clean the codes

Author: jameszhan

Diff for: .gitignore

@@ -0,0 +1,18 @@
+.DS_Store
+
+*.iml
+*.iws
+*.ipr
+
+.idea
+.jupyter
+.ipynb_checkpoints
+
+*.tmp
+*.jar
+*.zip
+*.class
+*.classpath
+
+
+target/

Diff for: pom.xml

@@ -11,12 +11,13 @@
     <packaging>jar</packaging>
 
     <properties>
-        <slf4j.version>1.7.30</slf4j.version>
-        <log4j.version>1.2.17</log4j.version>
-        <junit.version>4.13</junit.version>
         <java_source_version>1.8</java_source_version>
         <java_target_version>1.8</java_target_version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <slf4j.version>1.7.30</slf4j.version>
+        <log4j.version>1.2.17</log4j.version>
+        <junit.version>4.13</junit.version>
+        <spring.version>5.2.12.RELEASE</spring.version>
     </properties>
 
     <build>
@@ -61,61 +62,49 @@
             <dependency>
                 <groupId>com.alibaba</groupId>
                 <artifactId>fastjson</artifactId>
-                <version>1.2.73</version>
-            </dependency>
-
-            <dependency>
-                <groupId>org.eclipse.sisu</groupId>
-                <artifactId>org.eclipse.sisu.plexus</artifactId>
-                <version>0.0.0.M5</version>
-            </dependency>
-
-            <dependency>
-                <groupId>org.codehaus.plexus</groupId>
-                <artifactId>plexus-classworlds</artifactId>
-                <version>2.5.1</version>
+                <version>1.2.75</version>
             </dependency>
 
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-core</artifactId>
-                <version>5.2.8.RELEASE</version>
+                <version>${spring.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-beans</artifactId>
-                <version>5.2.8.RELEASE</version>
+                <version>${spring.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-context</artifactId>
-                <version>5.2.8.RELEASE</version>
+                <version>${spring.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-context-support</artifactId>
-                <version>5.2.8.RELEASE</version>
+                <version>${spring.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-tx</artifactId>
-                <version>5.2.8.RELEASE</version>
+                <version>${spring.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-aspects</artifactId>
-                <version>5.2.8.RELEASE</version>
+                <version>${spring.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>com.google.guava</groupId>
                 <artifactId>guava</artifactId>
-                <version>29.0-jre</version>
+                <version>30.1-jre</version>
             </dependency>
 
             <dependency>