给商品相关接口增加图片缩略图字段的返回

jshERP-boot/src/main/java/com/jsh/erp/controller/SystemConfigController.java

@@ -6,16 +6,13 @@ import com.jsh.erp.service.systemConfig.SystemConfigService;
 import com.jsh.erp.service.user.UserService;
 import com.jsh.erp.service.userBusiness.UserBusinessService;
 import com.jsh.erp.utils.BaseResponseInfo;
-import com.jsh.erp.utils.FileUtils;
 import com.jsh.erp.utils.StringUtil;
-import com.jsh.erp.utils.Tools;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.util.AntPathMatcher;
-import org.springframework.util.FileCopyUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -25,8 +22,10 @@ import org.springframework.web.multipart.MultipartHttpServletRequest;
 import org.springframework.web.servlet.HandlerMapping;
 
 import javax.annotation.Resource;
+import javax.imageio.ImageIO;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.awt.image.BufferedImage;
 import java.io.*;
 import java.net.HttpURLConnection;
 import java.net.URL;
@@ -227,6 +226,51 @@ public class SystemConfigController {
         }
     }
 
+    /**
+     * 预览缩略图&下载文件
+     * @param request
+     * @param response
+     */
+    @GetMapping(value = "/static/mini/**")
+    @ApiOperation(value = "预览缩略图&下载文件")
+    public void viewMini(HttpServletRequest request, HttpServletResponse response) {
+        // ISO-8859-1 ==> UTF-8 进行编码转换
+        String imgPath = extractPathFromPattern(request);
+        if(StringUtil.isEmpty(imgPath) || imgPath=="null"){
+            return;
+        }
+        OutputStream outputStream = null;
+        try {
+            imgPath = imgPath.replace("..", "");
+            if (imgPath.endsWith(",")) {
+                imgPath = imgPath.substring(0, imgPath.length() - 1);
+            }
+            String fileUrl = "";
+            if(fileUploadType == 1) {
+                fileUrl = systemConfigService.getFileUrlLocal(imgPath);
+            } else if(fileUploadType == 2) {
+                fileUrl = systemConfigService.getFileUrlAliOss(imgPath);
+            }
+            int index = fileUrl.lastIndexOf(".");
+            String ext = fileUrl.substring(index + 1);
+            BufferedImage image = systemConfigService.getImageMini(fileUrl, 40);
+            outputStream = response.getOutputStream();
+            ImageIO.write(image, ext, outputStream);
+            response.flushBuffer();
+        } catch (Exception e) {
+            response.setStatus(404);
+            e.printStackTrace();
+        } finally {
+            if (outputStream != null) {
+                try {
+                    outputStream.close();
+                } catch (IOException e) {
+                    logger.error(e.getMessage(), e);
+                }
+            }
+        }
+    }
+
     /**
      *  把指定URL后的字符串全部截断当成参数
      *  这么做是为了防止URL中包含中文或者特殊字符（/等）时，匹配不了的问题