之前用ssm写的

https://my.oschina.net/springMVCAndspring/blog/1821045

https://my.oschina.net/springMVCAndspring/blog/1821209

1.效果

61.springboot 附件上传-LMLPHP

61.springboot 附件上传-LMLPHP

2.实现过程

2.1 前端

      

<form method="post" action="/upload" enctype="multipart/form-data">
    <input type="file" name="file"><br>
    <input type="text" id="14a" name="name" value="zs">
    <input type="password"  id="14111a" name="password" value="22">
    <input type="submit" value="提交">
</form>

61.springboot 附件上传-LMLPHP

2.2 后台

(1) 设置上传文件大小

# 上传文件总的最大值
spring.servlet.multipart.max-request-size=1MB
# 单个文件的最大值
spring.servlet.multipart.max-file-size=1MB

61.springboot 附件上传-LMLPHP

(2) controller层

61.springboot 附件上传-LMLPHP

(3) 上传工具类

package cn.ma.mylife.utils;

import com.alibaba.fastjson.JSON;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.UUID;

/**
 * @company: 马氏集团
 * @FillName:updloadUtils
 * @author: sunshine
 * @date: 2019/11/1 20:43
 * @description:  单个文件上传及删除
 */
public class fileUtils {
    /**
     * @author: sunshine
     * @description:1.单个附件上传
     * Path:保存位置(必)
     * @date 2019/11/2 11:33
     * @param: file:文件对象(必)
     * @url:
     * @return:
     **/
    public static String uploadFile(MultipartFile file, String Path) {

        HashMap<String, Object> map = new HashMap<>();
        if (file.isEmpty()) {
            map.put("msg", "上传失败,请选择文件");
            return JSON.toJSONString(map);
        }
        //得到文件的后缀名称
        String getFilename = file.getOriginalFilename();
        int index = getFilename.lastIndexOf(".");
        char[] ch = getFilename.toCharArray();
        //根据 copyValueOf(char[] data, int offset, int count) 取得最后一个字符串
        String lastString = String.copyValueOf(ch, index + 1, ch.length - index - 1);
        String filePath = Path + UUID.randomUUID().toString().replace("-", "") + "." + lastString;
        File dest = new File(filePath);
        try {
            file.transferTo(dest);
            System.out.println("上传成功");
            map.put("msg", "success");
            map.put("url", dest);
            return JSON.toJSONString(map);
        } catch (IOException e) {
            map.put("msg", "fail!");
            System.out.println(e.getMessage());
        }
        return JSON.toJSONString(map);
    }

    /**
     * @author: sunshine
     * @description: 2.附件删除
     * @date 2019/11/2 11:32
     * @param: fileName:文件所在位置(必)
     * @url:
     * @return:
     **/
    public static boolean deleteFile(String fileName) {
        File file = new File(fileName);
        if (file.isFile() && file.exists()) {
            file.delete();
            System.out.println("删除单个文件" + fileName + "成功!");
            return true;
        } else {
            System.out.println("删除单个文件" + fileName + "失败!");
            return false;
        }
    }

}
11-02 18:28