JX405기_비트/Spring Framework

Day45-1 Spring Framework 기본 실행 방법 익히기

_하루살이_ 2023. 3. 15. 21:23

JSTL 사용하기 pom.xml추가

https://mvnrepository.com/artifact/javax.servlet/jstl/1.2

<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

 

 

 

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bit</groupId>
    <artifactId>spring</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>16</maven.compiler.source>
        <maven.compiler.target>16</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.25</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

    </dependencies>

</project>

아티팩트에 추가하기 Put into Output Root

 

 

 

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>인덱스</title>
</head>
<body>
    <h1>HELLO WORLD!!</h1>
    <h2>${name}님 환영합니다!!</h2>
</body>
</html>

 

 

HomeController.java

package com.bit.spring.controller;

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

@Controller
public class HomeController {
    @RequestMapping("/")
    public String showIndex(Model model){
        System.out.println("인덱스 화면으로 이동합니다.");
        String name = "관리자";
        model.addAttribute("name" , name);

        return  "index";
    }
}

 

결과

 

 

web.xml에 filter 설정해주기

<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encodingFilter</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
  • 객체의 선언과 생성을 담당 filter-class
  • 객체의 값 UTF-8

 

 

dispatcherServlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/applicationContext.xml</param-value>
    </context-param>
    
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encodingFilter</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring/dispatcherServlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

 

 

 

URL 상에 입력한 값을 연결하기

HomeController.java

package com.bit.spring.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HomeController {
    @RequestMapping("/")
    public String showIndex(Model model){
        System.out.println("인덱스 화면으로 이동합니다.");
        String name = "관리자";
        model.addAttribute("name" , name);

        return  "index";
    }

    @RequestMapping("/{id}")
    public String showId(Model model, @PathVariable int id){
        model.addAttribute("id", id);

        return "index";
    }
}

 

 

 

index.jsp 수정하기

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>인덱스</title>
</head>
<body>
    <h1>HELLO WORLD!!(*/ω＼*)</h1>
    <h2>${name}님 환영합니다!!</h2>
<core:if test="${id ne null}">
    <h3>사용자가 입력한 id : ${id}</h3>
</core:if>
</body>
</html>

 

URL에 /24 입력하니 입력한 값이 나타남

 

Get 방식의 표현 3가지

//get 방식 표현 3가지
 @RequestMapping(value = "/show")
    public String showInfo(){
        
        return "show";
  }


 @RequestMapping(value = "/show", method = RequestMethod.GET)
    public String showInfo(){
        
        return "show";
 }
    
    
    
 @GetMapping('/show')
    public String showInfo(){
        return "show";
 }

 

 

 

index.jsp 수정 show로 이동하는 <a>태그 추가하기

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>인덱스</title>
</head>
<body>
    <h1>HELLO WORLD!!(*/ω＼*)</h1>
    <h2>${name}님 환영합니다!!</h2>
<core:if test="${id ne null}">
    <h3>사용자가 입력한 id : ${id}</h3>
</core:if>
<a href="/show?id=1&name=admin&rank=tutor">!!!show로 이동!!!</a>
</body>
</html>

 

 

 

show.jsp 추가하기

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>정보 보기</title>
</head>
<body>
  <h1>${id}</h1><br>
  <h2>${name}</h2><br>
  <h3>${rank}</h3><br>
</body>
</html>

 

 

HomeController.java  @GetMapping 추가하기

package com.bit.spring.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.net.http.HttpRequest;

@Controller
public class HomeController {
    @RequestMapping("/")
    public String showIndex(Model model){
        System.out.println("인덱스 화면으로 이동합니다.");
        String name = "관리자";
        model.addAttribute("name" , name);

        return  "index";
    }

    @RequestMapping("/{id}")
    public String showId(Model model, @PathVariable int id){
        model.addAttribute("id", id);

        return "index";
    }

    //get 방식 표현
    @GetMapping("/show")
    public String showInfo(Model model, int id, String name, String rank){
        System.out.println("id : " + id);
        System.out.println("name : " + name);
        System.out.println("rank : " + rank);

        model.addAttribute("id", id);
        model.addAttribute("name", name);
        model.addAttribute("rank", rank);

        return "show";
    }

}

 

결과

 

DTO의 값을 이용한 값을 가져오기

lombok 추가하기 https://mvnrepository.com/artifact/org.projectlombok/lombok/1.18.26

<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.26</version>
            <scope>provided</scope>
        </dependency>

 

 

 

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bit</groupId>
    <artifactId>spring</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>16</maven.compiler.source>
        <maven.compiler.target>16</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.25</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.26</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

</project>

model MemberDTO 생성

MemberDTO

package com.bit.spring.model;

import lombok.Data;

@Data
public class MemberDTO {
    private int id;
    private String name;
}

 

 

homeController.java MemberDTO의 값을 가져오게 하

 @GetMapping("/show")
    public String showInfo(Model model, MemberDTO memberDTO, String rank){
        System.out.println("id : " + memberDTO.getId());
        System.out.println("name : " + memberDTO.getName());
        System.out.println("rank : " + rank);

        model.addAttribute("id", memberDTO.getId());
        model.addAttribute("name", memberDTO.getName();
        model.addAttribute("rank", rank);

        return "show";
    }

 

 

homeController.java

package com.bit.spring.controller;

import com.bit.spring.model.MemberDTO;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.net.http.HttpRequest;

@Controller
public class HomeController {
    @RequestMapping("/")
    public String showIndex(Model model){
        System.out.println("인덱스 화면으로 이동합니다.");
        String name = "관리자";
        model.addAttribute("name" , name);

        return  "index";
    }

    @RequestMapping("/{id}")
    public String showId(Model model, @PathVariable int id){
        model.addAttribute("id", id);

        return "index";
    }

    //get 방식 표현
    @GetMapping("/show")
    public String showInfo(Model model, MemberDTO memberDTO, String rank){
        System.out.println("id : " + memberDTO.getId());
        System.out.println("name : " + memberDTO.getName());
        System.out.println("rank : " + rank);

        model.addAttribute("id", memberDTO.getId());
        model.addAttribute("name", memberDTO.getName();
        model.addAttribute("rank", rank);

        return "show";
    }

}

 

 

memberDTO의 id와 name을 파라미터에 입력한 값으로 자동 바인딩

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