code style clean

sharding-core/sharding-core-execute/src/main/java/org/apache/shardingsphere/sharding/execute/metadata/loader/ShardingTableMetaDataLoader.java

@@ -17,20 +17,9 @@
 
 package org.apache.shardingsphere.sharding.execute.metadata.loader;
 
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashSet;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-
+import com.google.common.base.Optional;
+import com.google.common.collect.Lists;
+import lombok.RequiredArgsConstructor;
 import org.apache.shardingsphere.core.metadata.column.ShardingGeneratedKeyColumnMetaData;
 import org.apache.shardingsphere.core.rule.DataNode;
 import org.apache.shardingsphere.core.rule.ShardingRule;
@@ -48,10 +37,19 @@ import org.apache.shardingsphere.underlying.executor.engine.ExecutorEngine;
 import org.apache.shardingsphere.underlying.executor.engine.GroupedCallback;
 import org.apache.shardingsphere.underlying.executor.engine.InputGroup;
 
-import com.google.common.base.Optional;
-import com.google.common.collect.Lists;
-
-import lombok.RequiredArgsConstructor;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
 
 /**
  * Table meta data loader for sharding.