diff --git a/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/AllStatementHandlerInterceptor.java b/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/AllStatementHandlerInterceptor.java
index 009275a432333fca80be063c5a1622cf8c7b3e25..e7dc6e5fa49bba66b577abde18378150589c06e2 100644
--- a/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/AllStatementHandlerInterceptor.java
+++ b/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/AllStatementHandlerInterceptor.java
@@ -79,8 +79,8 @@ public class AllStatementHandlerInterceptor extends
 			Object parameterObject=metaObject.getValue("parameterHandler.parameterObject");
 			BoundSql boundSql = statement.getBoundSql();
 			String sql = boundSql.getSql();
-			_logger.debug("prepare  boundSql : "+sql);
-			_logger.trace("startsWith select : "+sql.toLowerCase().trim().startsWith("select"));
+			_logger.debug("prepare  boundSql : {}" , sql);
+			_logger.trace("startsWith select : {}" , sql.toLowerCase().trim().startsWith("select"));
 			if (sql.toLowerCase().trim().startsWith("select") && (parameterObject instanceof JpaBaseEntity)) {
 				if(statement instanceof SimpleStatementHandler){
 					sql = dialect.getLimitString(sql, (JpaBaseEntity)parameterObject);
diff --git a/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/MyBatisSessionFactoryBean.java b/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/MyBatisSessionFactoryBean.java
index 7287e7557c45145dfbb6c56436d42cc535bb219b..6a39f96810f9fc38f99fa3e05ee3333b2b2fec09 100644
--- a/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/MyBatisSessionFactoryBean.java
+++ b/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/MyBatisSessionFactoryBean.java
@@ -52,7 +52,7 @@ public class MyBatisSessionFactoryBean extends SqlSessionFactoryBean {
 		
 		
 		Configuration config = factory.getConfiguration();
-		_logger.debug("buildSqlSessionFactory : "+config.toString());
+		_logger.debug("buildSqlSessionFactory : {}" , config.toString());
 		for (Interceptor interceptor : interceptors) {
 			config.addInterceptor(interceptor);
 		}
@@ -61,10 +61,10 @@ public class MyBatisSessionFactoryBean extends SqlSessionFactoryBean {
 		statementHandlerInterceptor.setDialectString(Dialect.getDialect(dialect));
 		config.addInterceptor(statementHandlerInterceptor);
 		
-		_logger.debug("DefaultStatementTimeout : "+ config.getDefaultStatementTimeout());
+		_logger.debug("DefaultStatementTimeout : {}" , config.getDefaultStatementTimeout());
 		config.setDefaultStatementTimeout(timeout);
-		_logger.debug("after change ,DefaultStatementTimeout : "+ config.getDefaultStatementTimeout());
-		_logger.debug(""+config.getMappedStatementNames());
+		_logger.debug("after change ,DefaultStatementTimeout : {}" , config.getDefaultStatementTimeout());
+		_logger.debug("MappedStatementNames {}" , config.getMappedStatementNames());
 		return factory;
 	}
 	
diff --git a/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/StatementHandlerInterceptor.java b/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/StatementHandlerInterceptor.java
index 019e407f1abd19fce4182669fd54e04e7f705a09..a13e7b85e31d072f34d37614025b75dbbe7b2d2e 100644
--- a/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/StatementHandlerInterceptor.java
+++ b/mybatis-jpa-extra-core/src/main/java/org/apache/mybatis/jpa/StatementHandlerInterceptor.java
@@ -67,12 +67,12 @@ public class StatementHandlerInterceptor extends AbstractStatementHandlerInterce
 			Object parameterObject=metaObject.getValue("parameterHandler.parameterObject");
 			BoundSql boundSql = statement.getBoundSql();
 			String sql = boundSql.getSql();
-			_logger.trace("parameter object  ==> "+parameterObject);
+			_logger.trace("parameter object  ==> {}" , parameterObject);
 			if ((parameterObject instanceof JpaPagination)
 					&& (sql.toLowerCase().trim().startsWith("select")) ) {
 				JpaPagination pagination=(JpaPagination)parameterObject;
 				if(pagination.isPageable()){
-					_logger.trace("prepare  boundSql  ==> "+removeBreakingWhitespace(sql));
+					_logger.trace("prepare  boundSql  ==> {}" , removeBreakingWhitespace(sql));
 					if(statement instanceof SimpleStatementHandler){
 						sql = dialect.getLimitString(sql, pagination);
 					}else if(statement instanceof PreparedStatementHandler){
@@ -82,7 +82,7 @@ public class StatementHandlerInterceptor extends AbstractStatementHandlerInterce
 								);
 						sql = dialect.getLimitString(sql, pagination);
 					}
-					_logger.trace("prepare dialect boundSql : "+removeBreakingWhitespace(sql));
+					_logger.trace("prepare dialect boundSql : {}" , removeBreakingWhitespace(sql));
 					metaObject.setValue("boundSql.sql", sql);
 				}