diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java
index 281be7b9..9982cdfa 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java
@@ -17,10 +17,9 @@ package com.arialyy.aria.core.common.http;
 
 import android.support.annotation.NonNull;
 import android.text.TextUtils;
-import com.arialyy.aria.core.common.RequestEnum;
 import com.arialyy.aria.core.inf.AbsTarget;
 import com.arialyy.aria.core.inf.AbsTaskEntity;
-import com.arialyy.aria.core.inf.IHttpHeaderTarget;
+import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
 import com.arialyy.aria.util.ALog;
 import java.net.Proxy;
 import java.util.Collection;
@@ -32,7 +31,7 @@ import java.util.Set;
  * HTTP header参数设置委托类
  */
 public class HttpHeaderDelegate<TARGET extends AbsTarget>
-    implements IHttpHeaderTarget<TARGET> {
+    implements IHttpHeaderDelegate<TARGET> {
   private static final String TAG = "HttpHeaderDelegate";
   private TARGET mTarget;
 
@@ -76,18 +75,6 @@ public class HttpHeaderDelegate<TARGET extends AbsTarget>
     return mTarget;
   }
 
-  /**
-   * 设置请求类型，POST或GET，默认为在GET
-   * 只试用于HTTP请求
-   *
-   * @param requestEnum {@link RequestEnum}
-   */
-  @Override
-  public TARGET setRequestMode(RequestEnum requestEnum) {
-    setRequestMode(mTarget.getTaskEntity(), requestEnum);
-    return mTarget;
-  }
-
   @Override public TARGET setUrlProxy(Proxy proxy) {
     mTarget.getTaskEntity().setProxy(proxy);
     return mTarget;
@@ -101,10 +88,6 @@ public class HttpHeaderDelegate<TARGET extends AbsTarget>
     }
   }
 
-  public void setRequestMode(AbsTaskEntity taskEntity, RequestEnum requestEnum) {
-    taskEntity.setRequestEnum(requestEnum);
-  }
-
   public void addHeaders(AbsTaskEntity taskEntity, Map<String, String> headers) {
      /*
       两个map比较逻辑
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/http/PostDelegate.java b/Aria/src/main/java/com/arialyy/aria/core/common/http/PostDelegate.java
new file mode 100644
index 00000000..f06f3ae9
--- /dev/null
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/http/PostDelegate.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.common.http;
+
+import android.text.TextUtils;
+import com.arialyy.aria.core.common.RequestEnum;
+import com.arialyy.aria.core.download.DownloadGroupTarget;
+import com.arialyy.aria.core.download.DownloadGroupTaskEntity;
+import com.arialyy.aria.core.download.DownloadTaskEntity;
+import com.arialyy.aria.core.inf.AbsTarget;
+import com.arialyy.aria.core.inf.IPostDelegate;
+import com.arialyy.aria.core.inf.ITarget;
+import com.arialyy.aria.util.ALog;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * post处理委托类
+ */
+public class PostDelegate<TARGET extends AbsTarget> implements IPostDelegate<TARGET>, ITarget {
+  private static final String TAG = "PostDelegate";
+  private TARGET mTarget;
+
+  public PostDelegate(TARGET target) {
+    mTarget = target;
+    mTarget.getTaskEntity().setRequestEnum(RequestEnum.POST);
+  }
+
+  @Override public TARGET setParams(Map<String, String> params) {
+    mTarget.getTaskEntity().setParams(params);
+    if (mTarget instanceof DownloadGroupTarget) {
+      for (DownloadTaskEntity subTask : ((DownloadGroupTaskEntity) mTarget.getTaskEntity()).getSubTaskEntities()) {
+        subTask.setParams(params);
+      }
+    }
+    return mTarget;
+  }
+
+  @Override public TARGET setParam(String key, String value) {
+    if (TextUtils.isEmpty(key) || TextUtils.isEmpty(value)) {
+      ALog.d(TAG, "key 或value 为空");
+      return mTarget;
+    }
+    Map<String, String> params = mTarget.getTaskEntity().getParams();
+    if (params == null) {
+      params = new HashMap<>();
+      mTarget.getTaskEntity().setParams(params);
+    }
+    params.put(key, value);
+    if (mTarget instanceof DownloadGroupTarget) {
+      for (DownloadTaskEntity subTask : ((DownloadGroupTaskEntity) mTarget.getTaskEntity()).getSubTaskEntities()) {
+        subTask.setParams(params);
+      }
+    }
+    return mTarget;
+  }
+
+  @Override public void start() {
+    mTarget.start();
+  }
+
+  @Override public void stop() {
+    mTarget.stop();
+  }
+
+  @Override public void resume() {
+    mTarget.resume();
+  }
+
+  @Override public void cancel() {
+    mTarget.cancel();
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/AbsDownloadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/AbsDownloadTarget.java
index f254db27..4662be8d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/AbsDownloadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/AbsDownloadTarget.java
@@ -40,6 +40,11 @@ abstract class AbsDownloadTarget<TARGET extends AbsTarget, ENTITY extends AbsEnt
    */
   String mTempFilePath;
 
+  /**
+   * {@code true}强制下载，不考虑文件路径是否被占用
+   */
+  boolean forceDownload = false;
+
   /**
    * 将任务设置为最高优先级任务，最高优先级任务有以下特点：
    * 1、在下载队列中，有且只有一个最高优先级任务
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/BaseNormalTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/BaseNormalTarget.java
index 154ecd1e..2873900a 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/BaseNormalTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/BaseNormalTarget.java
@@ -164,7 +164,7 @@ abstract class BaseNormalTarget<TARGET extends BaseNormalTarget>
 
     //设置文件保存路径，如果新文件路径和旧文件路径不同，则修改路径
     if (!filePath.equals(mEntity.getDownloadPath())) {
-      if (DbEntity.checkDataExist(DownloadEntity.class, "downloadPath=?", filePath)) {
+      if (DbEntity.checkDataExist(DownloadEntity.class, "downloadPath=?", filePath) && !forceDownload) {
         ALog.e(TAG, "下载失败，保存路径【" + filePath + "】已经被其它任务占用，请设置其它保存路径");
         return false;
       }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
index 9a35d94b..2380f54f 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
@@ -20,7 +20,8 @@ import android.support.annotation.NonNull;
 import android.text.TextUtils;
 import com.arialyy.aria.core.common.RequestEnum;
 import com.arialyy.aria.core.common.http.HttpHeaderDelegate;
-import com.arialyy.aria.core.inf.IHttpHeaderTarget;
+import com.arialyy.aria.core.common.http.PostDelegate;
+import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
 import com.arialyy.aria.core.manager.TEManager;
 import com.arialyy.aria.orm.DbEntity;
 import com.arialyy.aria.util.ALog;
@@ -38,7 +39,7 @@ import java.util.Set;
  * 下载任务组
  */
 public class DownloadGroupTarget extends BaseGroupTarget<DownloadGroupTarget> implements
-    IHttpHeaderTarget<DownloadGroupTarget> {
+    IHttpHeaderDelegate<DownloadGroupTarget> {
   private HttpHeaderDelegate<DownloadGroupTarget> mDelegate;
   /**
    * 子任务下载地址，
@@ -74,6 +75,13 @@ public class DownloadGroupTarget extends BaseGroupTarget<DownloadGroupTarget> im
     mDelegate = new HttpHeaderDelegate<>(this);
   }
 
+  /**
+   * Post处理
+   */
+  public PostDelegate asPost() {
+    return new PostDelegate<>(this);
+  }
+
   /**
    * 更新组合任务下载地址
    *
@@ -178,6 +186,12 @@ public class DownloadGroupTarget extends BaseGroupTarget<DownloadGroupTarget> im
         return false;
       }
 
+      if (mTaskEntity.getRequestEnum() == RequestEnum.POST) {
+        for (DownloadTaskEntity subTask : mTaskEntity.getSubTaskEntities()) {
+          subTask.setRequestEnum(RequestEnum.POST);
+        }
+      }
+
       mEntity.save();
       mTaskEntity.save();
 
@@ -262,7 +276,8 @@ public class DownloadGroupTarget extends BaseGroupTarget<DownloadGroupTarget> im
     if (!newName.equals(entity.getFileName())) {
       String oldPath = mEntity.getDirPath() + "/" + entity.getFileName();
       String newPath = mEntity.getDirPath() + "/" + newName;
-      if (DbEntity.checkDataExist(DownloadEntity.class, "downloadPath=? or isComplete='true'", newPath)) {
+      if (DbEntity.checkDataExist(DownloadEntity.class, "downloadPath=? or isComplete='true'",
+          newPath)) {
         ALog.w(TAG, String.format("更新文件名失败，路径【%s】已存在或文件已下载", newPath));
         return;
       }
@@ -313,14 +328,6 @@ public class DownloadGroupTarget extends BaseGroupTarget<DownloadGroupTarget> im
     return mDelegate.addHeaders(headers);
   }
 
-  @CheckResult
-  @Override public DownloadGroupTarget setRequestMode(RequestEnum requestEnum) {
-    for (DownloadTaskEntity subTask : mTaskEntity.getSubTaskEntities()) {
-      subTask.setRequestEnum(requestEnum);
-    }
-    return mDelegate.setRequestMode(requestEnum);
-  }
-
   @CheckResult
   @Override public DownloadGroupTarget setUrlProxy(Proxy proxy) {
     return mDelegate.setUrlProxy(proxy);
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
index 341d4d52..312f7aff 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
@@ -288,7 +288,7 @@ public class DownloadReceiver extends AbsReceiver {
    * @return {@code true}存在，{@code false} 不存在
    */
   public boolean taskExists(String downloadUrl) {
-    return DownloadEntity.findFirst(DownloadEntity.class, "url=?", downloadUrl) != null;
+    return DbEntity.checkDataExist(DownloadTaskEntity.class, "url=?", downloadUrl);
   }
 
   /**
@@ -301,8 +301,7 @@ public class DownloadReceiver extends AbsReceiver {
       return false;
     }
     String groupName = CommonUtil.getMd5Code(urls);
-    return DownloadGroupEntity.findFirst(DownloadGroupEntity.class, "groupName=?", groupName)
-        != null;
+    return DbEntity.checkDataExist(DownloadGroupEntity.class, "groupName=?", groupName);
   }
 
   /**
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
index b20ccebd..14ad617d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
@@ -19,7 +19,8 @@ import android.support.annotation.CheckResult;
 import android.support.annotation.NonNull;
 import com.arialyy.aria.core.common.RequestEnum;
 import com.arialyy.aria.core.common.http.HttpHeaderDelegate;
-import com.arialyy.aria.core.inf.IHttpHeaderTarget;
+import com.arialyy.aria.core.common.http.PostDelegate;
+import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
 import java.net.Proxy;
 import java.util.Map;
 
@@ -28,9 +29,8 @@ import java.util.Map;
  * https://github.com/AriaLyy/Aria
  */
 public class DownloadTarget extends BaseNormalTarget<DownloadTarget>
-    implements IHttpHeaderTarget<DownloadTarget> {
-  private HttpHeaderDelegate<DownloadTarget> mDelegate;
-
+    implements IHttpHeaderDelegate<DownloadTarget> {
+  private HttpHeaderDelegate<DownloadTarget> mHeaderDelegate;
 
   DownloadTarget(DownloadEntity entity, String targetName) {
     this(entity.getUrl(), targetName);
@@ -38,7 +38,14 @@ public class DownloadTarget extends BaseNormalTarget<DownloadTarget>
 
   DownloadTarget(String url, String targetName) {
     initTarget(url, targetName);
-    mDelegate = new HttpHeaderDelegate<>(this);
+    mHeaderDelegate = new HttpHeaderDelegate<>(this);
+  }
+
+  /**
+   * Post处理
+   */
+  public PostDelegate asPost() {
+    return new PostDelegate<>(this);
   }
 
   /**
@@ -78,6 +85,21 @@ public class DownloadTarget extends BaseNormalTarget<DownloadTarget>
     return this;
   }
 
+  /**
+   * 设置文件存储路径，如果需要修改新的文件名，修改路径便可。
+   * 如：原文件路径 /mnt/sdcard/test.zip
+   * 如果需要将test.zip改为game.zip，只需要重新设置文件路径为：/mnt/sdcard/game.zip
+   *
+   * @param filePath 路径必须为文件路径，不能为文件夹路径
+   * @param forceDownload {@code true}强制下载，不考虑未见路径是否被占用
+   */
+  @CheckResult
+  public DownloadTarget setFilePath(@NonNull String filePath, boolean forceDownload) {
+    mTempFilePath = filePath;
+    this.forceDownload = forceDownload;
+    return this;
+  }
+
   /**
    * 从header中获取文件描述信息
    */
@@ -89,7 +111,6 @@ public class DownloadTarget extends BaseNormalTarget<DownloadTarget>
     return HTTP;
   }
 
-
   /**
    * 设置URL的代理
    *
@@ -97,21 +118,17 @@ public class DownloadTarget extends BaseNormalTarget<DownloadTarget>
    */
   @CheckResult
   @Override public DownloadTarget setUrlProxy(Proxy proxy) {
-    return mDelegate.setUrlProxy(proxy);
+    return mHeaderDelegate.setUrlProxy(proxy);
   }
 
   @CheckResult
   @Override public DownloadTarget addHeader(@NonNull String key, @NonNull String value) {
-    return mDelegate.addHeader(key, value);
+    return mHeaderDelegate.addHeader(key, value);
   }
 
   @CheckResult
   @Override public DownloadTarget addHeaders(Map<String, String> headers) {
-    return mDelegate.addHeaders(headers);
+    return mHeaderDelegate.addHeaders(headers);
   }
 
-  @CheckResult
-  @Override public DownloadTarget setRequestMode(RequestEnum requestEnum) {
-    return mDelegate.setRequestMode(requestEnum);
-  }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java
index 0d046d50..f23f5f30 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTaskEntity.java
@@ -21,6 +21,7 @@ import com.arialyy.aria.orm.annotation.Foreign;
 import com.arialyy.aria.orm.annotation.Ignore;
 import com.arialyy.aria.orm.annotation.NoNull;
 import com.arialyy.aria.orm.annotation.Primary;
+import java.util.Map;
 
 /**
  * Created by lyy on 2017/1/23.
@@ -60,8 +61,6 @@ public class DownloadTaskEntity extends AbsNormalTaskEntity<DownloadEntity> {
       onUpdate = ActionPolicy.CASCADE, onDelete = ActionPolicy.CASCADE)
   private String key;
 
-
-
   public DownloadTaskEntity() {
   }
 
@@ -112,6 +111,4 @@ public class DownloadTaskEntity extends AbsNormalTaskEntity<DownloadEntity> {
   public void setGroupTask(boolean groupTask) {
     isGroupTask = groupTask;
   }
-
-
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/ConnectionHelp.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/ConnectionHelp.java
index a7b985a7..e5a78c25 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/ConnectionHelp.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/ConnectionHelp.java
@@ -100,6 +100,8 @@ class ConnectionHelp {
   static HttpURLConnection setConnectParam(DownloadTaskEntity entity, HttpURLConnection conn) {
     if (entity.getRequestEnum() == RequestEnum.POST) {
       conn.setDoInput(true);
+      conn.setDoOutput(true);
+      conn.setUseCaches(false);
     }
     Set<String> keys = null;
     if (entity.getHeaders() != null && entity.getHeaders().size() > 0) {
@@ -108,7 +110,9 @@ class ConnectionHelp {
         conn.setRequestProperty(key, entity.getHeaders().get(key));
       }
     }
-
+    if (conn.getRequestProperty("Accept-Language") == null) {
+      conn.setRequestProperty("Accept-Language", "UTF-8");
+    }
     if (conn.getRequestProperty("Accept-Encoding") == null) {
       conn.setRequestProperty("Accept-Encoding", "identity");
     }
@@ -126,7 +130,7 @@ class ConnectionHelp {
           "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");
     }
     if (conn.getRequestProperty("Accept") == null) {
-      StringBuilder accept = new StringBuilder();
+      //StringBuilder accept = new StringBuilder();
       //accept
       //.append("image/gif, ")
       //.append("image/jpeg, ")
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java
index c65b3800..fc87f934 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java
@@ -19,6 +19,7 @@ import android.text.TextUtils;
 import com.arialyy.aria.core.AriaManager;
 import com.arialyy.aria.core.common.CompleteInfo;
 import com.arialyy.aria.core.common.OnFileInfoCallback;
+import com.arialyy.aria.core.common.RequestEnum;
 import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.download.DownloadTaskEntity;
 import com.arialyy.aria.util.ALog;
@@ -28,9 +29,13 @@ import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.util.Map;
+import java.util.Set;
 
 /**
  * 下载文件信息获取
@@ -76,6 +81,23 @@ class HttpFileInfoThread implements Runnable {
   }
 
   private void handleConnect(HttpURLConnection conn) throws IOException {
+    if (mTaskEntity.getRequestEnum() == RequestEnum.POST) {
+      Map<String, String> params = mTaskEntity.getParams();
+      if (params != null) {
+        OutputStreamWriter dos = new OutputStreamWriter(conn.getOutputStream());
+        Set<String> keys = params.keySet();
+        StringBuilder sb = new StringBuilder();
+        for (String key : keys) {
+          sb.append(key).append("=").append(URLEncoder.encode(params.get(key))).append("&");
+        }
+        String url = sb.toString();
+        url = url.substring(0, url.length() - 1);
+        dos.write(url);
+        dos.flush();
+        dos.close();
+      }
+    }
+
     long len = conn.getContentLength();
     if (len < 0) {
       String temp = conn.getHeaderField("Content-Length");
@@ -122,7 +144,7 @@ class HttpFileInfoThread implements Runnable {
             if (temp.length > 1) {
               String newName = URLDecoder.decode(temp[1], "utf-8");
               mEntity.setServerFileName(newName);
-              fileRename(newName);
+              renameFile(newName);
               break;
             }
           }
@@ -184,7 +206,7 @@ class HttpFileInfoThread implements Runnable {
   /**
    * 重命名文件
    */
-  private void fileRename(String newName) {
+  private void renameFile(String newName) {
     if (TextUtils.isEmpty(newName)) {
       ALog.w(TAG, "重命名失败【服务器返回的文件名为空】");
       return;
@@ -219,7 +241,8 @@ class HttpFileInfoThread implements Runnable {
     mEntity.setRedirect(true);
     mEntity.setRedirectUrl(newUrl);
     String cookies = conn.getHeaderField("Set-Cookie");
-    conn = (HttpURLConnection) new URL(newUrl).openConnection();
+    URL url = new URL(CommonUtil.convertUrl(newUrl));
+    conn = ConnectionHelp.handleConnection(url, mTaskEntity);
     conn = ConnectionHelp.setConnectParam(mTaskEntity, conn);
     conn.setRequestProperty("Cookie", cookies);
     conn.setRequestProperty("Range", "bytes=" + 0 + "-");
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java
index 20575ff0..7e9534a3 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java
@@ -16,6 +16,7 @@
 package com.arialyy.aria.core.download.downloader;
 
 import com.arialyy.aria.core.common.AbsThreadTask;
+import com.arialyy.aria.core.common.RequestEnum;
 import com.arialyy.aria.core.common.StateConstance;
 import com.arialyy.aria.core.common.SubThreadConfig;
 import com.arialyy.aria.core.download.DownloadEntity;
@@ -28,13 +29,17 @@ import java.io.BufferedInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.net.URLEncoder;
 import java.nio.ByteBuffer;
 import java.nio.channels.Channels;
 import java.nio.channels.FileChannel;
 import java.nio.channels.ReadableByteChannel;
+import java.util.Map;
+import java.util.Set;
 
 /**
  * Created by lyy on 2017/1/18.
@@ -83,6 +88,23 @@ final class HttpThreadTask extends AbsThreadTask<DownloadEntity, DownloadTaskEnt
       conn.setConnectTimeout(mConnectTimeOut);
       conn.setReadTimeout(mReadTimeOut);  //设置读取流的等待时间,必须设置该参数
       conn.connect();
+      if (mTaskEntity.getRequestEnum() == RequestEnum.POST) {
+        Map<String, String> params = mTaskEntity.getParams();
+        if (params != null) {
+          OutputStreamWriter dos = new OutputStreamWriter(conn.getOutputStream());
+          Set<String> keys = params.keySet();
+          StringBuilder sb = new StringBuilder();
+          for (String key : keys) {
+            sb.append(key).append("=").append(URLEncoder.encode(params.get(key))).append("&");
+          }
+          String paramStr = sb.toString();
+          paramStr = paramStr.substring(0, paramStr.length() - 1);
+          dos.write(paramStr);
+          dos.flush();
+          dos.close();
+        }
+      }
+
       is = new BufferedInputStream(ConnectionHelp.convertInputStream(conn));
       if (isOpenDynamicFile) {
         readDynamicFile(is);
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java
index 96d44748..3eb6a485 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java
@@ -22,6 +22,7 @@ import com.arialyy.aria.core.command.ICmd;
 import com.arialyy.aria.core.command.normal.CancelCmd;
 import com.arialyy.aria.core.command.normal.NormalCmdFactory;
 import com.arialyy.aria.core.common.TaskRecord;
+import com.arialyy.aria.core.common.http.PostDelegate;
 import com.arialyy.aria.core.download.DownloadGroupEntity;
 import com.arialyy.aria.core.download.DownloadGroupTaskEntity;
 import com.arialyy.aria.core.download.DownloadTaskEntity;
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTaskEntity.java b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTaskEntity.java
index eba12e79..3e7331aa 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTaskEntity.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTaskEntity.java
@@ -70,6 +70,11 @@ public abstract class AbsTaskEntity<ENTITY extends AbsEntity> extends DbEntity {
    */
   @Ignore private boolean isNewTask = false;
 
+  /**
+   * 请求参数
+   */
+  @Ignore private Map<String, String> params;
+
   /**
    * 任务状态，和Entity的state同步
    */
@@ -256,4 +261,12 @@ public abstract class AbsTaskEntity<ENTITY extends AbsEntity> extends DbEntity {
   public void setCode(int code) {
     this.code = code;
   }
+
+  public Map<String, String> getParams() {
+    return params;
+  }
+
+  public void setParams(Map<String, String> params) {
+    this.params = params;
+  }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpHeaderTarget.java b/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpHeaderDelegate.java
similarity index 88%
rename from Aria/src/main/java/com/arialyy/aria/core/inf/IHttpHeaderTarget.java
rename to Aria/src/main/java/com/arialyy/aria/core/inf/IHttpHeaderDelegate.java
index 29ae6f52..80307556 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpHeaderTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpHeaderDelegate.java
@@ -26,7 +26,7 @@ import java.util.Map;
  * Created by laoyuyu on 2018/3/9.
  * HTTP Header功能接口
  */
-public interface IHttpHeaderTarget<TARGET extends ITarget> {
+public interface IHttpHeaderDelegate<TARGET extends ITarget> {
 
   /**
    * 给url请求添加Header数据
@@ -47,14 +47,6 @@ public interface IHttpHeaderTarget<TARGET extends ITarget> {
   @CheckResult
   TARGET addHeaders(Map<String, String> headers);
 
-  /**
-   * 设置HTTP请求类型
-   *
-   * @param requestEnum {@link RequestEnum}
-   */
-  @CheckResult
-  TARGET setRequestMode(RequestEnum requestEnum);
-
   @CheckResult
   TARGET setUrlProxy(Proxy proxy);
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/IPostDelegate.java b/Aria/src/main/java/com/arialyy/aria/core/inf/IPostDelegate.java
new file mode 100644
index 00000000..b5ace80a
--- /dev/null
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/IPostDelegate.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.inf;
+
+import java.util.Map;
+
+/**
+ * post 通用处理接口
+ */
+public interface IPostDelegate<TARGET extends ITarget> {
+
+  /**
+   * 设置Post请求参数
+   */
+  TARGET setParams(Map<String, String> params);
+
+  TARGET setParam(String key, String value);
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java
index a2be1ed4..63c3de42 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java
@@ -89,7 +89,7 @@ public class UploadReceiver extends AbsReceiver {
    * @return {@code true}存在，{@code false} 不存在
    */
   public boolean taskExists(String filePath) {
-    return DbEntity.findFirst(UploadEntity.class, "filePath=?", filePath) != null;
+    return DbEntity.checkDataExist(UploadTaskEntity.class, "key=?", filePath);
   }
 
   /**
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java
index 734ff20a..fdd91f7d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java
@@ -17,10 +17,10 @@ package com.arialyy.aria.core.upload;
 
 import android.support.annotation.CheckResult;
 import android.support.annotation.NonNull;
-import com.arialyy.aria.core.common.RequestEnum;
 import com.arialyy.aria.core.common.http.HttpHeaderDelegate;
+import com.arialyy.aria.core.common.http.PostDelegate;
 import com.arialyy.aria.core.inf.AbsTaskEntity;
-import com.arialyy.aria.core.inf.IHttpHeaderTarget;
+import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
 import java.net.Proxy;
 import java.util.Map;
 
@@ -29,7 +29,7 @@ import java.util.Map;
  * http 单文件上传
  */
 public class UploadTarget extends BaseNormalTarget<UploadTarget>
-    implements IHttpHeaderTarget<UploadTarget> {
+    implements IHttpHeaderDelegate<UploadTarget> {
   private HttpHeaderDelegate<UploadTarget> mDelegate;
 
   UploadTarget(String filePath, String targetName) {
@@ -46,6 +46,13 @@ public class UploadTarget extends BaseNormalTarget<UploadTarget>
     mDelegate = new HttpHeaderDelegate<>(this);
   }
 
+  /**
+   * Post处理
+   */
+  public PostDelegate asPost() {
+    return new PostDelegate<>(this);
+  }
+
   /**
    * 设置userAgent
    */
@@ -87,11 +94,6 @@ public class UploadTarget extends BaseNormalTarget<UploadTarget>
     return mDelegate.addHeaders(headers);
   }
 
-  @CheckResult
-  @Override public UploadTarget setRequestMode(RequestEnum requestEnum) {
-    return mDelegate.setRequestMode(requestEnum);
-  }
-
   @Override public UploadTarget setUrlProxy(Proxy proxy) {
     return mDelegate.setUrlProxy(proxy);
   }
diff --git a/Aria/src/main/java/com/arialyy/aria/orm/DelegateWrapper.java b/Aria/src/main/java/com/arialyy/aria/orm/DelegateWrapper.java
index 1c909eeb..e87c5b9d 100644
--- a/Aria/src/main/java/com/arialyy/aria/orm/DelegateWrapper.java
+++ b/Aria/src/main/java/com/arialyy/aria/orm/DelegateWrapper.java
@@ -56,13 +56,6 @@ public class DelegateWrapper {
     return INSTANCE;
   }
 
-  ///**
-  // * 保存关联数据
-  // */
-  //void saveRelationData(AbsWrapper wrapper){
-  //
-  //}
-
   /**
    * 查询关联表数据
    *
diff --git a/DEV_LOG.md b/DEV_LOG.md
index e911c570..717d4384 100644
--- a/DEV_LOG.md
+++ b/DEV_LOG.md
@@ -1,4 +1,16 @@
 ## 开发日志
+  + v_3.5.1
+    - 优化`taskExists`方法
+    - 添加`post`参数请求支持
+      ```java
+      Aria.download(SingleTaskActivity.this)
+              .load(DOWNLOAD_URL)
+              .setFilePath(path)
+              .asPost() // post请求
+              .setParam("key", "value") //传递参数
+              //.setParams(Map<String, String>) // 传递多参数
+              .start();
+      ```
   + v_3.5
     - fix bug https://github.com/AriaLyy/Aria/issues/302
     - fix bug https://github.com/AriaLyy/Aria/issues/283
diff --git a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
index 6ac0832b..5ba749c1 100644
--- a/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/download/SingleTaskActivity.java
@@ -42,6 +42,7 @@ import com.arialyy.simple.R;
 import com.arialyy.simple.base.BaseActivity;
 import com.arialyy.simple.databinding.ActivitySingleBinding;
 import java.io.File;
+import java.util.Map;
 
 public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
 
@@ -50,13 +51,14 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
       //"https://atom-installer.github.com/v1.13.0/AtomSetup.exe?s=1484074138&ext=.exe";
       //"http://static.gaoshouyou.com/d/22/94/822260b849944492caadd2983f9bb624.apk";
   //"https://yizi-kejian.oss-cn-beijing.aliyuncs.com/qimeng/package1/qmtable11.zip";
-  "http://rs.0.gaoshouyou.com/d/04/1e/400423a7551e1f3f0eb1812afa1f9b44.apk";
+  //"http://rs.0.gaoshouyou.com/d/04/1e/400423a7551e1f3f0eb1812afa1f9b44.apk";
       //"http://58.210.9.131/tpk/sipgt//TDLYZTGH.tpk"; //chunked 下载
       //"https://static.donguo.me//video/ip/course/pfys_1.mp4";
       //"https://www.baidu.com/link?url=_LFCuTPtnzFxVJByJ504QymRywIA1Z_T5xUxe9ZLuxcGM0C_RcdpWyB1eGjbJC-e5wv5wAKM4WmLMAS5KeF6EZJHB8Va3YqZUiaErqK_pxm&wd=&eqid=e8583fe70002d126000000065a99f864";
       //"https://d.pcs.baidu.com/file/a02c89a2d479d4fd2756f3313d42491d?fid=4232431903-250528-1114369760340736&dstime=1525491372&rt=sh&sign=FDtAERVY-DCb740ccc5511e5e8fedcff06b081203-3C13vkOkuk4TqXvVYW05zj1K0ao%3D&expires=8h&chkv=1&chkbd=0&chkpc=et&dp-logid=8651730921842106225&dp-callid=0&r=165533013";
       //"http://apk500.bce.baidu-mgame.com/game/67000/67734/20170622040827_oem_5502845.apk?r=1";
       //"https://dl.genymotion.com/releases/genymotion-2.12.1/genymotion-2.12.1-vbox.exe";
+      "http://9.9.9.59:5000/download/CentOS-7-x86_64-Minimal-1804.iso";
   @Bind(R.id.start) Button mStart;
   @Bind(R.id.stop) Button mStop;
   @Bind(R.id.cancel) Button mCancel;
@@ -234,6 +236,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
         //startActivity(new Intent(this, SingleTaskActivity.class));
         //Aria.download(this).unRegister();
         //Aria.download(this).load(DOWNLOAD_URL).removeRecord();
+        //Log.d(TAG, Aria.download(this).taskExists(DOWNLOAD_URL) + "");
         break;
       case R.id.cancel:
         Aria.download(this).load(DOWNLOAD_URL).cancel(true);
@@ -245,7 +248,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
   private void startD() {
     //Aria.get(this).setLogLevel(ALog.LOG_CLOSE);
     //Aria.download(this).load("aaaa.apk");
-    String path = Environment.getExternalStorageDirectory().getPath() + "/ggsg8.apk";
+    String path = Environment.getExternalStorageDirectory().getPath() + "/ggsg9.apk";
     //File file = new File(path);
     //if (file.exists()){
     //  file.delete();
@@ -260,6 +263,7 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
         //.useServerFileName(true)
         //.setRequestMode(RequestEnum.GET)
         .setFilePath(path)
+        .asPost().setParams("key", "value")
         //.setExtendField("{\n"
         //    + "\"id\":\"你的样子\"\n< > "
         //    + "}")
diff --git a/app/src/main/java/com/arialyy/simple/test/AnyRunnModule.java b/app/src/main/java/com/arialyy/simple/test/AnyRunnModule.java
index 5388313f..06d3ff43 100644
--- a/app/src/main/java/com/arialyy/simple/test/AnyRunnModule.java
+++ b/app/src/main/java/com/arialyy/simple/test/AnyRunnModule.java
@@ -67,7 +67,6 @@ public class AnyRunnModule {
     String path = Environment.getExternalStorageDirectory().getPath() + "/mmm2.mp4";
     Aria.download(this)
         .load(url)
-        .setRequestMode(RequestEnum.GET)
         .setFilePath(path)
         .resetState()
         .start();
diff --git a/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java b/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java
index 0304e8eb..048800c9 100644
--- a/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java
+++ b/app/src/main/java/com/arialyy/simple/upload/HttpUploadActivity.java
@@ -56,7 +56,7 @@ public class HttpUploadActivity extends BaseActivity<ActivityUploadBinding> {
             "http://lib-test.xzxyun.com:8042/Api/upload?data={\"type\":\"1\",\"fileType\":\".apk\"}")
         //.setUploadUrl("http://192.168.1.6:8080/upload/sign_file/").setAttachment("file")
         //.addHeader("iplanetdirectorypro", "11a09102fb934ad0bc206f9c611d7933")
-        .setRequestMode(RequestEnum.POST)
+        .asPost()
         .start();
   }
 
diff --git a/build.gradle b/build.gradle
index f2f07861..365135f9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -39,7 +39,7 @@ task clean(type: Delete) {
 ext {
   userOrg = 'arialyy'
   groupId = 'com.arialyy.aria'
-  publishVersion = '3.5_dev1'
+  publishVersion = '3.5'
 //  publishVersion = '1.0.3'  //FTP插件
   repoName='maven'
   desc = 'android 下载框架'
diff --git a/py/download.py b/py/download.py
new file mode 100644
index 00000000..e42927df
--- /dev/null
+++ b/py/download.py
@@ -0,0 +1,21 @@
+# coding=utf-8
+
+import os
+from flask import Flask, send_from_directory, request
+
+app = Flask(__name__)
+
+
+@app.route("/download/<path:filename>", methods=['POST', 'GET'])
+def downloader(filename):
+    """
+    不支持断点的下载
+    """
+    data = request.values.get('key')
+    print data
+    dirpath = 'D:/test'
+    return send_from_directory(dirpath, filename, as_attachment=True)  # as_attachment=True 一定要写，不然会变成打开，而不是下载
+
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', debug=True)  # 需要关闭防火墙
diff --git a/py/upload.py b/py/upload.py
new file mode 100644
index 00000000..7dd9ad97
--- /dev/null
+++ b/py/upload.py
@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+import os
+from flask import Flask, request, url_for, send_from_directory
+from werkzeug import secure_filename
+
+ALLOWED_EXTENSIONS = set(['png', 'jpg', 'jpeg', 'gif', 'rar', 'apk'])
+
+app = Flask(__name__)
+app.config['UPLOAD_FOLDER'] = 'd:/db/'
+app.config['MAX_CONTENT_LENGTH'] = 1600 * 1024 * 1024
+
+"""
+可以选择这个扩展
+Flask-Uploads
+"""
+
+html = '''
+    <!DOCTYPE html>
+    <title>Upload File</title>
+    <h1>图片上传</h1>
+    <form method=post enctype=multipart/form-data>
+         <input type=file name=file>
+         <input type=submit value=上传>
+    </form>
+    '''
+
+
+def allowed_file(filename):
+    return '.' in filename and \
+           filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS
+
+
+@app.route('/uploads/<filename>')
+def uploaded_file(filename):
+    return send_from_directory(app.config['UPLOAD_FOLDER'],
+                               filename)
+
+
+@app.route('/', methods=['GET', 'POST'])
+def test():
+    return'test'
+
+
+@app.route('/upload/', methods=['GET', 'POST'])
+def upload_file():
+    print 'upload'
+    if request.method == 'POST':
+        print 'post'
+        file = request.files['file']
+        print file
+        if file and allowed_file(file.filename):
+            print 'start save'
+            filename = secure_filename(file.filename)
+            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
+            # file_url = url_for('uploaded_file', filename=filename)
+            # return html + '<br><img src=' + file_url + '>'
+            return '200'
+    return '405'
+
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=5000)