spring_4일차_Legacy

youuu·2022년 10월 20일
Springlegacy스프링
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SPRING

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❗ 예제 배포 금지!


👨‍🏫💬 리뷰 :

  • CPU 선점 / 비선점 이 있다.
    최근 >> 비선점 추세
    ex) 임베디드 시스템 나는 내 일을 한다
  • 요새 프로젝트는 MVC + ORM
    My Batis : 파샬맵핑 > 부분적으로 DB설정 >> 한국에서 주로 사용
    JPA : 풀 맵핑 >> 어렵다..(DB를 잘 알아야함) 서양권

✔ 예전엔 Legacy가 대세였으나 요즘은 Boot가 더 많다!

🔺 배우는이유? 쓰는 회사도 있고 알긴해야해서.

Legacy 프로젝트 생성

아래처럼 만들고 기다리면 컨트롤러도 만들어진다! 🥰





HomeController .java

  1. 컨트롤러를 열어서 System.out.println("HomeController home Start..."); 를 추가해보기
  2. 실행은 home.jsp

✔ 컨트롤러 : @Controller 해줌.
✔ logger ? 나의 메세지 뿌려줌
logger.info("Welcome home! The client locale is {}.", locale);


package com.oracle.mvc01;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * Handles requests for the application home page.
 */
@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	/**
	 * Simply selects the home view to render by returning its name.
	 */
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		System.out.println("HomeController home Start...");
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		
		String formattedDate = dateFormat.format(date);
		
		model.addAttribute("serverTime", formattedDate );
		
//		<beans:property name="prefix" value="/WEB-INF/views/" />
//		<beans:property name="suffix" value=".jsp" />
//		/WEB-INF/views/ + home + .jsp
		
		return "home";
	}
	@RequestMapping(value = "/member", method = RequestMethod.GET)
	public String member(Model model) {
		System.out.println("HomeController member Start...");
		
		model.addAttribute("serverTime", model);
		
		return "home";
	}
}

✔ 프로젝트 시 mvc01를 하나 더 만들면 안된다. ??
mvc01.service 이런식으로 사용.


📕 Spring MVC

Model에다 담아서 View단에서 EL 표기법으로 사용.


참고 github


Spring MVC VS Spring BOOT

✔ 둘의 차이는 설정의 자동화.

  • Spring MVC구조는
    XML 파일들에 Dispatcher Servlet, Handler Mapping, View Resolver 설정을 해줘야함. 일일이 다 설정 해줘야한다😬
  • Spring Boot는 @ 만 적절하게 명시해주면 Spring 이 알아서 다 처리! 🥰

context
광의의 개념 디스크에 있는걸 메모리에 옮김
협의의 개념 밖에

view 단의 루트
java 단의 루트
root-context.xml 빈설정하고 여기서 쓴다.

📌 web.xml

web.xml 을 보면
DispatcherServlet >> 프리 컨트롤러가 된다.

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

	<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/root-context.xml</param-value>
	</context-param>
	
	<!-- Creates the Spring Container shared by all Servlets and Filters -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- Processes application requests -->
	<servlet>
		<servlet-name>appServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
		
	<servlet-mapping>
		<servlet-name>appServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>

</web-app>

💻 결과화면 :

servlet-context.xml

  • <resources mapping="/resources/**" location="/resources/" /> resources 안에 이미지 파일 넣으면 된다
  • ViewResolver : 아래 beans로 view 파일 지정해줌<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
  • com.oracle.mvc01 내가 만든 패키지<context:component-scan base-package="com.oracle.mvc01" />

✔ 원리 이해하기

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:beans="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd
		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

	<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
	
	<!-- Enables the Spring MVC @Controller programming model -->
	<annotation-driven />

	<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
	<resources mapping="/resources/**" location="/resources/" />

	<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
	<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>
	
	<context:component-scan base-package="com.oracle.mvc01" />
	
</beans:beans>

📌 화면 깨지는것 처리

  • 위에서 실행 해봤을때 깨졌었다.
    The time on the server is 2022? 10? 20? ?? 10? 33? 18? KST.

✔ UTF-8 encoding 처리해주기

  1. pom.xml에서 버전 올려주기.

  2. web.xml 에서 한글처리 해주기.

📌 web.xml

한글처리 주석부분 작성!

버전 올려줘도 자동완성은 안되었다.
🙄 버전을 더 올려줘야 하는걸까


<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

   <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
   <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/spring/root-context.xml</param-value>
   </context-param>
   
   <!-- Creates the Spring Container shared by all Servlets and Filters -->
   <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
   </listener>
   
   <!--  한글처리       -->
   <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>
      <init-param>
         <param-name>forceEncoding</param-name>
         <param-value>true</param-value>
      </init-param>
   </filter>
   <filter-mapping>
      <filter-name>encodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
   </filter-mapping>

   <!-- Processes application requests -->
   <servlet>
      <servlet-name>appServlet</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
      </init-param>
      <load-on-startup>1</load-on-startup>
   </servlet>
      
   <servlet-mapping>
      <servlet-name>appServlet</servlet-name>
      <url-pattern>/</url-pattern>
   </servlet-mapping>

</web-app>

💻 결과화면 :


🔺 맨처음 실행시 아래처럼 나오는데. WEB-INF/views/home.jsp 이부분을 지워주면 나온다.

pom.xml

pom.xml의 Dependencies를 보면 아래처럼 다양한것을 사용 할수 있음을 알 수 있다.

📌 home.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<html>
<head>
	<title>Home</title>
</head>
<body>
<h1>
	Hello world!  
</h1>

<P>  The time on the server is ${serverTime}. </P>
<p> <img alt="반짝이" src="resources/img/hot.gif">
</body>
</html>

💻 결과화면 :





💼 och07_MVC02

📂 com.oracle.mvc02


📌📋 HomeController.java

  • View 사용 @RequestMapping(value = "/board/view")
  • Model 사용 @RequestMapping ("/board/content")
    ✔ String 으로 선언 + () 안에 Model을 넣어야 한다.
    ✔ model.addAttribute("id", 365); (= request.set)
    🔺 spring에선 model.addAttribute 로 사용
  • ModelAndView 사용 `@RequestMapping("/board/reply")
    ✔ 객체를 return형으로 선언 (view이름까지 한번에 전달)

✔ 모델을 일반적으로 많이 쓴다

package com.oracle.mvc02;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		
		String formattedDate = dateFormat.format(date);
		
		model.addAttribute("serverTime", formattedDate );
		
		return "home";
	}
	
	@RequestMapping(value = "/board/view")
	public String view() {
		logger.info("Welcome home! {} start =========", "/board/view");
		return "board/view";
	}
	
	// 모델 사용 - 모델을 담아서 가야한다 => String으로 
	@RequestMapping ("/board/content")
	public String content(Model model) {
		System.out.println("HomeController content Start =========");
		model.addAttribute("id", 365); // id 라는 변수값에 365을 담아서 보내겠다
		
		return "board/content";
	}
	
	// ModelAndView 사용 => view이름까지 한번에 전달하기때문에 객체를 return형으로 선언
	@RequestMapping("/board/reply")
	public ModelAndView reply() {
		System.out.println("HomeController reply Start =========");
		
		// 목적 : 파라메터와 View를 한방에 처리
		ModelAndView mav = new ModelAndView();
		mav.addObject("id", 50);
		mav.setViewName("board/reply"); // () 안에 전달해줄 이름 작성
		
		return mav;
		
	}	
}

💻 결과화면 :

controller에서 실행.



📋 view .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>view.jsp</h1>

</body>
</html>



📋 home .jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<html>
<head>
	<title>Home</title>
</head>
<body>
<h1>
	Hello world!  
</h1>
<P>  The time on the server is ${serverTime}. </P>
</body>
</html>



📋 content .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>content.jsp</h1>
	당신의 ID는 ? ${id}
</body>
</html>



⭐ 라이브러리 다운 실패시

🔺네트워크 불안할때.
잘되는 사람의 m2를 압축해서 복붙 한다.
위치 : C:\Users\admin\.m2



💼 och07_MVC03

📂 com.oracle.mvc03


📌📋 HomeController.java

@RequestParam 을 사용하면 값이 null 이면 화면이 아예 안넘어간다.
Member member member에 다 담아서 이동.
(* member, jsp의 컬럼이 같다는 전제하에 가능.)

package com.oracle.mvc03;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import com.oracle.mvc03.dto.Member;

@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		
		String formattedDate = dateFormat.format(date);
		
		model.addAttribute("serverTime", formattedDate );
		
		return "home";
	}
	
	@RequestMapping("board/confirmId")
	public String confirmId(HttpServletRequest httpServletRequest, Model model) {
		logger.info("confirmId Start ===========");
		String id = httpServletRequest.getParameter("id");
		String pw = httpServletRequest.getParameter("pw");
		
		System.out.println("board/confirmId ID ===>" + id);
		System.out.println("board/confirmId PW ===>" + pw);
		model.addAttribute("id", id);
		model.addAttribute("pw", pw);
		
		return"board/confirmId";
	}
	
	// 파라미터 Force(강제)
	@RequestMapping("board/checkId")
	public String checkId(@RequestParam("id") String idd, @RequestParam("pw") int passwd, Model model) {
		logger.info("checkId Start ===========");
		System.out.println("board/checkId idd ==> " + idd);
		System.out.println("board/checkId passwd ==> " + passwd);
		model.addAttribute("identify", idd);
		model.addAttribute("password", passwd);
		
		return "board/checkId";
	}
	
	// 파라미터 Force(강제) << @RequestParam 
	@RequestMapping("member/join")
	public String member(@RequestParam("name") String name, @RequestParam("id") String id,
							@RequestParam("pw") String pw, @RequestParam("email") String email, Model model) {
		System.out.println("member/join name  => " + name);
		System.out.println("member/join id    => " + id);
		System.out.println("member/join pw    => " + pw);
		System.out.println("member/join email => " + email);
		
		Member member = new Member();
		member.setName(name);
		member.setId(id);
		member.setPw(pw);
		member.setEmail(email);
		
		model.addAttribute("member", member);
		return "member/join";
	}
	
    // DTO 파라미터
	@RequestMapping("member/join/dto")
	public String memberDto(Member member, Model model) {
		System.out.println("member/join getName  => " + member.getName());
		System.out.println("member/join getid    => " + member.getId());
		System.out.println("member/join getpw    => " + member.getPw());
		System.out.println("member/join getemail => " + member.getEmail());
        System.out.println("member/join member => " + member);
		
		model.addAttribute("member", member);
		return "member/join";
	}
}

💻 결과화면 :

  • board/confirmId 를 입력.
    ? 이하는 값을 안넣어줘서 보기 위해 넣은것.
    ✔ 값을 안주면 null값을 들어감

  • board/checkId 를 입력.
    ? 값 을 안넣으면 화면 자제가 보이지 않는다.
    ✔ 값을 안주면 오류!

Member

  • board/checkId





📋 content .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>confirmId.jsp</h1>
	ID : ${id}<br>
	PW : ${pw}
</body>
</html>



📋 checkId .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>checkId.jsp</h1>
		ID : ${identify}<br>
		PW : ${password}
</body>
</html>



📋 Member .jsp

멤버 변수를 toString() 형태로 만들어서 써도 좋다.

package com.oracle.mvc03.dto;

public class Member {
	private String name;
	private String id;
	private String pw;
	private String email;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getPw() {
		return pw;
	}
	public void setPw(String pw) {
		this.pw = pw;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}

	@Override
	public String toString() {
		String returnStr = "[이름 : " + this.name + " , id : " + this.id + "]";
		return returnStr;
	}
}



📋 join .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>join.jsp</h1>
	이름 :	${member.name}<br/>
	아이디 :	${member.id}<br/>
	비밀번호 :	${member.pw}<br/>
	이메일:	${member.email}

</body>
</html>



컨트롤러 갔다오기

💼 och07_MVC04_1

📂 com.oracle.mvc041


📌📋 HomeController.java

🚩

Get은 조회할때. Post는 입력할때

✔ index.jsp에서 <form action="student" method="post"> 으로 요청했기 때문에
Get 으로 하면 오류.
Post 방식으로 하면 제대로 나온다.

package com.oracle.mvc041;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		
		String formattedDate = dateFormat.format(date);
		
		model.addAttribute("serverTime", formattedDate );
		
		return "home";
	}
	
	@RequestMapping("index")
	public String goIndex() {
		logger.info("index Start ====");
		
		return "index";
	}
	
//	@RequestMapping("student")
	@RequestMapping(value = "student", method = RequestMethod.GET)
	public String getStudent(HttpServletRequest request, Model model) {
		logger.info("getStudent Start ==========");
		String id = request.getParameter("id");
		System.out.println("GET id : " + id);
		model.addAttribute("studentId", id);
		
		return "student/studentId";
	}
	
	@RequestMapping(value = "student", method = RequestMethod.POST)
	public String postStudent(HttpServletRequest request, Model model) {
		logger.info("postStudent Start ==========");
		String id = request.getParameter("id");
		System.out.println("POST id : " + id);
		model.addAttribute("studentId", id);
		
		return "student/studentId";
	}
}

💻 결과화면 :




📋 index .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="student" method="post">
		student id : <input type="text" name="id"><br/>
		<input type="submit" value="전송">
	</form>
</body>
</html>



📋 studentId .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>studentId.jsp</h1>
	studentId : ${studentId}
</body>
</html>

에러종류

에러 종류 참고

400 파라미터나 문법을 잘못 넘겨줬을때
404 못찾겠다
405 메소드가 잘못 된것get, post 잘못

💼 och07_MVC04_2

📂 com.oracle.mvc042



📌📋 HomeController.java

두가지 방법으로 실행.
studentView1, studentView2 =>> 같은 View를 사용. 이름만 다른것
한줄로 쓰기 :@ModelAttribute("studentInfo") StudentInformation studentInformation)

package com.oracle.mvc042;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.oracle.mvc042.dto.StudentInformation;

@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		
		String formattedDate = dateFormat.format(date);
		
		model.addAttribute("serverTime", formattedDate );
		
		return "home";
	}
	
	@RequestMapping("/index")
	public String index() {
		System.out.println("HomeController index Start .......");
		return "index";
	}
	
	@RequestMapping("/studentView1")
	public String studentView1(StudentInformation studentInformation, Model model) {
		logger.info("===== studentView1 Start .......");
		System.out.println("studentInformation getName() ->> " 	   + studentInformation.getName());
		System.out.println("studentInformation getAge() ->> " 	   + studentInformation.getAge());
		System.out.println("studentInformation getGradeNum() ->> " + studentInformation.getGradeNum());
		System.out.println("studentInformation getClassNum() ->> " + studentInformation.getClassNum());
		
		model.addAttribute("studentInfo", studentInformation);
		return "studentView";
	}
	
	@RequestMapping("/studentView2")
	// 한방에 다 해결. model 안써도 된다.  아래처럼 쓰면 한번에 다 넣을 수 있다. 위랑 같은데 다른 방식으로.
	public String studentView2(@ModelAttribute("studentInfo") StudentInformation studentInformation) {
		logger.info("===== studentView2 Start .......");
		System.out.println("studentInformation2 getName() ->> " 	   + studentInformation.getName());
		System.out.println("studentInformation2 getAge() ->> " 	   + studentInformation.getAge());
		System.out.println("studentInformation2 getGradeNum() ->> " + studentInformation.getGradeNum());
		System.out.println("studentInformation2 getClassNum() ->> " + studentInformation.getClassNum());
		
		return "studentView";
	}
}

💻 결과화면 :





❗ <%=context%>

<%=context%> 넣는 이유 ?
폴더가 깊어지면? 경로를 잘 못찾기 때문에 사용한다. 프로젝트 작업시 꼭 적어주기.
<form action="<%=context%>/studentView1" method="post">


📋 index .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
	<% String context = request.getContextPath(); %>
</head>
<body>
	context : <%=context%><p/>
	<form action="studentView" method="post">
		이름 : <input type="text" name="name"><br/>
		나이 : <input type="text" name="age"><br/>
		학년 : <input type="text" name="gradeNum"><br/>
		   반 : <input type="text" name="classNum">
		<input type="submit" value="전송">
	</form>
</body>
</html>



📂 com.oracle.mvc042.dto

📋 StudentInformation .java

package com.oracle.mvc042.dto;

public class StudentInformation {
	private String name;
	private String age;
	private String gradeNum;
	private String classNum;
	
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getAge() {
		return age;
	}
	public void setAge(String age) {
		this.age = age;
	}
	public String getGradeNum() {
		return gradeNum;
	}
	public void setGradeNum(String gradeNum) {
		this.gradeNum = gradeNum;
	}
	public String getClassNum() {
		return classNum;
	}
	public void setClassNum(String classNum) {
		this.classNum = classNum;
	}
}

📋 studentView .jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>studentView.jsp</h1>
	이름 : ${studentInfo.name}<br/>
	나이 : ${studentInfo.age}<br/>
	학년 : ${studentInfo.gradeNum}<br/>
	  반 : ${studentInfo.classNum}<br/>
	
</body>
</html>



💼 och07_MVC04_3

📂 com.oracle.mvc043


📌📋 HomeController.java

package com.oracle.mvc043;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		
		String formattedDate = dateFormat.format(date);
		
		model.addAttribute("serverTime", formattedDate );
		
		return "home";
	}
}

컨트롤러 만들기.

spring 에서는 조원이 각자 컨트롤러를 만들어서 작업한다.



📌📋 RedirectController.java

  • 성공하면 같은 Controller 내에 메소드로 이동.
  • ⭐ id가 "abc" 면 성공.
    주소창에 id=abc만 입력해주면 .jsp를 찾아서 이동해준다

✔ @RequestMapping("studentError") 추가
아이디가 다르면 studentError로 빠짐.

package com.oracle.mvc043;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class RedirectController {
	
	private static final Logger logger = LoggerFactory.getLogger(RedirectController.class);
	
	@RequestMapping("studentConfirm")
	public String studentRedirect(HttpServletRequest httpServletRequest, Model model) {
		
		logger.info("studentConfirm start ...");
		
		String id =  httpServletRequest.getParameter("id");

		logger.info("studentConfirm id ->{} ",  id);
		
		String pw =  "1234";
		
		 model.addAttribute("id", id);
		 model.addAttribute("pw", pw);
		 
		 // 성공이라고 가정 --> 같은 Controller 내에 메소드로 이동.
		 if(id.equals("abc")) {
			 return "redirect:studentSuccess";
		 }
		 // 아니면 실패
		return "redirect:studentError";
	}
	
	@RequestMapping("studentSuccess")
	public String studentSuccess (HttpServletRequest request, Model model) {
		logger.info("studentSuccess start... ");
		String id = request.getParameter("id");
		String password = request.getParameter("pw");
		
		logger.info("studentConfirm id ->{} ",  id);
		logger.info("studentConfirm password ->{} ",  password);
		
		model.addAttribute("id", id);
		model.addAttribute("password", password);
		
		return "student/studentSuccess";
	}
    
    	@RequestMapping("studentError")
	public String studentError(Model model) {
		logger.info("studentError start... ");
		
		return "student/studentError";
	}
}



📋 studentSuccess.jsp

파일위치 :
main - webapp - WEB-INF - views - student - studentSuccess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>studentSuccess.jsp</h1>
	ID : ${id}<br/>
	PW : ${password}
</body>
</html>



📋 studentError.jsp

파일위치 :

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>studentSuccess.jsp</h1>
	넌 누구냐<p>
	<h1>20년간 만두만</h1> 주고...
	id : ${id}
</body>
</html>
profile
youuu
공부중인 주니어 개발자
이전 포스트

spring_3일차_AOP_@

다음 포스트

spring_5일차_Validate

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