diff --git a/src/main/java/net/irext/decoder/businesslogic/DecodeLogic.java b/src/main/java/net/irext/decoder/businesslogic/DecodeLogic.java
index 7918e1b..396d1b7 100644
--- a/src/main/java/net/irext/decoder/businesslogic/DecodeLogic.java
+++ b/src/main/java/net/irext/decoder/businesslogic/DecodeLogic.java
@@ -4,7 +4,7 @@ import net.irext.decoder.alioss.OSSHelper;
 import net.irext.decoder.model.IRBinary;
 import net.irext.decoder.model.RemoteIndex;
 import net.irext.decoder.redisrepo.IIRBinaryRepository;
-import net.irext.decoder.utils.FileUtils;
+import net.irext.decoder.utils.FileUtil;
 import net.irext.decoder.utils.MD5Util;
 import org.apache.commons.io.IOUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -13,10 +13,8 @@ import org.springframework.stereotype.Controller;
 import javax.servlet.ServletContext;
 import java.io.File;
 import java.io.FileInputStream;
-import java.io.IOException;
 import java.io.InputStream;
 import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
 
 /**
  * Filename:       CollectCodeLogic
@@ -117,8 +115,8 @@ public class DecodeLogic {
             String ossChecksum =
                     MD5Util.byteArrayToHexString(MessageDigest.getInstance("MD5").digest(binaries)).toUpperCase();
             if (ossChecksum.equals(checksum)) {
-                FileUtils.createDirs(downloadPath);
-                if (FileUtils.write(binFile, binaries)) {
+                FileUtil.createDirs(downloadPath);
+                if (FileUtil.write(binFile, binaries)) {
                     return new FileInputStream(binFile);
                 } else {
                     System.out.println("fatal : write file to local path failed");
diff --git a/src/main/java/net/irext/decoder/service/IRDecodeService.java b/src/main/java/net/irext/decoder/service/IRDecodeService.java
index d98a29e..b82dc0c 100644
--- a/src/main/java/net/irext/decoder/service/IRDecodeService.java
+++ b/src/main/java/net/irext/decoder/service/IRDecodeService.java
@@ -13,6 +13,7 @@ import net.irext.decoder.response.DecodeResponse;
 import net.irext.decoder.response.ServiceResponse;
 import net.irext.decoder.response.Status;
 import net.irext.decoder.service.base.AbstractBaseService;
+import net.irext.decoder.utils.LoggerUtil;
 import net.irext.decodesdk.bean.ACStatus;
 import net.irext.decodesdk.utils.Constants;
 import org.apache.logging.log4j.LogManager;
@@ -34,7 +35,7 @@ import org.springframework.web.bind.annotation.*;
 @RequestMapping("/irext")
 public class IRDecodeService extends AbstractBaseService {
 
-    Logger logger = LogManager.getLogger(IRDecodeService.class);
+    private static final String TAG = IRDecodeService.class.getSimpleName();
 
     private RemoteIndexMapper remoteIndexMapper;
 
@@ -53,7 +54,7 @@ public class IRDecodeService extends AbstractBaseService {
         try {
             int remoteIndexId = openRequest.getRemoteIndexId();
 
-            logger.trace("irOpen API called : " + remoteIndexId);
+            LoggerUtil.getInstance().trace(TAG,"irOpen API called : " + remoteIndexId);
 
             ServiceResponse response = new ServiceResponse();
             RemoteIndex remoteIndex = IndexLogic.getInstance(remoteIndexMapper).getRemoteIndex(remoteIndexId);
diff --git a/src/main/java/net/irext/decoder/utils/FileUtils.java b/src/main/java/net/irext/decoder/utils/FileUtil.java
similarity index 98%
rename from src/main/java/net/irext/decoder/utils/FileUtils.java
rename to src/main/java/net/irext/decoder/utils/FileUtil.java
index e0e792e..1629b00 100644
--- a/src/main/java/net/irext/decoder/utils/FileUtils.java
+++ b/src/main/java/net/irext/decoder/utils/FileUtil.java
@@ -3,7 +3,7 @@ package net.irext.decoder.utils;
 import java.io.*;
 
 /**
- * Filename:       FileUtils.java
+ * Filename:       FileUtil.java
  * Revised:        Date: 2017-04-14
  * Revision:       Revision: 1.0
  * <p>
@@ -12,7 +12,7 @@ import java.io.*;
  * Revision log:
  * 2017-04-14: created by strawmanbobi
  */
-public class FileUtils {
+public class FileUtil {
 
     public static boolean write(File file, byte[] binaries) {
         if (null == file) {
diff --git a/src/main/java/net/irext/decoder/utils/LoggerUtil.java b/src/main/java/net/irext/decoder/utils/LoggerUtil.java
new file mode 100644
index 0000000..03ab5e7
--- /dev/null
+++ b/src/main/java/net/irext/decoder/utils/LoggerUtil.java
@@ -0,0 +1,40 @@
+package net.irext.decoder.utils;
+
+import net.irext.decoder.service.IRDecodeService;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+/**
+ * Filename:       LoggerUtil.java
+ * Revised:        Date: 2019-01-01
+ * Revision:       Revision: 1.0
+ * <p>
+ * Description:    Logging util
+ * <p>
+ * Revision log:
+ * 2019-01-01: created by strawmanbobi
+ */
+public class LoggerUtil {
+    private static LoggerUtil loggerUtil;
+    private Logger logger;
+    private static final int MODE = 0;
+
+    LoggerUtil() {
+        this.logger = LogManager.getLogger(LoggerUtil.class.getSimpleName());
+    }
+
+    public static LoggerUtil getInstance() {
+        if (null == loggerUtil) {
+            loggerUtil = new LoggerUtil();
+        }
+        return loggerUtil;
+    }
+
+    public void trace(String tag, String log) {
+        if (0 == MODE) {
+            System.out.println("[" + tag + "] " + log);
+        } else {
+            this.logger.trace("[" + tag + "] " + log);
+        }
+    }
+}