修复比较符

src/main/java/com/genersoft/iot/vmp/service/impl/LogServiceImpl.java

@@ -24,7 +24,7 @@ public class LogServiceImpl implements ILogService {
     @Override
     public List<LogFileInfo> queryList(String query, String startTime, String endTime) {
         File logFile = getLogDir();
-        if (logFile == null && !logFile.exists()) {
+        if (logFile == null || !logFile.exists()) {
             throw new ControllerException(ErrorCode.ERROR100.getCode(), "获取日志文件目录失败");
         }
         File[] files = logFile.listFiles();