support JDK 1.7 features

src/main/java/com/alibaba/druid/pool/DruidPooledCallableStatement.java

@@ -1068,11 +1068,11 @@ public class DruidPooledCallableStatement extends DruidPooledPreparedStatement i
     }
 
     public <T> T getObject(int parameterIndex, Class<T> type) throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        return stmt.getObject(parameterIndex, type);
     }
 
     public <T> T getObject(String parameterName, Class<T> type) throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        return stmt.getObject(parameterName, type);
     }
 
     @SuppressWarnings("unchecked")

src/main/java/com/alibaba/druid/pool/DruidPooledStatement.java

@@ -879,10 +879,10 @@ public class DruidPooledStatement extends PoolableWrapper implements Statement {
     }
 
     public void closeOnCompletion() throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        stmt.closeOnCompletion();
     }
 
     public boolean isCloseOnCompletion() throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        stmt.isCloseOnCompletion();
     }
 }

src/main/java/com/alibaba/druid/proxy/jdbc/CallableStatementProxyImpl.java

@@ -603,11 +603,11 @@ public class CallableStatementProxyImpl extends PreparedStatementProxyImpl imple
     }
 
     public <T> T getObject(int parameterIndex, Class<T> type) throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        return statement.getObject(parameterIndex, type);
     }
 
     public <T> T getObject(String parameterName, Class<T> type) throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        return statement.getObject(parameterName, type);
     }
 
     @SuppressWarnings("unchecked")

src/main/java/com/alibaba/druid/proxy/jdbc/StatementProxyImpl.java

@@ -503,11 +503,11 @@ public class StatementProxyImpl extends WrapperProxyImpl implements StatementPro
     }
 
     public void closeOnCompletion() throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        statement.closeOnCompletion();
     }
 
     public boolean isCloseOnCompletion() throws SQLException {
-        throw new SQLFeatureNotSupportedException();
+        statement.isCloseOnCompletion();
     }
 
     @Override