附件修改时出现重复附件问题

mhotel/src/com/happy/dao/impl/FileImplInfoDao.java

@@ -51,7 +51,7 @@ public class FileImplInfoDao implements FileInfoDao {
 
     @Override
     public int updateFile(FileInfo file) {
-        String sql = "UPDATE file_info SET id = :id, link_id = :link_id, url = :url, name = :name WHERE id = :id";
+        String sql = "UPDATE file_info SET link_id = :link_id, url = :url, name = :name WHERE id = :id";
         MapSqlParameterSource sps = new MapSqlParameterSource();
         sps.addValue("link_id",file.getLinkId());
         sps.addValue("url",file.getUrl());