add dependencies for transaction-xa-spring-boot.

sharding-jdbc-example/transaction-example/transaction-2pc-xa-example/transaction-xa-spring-boot-example/pom.xml

@@ -11,4 +11,31 @@
 
     <artifactId>transaction-xa-spring-boot-example</artifactId>
 
+    <dependencies>
+        <dependency>
+            <groupId>io.shardingsphere</groupId>
+            <artifactId>repository-jpa</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.shardingsphere</groupId>
+            <artifactId>sharding-transaction-xa-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.shardingsphere</groupId>
+            <artifactId>sharding-transaction-spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.shardingsphere</groupId>
+            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+    </dependencies>
 </project>