SpringBoot实现单文件上传

news2024/11/25 3:28:28

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