diff --git a/.gitignore b/.gitignore
index cda18dcf..0a7d0a5d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,5 @@
 .externalNativeBuild
 .idea/misc.xml
 .gradle
-/.idea
\ No newline at end of file
+/.idea
+.idea
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 5f6de159..b0a774eb 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -3,9 +3,7 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/Aria.iml" filepath="$PROJECT_DIR$/Aria.iml" />
-      <module fileurl="file://$PROJECT_DIR$/Aria/Aria.iml" filepath="$PROJECT_DIR$/Aria/Aria.iml" />
       <module fileurl="file://$PROJECT_DIR$/Aria/Aria-Aria.iml" filepath="$PROJECT_DIR$/Aria/Aria-Aria.iml" />
-      <module fileurl="file://$PROJECT_DIR$/AriaPrj.iml" filepath="$PROJECT_DIR$/AriaPrj.iml" />
       <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
     </modules>
   </component>
diff --git a/Aria/src/main/java/com/arialyy/aria/core/command/AbsCmd.java b/Aria/src/main/java/com/arialyy/aria/core/command/AbsCmd.java
index 72a86147..452b0a34 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/command/AbsCmd.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/command/AbsCmd.java
@@ -40,7 +40,7 @@ public abstract class AbsCmd<T extends ITaskEntity> implements ICmd {
    * @param targetName 产生任务的对象名
    */
   AbsCmd(String targetName, T entity) {
-    CheckUtil.checkTaskEntity(entity);
+    CheckUtil.checkCmdEntity(entity);
     mTargetName = targetName;
     mEntity = entity;
     TAG = CommonUtil.getClassName(this);
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java
index 83fc3d46..54e94324 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTask.java
@@ -188,7 +188,7 @@ public class DownloadTask implements ITask {
 
 
     public Builder(String targetName, DownloadTaskEntity taskEntity) {
-      CheckUtil.checkDownloadEntity(taskEntity.downloadEntity);
+      CheckUtil.checkDownloadTaskEntity(taskEntity.downloadEntity);
       this.targetName = targetName;
       this.taskEntity = taskEntity;
     }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java
index 81ae37df..38d76f38 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadUtil.java
@@ -62,7 +62,7 @@ final class DownloadUtil implements IDownloadUtil, Runnable {
 
   DownloadUtil(Context context, DownloadTaskEntity entity, IDownloadListener downloadListener,
       int threadNum) {
-    CheckUtil.checkDownloadEntity(entity.downloadEntity);
+    CheckUtil.checkDownloadTaskEntity(entity.downloadEntity);
     mDownloadEntity = entity.downloadEntity;
     mContext = context.getApplicationContext();
     mDownloadTaskEntity = entity;
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java
index 39fa7591..be264f97 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadUtil.java
@@ -50,7 +50,7 @@ final class UploadUtil implements Runnable {
 
   UploadUtil(UploadTaskEntity taskEntity, IUploadListener listener) {
     mTaskEntity = taskEntity;
-    CheckUtil.checkUploadEntity(taskEntity.uploadEntity);
+    CheckUtil.checkUploadTaskEntity(taskEntity.uploadEntity);
     mUploadEntity = taskEntity.uploadEntity;
     if (listener == null) {
       throw new IllegalArgumentException("上传监听不能为空");
diff --git a/Aria/src/main/java/com/arialyy/aria/util/CheckUtil.java b/Aria/src/main/java/com/arialyy/aria/util/CheckUtil.java
index 901282fc..25608e5e 100644
--- a/Aria/src/main/java/com/arialyy/aria/util/CheckUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/util/CheckUtil.java
@@ -17,14 +17,12 @@
 package com.arialyy.aria.util;
 
 import android.text.TextUtils;
-import android.util.Log;
 import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.download.DownloadTaskEntity;
 import com.arialyy.aria.core.inf.ITaskEntity;
 import com.arialyy.aria.core.upload.UploadEntity;
 import com.arialyy.aria.core.upload.UploadTaskEntity;
 import com.arialyy.aria.exception.FileException;
-import java.io.File;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -89,20 +87,40 @@ public class CheckUtil {
    */
   public static void checkTaskEntity(ITaskEntity entity) {
     if (entity instanceof DownloadTaskEntity) {
-      checkDownloadEntity(((DownloadTaskEntity) entity).downloadEntity);
+      checkDownloadTaskEntity(((DownloadTaskEntity) entity).downloadEntity);
     } else if (entity instanceof UploadTaskEntity) {
-      checkUploadEntity(((UploadTaskEntity) entity).uploadEntity);
+      checkUploadTaskEntity(((UploadTaskEntity) entity).uploadEntity);
+    }
+  }
+
+  /**
+   * 检查命令实体
+   */
+  public static void checkCmdEntity(ITaskEntity entity) {
+    if (entity instanceof DownloadTaskEntity) {
+      DownloadEntity entity1 = ((DownloadTaskEntity) entity).downloadEntity;
+      if (entity1 == null) {
+        throw new NullPointerException("下载实体不能为空");
+      } else if (TextUtils.isEmpty(entity1.getDownloadUrl())) {
+        throw new IllegalArgumentException("下载链接不能为空");
+      }
+    } else if (entity instanceof UploadTaskEntity) {
+      UploadEntity entity1 = ((UploadTaskEntity) entity).uploadEntity;
+      if (entity1 == null) {
+        throw new NullPointerException("上传实体不能为空");
+      } else if (TextUtils.isEmpty(entity1.getFilePath())) {
+        throw new IllegalArgumentException("上传文件路径不能为空");
+      }
     }
   }
 
   /**
    * 检查上传实体是否合法
    */
-  public static void checkUploadEntity(UploadEntity entity) {
+  public static void checkUploadTaskEntity(UploadEntity entity) {
     if (entity == null) {
       throw new NullPointerException("上传实体不能为空");
-    }
-    if (TextUtils.isEmpty(entity.getFilePath())) {
+    } else if (TextUtils.isEmpty(entity.getFilePath())) {
       throw new IllegalArgumentException("上传文件路径不能为空");
     } else if (TextUtils.isEmpty(entity.getFileName())) {
       throw new IllegalArgumentException("上传文件名不能为空");
@@ -115,7 +133,7 @@ public class CheckUtil {
    * @param entity 下载实体
    * @return 合法(true)
    */
-  public static void checkDownloadEntity(DownloadEntity entity) {
+  public static void checkDownloadTaskEntity(DownloadEntity entity) {
     if (entity == null) {
       throw new NullPointerException("下载实体不能为空");
     } else if (TextUtils.isEmpty(entity.getDownloadUrl())) {
@@ -125,15 +143,5 @@ public class CheckUtil {
     } else if (TextUtils.isEmpty(entity.getDownloadPath())) {
       throw new FileException("文件保存路径不能为null");
     }
-    String fileName = entity.getFileName();
-    if (fileName.contains(" ")) {
-      fileName = fileName.replace(" ", "_");
-    }
-    String dPath = entity.getDownloadPath();
-    File file = new File(dPath);
-    if (file.isDirectory()) {
-      dPath += fileName;
-      entity.setDownloadPath(dPath);
-    }
   }
 }
\ No newline at end of file