introduce dubbo.version

Author: robberphex

mse-simple-demo/A/pom.xml

@@ -23,6 +23,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>8</java.version>
         <spring-cloud.version>2021.0.4</spring-cloud.version>
+        <dubbo.version>2.7.18</dubbo.version>
     </properties>
 
     <dependencies>
@@ -64,19 +65,19 @@
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo</artifactId>
-            <version>2.7.18</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo-spring-boot-starter</artifactId>
-            <version>2.7.15</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo-registry-nacos</artifactId>
-            <version>2.7.15</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>

mse-simple-demo/B/pom.xml

@@ -23,6 +23,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>8</java.version>
         <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
+        <dubbo.version>2.7.18</dubbo.version>
     </properties>
 
     <dependencies>
@@ -49,19 +50,19 @@
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo</artifactId>
-            <version>2.7.18</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo-spring-boot-starter</artifactId>
-            <version>2.7.15</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo-registry-nacos</artifactId>
-            <version>2.7.15</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>

mse-simple-demo/C/pom.xml

@@ -23,6 +23,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>8</java.version>
         <spring-cloud.version>Edgware.SR2</spring-cloud.version>
+        <dubbo.version>2.7.18</dubbo.version>
     </properties>
 
     <dependencies>
@@ -55,7 +56,7 @@
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo</artifactId>
-            <version>2.7.18</version>
+            <version>${dubbo.version}</version>
             <exclusions>
                 <exclusion>
                     <groupId>io.netty</groupId>
@@ -67,13 +68,13 @@
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo-spring-boot-starter</artifactId>
-            <version>2.7.15</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo-registry-nacos</artifactId>
-            <version>2.7.15</version>
+            <version>${dubbo.version}</version>
         </dependency>
 
         <dependency>