들어가기 전에

이번 시간엔 방명록을 Spring 프레임워크를 이용해 만들어 보도록 하겠습니다.

이를 통해 각 레이어별로 어떤 내용들을 작성해야 하는지 알아보고, 완전히 동작하는 웹 어플리케이션을 개발해 봄으로써 Spring 웹 어플리케이션에 대한 이해를 높이는 시간이 될 수 있길 바랍니다.

학습 목표

1. Spring 프레임워크를 이용한 웹 어플리케이션 프로젝트를 구성할 수 있습니다.
   
2. Spring 프레임워크를 이용한 웹 어플리케이션 개발 시 어떤 요소들을 개발해야하는지 이해합니다.

핵심 개념

• @Controller
• @Service
• @Repository
• @Transactional

학습하기

실습코드

WebMvcContextConfiguration.java

package kr.or.connect.guestbook.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "kr.or.connect.guestbook.controller" })
public class WebMvcContextConfiguration extends WebMvcConfigurerAdapter{

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/css/**").addResourceLocations("/css/").setCachePeriod(31556926);
        registry.addResourceHandler("/img/**").addResourceLocations("/img/").setCachePeriod(31556926);
        registry.addResourceHandler("/js/**").addResourceLocations("/js/").setCachePeriod(31556926);
    }
 
    // default servlet handler를 사용하게 합니다.
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
   
    @Override
    public void addViewControllers(final ViewControllerRegistry registry) {
    		System.out.println("addViewControllers가 호출됩니다. ");
        registry.addViewController("/").setViewName("index");
    }
    
    @Bean
    public InternalResourceViewResolver getInternalResourceViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }
}

DBConfig.java

package kr.or.connect.guestbook.config;

import javax.sql.DataSource;

import org.apache.commons.dbcp2.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;

@Configuration
@EnableTransactionManagement
public class DBConfig implements TransactionManagementConfigurer {
	private String driverClassName = "com.mysql.jdbc.Driver";

	private String url = "jdbc:mysql://localhost:3306/connectdb?useUnicode=true&characterEncoding=utf8";

	private String username = "connectuser";

	private String password = "connect123!@#";

	@Bean
	public DataSource dataSource() {
		BasicDataSource dataSource = new BasicDataSource();
		dataSource.setDriverClassName(driverClassName);
		dataSource.setUrl(url);
		dataSource.setUsername(username);
		dataSource.setPassword(password);
		return dataSource;
	}

	@Override
	public PlatformTransactionManager annotationDrivenTransactionManager() {
		return transactionManger();
	}

	@Bean
	public PlatformTransactionManager transactionManger() {
		return new DataSourceTransactionManager(dataSource());
	}
}

ApplicationConfig.java

package kr.or.connect.guestbook.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

@Configuration
@ComponentScan(basePackages = { "kr.or.connect.guestbook.dao",  "kr.or.connect.guestbook.service"})
@Import({ DBConfig.class })
public class ApplicationConfig {

}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app>

	<display-name>Spring JavaConfig Sample</display-name>
	<context-param>
		<param-name>contextClass</param-name>
		<param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext
		</param-value>
	</context-param>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>kr.or.connect.guestbook.config.ApplicationConfig
		</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>

	<servlet>
		<servlet-name>mvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
		<init-param>
			<param-name>contextClass</param-name>
			<param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext
			</param-value>
		</init-param>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>kr.or.connect.guestbook.config.WebMvcContextConfiguration
			</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>mvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>

	<filter>
		<filter-name>encodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter
		</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<% 
	response.sendRedirect("list");
%>

참고 자료