本文共 3334 字，大约阅读时间需要 11 分钟。

1、pom.xml

               
    
     org.springframework.boot
                
    
     spring-boot-starter-web
            
           
               
    
     commons-io
                
    
     commons-io
                
    
     2.4
            
           
           
               
    
     commons-fileupload
                
    
     commons-fileupload
                
    
     1.3.3
            
   

2、SpringBootApplication

package cn.hadron;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.MultipartConfigFactory;import org.springframework.context.annotation.Bean;import javax.servlet.MultipartConfigElement;@SpringBootApplicationpublic class DbApplication {    public static void main(String[] args) {        SpringApplication.run(DbApplication.class, args);    }    @Bean    public MultipartConfigElement multipartConfigElement() {        MultipartConfigFactory factory = new MultipartConfigFactory();        //单个文件最大   KB,MB        factory.setMaxFileSize("100MB");        /// 设置总上传数据总大小        factory.setMaxRequestSize("500MB");        return factory.createMultipartConfig();    }}

3、controller

package cn.hadron.controller;importcn.hadron.db.util.FileUtil;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.multipart.MultipartFile;import java.io.File;import java.io.IOException;@Controller@RequestMapping(value = "/file")public class FileController {    @RequestMapping(value="/upload.do",method= RequestMethod.POST)    public String upload(@RequestParam("dir") MultipartFile[] dir) {        System.out.println("上传文件夹...");        File file;        String fileName="";        String filePath="";        for (MultipartFile f : dir) {            fileName=f.getOriginalFilename();            String type=f.getContentType();            System.out.println("\n"+fileName+" ,"+type);            filePath="D:\\upload\\"+fileName.substring(0,fileName.lastIndexOf("/"));            if(!FileUtil.isDir(filePath)){                FileUtil.makeDirs(filePath);            }            file = new File("D:\\upload\\" + fileName);            try {                file.createNewFile();                //将上传文件保存到一个目标文件中                f.transferTo(file);            } catch (IOException e) {                e.printStackTrace();            }        }        return "filelist";    }}

package cn.hadron.db.util;import java.io.*;import java.util.ArrayList;import java.util.List;import org.apache.commons.io.FileUtils;/** * 文件操作工具类 * * @author cyq * */public class FileUtil {	public static boolean isFile(String filepath) {		File f = new File(filepath);		return f.exists() && f.isFile();	}	public static boolean isDir(String dirPath) {		File f = new File(dirPath);		return f.exists() && f.isDirectory();	}	/**	 * 创建多级目录	 * @param path	 */	public static void makeDirs(String path) {		File file = new File(path);		// 如果文件夹不存在则创建		if (!file.exists() && !file.isDirectory()) {			file.mkdirs();		}else {			System.out.println("创建目录失败："+path);		}	}}

4、上传页面

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