Spring

IoC, 아파치 톰캣, 정적페이지 동적페이지

Mar 14, 2024
IoC, 아파치 톰캣, 정적페이지 동적페이지
 

새 프로젝트 만들기

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IoC Inversion of Controller 제어의 역전

일반적으로는 제어 흐름을 개발자가 컨트롤하지만 프레임워크에서 스프링이 자료를 관리하는 것
개발자는 @만 붙임
스프링에서 IOC를 수행하는 컴포넌트를 IOC container Spring container 라 부른다.
 
package com.example.demo.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    public HelloController() {
        System.out.println("Hellocontroller 컴포넌트 스캔됨");
    }

    @GetMapping("/home")
    public void home() {
        System.out.println("home 호출됨");
    }

}
 
D:\tools\jdk-21.0.1\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\lib\idea_rt.jar=51464:C:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath D:\workspace\spring_lec\demo\build\classes\java\main;D:\workspace\spring_lec\demo\build\resources\main;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.projectlombok\lombok\1.18.30\f195ee86e6c896ea47a1d39defbe20eb59cd149d\lombok-1.18.30.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-data-jpa\3.2.2\65cf3aad09f0218b7dfab849c9b0350d0a9e0d81\spring-boot-starter-data-jpa-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-mustache\3.2.2\1a38859051a3b9631eda4c2f9eb4d14ee85d1845\spring-boot-starter-mustache-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-web\3.2.2\b89d213d9f49c3e6247b2503ac7d94b0ac8260f6\spring-boot-starter-web-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-aop\3.2.2\f01ecef0ce5f8d5631890a0c456a88a72323b569\spring-boot-starter-aop-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-jdbc\3.2.2\22ffda6938dca5f584c8b1b64e4e9096e8302c1e\spring-boot-starter-jdbc-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.hibernate.orm\hibernate-core\6.4.1.Final\3dcefddf6609e6491d37208bcc0cab1273598cbd\hibernate-core-6.4.1.Final.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.data\spring-data-jpa\3.2.2\f91a3896c2a6139ac1da1fd8ff4350ca4b0e409e\spring-data-jpa-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-aspects\6.1.3\c8b5dde3568dc5df6109916d8ad4866efe4e61fd\spring-aspects-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter\3.2.2\dc04714f9295297f92fa8099eb51edc54dbe67db\spring-boot-starter-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\com.samskivert\jmustache\1.15\7b3b15951d13b774c76db2f4e14d977952f8b4d8\jmustache-1.15.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-json\3.2.2\328f5ce9e10d5f90520e72a3ff8a2586b9e46b37\spring-boot-starter-json-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-tomcat\3.2.2\e22a0ba37910731b382f3fe47ad36aed20fad24d\spring-boot-starter-tomcat-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-webmvc\6.1.3\f4738a57787add6567e0679eebb1b499a11019cc\spring-webmvc-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-web\6.1.3\cc3459b4abd436331608ddb6424886875f7086ab\spring-web-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-aop\6.1.3\4d9bd4bd9b8bedf9ef151b45c79766b336117b9a\spring-aop-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.aspectj\aspectjweaver\1.9.21\beaabaea95c7f3330f415c72ee0ffe79b51d172f\aspectjweaver-1.9.21.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\com.zaxxer\HikariCP\5.0.1\a74c7f0a37046846e88d54f7cb6ea6d565c65f9c\HikariCP-5.0.1.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-jdbc\6.1.3\be4b30cc956b26f13e04ccadc2b0575038c531bb\spring-jdbc-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\jakarta.persistence\jakarta.persistence-api\3.1.0\66901fa1c373c6aff65c13791cc11da72060a8d6\jakarta.persistence-api-3.1.0.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\jakarta.transaction\jakarta.transaction-api\2.0.1\51a520e3fae406abb84e2e1148e6746ce3f80a1a\jakarta.transaction-api-2.0.1.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-context\6.1.3\c63f038933701058fd7578460c66dbe2d424915\spring-context-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-orm\6.1.3\98572e26c6d011c9710545085358a4e35e27649\spring-orm-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.data\spring-data-commons\3.2.2\9b0b0f5f5bc793463a81171d6889809abc14b19b\spring-data-commons-3.2.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-tx\6.1.3\7750337bf46a2ff248685915c7cc88d3bef2f666\spring-tx-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-beans\6.1.3\c2df4210e796d3a27efc1f22621aa4e2c6cd985f\spring-beans-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework\spring-core\6.1.3\a002e96e780954cc3ac4cd70fd3bb16accdc47ed\spring-core-6.1.3.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.antlr\antlr4-runtime\4.13.0\5a02e48521624faaf5ff4d99afc88b01686af655\antlr4-runtime-4.13.0.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\jakarta.annotation\jakarta.annotation-api\2.1.1\48b9bda22b091b1f48b13af03fe36db3be6e1ae3\jakarta.annotation-api-2.1.1.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.slf4j\slf4j-api\2.0.11\ad96c3f8cf895e696dd35c2bc8e8ebe710be9e6d\slf4j-api-2.0.11.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-autoconfigure\3.2.2\5c407409f8d260a4bc6e173d16fc3b36e6adec21\spring-boot-au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nject\jakarta.inject-api\2.0.1\4c28afe1991a941d7702fe1362c365f0a8641d1e\jakarta.inject-api-2.0.1.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.glassfish.jaxb\jaxb-core\4.0.4\2d5aadd02af86f1e9d8c6f7e8501673f915d4e25\jaxb-core-4.0.4.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\jakarta.activation\jakarta.activation-api\2.1.2\640c0d5aff45dbff1e1a1bc09673ff3a02b1ba12\jakarta.activation-api-2.1.2.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.eclipse.angus\angus-activation\2.0.1\eaafaf4eb71b400e4136fc3a286f50e34a68ecb7\angus-activation-2.0.1.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\org.glassfish.jaxb\txw2\4.0.4\cfd2bcf08782673ac370694fdf2cf76dbaa607ef\txw2-4.0.4.jar;C:\Users\G\.gradle\caches\modules-2\files-2.1\com.sun.istack\istack-commons-runtime\4.1.2\18ec117c85f3ba0ac65409136afa8e42bc74e739\istack-commons-runtime-4.1.2.jar com.example.demo.DemoApplication

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.2.2)

2024-01-24T10:28:00.154+09:00  INFO 1160 --- [  restartedMain] com.example.demo.DemoApplication         : Starting DemoApplication using Java 21.0.1 with PID 1160 (D:\workspace\spring_lec\demo\build\classes\java\main started by G in D:\workspace\spring_lec\demo)
2024-01-24T10:28:00.155+09:00  INFO 1160 --- [  restartedMain] com.example.demo.DemoApplication         : No active profile set, falling back to 1 default profile: "default"
2024-01-24T10:28:00.184+09:00  INFO 1160 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2024-01-24T10:28:00.184+09:00  INFO 1160 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2024-01-24T10:28:00.491+09:00  INFO 1160 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2024-01-24T10:28:00.500+09:00  INFO 1160 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 5 ms. Found 0 JPA repository interfaces.
2024-01-24T10:28:00.760+09:00  INFO 1160 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8080 (http)
2024-01-24T10:28:00.766+09:00  INFO 1160 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2024-01-24T10:28:00.767+09:00  INFO 1160 --- [  restartedMain] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.18]
2024-01-24T10:28:00.794+09:00  INFO 1160 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2024-01-24T10:28:00.794+09:00  INFO 1160 --- [  restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 609 ms
2024-01-24T10:28:00.809+09:00  INFO 1160 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2024-01-24T10:28:00.906+09:00  INFO 1160 --- [  restartedMain] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection conn0: url=jdbc:h2:mem:136f1fe4-463c-4bed-a903-ad32e0f4ce90 user=SA
2024-01-24T10:28:00.907+09:00  INFO 1160 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2024-01-24T10:28:00.912+09:00  INFO 1160 --- [  restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration    : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:136f1fe4-463c-4bed-a903-ad32e0f4ce90'
2024-01-24T10:28:00.971+09:00  INFO 1160 --- [  restartedMain] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2024-01-24T10:28:00.997+09:00  INFO 1160 --- [  restartedMain] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 6.4.1.Final
2024-01-24T10:28:01.013+09:00  INFO 1160 --- [  restartedMain] o.h.c.internal.RegionFactoryInitiator    : HHH000026: Second-level cache disabled
2024-01-24T10:28:01.125+09:00  INFO 1160 --- [  restartedMain] o.s.o.j.p.SpringPersistenceUnitInfo      : No LoadTimeWeaver setup: ignoring JPA class transformer
2024-01-24T10:28:01.309+09:00  INFO 1160 --- [  restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
2024-01-24T10:28:01.311+09:00  INFO 1160 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
Hellocontroller 컴포넌트 스캔됨
2024-01-24T10:28:01.337+09:00  WARN 1160 --- [  restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2024-01-24T10:28:01.504+09:00  INFO 1160 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2024-01-24T10:28:01.525+09:00  INFO 1160 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port 8080 (http) with context path ''
2024-01-24T10:28:01.528+09:00  INFO 1160 --- [  restartedMain] com.example.demo.DemoApplication         : Started DemoApplication in 1.531 seconds (process running for 2.207)
2024-01-24T10:31:27.900+09:00  INFO 1160 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2024-01-24T10:31:27.900+09:00  INFO 1160 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2024-01-24T10:31:27.901+09:00  INFO 1160 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 1 ms
 
Tomcat initialized with port 8080
 
notion image
실행 결과
home 호출됨
 
 
@GetMapping("/hello")
    public String hello(){
        String name = "홍길동";
        return "<h1>hello "+name+"</h1>";
    }
notion image
 
/명령어가 중복된다면
@GetMapping("/hello")
    public String hello(){
        String name = "홍길동";
        return "<h1>hello "+name+"</h1>";
    }

    @GetMapping("/hello")
    public String random(){
        String name = "홍길동";
        return "<h1>hello "+name+"</h1>";
    }
 
실행 결과
Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-01-24T10:37:27.519+09:00 ERROR 13712 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Ambiguous mapping. Cannot map 'helloController' method 
com.example.demo.controller.HelloController#hello()
to {GET [/hello]}: There is already 'helloController' bean method
 
요청 할 때 마다 달라지는 페이지
@GetMapping("/random")
    public String random(){
        Random r = new Random();
        int num = r.nextInt(5)+1;
        return "<h1>random "+num+"</h1>";
    }
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정적 페이지, 동적 페이지

 
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실행 될때마다 매번 같은 화면을 보여주는 페이지를 정적페이지, 실행할 때 마다 바뀌는 페이지를 동적 페이지라 한다.
아파치로 가는 데이터는 전부 정적페이지
아파치 - 웹 서버 (정적) 톰캣 - 웹애플리케이션 서버 (동적) 자바코드가 필요함 식별자를 받아 파싱하고 서블릿을 요청, 동적페이지를 실행하려면 언어가 필요함
톰캣은 요청 severlet Request에 들어온요청을 보고 파싱
톰캣이 요청이들어오면 어노테이션을 보고 뉴 해서 서비스 메서드를 때림
모든요청은 프론트컨트롤러로가는데 그것을 서블릿이라한다.
디스패처는 리플렉션으로 구현되어있다.
개발자는 컨트롤러, DAO 작성
 
package org.example.demo2;

import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;

// 라우팅
public class Dispatcher {

    public static void route(String cmd, String action, HttpServletResponse resp) throws IOException {
        if(cmd.equals("user")){
            UserController con = new UserController();

            if(action.equals("login")){
                String html = con.login();
                resp.getWriter().println(html);
            }else if(action.equals("join")){
                String html = con.join();
                resp.getWriter().println(html);
            }


        }else if(cmd.equals("board")){
            resp.getWriter().println("<h1>board</h1>");
        }
    }
}
package org.example.demo2;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.io.PrintWriter;

@WebServlet("/*")
public class FrontController extends HttpServlet {

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setHeader("Content-Type", "text/html; charset=utf-8");

        String cmd = req.getParameter("cmd");
        String action = req.getParameter("action");
        Dispatcher.route(cmd, action, resp);
    }
}
package org.example.demo2;

public class UserController {

    public String login(){
        return "<h1>login</h1>";
    }

    public String join(){
        return "<h1>join</h1>";
    }
}
실습 주소 적는 법 : http://localhost:8080/?cmd=user&action=user
 
 
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예전엔 하나의 톰캣에 여러프로젝트를 만들었지만 지금은 톰캣을 여러개 다운받아 하나의 톰캣에 하나의 프로젝트만 넣는다
 
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Application context : / 만 남기고 다 지운다
notion image
 
 
service만 입력해도 자동완성 된다
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실행하면 Service call 이 작동한다.
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