1.目錄結構
2.upload.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>SpringBoot上傳文件</title>
</head>
<body>
<h1>測試SpringBoot文件上傳</h1>
<form th:action="@{/file/uploadByJarDeploy}" method="post" enctype="multipart/form-data">
<input type="file" name="file"/>
<input type="submit" value="上傳文件">
</form>
</body>
</html>
3.FileController.java
package xin.baizhiedu.controller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;
@Controller
@RequestMapping("/file")
public class FileController {
private static final Logger log = LoggerFactory.getLogger(FileController.class);
@Value("${file.upload.dir}")
private String realPath;
/**
* 第二種文件上傳
* 注意：這種方式適用於任何一種部署方式 推薦使用這種方式
*
* @param file
* @return
* @throws IOException
*/
@RequestMapping("/uploadByJarDeploy")
// 定義：接收文件對象 MultipartFile file變量名要與form表單中input type="file" 標簽name屬性名一致
public String uploadByJarDeploy(MultipartFile file) throws IOException {
// 文件名
String originalFilename = file.getOriginalFilename();
log.debug("文件名: {}", file.getOriginalFilename());
log.debug("文件大小: {}", file.getSize());
log.debug("文件類型: {}", file.getContentType());
// 改文件名
String ext = originalFilename.substring(originalFilename.lastIndexOf("."));
String newFileName = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-SSS-").format(new Date()) + UUID.randomUUID() + ext;
// 上傳文件到哪
file.transferTo(new File(realPath, newFileName));
return "redirect:/";
}
/**
* 用來測試文件上傳 - 這種方式：不能用於jar包部署
* 注意：這種方式存在局限性, 不推薦再使用這種方式進行文件上傳了
*
* @return
*/
/*
@RequestMapping("/uploadFile")
// 定義：接收文件對象 MultipartFile file變量名要與form表單中input type="file" 標簽name屬性名一致
public String uploadFileTest(MultipartFile file, HttpServletRequest request) throws IOException {
// 文件名
String originalFilename = file.getOriginalFilename();
log.debug("文件名: {}", file.getOriginalFilename());
log.debug("文件大小: {}", file.getSize());
log.debug("文件類型: {}", file.getContentType());
// 處理文件上傳
// 1.根據相對路徑 "uploads" 獲取絕對路徑
String realPath = request.getSession().getServletContext().getRealPath("/uploads");
log.debug("獲取的絕對路徑: {}", realPath);
// 2.上傳文件 參數1：將文件寫入到那個目錄
// 修改文件名
String ext = originalFilename.substring(originalFilename.lastIndexOf("."));
String newFileName = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-SSS-").format(new Date()) + UUID.randomUUID() + ext;
file.transferTo(new File(realPath, newFileName));
return "redirect:/";
}
*/
}
4.application.yml
server:
port: 8080
# servlet:
# context-path: /springboot-file
spring:
servlet:
multipart: # # 修改文件上傳的大小限制
max-request-size: 1024MB # 運行請求傳遞文件大小最大為1024MB
max-file-size: 1024MB # 運行服務器可以處理的最大文件大小1024MB
profiles:
active: local # 激活本地配置生效
logging:
level:
root: info
xin.baizhiedu.controller: debug
# 指定文件上傳位置
#file:
# upload:
# dir: D:\temp\1 # 指定本地測試上傳目錄
5.application-local.yml
# 指定文件上傳位置
file:
upload:
dir: D:\temp\1 # 指定本地測試上傳目錄 (Windows系統)
6.application-prod.yml
# 指定文件上傳位置
file:
upload:
dir: /home/user/uploads # 指定服務器測試上傳目錄（Linux系統）
7.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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>xin.baizhiedu</groupId>
<artifactId>springboot_day05-uploadFiles</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot_day05-uploadFiles</name>
<description>Demo project for Spring Boot</description>
<properties>
<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-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
8.測試
