Up Batch script
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@REM
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@REM Required ENV vars:
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@REM JAVA_HOME - location of a JDK home dir
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@REM
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@REM Optional ENV vars
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@REM M2_HOME - location of maven2's installed home dir
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@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
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@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending
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@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
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@REM e.g. to debug Maven itself, use
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@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
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@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
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@REM ----------------------------------------------------------------------------
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@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
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@echo off
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@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on'
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@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
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@REM set %HOME% to equivalent of $HOME
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if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
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@REM Execute a user defined script before this one
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if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
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@REM check for pre script, once with legacy .bat ending and once with .cmd ending
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if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
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if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
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:skipRcPre
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@setlocal
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set ERROR_CODE=0
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@REM To isolate internal variables from possible post scripts, we use another setlocal
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@setlocal
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@REM ==== START VALIDATION ====
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if not "%JAVA_HOME%" == "" goto OkJHome
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echo.
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echo Error: JAVA_HOME not found in your environment. >&2
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echo Please set the JAVA_HOME variable in your environment to match the >&2
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echo location of your Java installation. >&2
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echo.
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goto error
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:OkJHome
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if exist "%JAVA_HOME%\bin\java.exe" goto init
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echo.
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echo Error: JAVA_HOME is set to an invalid directory. >&2
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echo JAVA_HOME = "%JAVA_HOME%" >&2
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echo Please set the JAVA_HOME variable in your environment to match the >&2
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echo location of your Java installation. >&2
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echo.
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goto error
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@REM ==== END VALIDATION ====
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:init
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@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
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@REM Fallback to current working directory if not found.
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set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
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IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
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set EXEC_DIR=%CD%
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set WDIR=%EXEC_DIR%
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:findBaseDir
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IF EXIST "%WDIR%"\.mvn goto baseDirFound
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cd ..
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IF "%WDIR%"=="%CD%" goto baseDirNotFound
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set WDIR=%CD%
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goto findBaseDir
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:baseDirFound
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set MAVEN_PROJECTBASEDIR=%WDIR%
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cd "%EXEC_DIR%"
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goto endDetectBaseDir
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:baseDirNotFound
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set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
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cd "%EXEC_DIR%"
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:endDetectBaseDir
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IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
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@setlocal EnableExtensions EnableDelayedExpansion
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for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
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@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
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:endReadAdditionalConfig
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SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
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set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
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set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
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%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
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if ERRORLEVEL 1 goto error
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goto end
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:error
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set ERROR_CODE=1
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:end
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@endlocal & set ERROR_CODE=%ERROR_CODE%
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if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
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@REM check for post script, once with legacy .bat ending and once with .cmd ending
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if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
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if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
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:skipRcPost
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@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
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if "%MAVEN_BATCH_PAUSE%" == "on" pause
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if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
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exit /B %ERROR_CODE%

‎springboot-jpa-one-to-one-example/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>net.guides.springboot2</groupId>
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<artifactId>springboot-jpa-one-to-one-example</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.0.5.RELEASE</version>
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<relativePath /> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-jpa</artifactId>
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</dependency>
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<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎springboot-jpa-one-to-one-example/src/main/java/net/guides/springboot/jpa/Application.java‎

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package net.guides.springboot.jpa;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import net.guides.springboot.jpa.model.Instructor;
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import net.guides.springboot.jpa.model.InstructorDetail;
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import net.guides.springboot.jpa.repository.InstructorRepository;
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@SpringBootApplication
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public class Application implements CommandLineRunner {
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public static void main(String[] args) {
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SpringApplication.run(Application.class, args);
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}
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@Autowired
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private InstructorRepository instructorRepository;
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@Override
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public void run(String... args) throws Exception {
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Instructor instructor = new Instructor("Ramesh", "Fadatare", "[email protected]");
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InstructorDetail instructorDetail = new InstructorDetail("Java Guides", "Cricket Playing");
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// associate the objects
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instructor.setInstructorDetail(instructorDetail);
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instructorRepository.save(instructor);
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}
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}

‎springboot-jpa-one-to-one-example/src/main/java/net/guides/springboot/jpa/controller/InstructorController.java‎

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package net.guides.springboot.jpa.controller;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.validation.Valid;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.ResponseEntity;
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import org.springframework.web.bind.annotation.DeleteMapping;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.PutMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import net.guides.springboot.jpa.model.Instructor;
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import net.guides.springboot.jpa.repository.InstructorRepository;
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@RestController
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@RequestMapping("/api/v1")
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public class InstructorController {
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@Autowired
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private InstructorRepository instructorRepository;
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@GetMapping("/instructors")
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public List<Instructor> getInstructors() {
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return instructorRepository.findAll();
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}
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@GetMapping("/instructors/{id}")
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public ResponseEntity<Instructor> getInstructorById(
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@PathVariable(value = "id") Long instructorId) throws ResourceNotFoundException {
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Instructor user = instructorRepository.findById(instructorId)
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.orElseThrow(() -> new ResourceNotFoundException("Instructor not found :: " + instructorId));
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return ResponseEntity.ok().body(user);
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}
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@PostMapping("/instructors")
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public Instructor createUser(@Valid @RequestBody Instructor instructor) {
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return instructorRepository.save(instructor);
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}
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@PutMapping("/instructors/{id}")
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public ResponseEntity<Instructor> updateUser(
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@PathVariable(value = "id") Long instructorId,
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@Valid @RequestBody Instructor userDetails) throws ResourceNotFoundException {
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Instructor user = instructorRepository.findById(instructorId)
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.orElseThrow(() -> new ResourceNotFoundException("Instructor not found :: " + instructorId));
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user.setEmail(userDetails.getEmail());
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final Instructor updatedUser = instructorRepository.save(user);
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return ResponseEntity.ok(updatedUser);
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}
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@DeleteMapping("/instructors/{id}")
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public Map<String, Boolean> deleteUser(
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@PathVariable(value = "id") Long instructorId) throws ResourceNotFoundException {
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Instructor instructor = instructorRepository.findById(instructorId)
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.orElseThrow(() -> new ResourceNotFoundException("Instructor not found :: " + instructorId));
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instructorRepository.delete(instructor);
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Map<String, Boolean> response = new HashMap<>();
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response.put("deleted", Boolean.TRUE);
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return response;
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}
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}

‎springboot-jpa-one-to-one-example/src/main/java/net/guides/springboot/jpa/controller/ResourceNotFoundException.java‎

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package net.guides.springboot.jpa.controller;
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import org.springframework.http.HttpStatus;
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import org.springframework.web.bind.annotation.ResponseStatus;
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@ResponseStatus(value = HttpStatus.NOT_FOUND)
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public class ResourceNotFoundException extends Exception{
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private static final long serialVersionUID = 1L;
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public ResourceNotFoundException(String message){
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super(message);
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}
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}

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