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SpringBoot实现单文件上传

news 2025/6/28 0:21:49

一、在springBoot项目中的pom.xml添加依赖。

 <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency>

二、在资源目录下的static目录下中创建一个upload.html的表单文件：

文件的内容如下：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>图片上传页面</title>
</head>
<body>
<form action="/upload" method="post" enctype="multipart/form-data">
<input type="file" name="uploadFile" value="请选择文件">
<input type="submit" value="上传">
</form>
</body>
</html>

接口是/upload，请求方式是post

三、创建文件上传处理接口：

package org.sang.cc;import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;import javax.servlet.http.HttpServletRequest;import org.springframework.util.ResourceUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;@RestController
public class FileUploadController {SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd");@PostMapping("/upload")public String upload(MultipartFile uploadFile,HttpServletRequest req){try {//String realPath=req.getSession().getServletContext().getRealPath("/");String realPath=ResourceUtils.getURL("classpath:").getPath();		String format=sdf.format(new Date());System.out.println("realPath:"+realPath+"static/"+format);File folder=new File(realPath+"static/"+format);if(!folder.isDirectory()){folder.mkdirs();}String oldName=uploadFile.getOriginalFilename();String newName=UUID.randomUUID().toString()+oldName.substring(oldName.lastIndexOf("."),oldName.length());uploadFile.transferTo(new File(folder,newName));String filePath=req.getScheme()+"://"+req.getServerName()+":"+req.getServerPort()+"/static/"+format+"/"+newName;return filePath;}catch(IOException e){e.printStackTrace();}return "上传失败!";}
}

将上传的文件存储在static目录下，返回一个路径字符串

四、上传文件配置：

配置application.properties文件内容

spring.servlet.multipart.enabled=true
spring.servlet.multipart.file-size-threshold=0
spring.servlet.multipart.location=E:\\temp
spring.servlet.multipart.max-file-size=1MB
spring.servlet.multipart.max-request-size=10MB
spring.servlet.multipart.resolve-lazily=false