SpringBoot2.x檔案上傳簡單案例
- Spring Boot檔案上傳簡單案例
-
- 1. 建立工程
- 2. pom.xml檔案
- 2. application.yml
- 3.前端fileupload.html
- 4. 後端控制器
Spring Boot檔案上傳簡單案例
本案例環境:
- SpringBoot: 2.3.0.RELEASE
- JDK: 1.8
- 模闆： thymeleaf
1. 建立工程
在IDEA中通過SpringBoot初始化向導建立一個名稱為yuan-fileupload的工程
2. pom.xml檔案
<?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>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>org.yuan</groupId>
<artifactId>yuan-fileupload</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>yuan-fileupload</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.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2. application.yml
server:
port: 8085
spring:
servlet:
multipart:
max-file-size: 1GB # 單個檔案上傳的大小
max-request-size: 1GB # 上傳的總檔案大小
3.前端fileupload.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>檔案上傳案例</title>
</head>
<body>
<form method="post" enctype="multipart/form-data" th:action="${#httpServletRequest.getContextPath()}+'/fileUpload'">
檔案1: <input type="file" name="files"><br>
檔案2: <input type="file" name="files"><br>
<input type="submit" value="上傳">
</form>
</body>
</html>
4. 後端控制器
FileUploadController.Java如下：
package org.yuan.yuanfileupload.fileupload;
import org.apache.commons.io.FilenameUtils;
import org.springframework.stereotype.Controller;
import org.springframework.util.ResourceUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.yuan.yuanfileupload.utils.ResultMsg;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;
/**
* <p>
* Description: 檔案上傳簡單案例 <br>
* <p>
* Author:jinshengyuan <br>
* Datetime: 2020/5/24 14:55
* </p>
*
* @since 2020/5/24 14:55
*/
@Controller
public class FileUploadController {
/**
* <p>
* Description: 跳轉至檔案上傳頁面的handler <br>
* <p>
* Author:jinshengyuan <br>
* Datetime: 2020/5/24 14:56
* </p>
*
* @return 跳轉的模闆名稱
* @since 2020/5/24 14:56
*/
@RequestMapping("/initUpload")
public String initUpload() {
return "fileUpload";
}
/**
* <p>
* Description: 檔案上傳方法<br>
* <p>
* Author:jinshengyuan <br>
* Datetime: 2020/5/24 14:57
* </p>
*
* @return 傳回上傳後的處理結果
* @since 2020/5/24 14:57
*/
@ResponseBody
@RequestMapping("/fileUpload")
public ResultMsg fileUpload(MultipartFile[] files, HttpServletRequest request) throws Exception {
for (MultipartFile file : files) {
String contentType = file.getContentType();
String originalFilename = file.getOriginalFilename();
String name = file.getName();
System.out.println("contentType:" + contentType);
System.out.println("originalFilename:" + originalFilename);
System.out.println("name:" + name);
//檔案名不為空則上傳
if (!StringUtils.isEmpty(originalFilename)) {
//檔案存放位置
//1.傳統的方式擷取伺服器跟目錄下的fileUpload路徑
//String realPath = request.getServletContext().getRealPath("/fileUpload");
//2.Springboot項目中擷取resource/static/fileupload路徑
String uploadPath = ResourceUtils.getURL("classpath:").getPath() + "static/fileUpload/";
System.out.println("uploadPath:" + uploadPath);
//檔案輸出目錄是否存在,不存在則建立
File dir = new File(uploadPath);
if (!dir.exists()) {
dir.mkdir();
}
//檔案名字首 日期+UUID
String fileNamePrefix = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()) + UUID.randomUUID().toString().replace("-", "");
//檔案字尾名
String fileExtendName = FilenameUtils.getExtension(originalFilename);
//輸出到指定的位置
String outFileName = fileNamePrefix.concat(".").concat(fileExtendName);
//檔案上傳至指定目錄
file.transferTo(new File(dir, outFileName));
} else {
//檔案名為空,跳出目前循環
continue;
}
}
return ResultMsg.success();
}
}
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