diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/JoinWrappers.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/JoinWrappers.java
index 3ca5df2..bc28162 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/JoinWrappers.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/JoinWrappers.java
@@ -17,7 +17,6 @@ public class JoinWrappers {
         return new MPJQueryWrapper<>();
     }
 
-
     /**
      * JoinWrappers.<UserDO>query(User.class)
      */
@@ -25,6 +24,13 @@ public class JoinWrappers {
         return new MPJQueryWrapper<>(clazz);
     }
 
+    /**
+     * JoinWrappers.<UserDO>query(user)
+     */
+    public static <T> MPJQueryWrapper<T> query(T entity) {
+        return new MPJQueryWrapper<>(entity);
+    }
+
     /**
      * JoinWrappers.<UserDO>lambda()
      */
@@ -38,4 +44,11 @@ public class JoinWrappers {
     public static <T> MPJLambdaWrapper<T> lambda(Class<T> clazz) {
         return new MPJLambdaWrapper<>(clazz);
     }
+
+    /**
+     * JoinWrappers.<UserDO>lambda(user)
+     */
+    public static <T> MPJLambdaWrapper<T> lambda(T entity) {
+        return new MPJLambdaWrapper<>(entity);
+    }
 }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/MPJWrappers.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/MPJWrappers.java
index 89e05b5..13abf50 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/MPJWrappers.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/MPJWrappers.java
@@ -19,6 +19,10 @@ public class MPJWrappers {
         return new MPJQueryWrapper<>();
     }
 
+    public static <T> MPJQueryWrapper<T> queryJoin(T entity) {
+        return new MPJQueryWrapper<>(entity);
+    }
+
     public static <T> MPJQueryWrapper<T> queryJoin(Class<T> entityClass) {
         return new MPJQueryWrapper<>(entityClass);
     }
@@ -30,6 +34,10 @@ public class MPJWrappers {
         return new MPJLambdaWrapper<>();
     }
 
+    public static <T> MPJLambdaWrapper<T> lambdaJoin(T entity) {
+        return new MPJLambdaWrapper<>(entity);
+    }
+
     public static <T> MPJLambdaWrapper<T> lambdaJoin(Class<T> entityClass) {
         return new MPJLambdaWrapper<>(entityClass);
     }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/SqlHelper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/SqlHelper.java
index 91e7f1b..8fcdc47 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/SqlHelper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/SqlHelper.java
@@ -30,7 +30,7 @@ public class SqlHelper {
         Assert.notNull(mapperClass, "mapper not find by class <%s>", entityClass.getSimpleName());
         Object mapper = SpringContentUtils.getBean(mapperClass);
         Assert.notNull(mapper, "mapper not init <%s>", entityClass.getSimpleName());
-        Assert.isTrue(mapper instanceof MPJBaseMapper, "mapper not extends MPJBaseMapper <%s>", entityClass.getSimpleName());
+        Assert.isTrue(mapper instanceof MPJBaseMapper, "mapper <%s> not extends MPJBaseMapper ", entityClass.getSimpleName());
         return function.apply((MPJBaseMapper<T>) mapper);
     }
 }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Chain.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Chain.java
index f60477b..8875483 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Chain.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Chain.java
@@ -25,7 +25,8 @@ public interface Chain<T> {
     Class<T> getEntityClass();
 
     /**
-     * 链式调用
+     * 链式调用 等效于 selectOne
+     * <p>
      * 构造方法不须传 class 或 entity 否则会报错
      * new MPJLambdaWrapper(User.class)
      * new MPJQueryWrapper(User.class)
@@ -37,7 +38,8 @@ public interface Chain<T> {
     }
 
     /**
-     * 链式调用
+     * 链式调用 等效于 selectJoinOne
+     * <p>
      * 构造方法不须传 class 或 entity 否则会报错
      * new MPJLambdaWrapper(User.class)
      * new MPJQueryWrapper(User.class)
@@ -49,7 +51,8 @@ public interface Chain<T> {
     }
 
     /**
-     * 链式调用
+     * 链式调用 查询列表第一个 匹配多个不会抛异常
+     * <p>
      * 构造方法不须传 class 或 entity 否则会报错
      * new MPJLambdaWrapper(User.class)
      * new MPJQueryWrapper(User.class)
@@ -62,7 +65,8 @@ public interface Chain<T> {
     }
 
     /**
-     * 链式调用
+     * 链式调用 查询列表第一个 匹配多个不会抛异常
+     * <p>
      * 构造方法不须传 class 或 entity 否则会报错
      * new MPJLambdaWrapper(User.class)
      * new MPJQueryWrapper(User.class)
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryLabel.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryLabel.java
index 34dc0a1..c6ad490 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryLabel.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryLabel.java
@@ -12,6 +12,12 @@ import java.lang.reflect.Field;
 import java.util.Collection;
 import java.util.Map;
 
+/**
+ * 对一或对多查询
+ *
+ * @author yulichang
+ * @since 1.3.0
+ */
 @SuppressWarnings({"unchecked", "unused"})
 public interface QueryLabel<Children> {