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Add Lesson 22 code
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‎Lesson22.CRUD_App2/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" 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>ru.alishev.springcourse</groupId>
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<artifactId>spring-crud-app1</artifactId>
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<version>1.0-SNAPSHOT</version>
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<packaging>war</packaging>
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<name>spring-mvc-app1 Maven Webapp</name>
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<!-- FIXME change it to the project's website -->
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<url>http://www.example.com</url>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.7</maven.compiler.source>
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<maven.compiler.target>1.7</maven.compiler.target>
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<spring.version>5.2.1.RELEASE</spring.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-core</artifactId>
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<version>${spring.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-context</artifactId>
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<version>${spring.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-web</artifactId>
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<version>${spring.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-webmvc</artifactId>
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<version>${spring.version}</version>
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</dependency>
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<dependency>
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<groupId>org.thymeleaf</groupId>
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<artifactId>thymeleaf-spring5</artifactId>
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<version>3.0.11.RELEASE</version>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>4.0.1</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<finalName>spring-mvc-app1</finalName>
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<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
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<plugins>
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<plugin>
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<artifactId>maven-clean-plugin</artifactId>
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<version>3.1.0</version>
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</plugin>
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<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
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<plugin>
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<artifactId>maven-resources-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.0</version>
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</plugin>
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.22.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-war-plugin</artifactId>
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<version>3.2.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-install-plugin</artifactId>
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<version>2.5.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>2.8.2</version>
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</plugin>
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</plugins>
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</pluginManagement>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>8</source>
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<target>8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎Lesson22.CRUD_App2/src/main/java/ru/alishev/springcourse/config/MySpringMvcDispatcherSerlvetIntitializer.java‎

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package ru.alishev.springcourse.config;
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import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
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/**
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* @author Neil Alishev
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*/
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public class MySpringMvcDispatcherSerlvetIntitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
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@Override
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protected Class<?>[] getRootConfigClasses() {
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return null;
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}
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@Override
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protected Class<?>[] getServletConfigClasses() {
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return new Class[]{SpringConfig.class};
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}
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@Override
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protected String[] getServletMappings() {
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return new String[]{"/"};
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}
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}

‎Lesson22.CRUD_App2/src/main/java/ru/alishev/springcourse/config/SpringConfig.java‎

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package ru.alishev.springcourse.config;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.ApplicationContext;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.web.servlet.config.annotation.EnableWebMvc;
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import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
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import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
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import org.thymeleaf.spring5.SpringTemplateEngine;
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import org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver;
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import org.thymeleaf.spring5.view.ThymeleafViewResolver;
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/**
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* @author Neil Alishev
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*/
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@Configuration
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@ComponentScan("ru.alishev.springcourse")
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@EnableWebMvc
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public class SpringConfig implements WebMvcConfigurer {
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private final ApplicationContext applicationContext;
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@Autowired
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public SpringConfig(ApplicationContext applicationContext) {
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this.applicationContext = applicationContext;
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}
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@Bean
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public SpringResourceTemplateResolver templateResolver() {
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SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
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templateResolver.setApplicationContext(applicationContext);
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templateResolver.setPrefix("/WEB-INF/views/");
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templateResolver.setSuffix(".html");
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return templateResolver;
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}
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@Bean
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public SpringTemplateEngine templateEngine() {
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SpringTemplateEngine templateEngine = new SpringTemplateEngine();
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templateEngine.setTemplateResolver(templateResolver());
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templateEngine.setEnableSpringELCompiler(true);
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return templateEngine;
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}
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@Override
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public void configureViewResolvers(ViewResolverRegistry registry) {
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ThymeleafViewResolver resolver = new ThymeleafViewResolver();
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resolver.setTemplateEngine(templateEngine());
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registry.viewResolver(resolver);
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}
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}

‎Lesson22.CRUD_App2/src/main/java/ru/alishev/springcourse/controllers/PeopleController.java‎

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package ru.alishev.springcourse.controllers;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import org.springframework.ui.Model;
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import org.springframework.web.bind.annotation.*;
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import ru.alishev.springcourse.dao.PersonDAO;
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import ru.alishev.springcourse.models.Person;
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/**
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* @author Neil Alishev
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*/
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@Controller
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@RequestMapping("/people")
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public class PeopleController {
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private final PersonDAO personDAO;
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@Autowired
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public PeopleController(PersonDAO personDAO) {
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this.personDAO = personDAO;
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}
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@GetMapping()
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public String index(Model model) {
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model.addAttribute("people", personDAO.index());
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return "people/index";
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}
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@GetMapping("/{id}")
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public String show(@PathVariable("id") int id, Model model) {
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model.addAttribute("person", personDAO.show(id));
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return "people/show";
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}
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@GetMapping("/new")
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public String newPerson(@ModelAttribute("person") Person person) {
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return "people/new";
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}
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@PostMapping()
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public String create(@ModelAttribute("person") Person person) {
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personDAO.save(person);
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return "redirect:/people";
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}
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}

‎Lesson22.CRUD_App2/src/main/java/ru/alishev/springcourse/dao/PersonDAO.java‎

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package ru.alishev.springcourse.dao;
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import org.springframework.stereotype.Component;
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import ru.alishev.springcourse.models.Person;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author Neil Alishev
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*/
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@Component
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public class PersonDAO {
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private static int PEOPLE_COUNT;
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private List<Person> people;
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{
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people = new ArrayList<>();
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people.add(new Person(++PEOPLE_COUNT, "Tom"));
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people.add(new Person(++PEOPLE_COUNT, "Bob"));
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people.add(new Person(++PEOPLE_COUNT, "Mike"));
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people.add(new Person(++PEOPLE_COUNT, "Katy"));
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}
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public List<Person> index() {
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return people;
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}
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public Person show(int id) {
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return people.stream().filter(person -> person.getId() == id).findAny().orElse(null);
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}
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public void save(Person person) {
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person.setId(++PEOPLE_COUNT);
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people.add(person);
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}
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}

‎Lesson22.CRUD_App2/src/main/java/ru/alishev/springcourse/models/Person.java‎

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package ru.alishev.springcourse.models;
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/**
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* @author Neil Alishev
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*/
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public class Person {
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private int id;
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private String name;
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public Person() {
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}
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public Person(int id, String name) {
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this.id = id;
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this.name = name;
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}
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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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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}

‎Lesson22.CRUD_App2/src/main/webapp/WEB-INF/views/people/index.html‎

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<!DOCTYPE html>
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<html lang="en" xmlns:th="http://thymeleaf.org">
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<head>
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<meta charset="UTF-8">
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<title>Index</title>
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</head>
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<body>
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<div th:each="person : ${people}">
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<a th:href="@{/people/{id}(id=${person.getId()})}" th:text="${person.getName()}">user</a>
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</div>
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</body>
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</html>

‎Lesson22.CRUD_App2/src/main/webapp/WEB-INF/views/people/new.html‎

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<!DOCTYPE html>
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<html lang="en" xmlns:th="http://thymeleaf.org">
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<head>
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<meta charset="UTF-8">
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<title>New person</title>
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</head>
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<body>
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<form th:method="POST" th:action="@{/people}" th:object="${person}">
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<label for="name">Enter name: </label>
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<input type="text" th:field="*{name}" id="name"/>
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<br/>
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<input type="submit" value="Create!"/>
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</form>
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</body>
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</html>

‎Lesson22.CRUD_App2/src/main/webapp/WEB-INF/views/people/show.html‎

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<!DOCTYPE html>
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<html lang="en" xmlns:th="http://thymeleaf.org">
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<head>
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<meta charset="UTF-8">
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<title>Show</title>
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</head>
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<body>
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<p th:text="${person.getName()}">VALUE</p>
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<p th:text="${person.getId()}">VALUE</p>
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</body>
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</html>

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