feat: 新增图片预览接口

yuan

4 天以前 dd26c2d2a47d967ab33671a33bebc493458c16a6

 src/main/java/com/ruoyi/other/controller/TempFileController.java

@@ -1,13 +1,25 @@
package com.ruoyi.other.controller;


import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.framework.web.domain.AjaxResult;
import com.ruoyi.other.service.TempFileService;
import com.ruoyi.purchase.dto.ProductRecordDto;
import com.ruoyi.purchase.dto.TicketRegistrationDto;
import com.ruoyi.purchase.service.ITicketRegistrationService;
import com.ruoyi.purchase.service.impl.TicketRegistrationServiceImpl;
import io.swagger.annotations.ApiOperation;
import lombok.AllArgsConstructor;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;


@RestController
@@ -17,8 +29,10 @@

    private TempFileService tempFileService;

    private TicketRegistrationServiceImpl ticketRegistrationServiceImpl;

    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file, String type) {
    public AjaxResult uploadFile(MultipartFile file, Integer type) {
        try {
            return AjaxResult.success(tempFileService.uploadFile(file, type));
        } catch (Exception e) {
@@ -26,4 +40,63 @@
        }
    }

    @PostMapping("uploadFile")
    public AjaxResult uploadFile(@RequestBody ProductRecordDto productRecordDto) {
        try {
            if (!productRecordDto.getTempFileIds().isEmpty()&&productRecordDto.getTicketRegistrationId() != null) {
                ticketRegistrationServiceImpl.migrateTempFilesToFormal(productRecordDto.getTicketRegistrationId(), productRecordDto.getTempFileIds());
            }
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
        return AjaxResult.success();
    }

    /**
     * 图片预览（根据磁盘路径）
     */
    @GetMapping("/preview")
    @ApiOperation(value = "图片预览")
    public void previewImage(String url, HttpServletResponse response) {
        if (!StringUtils.hasText(url)) {
            response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
            return;
        }
        try {
            Path filePath = Paths.get(url);
            if (!Files.exists(filePath) || !Files.isRegularFile(filePath)) {
                response.setStatus(HttpServletResponse.SC_NOT_FOUND);
                return;
            }
            String filename = filePath.getFileName().toString();
            String ext = filename.contains(".") ? filename.substring(filename.lastIndexOf('.') + 1).toLowerCase() : "";
            MediaType mediaType;
            switch (ext) {
                case "png":
                    mediaType = MediaType.IMAGE_PNG;
                    break;
                case "gif":
                    mediaType = MediaType.IMAGE_GIF;
                    break;
                case "bmp":
                    mediaType = MediaType.parseMediaType("image/bmp");
                    break;
                case "webp":
                    mediaType = MediaType.parseMediaType("image/webp");
                    break;
                case "jpg":
                case "jpeg":
                    mediaType = MediaType.IMAGE_JPEG;
                    break;
                default:
                    mediaType = MediaType.APPLICATION_OCTET_STREAM;
            }
            response.setContentType(mediaType.toString());
            response.setHeader(HttpHeaders.CACHE_CONTROL, "max-age=3600");
            Files.copy(filePath, response.getOutputStream());
        } catch (IOException e) {
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        }
    }

}