直接上代码吧
 

package com.ydx.emms.datapro.controller;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.io.File;

/**
* @Description: 通过ip和端口直接查看图片
* @param
* @author zlw
* @date 2024/9/4 15:09
*/
@Configuration
public class TPicController implements WebMvcConfigurer {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //虚拟url路径
        registry.addResourceHandler("/file/**")
                .addResourceLocations("file:" + System.getProperty("user.dir").replace(File.separatorChar, '/') + "/file/");
        //真实本地路径
    }
}

访问：http://127.0.0.1:端口/file/1.jpg

补充：从一个文件夹移动某一个文件到另一个文件夹

@RequestMapping(value = "/moveAlarmPic")
Result moveAlarmPic(HttpServletRequest request) {
    // 获取请求参数
    Map<String, Object> params = ParamUtil.getParams(request);
    String ip = MapUtils.getString(params, "ip");
    String time = MapUtils.getString(params, "time");
    // 参数判断
    if (ParamUtil.isOneEmpty(ip, time)) {
        return new Result("rest_ACK", Result.Code.ParamError.value(), false, "参数不正确，必填参数有为空");
    } else {
        //在告警文件夹下创建指定目录
        makeDir(ip);
        //移动指定的图片
        // 源文件路径
        Path sourcePath = Paths.get(System.getProperty("user.dir") + "/pic/" + ip+"/"+time+".jpg");
        Path sourcePathCsv = Paths.get(System.getProperty("user.dir") + "/pic/" + ip+"/"+time+".csv");
        // 目标文件夹路径
        Path destinationPath = Paths.get(System.getProperty("user.dir").replace(File.separatorChar, '/') + "/file/"+ip);
        // 目标文件完整路径
        Path targetPath = destinationPath.resolve(sourcePath.getFileName());
        Path targetPathCsv = destinationPath.resolve(sourcePathCsv.getFileName());
        try {
            // 复制图片
            Files.copy(sourcePath, targetPath, StandardCopyOption.REPLACE_EXISTING);
            //复制矩阵
            Files.copy(sourcePathCsv, targetPathCsv, StandardCopyOption.REPLACE_EXISTING);
            System.out.println("文件复制成功！");
            return new Result("rest_ACK", Result.Code.Success.value(), true);
        } catch (IOException e) {
            System.out.println("文件复制失败: " + e.getMessage());
            return new Result("rest_ACK", Result.Code.Success.value(), false);
        }
    }
}

/**
 * @param
 * @Description: 指定目录下创建文件夹
 * @author zlw
 * @date 2024/7/26 14:06
 */
public void makeDir(String dirName) {
    // 指定要创建的文件夹路径
    String directoryPath = System.getProperty("user.dir").replace(File.separatorChar, '/') + "/file/"+dirName;
    // 创建File对象
    File dir = new File(directoryPath);
    // 如果文件夹不存在，则创建文件夹
    if (!dir.exists()) {
        boolean result = dir.mkdir();
        if (result) {

            System.out.println("文件夹创建成功：" + directoryPath);
        } else {
            System.out.println("文件夹创建失败：" + directoryPath);
        }
    } else {
        System.out.println("文件夹已存在：" + directoryPath);
    }
}