fix:优化xls在web端预览失败的问题

许鹏程

2025-05-19 c356c77683d055f82a668c28db8b56f9c5e04b84

 src/main/java/com/product/file/service/FileManagerService.java

@@ -18,6 +18,7 @@
import com.product.core.spring.context.SpringMVCContextHolder;
import com.product.file.config.CmnConst;
import com.product.file.config.FileCode;
import com.product.file.util.AsposeUtil;
import com.product.file.util.CreateDocumentIndexThread;
import com.product.file.util.FileUtil;
import com.product.file.util.FileUtils;
@@ -445,6 +446,7 @@
         }
      }
   }

   /**
    * 移动端升级，安装包下载
    *
@@ -584,6 +586,7 @@
      }
   
   }

   /**
    * 提取文件信息-下载文件或者在线预览文件
    *
@@ -656,6 +659,19 @@
               tempOs.flush();
               tempOs.close();
            }
            boolean delete = false;
            if (realFileName.endsWith(".xls") && needOnlineViewFlag && localTempFile.exists() && !CoreConst.CLIENT_TYPE_APP.equals(clientType)) {
               //转换为xlsx
               AsposeUtil.xls2xlsx(localTempFile.getPath(), getSystemConfig("temp.dir", "/attachment/temp") + "/" + localTempFile.getName(), "xls");
               File oldFile = localTempFile;
               localTempFile = new File(getSystemConfig("temp.dir", "/attachment/temp") + "/" + localTempFile.getName());
               if (!localTempFile.isFile()) {
                  localTempFile = oldFile;
               } else {
                  delete = true;
                  oldFile.delete();
               }
            }
            response.setContentLengthLong(localTempFile.length());
            InputStream is = new FileInputStream(localTempFile);
            int len;
@@ -695,6 +711,18 @@
            FileUtils.convertPdf(false, false, encrptSignFlag, true, tempSourceFile, dir, fileName, attachmentFse.getString(CmnConst.FILE_NAME));
            tempSourceFile.delete();
         }
         boolean delete = false;
         if (realFileName.endsWith(".xls") && needOnlineViewFlag && file.exists() && !CoreConst.CLIENT_TYPE_APP.equals(clientType)) {
            //转换为xlsx
            AsposeUtil.xls2xlsx(file.getPath(), getSystemConfig("temp.dir", "/attachment/temp") + "/" + file.getName(), "xls");
            File oldFile = file;
            file = new File(getSystemConfig("temp.dir", "/attachment/temp") + "/" + file.getName());
            if (!file.isFile()) {
               file = oldFile;
            } else {
               delete = true;
            }
         }
         int len;
         byte[] b = new byte[1024];
         InputStream is = new FileInputStream(file);
@@ -717,6 +745,9 @@
            os.flush();
         }
         is.close();
         if (delete) {
            file.delete();
         }
      }
      logger.info("文件流获取成功");
   }