diff --git a/src/main/java/org/apache/ibatis/binding/MapperMethod.java b/src/main/java/org/apache/ibatis/binding/MapperMethod.java
index b51f1e1926..f62ba57d7b 100644
--- a/src/main/java/org/apache/ibatis/binding/MapperMethod.java
+++ b/src/main/java/org/apache/ibatis/binding/MapperMethod.java
@@ -194,6 +194,7 @@ public static class SqlCommand {
     private final SqlCommandType type;
 
     public SqlCommand(Configuration configuration, Class<?> mapperInterface, Method method) {
+      //接口全限定名+点+方法名称 如 com.jd.UserDao.findOne
       String statementName = mapperInterface.getName() + "." + method.getName();
       MappedStatement ms = null;
       if (configuration.hasStatement(statementName)) {
diff --git a/src/main/java/org/apache/ibatis/builder/BaseBuilder.java b/src/main/java/org/apache/ibatis/builder/BaseBuilder.java
index 79f1071f15..be2b2a122d 100644
--- a/src/main/java/org/apache/ibatis/builder/BaseBuilder.java
+++ b/src/main/java/org/apache/ibatis/builder/BaseBuilder.java
@@ -33,7 +33,7 @@
  */
 /**
  * 构建器的基类，建造者模式
- *
+ * 也有模板模式
  */
 public abstract class BaseBuilder {
   //需要配置，类型别名注册，类型处理器注册3个东西
diff --git a/src/main/java/org/apache/ibatis/builder/xml/XMLConfigBuilder.java b/src/main/java/org/apache/ibatis/builder/xml/XMLConfigBuilder.java
index 0977563db9..a13a409f82 100644
--- a/src/main/java/org/apache/ibatis/builder/xml/XMLConfigBuilder.java
+++ b/src/main/java/org/apache/ibatis/builder/xml/XMLConfigBuilder.java
@@ -428,7 +428,16 @@ private void databaseIdProviderElement(XNode context) throws Exception {
     }
   }
 
+  /**在构建Configuration对象时添加了 type="JDBC" 对应的事务工厂
+   * public Configuration() {
+   *     //注册更多的类型别名，至于为何不直接在TypeAliasRegistry里注册，还需进一步研究
+   *     typeAliasRegistry.registerAlias("JDBC", JdbcTransactionFactory.class);
+   * @param context
+   * @return
+   * @throws Exception
+   */
   //7.1事务管理器
+
 //<transactionManager type="JDBC">
 //  <property name="..." value="..."/>
 //</transactionManager>
diff --git a/src/main/java/org/apache/ibatis/executor/BaseExecutor.java b/src/main/java/org/apache/ibatis/executor/BaseExecutor.java
index a5d6eab48d..69d177d5f5 100644
--- a/src/main/java/org/apache/ibatis/executor/BaseExecutor.java
+++ b/src/main/java/org/apache/ibatis/executor/BaseExecutor.java
@@ -47,7 +47,7 @@
  */
 /**
  * 执行器基类
- * 
+ * 模板模式
  */
 public abstract class BaseExecutor implements Executor {
 
diff --git a/src/main/java/org/apache/ibatis/executor/statement/BaseStatementHandler.java b/src/main/java/org/apache/ibatis/executor/statement/BaseStatementHandler.java
index 01b66b7028..84ff25b68b 100644
--- a/src/main/java/org/apache/ibatis/executor/statement/BaseStatementHandler.java
+++ b/src/main/java/org/apache/ibatis/executor/statement/BaseStatementHandler.java
@@ -38,7 +38,7 @@
  */
 /**
  * 语句处理器的基类
- * 
+ * 模板模式
  */
 public abstract class BaseStatementHandler implements StatementHandler {
 
diff --git a/src/main/java/org/apache/ibatis/executor/statement/RoutingStatementHandler.java b/src/main/java/org/apache/ibatis/executor/statement/RoutingStatementHandler.java
index bd075ea4a4..6f551d81b4 100644
--- a/src/main/java/org/apache/ibatis/executor/statement/RoutingStatementHandler.java
+++ b/src/main/java/org/apache/ibatis/executor/statement/RoutingStatementHandler.java
@@ -33,7 +33,8 @@
  */
 /**
  * 路由选择语句处理器,有点像代理模式
- * 
+ * 大方向是委托模式
+ * 细节是策略模式，根据不同类型，选择不同处理策略
  */
 public class RoutingStatementHandler implements StatementHandler {
 
diff --git a/src/main/java/org/apache/ibatis/jdbc/SqlRunner.java b/src/main/java/org/apache/ibatis/jdbc/SqlRunner.java
index e812c9d11d..879d09b030 100644
--- a/src/main/java/org/apache/ibatis/jdbc/SqlRunner.java
+++ b/src/main/java/org/apache/ibatis/jdbc/SqlRunner.java
@@ -56,7 +56,7 @@ public void setUseGeneratedKeySupport(boolean useGeneratedKeySupport) {
     this.useGeneratedKeySupport = useGeneratedKeySupport;
   }
 
-  /*
+  /**
    * Executes a SELECT statement that returns one row.
    *
    * @param sql  The SQL
@@ -72,7 +72,7 @@ public Map<String, Object> selectOne(String sql, Object... args) throws SQLExcep
     return results.get(0);
   }
 
-  /*
+  /**
    * Executes a SELECT statement that returns multiple rows.
    *
    * @param sql  The SQL
@@ -95,7 +95,7 @@ public List<Map<String, Object>> selectAll(String sql, Object... args) throws SQ
     }
   }
 
-  /*
+  /**
    * Executes an INSERT statement.
    *
    * @param sql  The SQL
@@ -141,7 +141,7 @@ public int insert(String sql, Object... args) throws SQLException {
     }
   }
 
-  /*
+  /**
    * Executes an UPDATE statement.
    *
    * @param sql  The SQL
@@ -163,7 +163,7 @@ public int update(String sql, Object... args) throws SQLException {
     }
   }
 
-  /*
+  /**
    * Executes a DELETE statement.
    *
    * @param sql  The SQL
@@ -175,7 +175,7 @@ public int delete(String sql, Object... args) throws SQLException {
     return update(sql, args);
   }
 
-  /*
+  /**
    * Executes any string as a JDBC Statement.
    * Good for DDL
    *
diff --git a/src/main/java/org/apache/ibatis/mapping/MappedStatement.java b/src/main/java/org/apache/ibatis/mapping/MappedStatement.java
index bd8cdd81cd..c51a50bd18 100644
--- a/src/main/java/org/apache/ibatis/mapping/MappedStatement.java
+++ b/src/main/java/org/apache/ibatis/mapping/MappedStatement.java
@@ -33,12 +33,15 @@
  */
 /**
  * 映射的语句
- *
+ * 对应一个mapper中的insert update delete select 标签的完整内容
  */
 public final class MappedStatement {
 
   private String resource;
   private Configuration configuration;
+  /**
+   * insert update delete select 标签中设置的 id
+   */
   private String id;
   private Integer fetchSize;
   private Integer timeout;
diff --git a/src/main/java/org/apache/ibatis/session/Configuration.java b/src/main/java/org/apache/ibatis/session/Configuration.java
index 7940418414..d36f818df2 100644
--- a/src/main/java/org/apache/ibatis/session/Configuration.java
+++ b/src/main/java/org/apache/ibatis/session/Configuration.java
@@ -126,7 +126,7 @@ public class Configuration {
   //对象工厂和对象包装器工厂
   protected ObjectFactory objectFactory = new DefaultObjectFactory();
   protected ObjectWrapperFactory objectWrapperFactory = new DefaultObjectWrapperFactory();
-  //映射注册机
+  //映射注册器
   protected MapperRegistry mapperRegistry = new MapperRegistry(this);
 
   //默认禁用延迟加载
@@ -142,6 +142,7 @@ public class Configuration {
    */
   protected Class<?> configurationFactory;
 
+  //拦截器执行链，pagehelper插件就是通过自定义拦截器实现分页
   protected final InterceptorChain interceptorChain = new InterceptorChain();
   //类型处理器注册机
   protected final TypeHandlerRegistry typeHandlerRegistry = new TypeHandlerRegistry();
diff --git a/src/main/java/org/apache/ibatis/session/SqlSession.java b/src/main/java/org/apache/ibatis/session/SqlSession.java
index f675f1865d..e74dfed000 100644
--- a/src/main/java/org/apache/ibatis/session/SqlSession.java
+++ b/src/main/java/org/apache/ibatis/session/SqlSession.java
@@ -86,6 +86,7 @@ public interface SqlSession extends Closeable {
    * 这一点。
    *
    * 一般情况下公司都会编写自己的Mybatis 物理分页插件
+   * 可以使用第三方开源分页插件 比如 pagehelper 使用的是Mybatis的拦截器实现
    * @param <E> the returned list element type
    * @param statement Unique identifier matching the statement to use.
    * @param parameter A parameter object to pass to the statement.
diff --git a/src/main/java/org/apache/ibatis/type/BaseTypeHandler.java b/src/main/java/org/apache/ibatis/type/BaseTypeHandler.java
index 1cd1c55627..6f62929f2a 100644
--- a/src/main/java/org/apache/ibatis/type/BaseTypeHandler.java
+++ b/src/main/java/org/apache/ibatis/type/BaseTypeHandler.java
@@ -28,7 +28,7 @@
  */
 /**
  * 类型处理器的基类
- * 
+ * 模板模式
  */
 public abstract class BaseTypeHandler<T> extends TypeReference<T> implements TypeHandler<T> {