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File Upload system in Spring Boot App
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="ISO-8859-1"/> | |
| <title>Insert title here</title> | |
| </head> | |
| <body> | |
| <form th:action="@{/upload/system1}" method="post" enctype="multipart/form-data"> | |
| <input type="file" name="file"/> | |
| <input type="submit" value="Upload"/> | |
| </form> | |
| <form th:action="@{/upload/system2}" method="post" enctype="multipart/form-data"> | |
| <input type="file" name="file"/> | |
| <input type="submit" value="Upload"/> | |
| </form> | |
| <div> | |
| For System 1 | |
| <img th:if="${imageName}" th:src="@{/resources/} + ${imageName}"/> | |
| <br/> | |
| <hr/> | |
| <br/> | |
| For System 2 | |
| <img th:if="${imageName}" th:src="@{/resources/images/} + ${imageName}"/> | |
| </div> | |
| </body> | |
| </html> |
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| <?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.coderslab</groupId> | |
| <artifactId>file-upload</artifactId> | |
| <version>0.0.1-SNAPSHOT</version> | |
| <packaging>war</packaging> | |
| <name>file-upload</name> | |
| <description>File Upload System</description> | |
| <parent> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-parent</artifactId> | |
| <version>1.5.10.RELEASE</version> | |
| <relativePath/> <!-- lookup parent from repository --> | |
| </parent> | |
| <properties> | |
| <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> | |
| <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> | |
| <java.version>1.8</java.version> | |
| </properties> | |
| <dependencies> | |
| <dependency> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-thymeleaf</artifactId> | |
| </dependency> | |
| <dependency> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-web</artifactId> | |
| </dependency> | |
| <dependency> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-web-services</artifactId> | |
| </dependency> | |
| <dependency> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-tomcat</artifactId> | |
| <scope>provided</scope> | |
| </dependency> | |
| <dependency> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-test</artifactId> | |
| <scope>test</scope> | |
| </dependency> | |
| </dependencies> | |
| <build> | |
| <finalName>file-upload</finalName> | |
| <plugins> | |
| <plugin> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-maven-plugin</artifactId> | |
| </plugin> | |
| </plugins> | |
| </build> | |
| </project> |
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| package com.coderslab.controller; | |
| import java.io.File; | |
| import java.io.IOException; | |
| import java.nio.file.Files; | |
| import java.nio.file.Paths; | |
| import java.util.UUID; | |
| import javax.servlet.http.HttpServletRequest; | |
| import org.apache.coyote.UpgradeProtocol; | |
| import org.springframework.stereotype.Controller; | |
| import org.springframework.ui.Model; | |
| import org.springframework.web.bind.annotation.PostMapping; | |
| import org.springframework.web.bind.annotation.RequestParam; | |
| import org.springframework.web.multipart.MultipartFile; | |
| import org.springframework.web.servlet.mvc.support.RedirectAttributes; | |
| @Controller | |
| @RequestMapping("/upload") | |
| public class UploadController { | |
| @PostMapping("/system1") | |
| public String upload(@RequestParam("file") MultipartFile file, HttpServletRequest request, RedirectAttributes redirect) throws IOException { | |
| String uploadPath = request.getServletContext().getRealPath("resources/"); | |
| System.out.println(uploadPath); | |
| File dir = new File(uploadPath); | |
| if(!dir.exists()) { | |
| dir.mkdirs(); | |
| } | |
| String fileName = file.getOriginalFilename(); | |
| fileName = UUID.randomUUID() + "." + fileName.substring(fileName.lastIndexOf(".")); | |
| Files.copy(file.getInputStream(), Paths.get(uploadPath, fileName)); | |
| System.out.println(uploadPath + File.separator + fileName); | |
| redirect.addFlashAttribute("imageName", fileName); | |
| return "redirect:/upload"; | |
| } | |
| // This is another way to upload a file without HttpServletRequest | |
| @PostMapping("/system2") | |
| public String upload(@RequestParam("file") MultipartFile file, RedirectAttributes redirect) throws IOException { | |
| String uploadPath = "/opt/images/"; | |
| File dir = new File(uploadPath); | |
| if(!dir.exists()) { | |
| dir.mkdirs(); | |
| } | |
| //generate random file namee | |
| String fileName = file.getOriginalFilename(); | |
| fileName = UUID.randomUUID() + "." + fileName.substring(fileName.lastIndexOf(".")); | |
| Files.copy(file.getInputStream(), Paths.get(uploadPath, fileName)); | |
| //upload file on server | |
| redirect.addFlashAttribute("imageName", fileName); | |
| return "redirect:/upload"; | |
| } | |
| } |
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| package com.coderslab.config; | |
| import org.springframework.context.annotation.Configuration; | |
| import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; | |
| import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; | |
| import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; | |
| @Configuration | |
| public class WebMvcConfiguration extends WebMvcConfigurerAdapter{ | |
| @Override | |
| public void addViewControllers(ViewControllerRegistry registry) { | |
| registry.addViewController("/upload").setViewName("fileupload"); | |
| } | |
| //this is for System2 only | |
| @Override | |
| public void addResourceHandlers(ResourceHandlerRegistry registry) { | |
| super.addResourceHandlers(registry); | |
| registry.addResourceHandler("/resources/images/**").addResourceLocations("file:/opt/images/"); | |
| } | |
| } |
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This is a perfect way to upload a file on Spring Boot web application.
You can upload file into same directory when the application run on both in ide and live server.