springboot 文件上传--静态资源映射

最新推荐文章于 2024-03-22 15:49:23 发布

junior~programmer

最新推荐文章于 2024-03-22 15:49:23 发布

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分类专栏：日常记录

本文链接：https://blog.youkuaiyun.com/qq_37724144/article/details/103685206

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记录文件上传的一些过程，慢慢记录和补充

先创建一个简单的springboot项目，勾选上web模块和lombok,创建 controller,entity,config,util四个包文件，项目结构创建完毕后如下图
在这里插入图片描述
配置文件

spring:
  servlet:
    multipart:
      #单个文件的最大值
      max-file-size: 5MB
      #上传文件的最大值
      max-request-size: 5MB
  resources:
    #增加外部静态资源目录映射
    static-locations: classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/,file:D:\File\
webvalue:
  resourcePath: D:\File\

entity中新建类读取yml中的自定义配置

package cn.ordinary.upload.entity;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * @author ordinary
 * @date 2019/12/24
 */

@Data
@Component
@ConfigurationProperties(prefix = "webvalue")
public class WebValue {
    private String resourcePath;
}

文件夹工具类

package cn.ordinary.upload.util;

import java.io.File;
import java.util.Calendar;

/**
 * @author ordinary
 * @date 2019/12/24
 */
public class FolderUtil {

    /**
     * 按照年月日的方式生成存储文件夹
     *
     * @param resourcePath 根目录
     * @return 文件夹绝对路径
     */
    public static String getSaveFolder(String resourcePath) {
        Calendar calendar = Calendar.getInstance();
        //获取月份加1  月份从0开始的
        String folder = String.format("%s\\%d\\%d\\%d\\", resourcePath, calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH) + 1, calendar.get(Calendar.DAY_OF_MONTH));
        File file = new File(folder);
        //如果文件夹不存在，先生成
        if (!file.exists()) {
            file.mkdirs();
        }
        return folder;
    }
}

文件工具类

package cn.ordinary.upload.util;

import java.io.FileOutputStream;
import java.io.IOException;

/**
 * @author ordinary
 * @date 2019/12/24
 */
public class FileUtil {

    /**
     * 字节流写入文件
     *
     * @param filePath 文件路径
     * @param data     数据
     * @throws IOException io异常
     */
    public static void writeFile(String filePath, byte[] data) throws IOException {
        FileOutputStream fileOutputStream = new FileOutputStream(filePath);
        fileOutputStream.write(data);
        fileOutputStream.flush();
        fileOutputStream.close();
    }
}

控制器

package cn.ordinary.upload.controller;

import cn.ordinary.upload.entity.WebValue;
import cn.ordinary.upload.util.FileUtil;
import cn.ordinary.upload.util.FolderUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

/**
 * @author ordinary
 * @date 2019/12/24
 */
@Controller
@RequestMapping("/upload")
public class UploadController {

    @Autowired
    private WebValue webValue;

    @ResponseBody
    @PostMapping("/file")
    public String uploadFile(HttpServletRequest servletRequest, MultipartFile file) {
        try {
            String folder = FolderUtil.getSaveFolder(webValue.getResourcePath());
            String fileName = file.getOriginalFilename();
            System.out.println(fileName);
            FileUtil.writeFile(folder + fileName, file.getBytes());
            return "success";
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
            return "failed";
        }
    }
}

上传页面

在static文件夹下新建index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form method="post" action="/upload/file" enctype="multipart/form-data">
    <input type="file" name="file">
    <input type="submit" value="上传文件">
</form>
</body>
</html>