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frankyoh
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added modelmapper example
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‎pom.xml‎

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<!--<module>springboot-security-junit-test-withmockuser</module>-->
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<module>springboot-security</module>
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<module>springboot-data-jpa-h2</module>
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<!--? <module>springboot-modelmapper</module>-->
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<module>springboot-modelmapper</module>
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<module>springboot-resttemplate</module>
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<module>springboot-quartz-cluster</module>
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<module>springboot-quartz-reactjs-angularjs</module>

‎springboot-modelmapper/.gitignore‎

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HELP.md
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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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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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/build/

‎springboot-modelmapper/README.md‎

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Module for the articles that are part of the Spring REST E-book:
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1. [Bootstrap a Web Application with Spring 5](https://www.baeldung.com/bootstraping-a-web-application-with-spring-and-java-based-configuration)
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2. [Build a REST API with Spring and Java Config](http://www.baeldung.com/building-a-restful-web-service-with-spring-and-java-based-configuration)
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3. [Http Message Converters with the Spring Framework](http://www.baeldung.com/spring-httpmessageconverter-rest)
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4. [Spring’s RequestBody and ResponseBody Annotations](https://www.baeldung.com/spring-request-response-body)
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5. [Entity To DTO Conversion for a Spring REST API](https://www.baeldung.com/entity-to-and-from-dto-for-a-java-spring-application)
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6. [Error Handling for REST with Spring](http://www.baeldung.com/exception-handling-for-rest-with-spring)
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7. [REST API Discoverability and HATEOAS](http://www.baeldung.com/restful-web-service-discoverability)
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8. [An Intro to Spring HATEOAS](http://www.baeldung.com/spring-hateoas-tutorial)
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9. [REST Pagination in Spring](http://www.baeldung.com/rest-api-pagination-in-spring)
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10. [Test a REST API with Java](http://www.baeldung.com/integration-testing-a-rest-api)
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- [HATEOAS for a Spring REST Service](http://www.baeldung.com/rest-api-discoverability-with-spring)
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- [Versioning a REST API](http://www.baeldung.com/rest-versioning)
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- [ETags for REST with Spring](http://www.baeldung.com/etags-for-rest-with-spring)
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- [Testing REST with multiple MIME types](http://www.baeldung.com/testing-rest-api-with-multiple-media-types)
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- [Testing Web APIs with Postman Collections](https://www.baeldung.com/postman-testing-collections)
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- [Spring Boot Consuming and Producing JSON](https://www.baeldung.com/spring-boot-json)

‎springboot-modelmapper/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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<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>2.1.3.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.advenoh</groupId>
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<artifactId>springboot-modelmapper</artifactId>
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<name>springboot-modelmapper</name>
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<description>Spring Boot ModelMapper</description>
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<!-- <packaging>war</packaging>-->
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<properties>
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<java.version>1.8</java.version>
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<guava.version>27.0.1-jre</guava.version>
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<xstream.version>1.4.11.1</xstream.version>
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<modelmapper.version>2.3.3</modelmapper.version>
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<rest-assured.version>3.0.1</rest-assured.version>
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<junit-jupiter.version>5.2.0</junit-jupiter.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>com.fasterxml.jackson.dataformat</groupId>
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<artifactId>jackson-dataformat-xml</artifactId>
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</dependency>
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<!-- We'll need to comment out the jackson-dataformat-xml dependency if we want to use XStream: -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-oxm</artifactId>
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</dependency>
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<dependency>
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<groupId>com.thoughtworks.xstream</groupId>
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<artifactId>xstream</artifactId>
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<version>${xstream.version}</version>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>1.18.4</version>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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<version>1.2.3</version>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</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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<!-- Spring HATEOAS -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-hateoas</artifactId>
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</dependency>
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<!-- util -->
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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<version>${guava.version}</version>
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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-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>net.sourceforge.htmlunit</groupId>
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<artifactId>htmlunit</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.modelmapper</groupId>
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<artifactId>modelmapper</artifactId>
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<version>${modelmapper.version}</version>
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</dependency>
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<!-- test scoped -->
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<dependency>
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<groupId>io.rest-assured</groupId>
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<artifactId>rest-assured</artifactId>
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<version>${rest-assured.version}</version>
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<scope>test</scope>
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<!-- <exclusions>-->
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<!-- <exclusion>-->
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<!-- <artifactId>commons-logging</artifactId>-->
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<!-- <groupId>commons-logging</groupId>i-->
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<!-- </exclusion>-->
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<!-- </exclusions>-->
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>${junit-jupiter.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-params</artifactId>
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<version>${junit-jupiter.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-api</artifactId>
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<version>${junit-jupiter.version}</version>
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<scope>test</scope>
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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-modelmapper/src/main/java/com/baeldung/SpringBootRestApplication.java‎

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package com.baeldung;
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import org.modelmapper.ModelMapper;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.Bean;
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@SpringBootApplication
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public class SpringBootRestApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringBootRestApplication.class, args);
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}
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@Bean
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public ModelMapper modelMapper() {
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return new ModelMapper();
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}
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}

‎springboot-modelmapper/src/main/java/com/baeldung/modelmapper/controller/PostRestController.java‎

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package com.baeldung.modelmapper.controller;
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import java.text.ParseException;
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import java.util.List;
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import java.util.stream.Collectors;
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import org.modelmapper.ModelMapper;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.HttpStatus;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.PathVariable;
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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.RequestMethod;
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import org.springframework.web.bind.annotation.ResponseBody;
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import org.springframework.web.bind.annotation.ResponseStatus;
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import com.baeldung.modelmapper.dto.PostDto;
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import com.baeldung.modelmapper.model.Post;
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import com.baeldung.modelmapper.service.IPostService;
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import com.baeldung.modelmapper.service.IUserService;
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@Controller
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@RequestMapping("/posts")
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public class PostRestController {
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@Autowired
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private IPostService postService;
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@Autowired
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private IUserService userService;
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@Autowired
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private ModelMapper modelMapper;
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@RequestMapping(method = RequestMethod.GET)
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@ResponseBody
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public List<PostDto> getPosts(
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@PathVariable("page") int page,
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@PathVariable("size") int size,
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@PathVariable("sortDir") String sortDir,
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@PathVariable("sort") String sort) {
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List<Post> posts = postService.getPostsList(page, size, sortDir, sort);
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return posts.stream()
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.map(post -> convertToDto(post))
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.collect(Collectors.toList());
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}
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@RequestMapping(method = RequestMethod.POST)
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@ResponseStatus(HttpStatus.CREATED)
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@ResponseBody
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public PostDto createPost(@RequestBody PostDto postDto) throws ParseException {
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Post post = convertToEntity(postDto);
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Post postCreated = postService.createPost(post);
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return convertToDto(postCreated);
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}
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@RequestMapping(value = "/{id}", method = RequestMethod.GET)
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@ResponseBody
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public PostDto getPost(@PathVariable("id") Long id) {
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return convertToDto(postService.getPostById(id));
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}
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@RequestMapping(value = "/{id}", method = RequestMethod.PUT)
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@ResponseStatus(HttpStatus.OK)
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public void updatePost(@RequestBody PostDto postDto) throws ParseException {
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Post post = convertToEntity(postDto);
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postService.updatePost(post);
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}
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private PostDto convertToDto(Post post) {
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PostDto postDto = modelMapper.map(post, PostDto.class);
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postDto.setSubmissionDate(post.getSubmissionDate(),
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userService.getCurrentUser().getPreference().getTimezone());
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return postDto;
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}
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private Post convertToEntity(PostDto postDto) throws ParseException {
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Post post = modelMapper.map(postDto, Post.class);
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post.setSubmissionDate(postDto.getSubmissionDateConverted(
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userService.getCurrentUser().getPreference().getTimezone()));
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if (postDto.getId() != null) {
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Post oldPost = postService.getPostById(postDto.getId());
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post.setRedditID(oldPost.getRedditID());
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post.setSent(oldPost.isSent());
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}
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return post;
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}
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}

‎springboot-modelmapper/src/main/java/com/baeldung/modelmapper/dto/PostDto.java‎

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package com.baeldung.modelmapper.dto;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.TimeZone;
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public class PostDto {
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private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
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private Long id;
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private String title;
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private String url;
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private String date;
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private UserDto user;
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public Date getSubmissionDateConverted(String timezone) throws ParseException {
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dateFormat.setTimeZone(TimeZone.getTimeZone(timezone));
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return dateFormat.parse(this.date);
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}
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public void setSubmissionDate(Date date, String timezone) {
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dateFormat.setTimeZone(TimeZone.getTimeZone(timezone));
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this.date = dateFormat.format(date);
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}
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getTitle() {
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return title;
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}
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public void setTitle(String title) {
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this.title = title;
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}
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public String getUrl() {
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return url;
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}
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public void setUrl(String url) {
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this.url = url;
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}
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public String getDate() {
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return date;
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}
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public void setDate(String date) {
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this.date = date;
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}
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public UserDto getUser() {
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return user;
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}
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public void setUser(UserDto user) {
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this.user = user;
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}
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}

‎springboot-modelmapper/src/main/java/com/baeldung/modelmapper/dto/UserDto.java‎

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package com.baeldung.modelmapper.dto;
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public class UserDto {
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private String name;
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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}

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