controller
package kr.co.gudi.controller;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
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 org.springframework.web.multipart.MultipartFile;
import kr.co.gudi.service.FileService;
@Controller
public class FileController {
/*
저장한 사진을 보기 위해서는 server.xml 에 아래 내용을 추가해 줘야 한다.
<!-- /photo 라는 요청이 들어오면 C:/upload 로 연결해라 -->
<Context docBase="C:/upload" path="/photo"/>
*/
Logger logger = LoggerFactory.getLogger(getClass());
@Autowired FileService service;
@RequestMapping(value="/")
public String home() {
logger.info("index 페이지 요청");
return "index";
}
// 일반 파라메터는 MultipartFile 보다 뒤에 있어야 한다.
@RequestMapping(value="/upload", method = RequestMethod.POST)
public String upload(MultipartFile uploadFile, @RequestParam String title) {
logger.info("title : "+title);
logger.info("file : "+uploadFile.getOriginalFilename());
service.upload(uploadFile);
return "redirect:/list";
}
@RequestMapping(value="/multiUpload", method=RequestMethod.POST)
public String multiUpload(MultipartFile[] files) {
logger.info("file length : "+files.length);
service.multiUpload(files);
return "redirect:/list";
}
@RequestMapping(value="/list")
public String list(Model model) {
List<String> list = service.list();
model.addAttribute("list", list);
return "list";
}
@RequestMapping(value="/delete")
public String delete(@RequestParam String file) {
logger.info("file name : "+file);
service.delete(file);
return "redirect:/list";
}
}
service
package kr.co.gudi.service;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
@Service
public class FileService {
Logger logger = LoggerFactory.getLogger(getClass());
private String root = "C:/";
public void upload(MultipartFile uploadFile) {
// 1. 파일명 추출
String fileName = uploadFile.getOriginalFilename(); // image.jpg
String ext = fileName.substring(fileName.lastIndexOf(".")).toLowerCase();
System.out.println("확장자 : "+ext);
// 2. 파일명 변경 -> 중복되지 않는 이름으로 변경(현재시간을 밀리초로 환산한 이름)
String newFileName = System.currentTimeMillis()+ext; // 1234567981234.jpg
// 3. 파일 저장(java.nio)
try {
// 3-1. 객체로 부터 바이트 추출
byte[] arr= uploadFile.getBytes();
// 3-2. 저장할 경로와 파일명 지정
Path path = Paths.get(root+"upload/"+newFileName);
// 3-3. 파일 저장
Files.write(path, arr);
} catch (IOException e) {
e.printStackTrace();
}
}
public List<String> list() {
// c:/upload/ 의 파일 리스트 불러오기
File file = new File(root+"upload/");
String[] list= file.list();
System.out.println(Arrays.toString(list));
return Arrays.asList(list);
}
public void multiUpload(MultipartFile[] files) {
// 1. 배열 안의 파일 객체를 하나씩 꺼내서
for (MultipartFile file : files) {
try {
// 2. upload() 에서 했던 내용을 실행 해 준다.
upload(file);// 파일용량이 적으면 1밀리세컨드 안에 여러 파일을 업로드 하여 이름이 같아질 수 있다.
Thread.sleep(1); // 강제로 1밀리 세컨드씩 지연을 시킨다.
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void delete(String file) {
File f = new File(root+"upload/"+file);
if(f.exists()) {
f.delete();
}
}
}
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script src="https://code.jquery.com/jquery-3.7.0.min.js"></script>
<style></style>
</head>
<body>
<!-- 업로드 규칙 1: POST 방식으로 보낸다. -->
<!-- 업로드 규칙 2: enctype 설정 -->
<form action="upload" method="post" enctype="multipart/form-data">
<input type="text" name="title"/>
<input type="file" name="uploadFile"/>
<input type="submit" value="전송"/>
</form>
<hr/>
<form action="multiUpload" method="post" enctype="multipart/form-data">
<input type="file" name="files" multiple="multiple"/>
<input type="submit" value="전송"/>
</form>
</body>
<script></script>
</html>list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script src="https://code.jquery.com/jquery-3.7.0.min.js"></script>
<style>
img{
cursor: pointer;
}
</style>
</head>
<body>
<c:if test="${list.size() == 0}">
<p>등록된 사진이 없습니다.</p>
</c:if>
<c:forEach items="${list}" var="path">
<p>
<img src="/photo/${path}" width="250"/>
</p>
</c:forEach>
</body>
<script>
$('img').on('click',function(){
var path = $(this).attr('src');
var fileName = path.substring(path.lastIndexOf('/')+1);
console.log(fileName);
location.href='delete?file='+fileName;
});
</script>
</html>
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>kr.co</groupId>
<artifactId>gudi</artifactId>
<name>13_FileService</name>
<packaging>war</packaging>
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
<java-version>1.8</java-version>
<org.springframework-version>4.3.14.RELEASE</org.springframework-version>
<org.aspectj-version>1.6.10</org.aspectj-version>
<org.slf4j-version>1.6.6</org.slf4j-version>
</properties>
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<!-- File Upload 관련 -->
<!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.7</version>
</dependency>
<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${org.aspectj-version}</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</exclusion>
<exclusion>
<groupId>javax.jms</groupId>
<artifactId>jms</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
</exclusions>
<scope>runtime</scope>
</dependency>
<!-- @Inject -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<additionalProjectnatures>
<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
</additionalProjectnatures>
<additionalBuildcommands>
<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
</additionalBuildcommands>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<compilerArgument>-Xlint:all</compilerArgument>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<configuration>
<mainClass>org.test.int1.Main</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
web.xml
<?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>
<!-- 한글깨짐 방지 : 특정한 내용이 오면 걸러서 특정한 처리를 해 준다. -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!-- 사용할 인코딩 -->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<!-- 강제인코딩 -->
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<!-- 언제(어떤요청시) 어떤 필터를 사용 할 것인지? -->
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
servlet-context.xml
<?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="kr.co.gudi" />
</beans:beans>
root-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- upload 규칙 3: 업로드 할 크기를 지정해 준다. -->
<!-- encoding 설정 -->
<!-- 업로드 크기 설정(maxFileSize) -->
<!-- 버퍼에 저장할 용량(fileSizeThreshold) -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"/>
<property name="maxUploadSize" value="50000000"/>
<property name="maxInMemorySize" value="50000000"/>
</bean>
</beans>
시작