diff --git a/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoader.java b/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoader.java
index bcdf6119e6..c5da0afd39 100644
--- a/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoader.java
+++ b/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoader.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.loader;
 
 import java.util.Properties;
diff --git a/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoaderFactory.java b/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoaderFactory.java
index 6cf5c2a0f9..fa7527819b 100644
--- a/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoaderFactory.java
+++ b/src/main/java/com/alibaba/druid/filter/config/loader/ConfigLoaderFactory.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.loader;
 
 import com.alibaba.druid.support.logging.Log;
@@ -58,7 +73,7 @@ public class ConfigLoaderFactory {
             for (String key : p.stringPropertyNames()) {
                 String clazzName = p.getProperty(key);
                 System.out.println(clazzName);
-                Class clazz = classLoader.loadClass(clazzName);
+                Class<?> clazz = classLoader.loadClass(clazzName);
                 ConfigLoader configLoader = (ConfigLoader) clazz.newInstance();
 
                 addConfigLoader(configLoader);
diff --git a/src/main/java/com/alibaba/druid/filter/config/loader/impl/FileConfigLoader.java b/src/main/java/com/alibaba/druid/filter/config/loader/impl/FileConfigLoader.java
index 6a03eeba58..c60ecf867f 100644
--- a/src/main/java/com/alibaba/druid/filter/config/loader/impl/FileConfigLoader.java
+++ b/src/main/java/com/alibaba/druid/filter/config/loader/impl/FileConfigLoader.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.loader.impl;
 
 import com.alibaba.druid.filter.config.loader.ConfigLoader;
diff --git a/src/main/java/com/alibaba/druid/filter/config/loader/impl/HttpConfigLoader.java b/src/main/java/com/alibaba/druid/filter/config/loader/impl/HttpConfigLoader.java
index 5eeb45edb4..19ae01f14c 100644
--- a/src/main/java/com/alibaba/druid/filter/config/loader/impl/HttpConfigLoader.java
+++ b/src/main/java/com/alibaba/druid/filter/config/loader/impl/HttpConfigLoader.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.loader.impl;
 
 import com.alibaba.druid.filter.config.loader.ConfigLoader;
diff --git a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/AbstractDecrypter.java b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/AbstractDecrypter.java
index a58c94ceaa..3c2ff942dd 100644
--- a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/AbstractDecrypter.java
+++ b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/AbstractDecrypter.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.security.decrypter;
 
 import com.alibaba.druid.util.Base64;
diff --git a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecryptException.java b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecryptException.java
index 450450b137..c2d755a59e 100644
--- a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecryptException.java
+++ b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecryptException.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.security.decrypter;
 
 /**
@@ -6,6 +21,8 @@ package com.alibaba.druid.filter.config.security.decrypter;
  * @author Jonas Yang
  */
 public class DecryptException extends Exception {
+    private static final long serialVersionUID = 1L;
+
     public DecryptException() {
         super();
     }
diff --git a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/Decrypter.java b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/Decrypter.java
index a922806f0c..8a8c82f3ce 100644
--- a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/Decrypter.java
+++ b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/Decrypter.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.security.decrypter;
 
 import java.util.Properties;
diff --git a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecrypterFactory.java b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecrypterFactory.java
index 93dc6d389d..0a061d6f4a 100644
--- a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecrypterFactory.java
+++ b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/DecrypterFactory.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.security.decrypter;
 
 import com.alibaba.druid.support.logging.Log;
diff --git a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/RsaDecrypter.java b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/RsaDecrypter.java
index 0203a5f9d5..114ec7c19a 100644
--- a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/RsaDecrypter.java
+++ b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/RsaDecrypter.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.security.decrypter;
 
 import com.alibaba.druid.support.logging.Log;
diff --git a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/SensitiveParameters.java b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/SensitiveParameters.java
index 473f1baf22..d53a0061f6 100644
--- a/src/main/java/com/alibaba/druid/filter/config/security/decrypter/SensitiveParameters.java
+++ b/src/main/java/com/alibaba/druid/filter/config/security/decrypter/SensitiveParameters.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.druid.filter.config.security.decrypter;
 
 /**