diff --git a/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java b/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java
index 872d8c49..31ddca59 100644
--- a/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/activity/SingleTaskActivity.java
@@ -19,7 +19,7 @@ import com.arialyy.downloadutil.core.DownloadManager;
 import com.arialyy.downloadutil.core.command.CmdFactory;
 import com.arialyy.downloadutil.core.command.IDownloadCmd;
 import com.arialyy.downloadutil.orm.DbEntity;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import com.arialyy.frame.util.show.L;
 import com.arialyy.simple.R;
 import com.arialyy.simple.base.BaseActivity;
@@ -50,7 +50,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
       super.handleMessage(msg);
       switch (msg.what) {
         case DOWNLOAD_PRE:
-          mSize.setText(Util.formatFileSize((Long) msg.obj));
+          mSize.setText(CommonUtil.formatFileSize((Long) msg.obj));
           setBtState(false);
           break;
         case DOWNLOAD_FAILE:
@@ -70,7 +70,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
           break;
         case DOWNLOAD_RESUME:
           Toast.makeText(SingleTaskActivity.this,
-              "恢复下载，恢复位置 ==> " + Util.formatFileSize((Long) msg.obj), Toast.LENGTH_SHORT).show();
+              "恢复下载，恢复位置 ==> " + CommonUtil.formatFileSize((Long) msg.obj), Toast.LENGTH_SHORT).show();
           setBtState(false);
           break;
         case DOWNLOAD_COMPLETE:
@@ -174,7 +174,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
         new String[] { mDownloadUrl });
     if (mEntity != null) {
       mPb.setProgress((int) ((mEntity.getCurrentProgress() * 100) / mEntity.getFileSize()));
-      mSize.setText(Util.formatFileSize(mEntity.getFileSize()));
+      mSize.setText(CommonUtil.formatFileSize(mEntity.getFileSize()));
       if (mEntity.getState() == DownloadEntity.STATE_DOWNLOAD_ING) {
         setBtState(false);
       } else if (mEntity.isDownloadComplete()) {
diff --git a/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java b/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java
index 50c8d3c5..5ef1bf35 100644
--- a/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java
+++ b/app/src/main/java/com/arialyy/simple/adapter/DownloadAdapter.java
@@ -12,7 +12,7 @@ import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.core.DownloadManager;
 import com.arialyy.downloadutil.core.command.CmdFactory;
 import com.arialyy.downloadutil.core.command.IDownloadCmd;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import com.arialyy.simple.R;
 import com.arialyy.simple.widget.HorizontalProgressBarWithNumber;
 import java.util.ArrayList;
@@ -121,8 +121,8 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
     }
     holder.bt.setText(str);
     holder.bt.setTextColor(getColor(color));
-    holder.speed.setText(Util.formatFileSize(speed) + "/s");
-    holder.fileSize.setText(covertCurrentSize(progress) + "/" + Util.formatFileSize(size));
+    holder.speed.setText(CommonUtil.formatFileSize(speed) + "/s");
+    holder.fileSize.setText(covertCurrentSize(progress) + "/" + CommonUtil.formatFileSize(size));
     holder.cancel.setOnClickListener(new View.OnClickListener() {
       @Override public void onClick(View v) {
         mData.remove(item);
@@ -134,7 +134,7 @@ public class DownloadAdapter extends AbsRVAdapter<DownloadEntity, DownloadAdapte
   }
 
   private String covertCurrentSize(long currentSize) {
-    String size = Util.formatFileSize(currentSize);
+    String size = CommonUtil.formatFileSize(currentSize);
     return size.substring(0, size.length() - 1);
   }
 
diff --git a/app/src/main/java/com/arialyy/simple/module/DownloadModule.java b/app/src/main/java/com/arialyy/simple/module/DownloadModule.java
index 9ebea3f3..2a4fbe45 100644
--- a/app/src/main/java/com/arialyy/simple/module/DownloadModule.java
+++ b/app/src/main/java/com/arialyy/simple/module/DownloadModule.java
@@ -5,7 +5,7 @@ import android.content.IntentFilter;
 import android.os.Environment;
 import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.core.DownloadManager;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import com.arialyy.frame.util.AndroidUtils;
 import com.arialyy.frame.util.StringUtil;
 import com.arialyy.simple.R;
@@ -66,7 +66,7 @@ public class DownloadModule extends BaseModule {
     String[] urls = getContext().getResources().getStringArray(R.array.test_apk_download_url);
     int i = 0;
     for (String url : urls) {
-      String         fileName = Util.keyToHashCode(url) + ".apk";
+      String         fileName = CommonUtil.keyToHashCode(url) + ".apk";
       DownloadEntity entity   = new DownloadEntity();
       entity.setDownloadUrl(url);
       entity.setDownloadPath(getDownloadPath(url));
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCmd.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCmd.java
index 26aa9d8e..435b06e5 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCmd.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/command/IDownloadCmd.java
@@ -3,8 +3,8 @@ package com.arialyy.downloadutil.core.command;
 import com.arialyy.downloadutil.core.DownloadEntity;
 import com.arialyy.downloadutil.core.DownloadManager;
 import com.arialyy.downloadutil.core.queue.ITaskQueue;
-import com.arialyy.downloadutil.help.CheckHelp;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CheckUtil;
+import com.arialyy.downloadutil.util.CommonUtil;
 
 /**
  * Created by lyy on 2016/8/22.
@@ -19,11 +19,11 @@ public abstract class IDownloadCmd {
    * @param entity 下载实体
    */
   IDownloadCmd(DownloadEntity entity) {
-    if (!CheckHelp.checkDownloadEntity(entity)) {
+    if (!CheckUtil.checkDownloadEntity(entity)) {
       return;
     }
     mEntity = entity;
-    TAG = Util.getClassName(this);
+    TAG = CommonUtil.getClassName(this);
     mQueue = DownloadManager.getInstance().getTaskQueue();
   }
 
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java
index 3840b38f..da3f3344 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/DownloadTaskQueue.java
@@ -3,12 +3,12 @@ package com.arialyy.downloadutil.core.queue;
 import android.content.Context;
 import android.util.Log;
 import com.arialyy.downloadutil.core.DownloadEntity;
+import com.arialyy.downloadutil.core.queue.pool.CachePool;
+import com.arialyy.downloadutil.core.queue.pool.ExecutePool;
 import com.arialyy.downloadutil.core.scheduler.DownloadSchedulers;
+import com.arialyy.downloadutil.core.scheduler.IDownloadSchedulers;
 import com.arialyy.downloadutil.core.task.Task;
 import com.arialyy.downloadutil.core.task.TaskFactory;
-import com.arialyy.downloadutil.core.scheduler.IDownloadSchedulers;
-import com.arialyy.downloadutil.core.queue.pool.CachePool;
-import com.arialyy.downloadutil.core.queue.pool.ExecutePool;
 
 /**
  * Created by lyy on 2016/8/17.
@@ -20,6 +20,7 @@ public class DownloadTaskQueue implements ITaskQueue {
   private              ExecutePool mExecutePool = ExecutePool.getInstance();
   private Context             mContext;
   private IDownloadSchedulers mSchedulers;
+  private int mDownloadNum = 2;
 
   private DownloadTaskQueue() {
   }
@@ -93,6 +94,10 @@ public class DownloadTaskQueue implements ITaskQueue {
     }
   }
 
+  @Override public void setDownloadNum(int downloadNum) {
+
+  }
+
   @Override public Task createTask(DownloadEntity entity) {
     Task task = TaskFactory.getInstance().createTask(mContext, entity, mSchedulers);
     mCachePool.putTask(task);
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java
index 404f354a..8f6824b3 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/ITaskQueue.java
@@ -1,8 +1,8 @@
 package com.arialyy.downloadutil.core.queue;
 
 import com.arialyy.downloadutil.core.DownloadEntity;
-import com.arialyy.downloadutil.core.task.Task;
 import com.arialyy.downloadutil.core.scheduler.IDownloadSchedulers;
+import com.arialyy.downloadutil.core.task.Task;
 
 /**
  * Created by lyy on 2016/8/16.
@@ -10,6 +10,13 @@ import com.arialyy.downloadutil.core.scheduler.IDownloadSchedulers;
  */
 public interface ITaskQueue extends IDownloader {
 
+  /**
+   * 设置下载任务数
+   *
+   * @param downloadNum 下载任务数
+   */
+  public void setDownloadNum(int downloadNum);
+
   /**
    * 创建一个新的下载任务，创建时只是将新任务存储到缓存池
    *
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/CachePool.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/CachePool.java
index 5d8ed99b..45f1610e 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/CachePool.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/CachePool.java
@@ -4,7 +4,7 @@ import android.text.TextUtils;
 import android.util.Log;
 import com.arialyy.downloadutil.core.task.Task;
 import com.arialyy.downloadutil.core.queue.IPool;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.LinkedBlockingQueue;
@@ -49,7 +49,7 @@ public class CachePool implements IPool {
         boolean s = mCacheQueue.offer(task);
         Log.d(TAG, "任务添加" + (s ? "成功" : "失败，【" + url + "】"));
         if (s) {
-          mCacheArray.put(Util.keyToHashKey(url), task);
+          mCacheArray.put(CommonUtil.keyToHashKey(url), task);
         }
         return s;
       }
@@ -61,7 +61,7 @@ public class CachePool implements IPool {
       Task task = mCacheQueue.poll();
       if (task != null) {
         String url = task.getDownloadEntity().getDownloadUrl();
-        mCacheArray.remove(Util.keyToHashKey(url));
+        mCacheArray.remove(CommonUtil.keyToHashKey(url));
       }
       return task;
     }
@@ -73,7 +73,7 @@ public class CachePool implements IPool {
         Log.e(TAG, "请传入有效的下载链接");
         return null;
       }
-      String key = Util.keyToHashKey(downloadUrl);
+      String key = CommonUtil.keyToHashKey(downloadUrl);
       return mCacheArray.get(key);
     }
   }
@@ -84,7 +84,7 @@ public class CachePool implements IPool {
         Log.e(TAG, "任务不能为空");
         return false;
       } else {
-        String key = Util.keyToHashKey(task.getDownloadEntity().getDownloadUrl());
+        String key = CommonUtil.keyToHashKey(task.getDownloadEntity().getDownloadUrl());
         mCacheArray.remove(key);
         return mCacheQueue.remove(task);
       }
@@ -97,7 +97,7 @@ public class CachePool implements IPool {
         Log.e(TAG, "请传入有效的下载链接");
         return false;
       }
-      String key  = Util.keyToHashKey(downloadUrl);
+      String key  = CommonUtil.keyToHashKey(downloadUrl);
       Task   task = mCacheArray.get(key);
       mCacheArray.remove(key);
       return mCacheQueue.remove(task);
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/ExecutePool.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/ExecutePool.java
index 059177f3..e84715d0 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/ExecutePool.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/queue/pool/ExecutePool.java
@@ -2,9 +2,9 @@ package com.arialyy.downloadutil.core.queue.pool;
 
 import android.text.TextUtils;
 import android.util.Log;
-import com.arialyy.downloadutil.core.task.Task;
 import com.arialyy.downloadutil.core.queue.IPool;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.core.task.Task;
+import com.arialyy.downloadutil.util.CommonUtil;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ArrayBlockingQueue;
@@ -18,13 +18,13 @@ public class ExecutePool implements IPool {
   private static final    String      TAG      = "ExecutePool";
   private static final    Object      LOCK     = new Object();
   private static final    long        TIME_OUT = 1000;
-  public static           int         SIZE     = 2;
   private static volatile ExecutePool INSTANCE = null;
+  public static           int         mSize    = 2;
   private ArrayBlockingQueue<Task> mExecuteQueue;
   private Map<String, Task>        mExecuteArray;
 
   private ExecutePool() {
-    mExecuteQueue = new ArrayBlockingQueue<>(SIZE);
+    mExecuteQueue = new ArrayBlockingQueue<>(mSize);
     mExecuteArray = new HashMap<>();
   }
 
@@ -48,7 +48,7 @@ public class ExecutePool implements IPool {
         Log.e(TAG, "队列中已经包含了该任务，任务下载链接【" + url + "】");
         return false;
       } else {
-        if (mExecuteQueue.size() >= SIZE) {
+        if (mExecuteQueue.size() >= mSize) {
           if (pollFirstTask()) {
             return putNewTask(task);
           }
@@ -60,6 +60,25 @@ public class ExecutePool implements IPool {
     return false;
   }
 
+  /**
+   * 设置执行任务数
+   *
+   * @param downloadNum 下载数
+   */
+  private void setDownloadNum(int downloadNum) {
+    try {
+      ArrayBlockingQueue<Task> temp = new ArrayBlockingQueue<>(downloadNum);
+      Task                     task;
+      while ((task = mExecuteQueue.poll(TIME_OUT, TimeUnit.MICROSECONDS)) != null) {
+        temp.offer(task);
+      }
+      mExecuteQueue = temp;
+      mSize = downloadNum;
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+  }
+
   /**
    * 添加新任务
    *
@@ -71,7 +90,7 @@ public class ExecutePool implements IPool {
     Log.w(TAG, "任务添加" + (s ? "成功" : "失败，【" + url + "】"));
     if (s) {
       newTask.start();
-      mExecuteArray.put(Util.keyToHashKey(url), newTask);
+      mExecuteArray.put(CommonUtil.keyToHashKey(url), newTask);
     }
     return s;
   }
@@ -88,7 +107,7 @@ public class ExecutePool implements IPool {
       }
       oldTask.stop();
       //            wait(200);
-      String key = Util.keyToHashKey(oldTask.getDownloadEntity().getDownloadUrl());
+      String key = CommonUtil.keyToHashKey(oldTask.getDownloadEntity().getDownloadUrl());
       mExecuteArray.remove(key);
     } catch (InterruptedException e) {
       e.printStackTrace();
@@ -102,7 +121,7 @@ public class ExecutePool implements IPool {
       Task task = mExecuteQueue.poll();
       if (task != null) {
         String url = task.getDownloadEntity().getDownloadUrl();
-        mExecuteArray.remove(Util.keyToHashKey(url));
+        mExecuteArray.remove(CommonUtil.keyToHashKey(url));
       }
       return task;
     }
@@ -114,7 +133,7 @@ public class ExecutePool implements IPool {
         Log.e(TAG, "请传入有效的下载链接");
         return null;
       }
-      String key = Util.keyToHashKey(downloadUrl);
+      String key = CommonUtil.keyToHashKey(downloadUrl);
       return mExecuteArray.get(key);
     }
   }
@@ -125,7 +144,7 @@ public class ExecutePool implements IPool {
         Log.e(TAG, "任务不能为空");
         return false;
       } else {
-        String key = Util.keyToHashKey(task.getDownloadEntity().getDownloadUrl());
+        String key = CommonUtil.keyToHashKey(task.getDownloadEntity().getDownloadUrl());
         mExecuteArray.remove(key);
         return mExecuteQueue.remove(task);
       }
@@ -138,7 +157,7 @@ public class ExecutePool implements IPool {
         Log.e(TAG, "请传入有效的下载链接");
         return false;
       }
-      String key  = Util.keyToHashKey(downloadUrl);
+      String key  = CommonUtil.keyToHashKey(downloadUrl);
       Task   task = mExecuteArray.get(key);
       mExecuteArray.remove(key);
       return mExecuteQueue.remove(task);
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java
index 85e2235a..a7b98158 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/scheduler/DownloadSchedulers.java
@@ -73,7 +73,7 @@ public class DownloadSchedulers implements IDownloadSchedulers {
     switch (msg.what) {
       case STOP:
       case CANCEL:
-        if (mQueue.getExecutePool().size() != ExecutePool.SIZE) {
+        if (mQueue.getExecutePool().size() != ExecutePool.mSize) {
           startNextTask(entity);
         }
         break;
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/core/task/DownloadUtil.java b/downloadutil/src/main/java/com/arialyy/downloadutil/core/task/DownloadUtil.java
index 70e77d97..630e2abb 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/core/task/DownloadUtil.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/core/task/DownloadUtil.java
@@ -4,7 +4,7 @@ import android.content.Context;
 import android.util.Log;
 import android.util.SparseArray;
 import com.arialyy.downloadutil.core.DownloadEntity;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
@@ -165,7 +165,7 @@ final class DownloadUtil implements IDownloadUtil {
     try {
       if (!configFile.exists()) { //记录文件被删除，则重新下载
         isNewTask = true;
-        Util.createFile(configFile.getPath());
+        CommonUtil.createFile(configFile.getPath());
       } else {
         isNewTask = !dFile.exists();
       }
@@ -192,14 +192,14 @@ final class DownloadUtil implements IDownloadUtil {
           if (code == 200) {
             int fileLength = conn.getContentLength();
             //必须建一个文件
-            Util.createFile(filePath);
+            CommonUtil.createFile(filePath);
             RandomAccessFile file = new RandomAccessFile(filePath, "rwd");
             //设置文件长度
             file.setLength(fileLength);
             mListener.onPostPre(fileLength);
             //分配每条线程的下载区间
             Properties pro = null;
-            pro = Util.loadConfig(configFile);
+            pro = CommonUtil.loadConfig(configFile);
             if (pro.isEmpty()) {
               isNewTask = true;
             } else {
@@ -288,7 +288,7 @@ final class DownloadUtil implements IDownloadUtil {
               + "】\n【filePath:"
               + filePath
               + "】"
-              + Util.getPrintException(e));
+              + CommonUtil.getPrintException(e));
         }
       }
     }).start();
@@ -486,9 +486,9 @@ final class DownloadUtil implements IDownloadUtil {
      */
     private void writeConfig(String key, String record) throws IOException {
       File       configFile = new File(configFPath);
-      Properties pro        = Util.loadConfig(configFile);
+      Properties pro        = CommonUtil.loadConfig(configFile);
       pro.setProperty(key, record);
-      Util.saveConfig(configFile, pro);
+      CommonUtil.saveConfig(configFile, pro);
     }
 
     /**
@@ -502,7 +502,7 @@ final class DownloadUtil implements IDownloadUtil {
           isStop = true;
           Log.e(TAG, msg);
           if (ex != null) {
-            Log.e(TAG, Util.getPrintException(ex));
+            Log.e(TAG, CommonUtil.getPrintException(ex));
           }
           if (currentLocation != -1) {
             String location = String.valueOf(currentLocation);
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/help/Lockhelp.java b/downloadutil/src/main/java/com/arialyy/downloadutil/help/Lockhelp.java
deleted file mode 100644
index f4eaebb6..00000000
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/help/Lockhelp.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package com.arialyy.downloadutil.help;
-
-/**
- * Created by “AriaLyy@outlook.com” on 2016/11/2.
- */
-public class LockHelp {
-  public static final Object LOCK = new Object();
-}
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java b/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java
index 6fc7bcd7..5fb90e2e 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbEntity.java
@@ -1,7 +1,7 @@
 package com.arialyy.downloadutil.orm;
 
 import android.support.annotation.NonNull;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.List;
@@ -117,7 +117,7 @@ public class DbEntity {
 
   private void updateRowID() {
     try {
-      Field[]      fields = Util.getFields(getClass());
+      Field[]      fields = CommonUtil.getFields(getClass());
       List<String> where  = new ArrayList<>();
       List<String> values = new ArrayList<>();
       for (Field field : fields) {
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbUtil.java b/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbUtil.java
index 256887a5..890ad662 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbUtil.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/orm/DbUtil.java
@@ -6,7 +6,7 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.support.annotation.NonNull;
 import android.util.Log;
-import com.arialyy.downloadutil.util.Util;
+import com.arialyy.downloadutil.util.CommonUtil;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.Date;
@@ -71,7 +71,7 @@ public class DbUtil {
       return;
     }
     StringBuilder sb = new StringBuilder();
-    sb.append("DELETE FROM ").append(Util.getClassName(clazz)).append(" WHERE ");
+    sb.append("DELETE FROM ").append(CommonUtil.getClassName(clazz)).append(" WHERE ");
     int i = 0;
     for (Object where : wheres) {
       sb.append(where).append("=").append("'").append(values[i]).append("'");
@@ -89,10 +89,10 @@ public class DbUtil {
   synchronized void modifyData(DbEntity dbEntity) {
     mDb = mHelper.getWritableDatabase();
     Class<?> clazz  = dbEntity.getClass();
-    Field[]  fields = Util.getFields(clazz);
+    Field[]  fields = CommonUtil.getFields(clazz);
     if (fields != null && fields.length > 0) {
       StringBuilder sb = new StringBuilder();
-      sb.append("UPDATE ").append(Util.getClassName(dbEntity)).append(" SET ");
+      sb.append("UPDATE ").append(CommonUtil.getClassName(dbEntity)).append(" SET ");
       int i = 0;
       for (Field field : fields) {
         field.setAccessible(true);
@@ -127,7 +127,7 @@ public class DbUtil {
     }
     mDb = mHelper.getReadableDatabase();
     StringBuilder sb = new StringBuilder();
-    sb.append("SELECT rowid, * FROM ").append(Util.getClassName(clazz));
+    sb.append("SELECT rowid, * FROM ").append(CommonUtil.getClassName(clazz));
     print(FIND_ALL_DATA, sb.toString());
     Cursor cursor = mDb.rawQuery(sb.toString(), null);
     return cursor.getCount() > 0 ? newInstanceEntity(clazz, cursor) : null;
@@ -150,7 +150,7 @@ public class DbUtil {
       return null;
     }
     StringBuilder sb = new StringBuilder();
-    sb.append("SELECT rowid, * FROM ").append(Util.getClassName(clazz)).append(" where ");
+    sb.append("SELECT rowid, * FROM ").append(CommonUtil.getClassName(clazz)).append(" where ");
     int i = 0;
     for (Object where : wheres) {
       sb.append(where).append("=").append("'").append(values[i]).append("'");
@@ -171,10 +171,10 @@ public class DbUtil {
       createTable(clazz);
     }
     mDb = mHelper.getWritableDatabase();
-    Field[] fields = Util.getFields(clazz);
+    Field[] fields = CommonUtil.getFields(clazz);
     if (fields != null && fields.length > 0) {
       StringBuilder sb = new StringBuilder();
-      sb.append("INSERT INTO ").append(Util.getClassName(dbEntity)).append("(");
+      sb.append("INSERT INTO ").append(CommonUtil.getClassName(dbEntity)).append("(");
       int i = 0;
       for (Field field : fields) {
         field.setAccessible(true);
@@ -221,7 +221,7 @@ public class DbUtil {
     try {
       StringBuilder sb = new StringBuilder();
       sb.append("SELECT COUNT(*) AS c FROM sqlite_master WHERE type='table' AND name='");
-      sb.append(Util.getClassName(clazz));
+      sb.append(CommonUtil.getClassName(clazz));
       sb.append("'");
       print(TABLE_EXISTS, sb.toString());
       cursor = mDb.rawQuery(sb.toString(), null);
@@ -247,10 +247,10 @@ public class DbUtil {
     if (mDb == null || !mDb.isOpen()) {
       mDb = mHelper.getWritableDatabase();
     }
-    Field[] fields = Util.getFields(clazz);
+    Field[] fields = CommonUtil.getFields(clazz);
     if (fields != null && fields.length > 0) {
       StringBuilder sb = new StringBuilder();
-      sb.append("create table ").append(Util.getClassName(clazz)).append("(");
+      sb.append("create table ").append(CommonUtil.getClassName(clazz)).append("(");
       for (Field field : fields) {
         field.setAccessible(true);
         Ignore ignore = field.getAnnotation(Ignore.class);
@@ -333,7 +333,7 @@ public class DbUtil {
    */
   synchronized int[] getRowId(Class clazz) {
     mDb = mHelper.getReadableDatabase();
-    Cursor cursor = mDb.rawQuery("SELECT rowid, * FROM " + Util.getClassName(clazz), null);
+    Cursor cursor = mDb.rawQuery("SELECT rowid, * FROM " + CommonUtil.getClassName(clazz), null);
     int[]  ids    = new int[cursor.getCount()];
     int    i      = 0;
     while (cursor.moveToNext()) {
@@ -358,7 +358,7 @@ public class DbUtil {
       return -1;
     }
     StringBuilder sb = new StringBuilder();
-    sb.append("SELECT rowid FROM ").append(Util.getClassName(clazz)).append(" WHERE ");
+    sb.append("SELECT rowid FROM ").append(CommonUtil.getClassName(clazz)).append(" WHERE ");
     int i = 0;
     for (Object where : wheres) {
       sb.append(where).append("=").append("'").append(values[i]).append("'");
@@ -378,7 +378,7 @@ public class DbUtil {
    */
   private synchronized <T extends DbEntity> List<T> newInstanceEntity(Class<T> clazz,
       Cursor cursor) {
-    Field[] fields  = Util.getFields(clazz);
+    Field[] fields  = CommonUtil.getFields(clazz);
     List<T> entitys = new ArrayList<>();
     if (fields != null && fields.length > 0) {
       try {
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java b/downloadutil/src/main/java/com/arialyy/downloadutil/util/CheckUtil.java
similarity index 92%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/util/CheckUtil.java
index 321754da..e2f85b9c 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/help/CheckHelp.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/util/CheckUtil.java
@@ -1,4 +1,4 @@
-package com.arialyy.downloadutil.help;
+package com.arialyy.downloadutil.util;
 
 import android.content.res.Resources;
 import android.text.TextUtils;
@@ -11,8 +11,8 @@ import java.io.File;
  * Created by Lyy on 2016/9/23.
  * 检查帮助类
  */
-public class CheckHelp {
-  private static final String TAG = "CheckHelp";
+public class CheckUtil {
+  private static final String TAG = "CheckUtil";
 
   /**
    * 检测下载实体是否合法
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java b/downloadutil/src/main/java/com/arialyy/downloadutil/util/CommonUtil.java
similarity index 99%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/util/CommonUtil.java
index b437fe17..0d0f951a 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/util/Util.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/util/CommonUtil.java
@@ -14,7 +14,7 @@ import java.util.Properties;
 /**
  * Created by lyy on 2016/1/22.
  */
-public class Util {
+public class CommonUtil {
   private static final String TAG = "util";
 
   /**
diff --git a/downloadutil/src/main/java/com/arialyy/downloadutil/help/PathHelp.java b/downloadutil/src/main/java/com/arialyy/downloadutil/util/PathUtil.java
similarity index 95%
rename from downloadutil/src/main/java/com/arialyy/downloadutil/help/PathHelp.java
rename to downloadutil/src/main/java/com/arialyy/downloadutil/util/PathUtil.java
index 6d47fb13..262146ef 100644
--- a/downloadutil/src/main/java/com/arialyy/downloadutil/help/PathHelp.java
+++ b/downloadutil/src/main/java/com/arialyy/downloadutil/util/PathUtil.java
@@ -1,4 +1,4 @@
-package com.arialyy.downloadutil.help;
+package com.arialyy.downloadutil.util;
 
 import android.os.Environment;
 import java.security.MessageDigest;
@@ -8,7 +8,7 @@ import java.security.NoSuchAlgorithmException;
  * Created by lyy on 2016/9/27.
  * 下载路径帮助类
  */
-public class PathHelp {
+public class PathUtil {
 
   /**
    * 下载链接转换保存路径