diff --git a/ufile-sample-java/pom.xml b/ufile-sample-java/pom.xml
index ee113dc..b7060ea 100644
--- a/ufile-sample-java/pom.xml
+++ b/ufile-sample-java/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>cn.ucloud.ufile</groupId>
     <artifactId>ufile-sample-java</artifactId>
-    <version>1.0.1</version>
+    <version>1.0.2</version>
 
     <build>
         <plugins>
@@ -55,8 +55,8 @@
         <dependency>
             <groupId>cn.ucloud.ufile</groupId>
             <artifactId>ufile-client-java</artifactId>
-            <version>2.6.6</version>
+            <version>2.6.7</version>
         </dependency>
     </dependencies>
 
-</project>
\ No newline at end of file
+</project>
diff --git a/ufile-sample-java/src/main/java/cn/ucloud/ufile/sample/object/RenameObjectSample.java b/ufile-sample-java/src/main/java/cn/ucloud/ufile/sample/object/RenameObjectSample.java
deleted file mode 100644
index 3d3a186..0000000
--- a/ufile-sample-java/src/main/java/cn/ucloud/ufile/sample/object/RenameObjectSample.java
+++ /dev/null
@@ -1,75 +0,0 @@
-package cn.ucloud.ufile.sample.object;
-
-import cn.ucloud.ufile.UfileClient;
-import cn.ucloud.ufile.api.ApiError;
-import cn.ucloud.ufile.api.object.ObjectConfig;
-import cn.ucloud.ufile.bean.UfileErrorBean;
-import cn.ucloud.ufile.bean.base.BaseObjectResponseBean;
-import cn.ucloud.ufile.exception.UfileClientException;
-import cn.ucloud.ufile.exception.UfileServerException;
-import cn.ucloud.ufile.http.UfileCallback;
-import cn.ucloud.ufile.sample.Constants;
-import cn.ucloud.ufile.util.JLog;
-import okhttp3.Request;
-
-
-/**
- * @author: joshua
- * @E-mail: joshua.yin@ucloud.cn
- * @date: 2018-12-11 14:32
- */
-public class RenameObjectSample {
-    private static final String TAG = "RenameObjectSample";
-    private static ObjectConfig config = new ObjectConfig("cn-sh2", "ufileos.com");
-
-    public static void main(String[] args) {
-        String bucketName = "";
-        String keyName = "";
-        String newKeyName = "";
-        boolean isForceToCover = false;
-        renameObject(bucketName, keyName, newKeyName, isForceToCover);
-    }
-
-    public static void renameObject(String bucketName, String keyName, String newKeyName, boolean isForceToCover) {
-        try {
-            BaseObjectResponseBean response = UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
-                    .renameObject(bucketName, keyName)
-                    .isRenamedTo(newKeyName)
-                    /**
-                     * 如果已存在同名文件，值为true则覆盖，否则操作失败；请求中若不携带该参数，默认不覆盖
-                     */
-//                    .isForcedToCover(isForceToCover)
-                    .execute();
-            JLog.D(TAG, String.format("[res] = %s", (response == null ? "null" : response.toString())));
-        } catch (UfileClientException e) {
-            e.printStackTrace();
-        } catch (UfileServerException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static void renameObjectAsync(String bucketName, String keyName, String newKeyName, boolean isForceToCover) {
-        UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
-                .renameObject(bucketName, keyName)
-                .isRenamedTo(newKeyName)
-                /**
-                 * 如果已存在同名文件，值为true则覆盖，否则操作失败；请求中若不携带该参数，默认不覆盖
-                 */
-//                    .isForcedToCover(isForceToCover)
-                .executeAsync(new UfileCallback<BaseObjectResponseBean>() {
-
-                    @Override
-                    public void onResponse(BaseObjectResponseBean response) {
-                        JLog.D(TAG, String.format("[res] = %s", (response == null ? "null" : response.toString())));
-                    }
-
-                    @Override
-                    public void onError(Request request, ApiError error, UfileErrorBean response) {
-                        JLog.D(TAG, String.format("[error] = %s\n[info] = %s",
-                                (error == null ? "null" : error.toString()),
-                                (response == null ? "null" : response.toString())));
-                    }
-                });
-    }
-
-}
diff --git a/ufile-sample-java/src/main/java/cn/ucloud/ufile/sample/object/UploadHitSample.java b/ufile-sample-java/src/main/java/cn/ucloud/ufile/sample/object/UploadHitSample.java
deleted file mode 100644
index ce5cc60..0000000
--- a/ufile-sample-java/src/main/java/cn/ucloud/ufile/sample/object/UploadHitSample.java
+++ /dev/null
@@ -1,107 +0,0 @@
-package cn.ucloud.ufile.sample.object;
-
-import cn.ucloud.ufile.UfileClient;
-import cn.ucloud.ufile.api.ApiError;
-import cn.ucloud.ufile.api.object.ObjectConfig;
-import cn.ucloud.ufile.bean.base.BaseObjectResponseBean;
-import cn.ucloud.ufile.bean.UfileErrorBean;
-import cn.ucloud.ufile.exception.UfileClientException;
-import cn.ucloud.ufile.exception.UfileServerException;
-import cn.ucloud.ufile.http.UfileCallback;
-import cn.ucloud.ufile.sample.Constants;
-import cn.ucloud.ufile.util.JLog;
-import okhttp3.Request;
-
-import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.InputStream;
-
-/**
- * @author: joshua
- * @E-mail: joshua.yin@ucloud.cn
- * @date: 2018-12-11 14:32
- */
-public class UploadHitSample {
-    private static final String TAG = "UploadHitSample";
-    private static ObjectConfig config = new ObjectConfig("cn-sh2", "ufileos.com");
-
-    public static void main(String[] args) {
-        File file = new File("");
-        InputStream is = new ByteArrayInputStream(new byte[]{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07});
-        String keyName = "";
-        String bucketName = "";
-        uploadHitFile(file, keyName, bucketName);
-    }
-
-    public static void uploadHitFile(File file, String nameAs, String toBucket) {
-        try {
-            BaseObjectResponseBean response = UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
-                    .uploadHit(file)
-                    .nameAs(nameAs)
-                    .toBucket(toBucket)
-                    .execute();
-            JLog.D(TAG, String.format("[res] = %s", (response == null ? "null" : response.toString())));
-        } catch (UfileClientException e) {
-            e.printStackTrace();
-        } catch (UfileServerException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static void uploadHitFileAsync(File file, String nameAs, String toBucket) {
-        UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
-                .uploadHit(file)
-                .nameAs(nameAs)
-                .toBucket(toBucket)
-                .executeAsync(new UfileCallback<BaseObjectResponseBean>() {
-
-                    @Override
-                    public void onResponse(BaseObjectResponseBean response) {
-                        JLog.D(TAG, String.format("[res] = %s", (response == null ? "null" : response.toString())));
-                    }
-
-                    @Override
-                    public void onError(Request request, ApiError error, UfileErrorBean response) {
-                        JLog.D(TAG, String.format("[error] = %s\n[info] = %s",
-                                (error == null ? "null" : error.toString()),
-                                (response == null ? "null" : response.toString())));
-                    }
-                });
-    }
-
-    public static void uploadHitStream(InputStream stream, String nameAs, String toBucket) {
-        try {
-            BaseObjectResponseBean response = UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
-                    .uploadHit(stream)
-                    .nameAs(nameAs)
-                    .toBucket(toBucket)
-                    .execute();
-            JLog.D(TAG, String.format("[res] = %s", (response == null ? "null" : response.toString())));
-        } catch (UfileClientException e) {
-            e.printStackTrace();
-        } catch (UfileServerException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static void uploadHitStreamAsync(InputStream stream, String nameAs, String toBucket) {
-        UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
-                .uploadHit(stream)
-                .nameAs(nameAs)
-                .toBucket(toBucket)
-                .executeAsync(new UfileCallback<BaseObjectResponseBean>() {
-
-                    @Override
-                    public void onResponse(BaseObjectResponseBean response) {
-                        JLog.D(TAG, String.format("[res] = %s", (response == null ? "null" : response.toString())));
-                    }
-
-                    @Override
-                    public void onError(Request request, ApiError error, UfileErrorBean response) {
-                        JLog.D(TAG, String.format("[error] = %s\n[info] = %s",
-                                (error == null ? "null" : error.toString()),
-                                (response == null ? "null" : response.toString())));
-                    }
-                });
-    }
-}
diff --git a/ufile/pom.xml b/ufile/pom.xml
index e430a57..13b9f30 100644
--- a/ufile/pom.xml
+++ b/ufile/pom.xml
@@ -132,7 +132,7 @@
                 <artifactId>maven-gpg-plugin</artifactId>
                 <version>${plugin.maven.gpg.version}</version>
                 <configuration>
-                    <skip>true</skip>
+                    <skip>false</skip>
                 </configuration>
                 <executions>
                     <execution>
@@ -143,6 +143,18 @@
                     </execution>
                 </executions>
             </plugin>
+            <!-- 中央仓库发布 -->
+            <plugin>
+                <groupId>org.sonatype.plugins</groupId>
+                <artifactId>nexus-staging-maven-plugin</artifactId>
+                <version>1.6.7</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <serverId>sonatype-nexus-staging</serverId>
+                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+                    <autoReleaseAfterClose>true</autoReleaseAfterClose>
+                </configuration>
+            </plugin>
         </plugins>
     </build>