From dde876eb26278a6f335455d29abec8a4c3b03885 Mon Sep 17 00:00:00 2001
From: caozehui <2427765068@qq.com>
Date: Thu, 23 Jul 2026 08:39:02 +0800
Subject: [PATCH] =?UTF-8?q?=E8=AE=BE=E5=A4=87=E5=9B=BE=E7=89=87?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../device/controller/PqDevController.java    |  21 +-
 .../device/mapper/mapping/PqDevMapper.xml     |   2 +-
 .../gather/device/pojo/param/PqDevParam.java  |   5 +-
 .../com/njcn/gather/device/pojo/po/PqDev.java |   4 -
 .../gather/device/pojo/vo/PqDevImageVO.java   |  17 ++
 .../njcn/gather/device/pojo/vo/PqDevVO.java   |   4 +-
 .../gather/device/service/IPqDevService.java  |   4 +-
 .../device/service/PqDevImageFileService.java | 288 ++++++++++++++++++
 .../device/service/impl/PqDevServiceImpl.java | 117 ++++---
 .../gather/device/util/PqDevImageSupport.java | 107 +++----
 .../device/util/PqDevImageSupportTest.java    | 196 ++++++++++--
 entrance/src/main/resources/application.yml   |  33 +-
 12 files changed, 636 insertions(+), 162 deletions(-)
 create mode 100644 detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevImageVO.java
 create mode 100644 detection/src/main/java/com/njcn/gather/device/service/PqDevImageFileService.java

diff --git a/detection/src/main/java/com/njcn/gather/device/controller/PqDevController.java b/detection/src/main/java/com/njcn/gather/device/controller/PqDevController.java
index f51ddd54..1130c76b 100644
--- a/detection/src/main/java/com/njcn/gather/device/controller/PqDevController.java
+++ b/detection/src/main/java/com/njcn/gather/device/controller/PqDevController.java
@@ -100,11 +100,26 @@ public class PqDevController extends BaseController {
     }
 
     @OperateInfo(info = LogEnum.BUSINESS_COMMON, operateType = OperateType.DOWNLOAD)
-    @GetMapping("/image/download")
+    @GetMapping("/image/preview")
     @ApiOperation("下载设备图片")
     @ApiImplicitParam(name = "id", value = "被检设备id", required = true)
-    public void downloadImage(@RequestParam("id") String id, HttpServletResponse response) {
-        pqDevService.downloadImage(id, response);
+    public void previewImage(@RequestParam("id") String id,
+                             @RequestParam("fileName") String fileName,
+                             HttpServletResponse response) {
+        pqDevService.previewImage(id, fileName, response);
+    }
+
+    @OperateInfo(info = LogEnum.BUSINESS_COMMON, operateType = OperateType.DOWNLOAD)
+    @GetMapping("/image/download")
+    @ApiOperation("download device image")
+    @ApiImplicitParams({
+            @ApiImplicitParam(name = "id", value = "id", required = true),
+            @ApiImplicitParam(name = "fileName", value = "fileName", required = true)
+    })
+    public void downloadImage(@RequestParam("id") String id,
+                              @RequestParam("fileName") String fileName,
+                              HttpServletResponse response) {
+        pqDevService.downloadImage(id, fileName, response);
     }
 
     @OperateInfo(operateType = OperateType.DELETE)
diff --git a/detection/src/main/java/com/njcn/gather/device/mapper/mapping/PqDevMapper.xml b/detection/src/main/java/com/njcn/gather/device/mapper/mapping/PqDevMapper.xml
index bee3f825..7508a3d0 100644
--- a/detection/src/main/java/com/njcn/gather/device/mapper/mapping/PqDevMapper.xml
+++ b/detection/src/main/java/com/njcn/gather/device/mapper/mapping/PqDevMapper.xml
@@ -154,7 +154,7 @@
     </select>
 
     <select id="selectByDevId" resultType="com.njcn.gather.device.pojo.vo.PqDevVO">
-        SELECT dev.*, dev_sub.*
+        SELECT <include refid="DevColumnsNoImage"/>, dev_sub.*
         FROM pq_dev dev
                  left JOIN pq_dev_sub dev_sub ON dev.Id = dev_sub.Dev_Id
         WHERE dev.Id = #{devId}
diff --git a/detection/src/main/java/com/njcn/gather/device/pojo/param/PqDevParam.java b/detection/src/main/java/com/njcn/gather/device/pojo/param/PqDevParam.java
index 3ca2bf22..c59f4763 100644
--- a/detection/src/main/java/com/njcn/gather/device/pojo/param/PqDevParam.java
+++ b/detection/src/main/java/com/njcn/gather/device/pojo/param/PqDevParam.java
@@ -138,7 +138,7 @@ public class PqDevParam {
     private Integer importFlag;
 
     @ApiModelProperty("设备图片")
-    private MultipartFile image;
+    private List<MultipartFile> images;
 
     /**
      * 更新操作实体
@@ -151,6 +151,9 @@ public class PqDevParam {
         @NotBlank(message = DetectionValidMessage.ID_NOT_BLANK)
         @Pattern(regexp = PatternRegex.SYSTEM_ID, message = DetectionValidMessage.ID_FORMAT_ERROR)
         private String id;
+
+        @ApiModelProperty("deleteImageNames")
+        private List<String> deleteImageNames;
     }
 
     /**
diff --git a/detection/src/main/java/com/njcn/gather/device/pojo/po/PqDev.java b/detection/src/main/java/com/njcn/gather/device/pojo/po/PqDev.java
index 0e7d156f..a2a7f21a 100644
--- a/detection/src/main/java/com/njcn/gather/device/pojo/po/PqDev.java
+++ b/detection/src/main/java/com/njcn/gather/device/pojo/po/PqDev.java
@@ -3,7 +3,6 @@ package com.njcn.gather.device.pojo.po;
 import com.baomidou.mybatisplus.annotation.FieldFill;
 import com.baomidou.mybatisplus.annotation.TableField;
 import com.baomidou.mybatisplus.annotation.TableName;
-import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
@@ -185,9 +184,6 @@ public class PqDev extends BaseEntity implements Serializable {
      */
     private Integer importFlag;
 
-    @JsonIgnore
-    private byte[] image;
-
     /**
      * 状态：0-删除 1-正常
      */
diff --git a/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevImageVO.java b/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevImageVO.java
new file mode 100644
index 00000000..3038d5cf
--- /dev/null
+++ b/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevImageVO.java
@@ -0,0 +1,17 @@
+package com.njcn.gather.device.pojo.vo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class PqDevImageVO {
+
+    private String fileName;
+
+    private String previewUrl;
+
+    private String downloadUrl;
+}
diff --git a/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevVO.java b/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevVO.java
index 20c71aff..b9a54f48 100644
--- a/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevVO.java
+++ b/detection/src/main/java/com/njcn/gather/device/pojo/vo/PqDevVO.java
@@ -150,7 +150,5 @@ public class PqDevVO extends PqDev {
 
     private Boolean hasImage;
 
-    private String imageBase64;
-
-    private String imageContentType;
+    private List<PqDevImageVO> images;
 }
diff --git a/detection/src/main/java/com/njcn/gather/device/service/IPqDevService.java b/detection/src/main/java/com/njcn/gather/device/service/IPqDevService.java
index 10f62e62..f82059be 100644
--- a/detection/src/main/java/com/njcn/gather/device/service/IPqDevService.java
+++ b/detection/src/main/java/com/njcn/gather/device/service/IPqDevService.java
@@ -102,7 +102,9 @@ public interface IPqDevService extends IService<PqDev> {
      * @param id 设备id
      * @param response 响应
      */
-    void downloadImage(String id, HttpServletResponse response);
+    void previewImage(String id, String fileName, HttpServletResponse response);
+
+    void downloadImage(String id, String fileName, HttpServletResponse response);
 
     /**
      * 获取装置信息和装置下监测点信息
diff --git a/detection/src/main/java/com/njcn/gather/device/service/PqDevImageFileService.java b/detection/src/main/java/com/njcn/gather/device/service/PqDevImageFileService.java
new file mode 100644
index 00000000..11c32c08
--- /dev/null
+++ b/detection/src/main/java/com/njcn/gather/device/service/PqDevImageFileService.java
@@ -0,0 +1,288 @@
+package com.njcn.gather.device.service;
+
+import com.njcn.gather.device.pojo.vo.PqDevImageVO;
+import com.njcn.gather.device.util.PqDevImageSupport;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.UUID;
+import java.util.regex.Pattern;
+import java.util.stream.Stream;
+
+@Service
+public class PqDevImageFileService {
+
+    public static final int MAX_IMAGE_COUNT = 5;
+
+    private static final Pattern UUID_JPG_FILE_NAME = Pattern.compile(
+            "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\\.jpg$"
+    );
+    private static final Pattern DEVICE_ID_PATTERN = Pattern.compile("^[A-Za-z0-9_-]{1,64}$");
+    private static final String INVALID_IMAGE_NAME = "图片文件名无效";
+    private static final String INVALID_IMAGE_PATH = "图片路径无效";
+    private static final String INVALID_DEVICE_ID = "设备ID无效";
+    private static final String IMAGE_NOT_EXISTS = "设备图片不存在";
+    private static final String IMAGE_COUNT_EXCEEDED = "设备图片最多上传5张";
+    private static final String READ_IMAGE_FAILED = "读取设备图片失败";
+    private static final String PREVIEW_URL = "/pqDev/image/preview?id=%s&fileName=%s";
+    private static final String DOWNLOAD_URL = "/pqDev/image/download?id=%s&fileName=%s";
+
+    private final String imageDir;
+
+    public PqDevImageFileService(@Value("${device.image.dir:}") String imageDir) {
+        this.imageDir = imageDir;
+    }
+
+    public List<PqDevImageVO> listImages(String devId) {
+        Path deviceDir = deviceDir(devId);
+        if (!Files.isDirectory(deviceDir)) {
+            return Collections.emptyList();
+        }
+
+        List<Path> imagePaths = new ArrayList<>();
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(deviceDir)) {
+            for (Path path : stream) {
+                if (Files.isRegularFile(path) && isValidImageFileName(path.getFileName().toString())) {
+                    imagePaths.add(path);
+                }
+            }
+        } catch (IOException ex) {
+            throw new IllegalStateException(READ_IMAGE_FAILED, ex);
+        }
+
+        Collections.sort(imagePaths, new Comparator<Path>() {
+            @Override
+            public int compare(Path left, Path right) {
+                int modifiedCompare = Long.compare(lastModified(left), lastModified(right));
+                if (modifiedCompare != 0) {
+                    return modifiedCompare;
+                }
+                return left.getFileName().toString().compareTo(right.getFileName().toString());
+            }
+        });
+
+        List<PqDevImageVO> images = new ArrayList<>();
+        for (Path imagePath : imagePaths) {
+            images.add(buildImageVO(devId, imagePath.getFileName().toString()));
+        }
+        return images;
+    }
+
+    public void validateAddCount(List<MultipartFile> newImages) {
+        if (effectiveNewImageCount(newImages) > MAX_IMAGE_COUNT) {
+            throw new IllegalArgumentException(IMAGE_COUNT_EXCEEDED);
+        }
+    }
+
+    public void validateFinalCount(String devId, List<String> deleteImageNames, List<MultipartFile> newImages) {
+        validateAddCount(newImages);
+        Set<String> existingNames = currentImageNameSet(devId);
+        validateExistingImageNames(devId, deleteImageNames);
+
+        int finalCount = existingNames.size() - uniqueCount(deleteImageNames) + effectiveNewImageCount(newImages);
+        if (finalCount > MAX_IMAGE_COUNT) {
+            throw new IllegalArgumentException(IMAGE_COUNT_EXCEEDED);
+        }
+    }
+
+    public List<PqDevImageVO> saveImages(String devId, List<MultipartFile> newImages) throws IOException {
+        validateAddCount(newImages);
+        if (newImages == null || newImages.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        Files.createDirectories(deviceDir(devId));
+        List<PqDevImageVO> savedImages = new ArrayList<>();
+        for (MultipartFile image : newImages) {
+            if (image == null || image.isEmpty()) {
+                continue;
+            }
+            String fileName = UUID.randomUUID().toString().toLowerCase(Locale.ROOT) + ".jpg";
+            Path path = imagePath(devId, fileName);
+            writeImage(path, PqDevImageSupport.processUploadToJpeg(image));
+            savedImages.add(buildImageVO(devId, fileName));
+        }
+        return savedImages;
+    }
+
+    public void deleteImages(String devId, List<String> deleteImageNames) throws IOException {
+        validateExistingImageNames(devId, deleteImageNames);
+        if (deleteImageNames == null || deleteImageNames.isEmpty()) {
+            return;
+        }
+        Set<String> deletedNames = new HashSet<>();
+        for (String fileName : deleteImageNames) {
+            if (deletedNames.add(fileName)) {
+                Files.delete(imagePath(devId, fileName));
+            }
+        }
+    }
+
+    public void validateImageNames(List<String> imageNames) {
+        if (imageNames == null) {
+            return;
+        }
+        for (String imageName : imageNames) {
+            if (!isValidImageFileName(imageName)) {
+                throw new IllegalArgumentException(INVALID_IMAGE_NAME);
+            }
+        }
+    }
+
+    public void validateExistingImageNames(String devId, List<String> imageNames) {
+        validateImageNames(imageNames);
+        if (imageNames == null || imageNames.isEmpty()) {
+            return;
+        }
+        Set<String> existingNames = currentImageNameSet(devId);
+        for (String imageName : imageNames) {
+            if (!existingNames.contains(imageName)) {
+                throw new IllegalArgumentException(IMAGE_NOT_EXISTS);
+            }
+        }
+    }
+
+    public Path imagePath(String devId, String fileName) {
+        if (!isValidImageFileName(fileName)) {
+            throw new IllegalArgumentException(INVALID_IMAGE_NAME);
+        }
+        Path deviceDir = deviceDir(devId);
+        Path path = deviceDir.resolve(fileName).normalize();
+        if (!path.startsWith(deviceDir)) {
+            throw new IllegalArgumentException(INVALID_IMAGE_PATH);
+        }
+        return path;
+    }
+
+    public long imageSize(String devId, String fileName) throws IOException {
+        Path path = imagePath(devId, fileName);
+        if (!Files.isRegularFile(path)) {
+            throw new IllegalArgumentException(IMAGE_NOT_EXISTS);
+        }
+        return Files.size(path);
+    }
+
+    public void writeImage(String devId, String fileName, OutputStream outputStream) throws IOException {
+        Path path = imagePath(devId, fileName);
+        if (!Files.isRegularFile(path)) {
+            throw new IllegalArgumentException(IMAGE_NOT_EXISTS);
+        }
+        Files.copy(path, outputStream);
+    }
+
+    public void deleteDeviceDirectoryQuietly(String devId) {
+        Path deviceDir = deviceDir(devId);
+        if (!Files.exists(deviceDir)) {
+            return;
+        }
+        try (Stream<Path> stream = Files.walk(deviceDir)) {
+            List<Path> paths = new ArrayList<>();
+            Iterator<Path> iterator = stream.iterator();
+            while (iterator.hasNext()) {
+                paths.add(iterator.next());
+            }
+            Collections.sort(paths, new Comparator<Path>() {
+                @Override
+                public int compare(Path left, Path right) {
+                    return right.compareTo(left);
+                }
+            });
+            for (Path path : paths) {
+                Files.deleteIfExists(path);
+            }
+        } catch (IOException ignored) {
+        }
+    }
+
+    private void writeImage(Path imagePath, byte[] imageBytes) throws IOException {
+        Files.createDirectories(imagePath.getParent());
+        Files.write(imagePath, imageBytes, StandardOpenOption.CREATE_NEW);
+    }
+
+    private Path rootDir() {
+        Path root;
+        if (StringUtils.hasText(imageDir)) {
+            root = Paths.get(imageDir);
+        } else {
+            root = Paths.get(System.getProperty("user.dir"), "data", "device-images");
+        }
+        return root.toAbsolutePath().normalize();
+    }
+
+    private Path deviceDir(String devId) {
+        if (!StringUtils.hasText(devId) || !DEVICE_ID_PATTERN.matcher(devId).matches()) {
+            throw new IllegalArgumentException(INVALID_DEVICE_ID);
+        }
+        Path rootDir = rootDir();
+        Path deviceDir = rootDir.resolve(devId).normalize();
+        if (!deviceDir.startsWith(rootDir)) {
+            throw new IllegalArgumentException(INVALID_IMAGE_PATH);
+        }
+        return deviceDir;
+    }
+
+    private PqDevImageVO buildImageVO(String devId, String fileName) {
+        return new PqDevImageVO(
+                fileName,
+                String.format(PREVIEW_URL, devId, fileName),
+                String.format(DOWNLOAD_URL, devId, fileName)
+        );
+    }
+
+    private Set<String> currentImageNameSet(String devId) {
+        Set<String> names = new HashSet<>();
+        for (PqDevImageVO image : listImages(devId)) {
+            names.add(image.getFileName());
+        }
+        return names;
+    }
+
+    private int effectiveNewImageCount(List<MultipartFile> newImages) {
+        if (newImages == null || newImages.isEmpty()) {
+            return 0;
+        }
+        int count = 0;
+        for (MultipartFile image : newImages) {
+            if (image != null && !image.isEmpty()) {
+                count++;
+            }
+        }
+        return count;
+    }
+
+    private int uniqueCount(List<String> names) {
+        if (names == null || names.isEmpty()) {
+            return 0;
+        }
+        return new HashSet<>(names).size();
+    }
+
+    private boolean isValidImageFileName(String fileName) {
+        return fileName != null && UUID_JPG_FILE_NAME.matcher(fileName).matches();
+    }
+
+    private long lastModified(Path path) {
+        try {
+            return Files.getLastModifiedTime(path).toMillis();
+        } catch (IOException ex) {
+            return 0L;
+        }
+    }
+}
diff --git a/detection/src/main/java/com/njcn/gather/device/service/impl/PqDevServiceImpl.java b/detection/src/main/java/com/njcn/gather/device/service/impl/PqDevServiceImpl.java
index 47a80508..351f058a 100644
--- a/detection/src/main/java/com/njcn/gather/device/service/impl/PqDevServiceImpl.java
+++ b/detection/src/main/java/com/njcn/gather/device/service/impl/PqDevServiceImpl.java
@@ -38,7 +38,7 @@ import com.njcn.gather.device.pojo.po.PqDevSub;
 import com.njcn.gather.device.pojo.vo.*;
 import com.njcn.gather.device.service.IPqDevService;
 import com.njcn.gather.device.service.IPqDevSubService;
-import com.njcn.gather.device.util.PqDevImageSupport;
+import com.njcn.gather.device.service.PqDevImageFileService;
 import com.njcn.gather.monitor.pojo.po.PqMonitor;
 import com.njcn.gather.monitor.pojo.vo.PqMonitorExcel;
 import com.njcn.gather.monitor.service.IPqMonitorService;
@@ -100,6 +100,7 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
     private final AdPlanMapper adPlanMapper;
     private final IPqDevCheckHistoryService pqDevCheckHistoryService;
     private final RestTemplateUtil restTemplateUtil;
+    private final PqDevImageFileService pqDevImageFileService;
 
     @Override
     public Page<PqDevVO> listPqDevs(PqDevParam.QueryParam queryParam) {
@@ -139,10 +140,10 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
         pqDevParam.setName(pqDevParam.getName().trim());
         pqDevParam.setCreateId(pqDevParam.getCreateId().trim());
         this.checkRepeat(pqDevParam, false);
+        validateAddImages(pqDevParam.getImages());
 
         PqDev pqDev = new PqDev();
-        BeanUtil.copyProperties(pqDevParam, pqDev, CopyOptions.create().setIgnoreProperties("image"));
-        fillImage(pqDev, pqDevParam);
+        BeanUtil.copyProperties(pqDevParam, pqDev, CopyOptions.create().setIgnoreProperties("images"));
         String currrentScene = sysTestConfigService.getCurrrentScene();
         this.checkParams(pqDev, currrentScene);
 
@@ -170,19 +171,49 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
         pqDev.setImportFlag(0);
         pqDev.setState(DataStateEnum.ENABLE.getCode());
         pqDevSubService.save(pqDevSub);
-        return this.save(pqDev);
+        boolean saved = this.save(pqDev);
+        if (saved) {
+            saveAddImages(id, pqDevParam.getImages());
+        }
+        return saved;
     }
 
-    private void fillImage(PqDev pqDev, PqDevParam pqDevParam) {
+    private void validateAddImages(List<MultipartFile> images) {
         try {
-            byte[] image = PqDevImageSupport.processUpload(pqDevParam.getImage());
-            if (image != null) {
-                pqDev.setImage(image);
-            }
+            pqDevImageFileService.validateAddCount(images);
+        } catch (IllegalArgumentException e) {
+            throw new BusinessException(CommonResponseEnum.FAIL, e.getMessage());
+        }
+    }
+
+    private void saveAddImages(String id, List<MultipartFile> images) {
+        try {
+            pqDevImageFileService.saveImages(id, images);
+        } catch (IllegalArgumentException e) {
+            pqDevImageFileService.deleteDeviceDirectoryQuietly(id);
+            throw new BusinessException(CommonResponseEnum.FAIL, e.getMessage());
+        } catch (IOException e) {
+            pqDevImageFileService.deleteDeviceDirectoryQuietly(id);
+            throw new BusinessException(CommonResponseEnum.FAIL, "device image save failed");
+        }
+    }
+
+    private void validateUpdateImages(PqDevParam.UpdateParam updateParam) {
+        try {
+            pqDevImageFileService.validateFinalCount(updateParam.getId(), updateParam.getDeleteImageNames(), updateParam.getImages());
+        } catch (IllegalArgumentException e) {
+            throw new BusinessException(CommonResponseEnum.FAIL, e.getMessage());
+        }
+    }
+
+    private void saveUpdateImages(PqDevParam.UpdateParam updateParam) {
+        try {
+            pqDevImageFileService.saveImages(updateParam.getId(), updateParam.getImages());
+            pqDevImageFileService.deleteImages(updateParam.getId(), updateParam.getDeleteImageNames());
         } catch (IllegalArgumentException e) {
             throw new BusinessException(CommonResponseEnum.FAIL, e.getMessage());
         } catch (IOException e) {
-            throw new BusinessException(CommonResponseEnum.FAIL, "图片处理失败");
+            throw new BusinessException(CommonResponseEnum.FAIL, "device image save failed");
         }
     }
 
@@ -226,10 +257,10 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
         updateParam.setName(updateParam.getName().trim());
         updateParam.setCreateId(updateParam.getCreateId().trim());
         this.checkRepeat(updateParam, true);
+        validateUpdateImages(updateParam);
 
         PqDev pqDev = new PqDev();
-        BeanUtil.copyProperties(updateParam, pqDev, CopyOptions.create().setIgnoreProperties("image"));
-        fillImage(pqDev, updateParam);
+        BeanUtil.copyProperties(updateParam, pqDev, CopyOptions.create().setIgnoreProperties("images", "deleteImageNames"));
         String currrentScene = sysTestConfigService.getCurrrentScene();
         this.checkParams(pqDev, currrentScene);
 
@@ -237,7 +268,11 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
         if (PatternEnum.CONTRAST.getValue().equals(dictDataService.getDictDataById(updateParam.getPattern()).getCode())) {
             pqMonitorService.updatePqMonitorByDevId(updateParam.getId(), updateParam.getMonitorList());
         }
-        return this.updateById(pqDev);
+        boolean updated = this.updateById(pqDev);
+        if (updated) {
+            saveUpdateImages(updateParam);
+        }
+        return updated;
     }
 
     @Override
@@ -282,7 +317,13 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
                 throw new BusinessException(DetectionResponseEnum.DEVICE_DELETE, str.toString());
             }
             pqDevSubService.remove(new QueryWrapper<PqDevSub>().lambda().in(PqDevSub::getDevId, param.getIds()));
-            return this.lambdaUpdate().set(PqDev::getState, DataStateEnum.DELETED.getCode()).in(PqDev::getId, param.getIds()).update();
+            boolean deleted = this.lambdaUpdate().set(PqDev::getState, DataStateEnum.DELETED.getCode()).in(PqDev::getId, param.getIds()).update();
+            if (deleted) {
+                for (String id : param.getIds()) {
+                    pqDevImageFileService.deleteDeviceDirectoryQuietly(id);
+                }
+            }
+            return deleted;
         }
         return true;
     }
@@ -399,7 +440,7 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
         if (ObjectUtil.isNull(pqDevVO)) {
             return null;
         }
-        setImageEchoFields(pqDevVO);
+        setImageListFields(pqDevVO);
         if (StrUtil.isNotBlank(pqDevVO.getSeries())) {
             pqDevVO.setSeries(EncryptionUtil.decoderString(1, pqDevVO.getSeries()));
         }
@@ -429,36 +470,38 @@ public class PqDevServiceImpl extends ServiceImpl<PqDevMapper, PqDev> implements
     }
 
     @Override
-    public void downloadImage(String id, HttpServletResponse response) {
-        PqDev pqDev = this.getById(id);
-        if (ObjectUtil.isNull(pqDev) || pqDev.getImage() == null || pqDev.getImage().length == 0) {
-            throw new BusinessException(CommonResponseEnum.FAIL, "设备图片不存在");
-        }
-        String contentType = PqDevImageSupport.detectContentType(pqDev.getImage());
-        String filename = "device-image-" + id + "." + PqDevImageSupport.getExtension(contentType);
-        response.setContentType(contentType);
-        response.setContentLength(pqDev.getImage().length);
-        response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");
-        try {
-            response.getOutputStream().write(pqDev.getImage());
-            response.flushBuffer();
-        } catch (IOException e) {
-            throw new BusinessException(CommonResponseEnum.FAIL, "设备图片下载失败");
-        }
+    public void previewImage(String id, String fileName, HttpServletResponse response) {
+        writeDeviceImage(id, fileName, response, "inline");
     }
 
-    private void setImageEchoFields(PqDevVO pqDevVO) {
+    @Override
+    public void downloadImage(String id, String fileName, HttpServletResponse response) {
+        writeDeviceImage(id, fileName, response, "attachment");
+    }
+
+    private void writeDeviceImage(String id, String fileName, HttpServletResponse response, String disposition) {
+        PqDev pqDev = this.getById(id);
+        if (ObjectUtil.isNull(pqDev)) {
+            throw new BusinessException(CommonResponseEnum.FAIL, "device not found");
+        }
         try {
-            PqDevImageSupport.ImageEchoPayload payload = PqDevImageSupport.buildEchoPayload(pqDevVO.getImage());
-            pqDevVO.setHasImage(payload.isHasImage());
-            pqDevVO.setImageBase64(payload.getImageBase64());
-            pqDevVO.setImageContentType(payload.getImageContentType());
-            pqDevVO.setImage(null);
+            response.setContentType("image/jpeg");
+            response.setContentLength((int) pqDevImageFileService.imageSize(id, fileName));
+            response.setHeader("Content-Disposition", disposition + "; filename=\"" + fileName + "\"");
+            pqDevImageFileService.writeImage(id, fileName, response.getOutputStream());
+            response.flushBuffer();
         } catch (IllegalArgumentException e) {
             throw new BusinessException(CommonResponseEnum.FAIL, e.getMessage());
+        } catch (IOException e) {
+            throw new BusinessException(CommonResponseEnum.FAIL, "device image output failed");
         }
     }
 
+    private void setImageListFields(PqDevVO pqDevVO) {
+        List<PqDevImageVO> images = pqDevImageFileService.listImages(pqDevVO.getId());
+        pqDevVO.setImages(images);
+        pqDevVO.setHasImage(CollUtil.isNotEmpty(images));
+    }
 
     /**
      * 获取查询条件wrapper
diff --git a/detection/src/main/java/com/njcn/gather/device/util/PqDevImageSupport.java b/detection/src/main/java/com/njcn/gather/device/util/PqDevImageSupport.java
index aa29074e..38022285 100644
--- a/detection/src/main/java/com/njcn/gather/device/util/PqDevImageSupport.java
+++ b/detection/src/main/java/com/njcn/gather/device/util/PqDevImageSupport.java
@@ -1,7 +1,5 @@
 package com.njcn.gather.device.util;
 
-import lombok.AllArgsConstructor;
-import lombok.Data;
 import org.springframework.web.multipart.MultipartFile;
 
 import javax.imageio.IIOImage;
@@ -9,35 +7,53 @@ import javax.imageio.ImageIO;
 import javax.imageio.ImageWriteParam;
 import javax.imageio.ImageWriter;
 import javax.imageio.stream.ImageOutputStream;
+import java.awt.Color;
 import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
-import java.util.Base64;
 import java.util.Iterator;
 import java.util.Locale;
 
 public final class PqDevImageSupport {
 
-    private static final long MAX_FILE_SIZE = 10L * 1024L * 1024L;
-    private static final int MAX_EDGE = 1600;
+    public static final long MAX_FILE_SIZE = 10L * 1024L * 1024L;
+    public static final int MAX_EDGE = 1600;
+    private static final String INVALID_IMAGE_CONTENT = "图片内容无效";
+    private static final String UNSUPPORTED_IMAGE_TYPE = "仅支持 JPG、JPEG、PNG 图片";
+    private static final String IMAGE_TOO_LARGE = "图片大小不能超过 10MB";
     private static final float JPEG_QUALITY = 0.82f;
 
     private PqDevImageSupport() {
     }
 
-    public static ImageEchoPayload buildEchoPayload(byte[] imageBytes) {
-        if (imageBytes == null || imageBytes.length == 0) {
-            return new ImageEchoPayload(false, null, null);
+    public static byte[] processUploadToJpeg(MultipartFile image) throws IOException {
+        if (image == null || image.isEmpty()) {
+            throw new IllegalArgumentException(INVALID_IMAGE_CONTENT);
         }
-        return new ImageEchoPayload(true, Base64.getEncoder().encodeToString(imageBytes), detectContentType(imageBytes));
+        if (image.getSize() > MAX_FILE_SIZE) {
+            throw new IllegalArgumentException(IMAGE_TOO_LARGE);
+        }
+        if (!hasAllowedDeclaredType(image)) {
+            throw new IllegalArgumentException(UNSUPPORTED_IMAGE_TYPE);
+        }
+
+        byte[] originalBytes = image.getBytes();
+        detectContentType(originalBytes);
+
+        BufferedImage source = ImageIO.read(new ByteArrayInputStream(originalBytes));
+        if (source == null) {
+            throw new IllegalArgumentException(INVALID_IMAGE_CONTENT);
+        }
+
+        return writeJpeg(scaleIfNeeded(source));
     }
 
     public static String detectContentType(byte[] imageBytes) {
         if (imageBytes == null || imageBytes.length < 4) {
-            throw new IllegalArgumentException("图片内容无效");
+            throw new IllegalArgumentException(INVALID_IMAGE_CONTENT);
         }
         if (isPng(imageBytes)) {
             return "image/png";
@@ -45,47 +61,31 @@ public final class PqDevImageSupport {
         if (isJpeg(imageBytes)) {
             return "image/jpeg";
         }
-        throw new IllegalArgumentException("仅支持 JPG、PNG 图片");
+        throw new IllegalArgumentException(UNSUPPORTED_IMAGE_TYPE);
     }
 
-    public static byte[] processUpload(MultipartFile image) throws IOException {
-        if (image == null || image.isEmpty()) {
-            return null;
-        }
-        if (image.getSize() > MAX_FILE_SIZE) {
-            throw new IllegalArgumentException("图片大小不能超过 10MB");
-        }
-
+    private static boolean hasAllowedDeclaredType(MultipartFile image) {
         String normalizedName = normalize(image.getOriginalFilename());
         String normalizedContentType = normalize(image.getContentType());
-        boolean allowedType = normalizedContentType.equals("image/jpeg")
-                || normalizedContentType.equals("image/png")
-                || normalizedName.endsWith(".jpg")
+        boolean hasContentType = !normalizedContentType.isEmpty();
+        boolean hasKnownExtension = normalizedName.endsWith(".jpg")
+                || normalizedName.endsWith(".jpeg")
+                || normalizedName.endsWith(".png")
+                || normalizedName.matches(".*\\.[^.]+$");
+        boolean contentTypeAllowed = normalizedContentType.equals("image/jpeg")
+                || normalizedContentType.equals("image/jpg")
+                || normalizedContentType.equals("image/png");
+        boolean extensionAllowed = normalizedName.endsWith(".jpg")
                 || normalizedName.endsWith(".jpeg")
                 || normalizedName.endsWith(".png");
-        if (!allowedType) {
-            throw new IllegalArgumentException("仅支持 JPG、PNG 图片");
-        }
 
-        byte[] originalBytes = image.getBytes();
-        String contentType = detectContentType(originalBytes);
-        BufferedImage source;
-        try (InputStream inputStream = image.getInputStream()) {
-            source = ImageIO.read(inputStream);
+        if (hasContentType && !contentTypeAllowed) {
+            return false;
         }
-        if (source == null) {
-            throw new IllegalArgumentException("图片内容无效");
+        if (hasKnownExtension && !extensionAllowed) {
+            return false;
         }
-
-        BufferedImage target = scaleIfNeeded(source);
-        if ("image/png".equals(contentType)) {
-            return writePng(target);
-        }
-        return writeJpeg(target);
-    }
-
-    public static String getExtension(String contentType) {
-        return "image/png".equals(contentType) ? "png" : "jpg";
+        return contentTypeAllowed || extensionAllowed;
     }
 
     private static BufferedImage scaleIfNeeded(BufferedImage source) {
@@ -99,8 +99,7 @@ public final class PqDevImageSupport {
         double scale = (double) MAX_EDGE / max;
         int targetWidth = Math.max(1, (int) Math.round(width * scale));
         int targetHeight = Math.max(1, (int) Math.round(height * scale));
-        int type = source.getType() == BufferedImage.TYPE_CUSTOM ? BufferedImage.TYPE_INT_ARGB : source.getType();
-        BufferedImage target = new BufferedImage(targetWidth, targetHeight, type);
+        BufferedImage target = new BufferedImage(targetWidth, targetHeight, BufferedImage.TYPE_INT_ARGB);
         Graphics2D graphics = target.createGraphics();
         try {
             graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
@@ -113,16 +112,12 @@ public final class PqDevImageSupport {
         return target;
     }
 
-    private static byte[] writePng(BufferedImage image) throws IOException {
-        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
-        ImageIO.write(image, "png", outputStream);
-        return outputStream.toByteArray();
-    }
-
     private static byte[] writeJpeg(BufferedImage image) throws IOException {
         BufferedImage rgbImage = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
         Graphics2D graphics = rgbImage.createGraphics();
         try {
+            graphics.setColor(Color.WHITE);
+            graphics.fillRect(0, 0, image.getWidth(), image.getHeight());
             graphics.drawImage(image, 0, 0, null);
         } finally {
             graphics.dispose();
@@ -130,7 +125,7 @@ public final class PqDevImageSupport {
 
         Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg");
         if (!writers.hasNext()) {
-            throw new IOException("未找到 JPG 图片编码器");
+            throw new IOException("JPG image writer not found");
         }
         ImageWriter writer = writers.next();
         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
@@ -170,12 +165,4 @@ public final class PqDevImageSupport {
     private static String normalize(String value) {
         return value == null ? "" : value.toLowerCase(Locale.ROOT);
     }
-
-    @Data
-    @AllArgsConstructor
-    public static class ImageEchoPayload {
-        private boolean hasImage;
-        private String imageBase64;
-        private String imageContentType;
-    }
 }
diff --git a/detection/src/test/java/com/njcn/gather/device/util/PqDevImageSupportTest.java b/detection/src/test/java/com/njcn/gather/device/util/PqDevImageSupportTest.java
index bc3cc366..12995378 100644
--- a/detection/src/test/java/com/njcn/gather/device/util/PqDevImageSupportTest.java
+++ b/detection/src/test/java/com/njcn/gather/device/util/PqDevImageSupportTest.java
@@ -1,55 +1,203 @@
 package com.njcn.gather.device.util;
 
 import org.junit.Test;
+import org.springframework.mock.web.MockMultipartFile;
 
 import javax.imageio.ImageIO;
 import java.awt.Color;
+import java.awt.Graphics2D;
 import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
 public class PqDevImageSupportTest {
 
-    @Test
-    public void buildEchoPayloadReturnsEmptyFieldsWhenImageMissing() {
-        PqDevImageSupport.ImageEchoPayload payload = PqDevImageSupport.buildEchoPayload(null);
+    private static final String INVALID_IMAGE_CONTENT = "图片内容无效";
+    private static final String UNSUPPORTED_IMAGE_TYPE = "仅支持 JPG、JPEG、PNG 图片";
+    private static final String IMAGE_TOO_LARGE = "图片大小不能超过 10MB";
 
-        assertFalse(payload.isHasImage());
-        assertNull(payload.getImageBase64());
-        assertNull(payload.getImageContentType());
+    @Test
+    public void processUploadConvertsPngToJpeg() throws Exception {
+        byte[] pngBytes = createImageBytes("png", 16, 10, BufferedImage.TYPE_INT_ARGB);
+        MockMultipartFile image = new MockMultipartFile("image", "test.png", "image/png", pngBytes);
+
+        byte[] result = PqDevImageSupport.processUploadToJpeg(image);
+
+        assertEquals("image/jpeg", PqDevImageSupport.detectContentType(result));
+        BufferedImage decoded = ImageIO.read(new ByteArrayInputStream(result));
+        assertNotNull(decoded);
+        assertEquals(16, decoded.getWidth());
+        assertEquals(10, decoded.getHeight());
     }
 
     @Test
-    public void buildEchoPayloadDetectsPngAndCreatesBase64() throws Exception {
-        byte[] imageBytes = createImageBytes("png");
+    public void processUploadConvertsTransparentPngToWhiteJpegBackground() throws Exception {
+        byte[] pngBytes = createTransparentImageBytes();
+        MockMultipartFile image = new MockMultipartFile("image", "transparent.png", "image/png", pngBytes);
 
-        PqDevImageSupport.ImageEchoPayload payload = PqDevImageSupport.buildEchoPayload(imageBytes);
+        byte[] result = PqDevImageSupport.processUploadToJpeg(image);
 
-        assertTrue(payload.isHasImage());
-        assertEquals("image/png", payload.getImageContentType());
-        assertNotNull(payload.getImageBase64());
-        assertFalse(payload.getImageBase64().isEmpty());
+        BufferedImage decoded = ImageIO.read(new ByteArrayInputStream(result));
+        assertNotNull(decoded);
+        Color background = new Color(decoded.getRGB(0, 0));
+        assertTrue(background.getRed() >= 245);
+        assertTrue(background.getGreen() >= 245);
+        assertTrue(background.getBlue() >= 245);
     }
 
-    @Test(expected = IllegalArgumentException.class)
+    @Test
+    public void processUploadKeepsJpegReadable() throws Exception {
+        byte[] jpegBytes = createImageBytes("jpg", 12, 8, BufferedImage.TYPE_INT_RGB);
+        MockMultipartFile image = new MockMultipartFile("image", "test.jpeg", "image/jpeg", jpegBytes);
+
+        byte[] result = PqDevImageSupport.processUploadToJpeg(image);
+
+        assertEquals("image/jpeg", PqDevImageSupport.detectContentType(result));
+        BufferedImage decoded = ImageIO.read(new ByteArrayInputStream(result));
+        assertNotNull(decoded);
+        assertEquals(12, decoded.getWidth());
+        assertEquals(8, decoded.getHeight());
+    }
+
+    @Test
+    public void processUploadRejectsInvalidBytes() throws Exception {
+        MockMultipartFile image = new MockMultipartFile("image", "test.png", "image/png", new byte[]{1, 2, 3});
+
+        assertIllegalArgumentMessage(INVALID_IMAGE_CONTENT, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadRejectsNullImage() {
+        assertIllegalArgumentMessage(INVALID_IMAGE_CONTENT, () -> PqDevImageSupport.processUploadToJpeg(null));
+    }
+
+    @Test
+    public void processUploadRejectsEmptyImage() {
+        MockMultipartFile image = new MockMultipartFile("image", "empty.png", "image/png", new byte[0]);
+
+        assertIllegalArgumentMessage(INVALID_IMAGE_CONTENT, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadRejectsOversizedImage() {
+        MockMultipartFile image = new MockMultipartFile(
+                "image",
+                "large.jpg",
+                "image/jpeg",
+                new byte[(int) PqDevImageSupport.MAX_FILE_SIZE + 1]
+        );
+
+        assertIllegalArgumentMessage(IMAGE_TOO_LARGE, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadRejectsUnsupportedType() throws Exception {
+        byte[] pngBytes = createImageBytes("png", 2, 2, BufferedImage.TYPE_INT_RGB);
+        MockMultipartFile image = new MockMultipartFile("image", "test.gif", "image/gif", pngBytes);
+
+        assertIllegalArgumentMessage(UNSUPPORTED_IMAGE_TYPE, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadRejectsUnsupportedContentTypeEvenWithAllowedFileName() throws Exception {
+        byte[] pngBytes = createImageBytes("png", 2, 2, BufferedImage.TYPE_INT_RGB);
+        MockMultipartFile image = new MockMultipartFile("image", "test.png", "image/gif", pngBytes);
+
+        assertIllegalArgumentMessage(UNSUPPORTED_IMAGE_TYPE, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadRejectsUnsupportedFileNameEvenWithAllowedContentType() throws Exception {
+        byte[] pngBytes = createImageBytes("png", 2, 2, BufferedImage.TYPE_INT_RGB);
+        MockMultipartFile image = new MockMultipartFile("image", "test.gif", "image/png", pngBytes);
+
+        assertIllegalArgumentMessage(UNSUPPORTED_IMAGE_TYPE, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadRejectsUnsupportedImageBytes() throws Exception {
+        byte[] gifBytes = new byte[]{0x47, 0x49, 0x46, 0x38, 0x39, 0x61};
+        MockMultipartFile image = new MockMultipartFile("image", "test.png", "image/png", gifBytes);
+
+        assertIllegalArgumentMessage(UNSUPPORTED_IMAGE_TYPE, () -> PqDevImageSupport.processUploadToJpeg(image));
+    }
+
+    @Test
+    public void processUploadScalesLargeImage() throws Exception {
+        byte[] jpegBytes = createImageBytes("jpg", 3200, 1200, BufferedImage.TYPE_INT_RGB);
+        MockMultipartFile image = new MockMultipartFile("image", "large.jpg", "image/jpeg", jpegBytes);
+
+        byte[] result = PqDevImageSupport.processUploadToJpeg(image);
+
+        BufferedImage decoded = ImageIO.read(new ByteArrayInputStream(result));
+        assertNotNull(decoded);
+        assertEquals(PqDevImageSupport.MAX_EDGE, Math.max(decoded.getWidth(), decoded.getHeight()));
+        assertEquals(1600, decoded.getWidth());
+        assertEquals(600, decoded.getHeight());
+    }
+
+    @Test
     public void detectContentTypeRejectsInvalidImageBytes() {
-        PqDevImageSupport.detectContentType(new byte[]{1, 2, 3, 4});
+        assertIllegalArgumentMessage(INVALID_IMAGE_CONTENT, () -> PqDevImageSupport.detectContentType(new byte[]{1, 2, 3}));
     }
 
-    private byte[] createImageBytes(String format) throws Exception {
-        BufferedImage image = new BufferedImage(2, 2, BufferedImage.TYPE_INT_RGB);
-        image.setRGB(0, 0, Color.RED.getRGB());
-        image.setRGB(1, 0, Color.GREEN.getRGB());
-        image.setRGB(0, 1, Color.BLUE.getRGB());
-        image.setRGB(1, 1, Color.WHITE.getRGB());
+    @Test
+    public void detectContentTypeRejectsUnsupportedImageBytes() {
+        assertIllegalArgumentMessage(UNSUPPORTED_IMAGE_TYPE, () -> PqDevImageSupport.detectContentType(new byte[]{1, 2, 3, 4}));
+    }
+
+    private byte[] createImageBytes(String format, int width, int height, int type) throws Exception {
+        BufferedImage image = new BufferedImage(width, height, type);
+        Graphics2D graphics = image.createGraphics();
+        try {
+            graphics.setColor(new Color(255, 0, 0, type == BufferedImage.TYPE_INT_ARGB ? 120 : 255));
+            graphics.fillRect(0, 0, width, height);
+            graphics.setColor(Color.BLUE);
+            graphics.fillRect(width / 2, height / 2, Math.max(1, width / 2), Math.max(1, height / 2));
+        } finally {
+            graphics.dispose();
+        }
 
         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
-        ImageIO.write(image, format, outputStream);
+        assertTrue(ImageIO.write(image, format, outputStream));
         return outputStream.toByteArray();
     }
+
+    private byte[] createTransparentImageBytes() throws Exception {
+        BufferedImage image = new BufferedImage(4, 4, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D graphics = image.createGraphics();
+        try {
+            graphics.setComposite(java.awt.AlphaComposite.Clear);
+            graphics.fillRect(0, 0, image.getWidth(), image.getHeight());
+            graphics.setComposite(java.awt.AlphaComposite.SrcOver);
+            graphics.setColor(new Color(0, 0, 255, 128));
+            graphics.fillRect(2, 2, 2, 2);
+        } finally {
+            graphics.dispose();
+        }
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        assertTrue(ImageIO.write(image, "png", outputStream));
+        return outputStream.toByteArray();
+    }
+
+    private void assertIllegalArgumentMessage(String expectedMessage, ThrowingRunnable runnable) {
+        try {
+            runnable.run();
+        } catch (IllegalArgumentException ex) {
+            assertEquals(expectedMessage, ex.getMessage());
+            return;
+        } catch (Exception ex) {
+            throw new AssertionError("Expected IllegalArgumentException", ex);
+        }
+        throw new AssertionError("Expected IllegalArgumentException");
+    }
+
+    private interface ThrowingRunnable {
+        void run() throws Exception;
+    }
 }
diff --git a/entrance/src/main/resources/application.yml b/entrance/src/main/resources/application.yml
index 6480d5f6..5d53c9e8 100644
--- a/entrance/src/main/resources/application.yml
+++ b/entrance/src/main/resources/application.yml
@@ -52,12 +52,7 @@ socket:
   device:
     ip: 127.0.0.1
     port: 61000
-#  source:
-#    ip: 192.168.1.121
-#    port: 10086
-#  device:
-#    ip: 192.168.1.121
-#    port: 61000
+
 
 webSocket:
   port: 7778
@@ -66,33 +61,15 @@ webSocket:
 sntp:
   port: 123
 
-#Dip:
-  #  暂态前时间（s）
-  #  fPreTime: 2f
-  #写入时间（s）
-#  fRampIn: 0.001f
-  #写出时间（s）
-#  fRampOut: 0.001f
-#  暂态后时间（s）
-#  fAfterTime: 3f
 
-
-#Flicker:
-#  waveFluType: CPM
-#  waveType: SQU
-#  fDutyCycle: 50f
-
-#log:
-#  homeDir: D:\logs
-#  commonLevel: info
 report:
   #  template: D:\template
   #  reportDir: D:\report
   dateFormat: yyyy年MM月dd日
-#data:
-#  homeDir: D:\data
-#resource:
-#  videoDir: ${data.homeDir}\resources\videos
+device:
+  image:
+    dir: D:\device-images
+
 qr:
   cloud: http://pqmcc.com:18082/api/file
   dev: