diff --git a/core/pom.xml b/core/pom.xml
index 91451806213d0a4ea5740b88ae4d6a0e1ad906e4..4d29d55d1cc4ac73fb7b2c0f25407a35742e9f4d 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -6,13 +6,16 @@
         <artifactId>sureness</artifactId>
         <groupId>com.usthe.sureness</groupId>
         <version>0.0.2</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>sureness-core</artifactId>
     <name>sureness</name>
     <url>https://github.com/tomsun28/sureness</url>
-    <description>The Protection For Restful Api</description>
+    <description>
+        Sureness is a simple and efficient open-source security framework that focus on protection for restful api.
+    </description>
     <version>0.0.2</version>
 
     <licenses>
@@ -43,21 +46,20 @@
     </scm>
 
     <properties>
-        <slf4j.version>1.7.21</slf4j.version>
         <jjwt.version>0.9.0</jjwt.version>
         <yaml.version>1.17</yaml.version>
+        <servlet.api.version>3.1.0</servlet.api.version>
     </properties>
     <dependencies>
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
-            <version>3.1.0</version>
+            <version>${servlet.api.version}</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>${slf4j.version}</version>
         </dependency>
         <!-- jwt util -->
         <dependency>
@@ -76,12 +78,10 @@
         <dependency>
             <groupId>javax.xml.bind</groupId>
             <artifactId>jaxb-api</artifactId>
-            <version>2.3.0</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/pom.xml b/pom.xml
index 02e748e889f63e03f6db8c752aabd75b971e2295..b28c4eedadb43a690cf06d17ff31ab6e7682eccb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,8 +17,39 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
+        <slf4j.version>1.7.21</slf4j.version>
+        <xml.bind.version>2.3.0</xml.bind.version>
+        <!-- Test 3rd-party dependencies: -->
+        <junit.version>4.12</junit.version>
+        <easymock.version>4.0.2</easymock.version>
     </properties>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>javax.xml.bind</groupId>
+                <artifactId>jaxb-api</artifactId>
+                <version>${xml.bind.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-api</artifactId>
+                <version>${slf4j.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.easymock</groupId>
+                <artifactId>easymock</artifactId>
+                <version>${easymock.version}</version>
+                <scope>test</scope>
+            </dependency>
+            <dependency>
+                <groupId>junit</groupId>
+                <artifactId>junit</artifactId>
+                <version>${junit.version}</version>
+                <scope>test</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
 
     <build>
         <plugins>
diff --git a/sample-bootstrap/src/main/java/com/usthe/sureness/sample/bootstrap/controller/AccountController.java b/sample-bootstrap/src/main/java/com/usthe/sureness/sample/bootstrap/controller/AccountController.java
index c4f66c6c08245c260b0910c51f4b851be237dc1f..b43e80a641ab8365b307bfdb26f35df6398ee899 100644
--- a/sample-bootstrap/src/main/java/com/usthe/sureness/sample/bootstrap/controller/AccountController.java
+++ b/sample-bootstrap/src/main/java/com/usthe/sureness/sample/bootstrap/controller/AccountController.java
@@ -10,12 +10,9 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RequestPart;
 import org.springframework.web.bind.annotation.RestController;
 
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
@@ -28,6 +25,7 @@ import java.util.UUID;
 @RestController()
 public class AccountController {
 
+    private static final String APP_ID = "appId";
     /**
      * 账户数据提供
      */
@@ -41,7 +39,7 @@ public class AccountController {
      */
     @PostMapping("/api/v1/account/auth")
     public ResponseEntity<Object> login(@RequestBody Map<String,String> requestBody) {
-        if (requestBody == null || !requestBody.containsKey("appId")
+        if (requestBody == null || !requestBody.containsKey(APP_ID)
                 || !requestBody.containsKey("password")) {
             return ResponseEntity.badRequest().build();
         }