diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/query/MPJQueryWrapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/query/MPJQueryWrapper.java
index b4b32c2..faebc59 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/query/MPJQueryWrapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/query/MPJQueryWrapper.java
@@ -270,7 +270,7 @@ public class MPJQueryWrapper<T> extends AbstractWrapper<T, String, MPJQueryWrapp
     @Override
     public MPJQueryWrapper<T> join(String keyWord, boolean condition, String joinSql) {
         if (condition) {
-            from.setStringValue(from.getStringValue() + keyWord + joinSql);
+            from.setStringValue(from.getStringValue() + StringPool.EMPTY + keyWord + StringPool.EMPTY + joinSql);
         }
         return typedThis;
     }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/Constant.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/Constant.java
index 560225a..2eaffab 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/Constant.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/toolkit/Constant.java
@@ -33,19 +33,19 @@ public interface Constant {
     String LEFT_JOIN = StringPool.SPACE + LEFT + StringPool.SPACE + JOIN + StringPool.SPACE;
 
     /**
-     * " RIGHT JOIN "
+     * "RIGHT JOIN"
      */
-    String RIGHT_JOIN = StringPool.SPACE + RIGHT + StringPool.SPACE + JOIN + StringPool.SPACE;
+    String RIGHT_JOIN = RIGHT + StringPool.SPACE + JOIN;
 
     /**
-     * " INNER JOIN "
+     * "INNER JOIN"
      */
-    String INNER_JOIN = StringPool.SPACE + INNER + StringPool.SPACE + JOIN + StringPool.SPACE;
+    String INNER_JOIN = INNER + StringPool.SPACE + JOIN;
 
     /**
-     * " FULL JOIN "
+     * "FULL JOIN"
      */
-    String FULL_JOIN = StringPool.SPACE + FULL + StringPool.SPACE + JOIN + StringPool.SPACE;
+    String FULL_JOIN = FULL + StringPool.SPACE + JOIN;
 
     /**
      * " t"
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
index 10c0c22..b02bad9 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
@@ -191,7 +191,9 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
             StringBuilder value = new StringBuilder();
             for (MPJLambdaWrapper<?> wrapper : onWrappers) {
                 String tableName = TableInfoHelper.getTableInfo(wrapper.getJoinClass()).getTableName();
-                value.append(wrapper.getKeyWord())
+                value.append(StringPool.SPACE)
+                        .append(wrapper.getKeyWord())
+                        .append(StringPool.SPACE)
                         .append(tableName)
                         .append(Constant.SPACE_TABLE_ALIAS)
                         .append(tableList.get(wrapper.getJoinClass(), wrapper.getIndex()).getIndex())
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryJoin.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryJoin.java
index b3760de..9b6a0b9 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryJoin.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/QueryJoin.java
@@ -205,16 +205,66 @@ public interface QueryJoin<Children, Entity> extends MPJBaseJoin<Entity> {
         return join(Constant.FULL_JOIN, clazz, function, ext);
     }
 
-
     /**
+     * 自定义连表关键词
      * 调用此方法 keyword 前后需要带空格 比如 " LEFT JOIN "  " RIGHT JOIN "
      * <p>
      * 查询基类 可以直接调用此方法实现以上所有功能
      *
-     * @param keyWord  连表关键字
-     * @param clazz    连表实体类
-     * @param function 关联条件
-     * @param ext      扩展 用于关联表的 select 和 where
+     * @param keyWord 连表关键字
+     * @param clazz   连表实体类
+     * @param left    关联条件
+     * @param right   扩展 用于关联表的 select 和 where
+     */
+    default <T, X> Children join(String keyWord, Class<T> clazz, SFunction<T, ?> left, SFunction<X, ?> right) {
+        return join(keyWord, clazz, on -> on.eq(left, right));
+    }
+
+    /**
+     * 自定义连表关键词
+     *
+     * @param left  条件
+     * @param right 条件
+     */
+    default <T, X> Children join(String keyWord, SFunction<T, ?> left, SFunction<X, ?> right) {
+        return join(keyWord, LambdaUtils.getEntityClass(left), on -> on.eq(left, right));
+    }
+
+    /**
+     * 自定义连表关键词
+     * <p>
+     * 例 leftJoin(UserDO.class, on -> on.eq(UserDO::getId,UserAddressDO::getUserId).le().gt()...)
+     *
+     * @param clazz    关联实体类
+     * @param function 条件
+     */
+    default <T> Children join(String keyWord, Class<T> clazz, WrapperFunction<Entity> function) {
+        return join(keyWord, clazz, function, null);
+    }
+
+    /**
+     * 自定义连表关键词
+     *
+     * @param clazz 关联的实体类
+     * @param left  条件
+     * @param right 条件
+     */
+    default <T, X> Children join(String keyWord, Class<T> clazz, SFunction<T, ?> left, SFunction<X, ?> right, WrapperFunction<Entity> ext) {
+        return join(keyWord, clazz, on -> on.eq(left, right), ext);
+    }
+
+    /**
+     * 自定义连表关键词
+     *
+     * @param left  条件
+     * @param right 条件
+     */
+    default <T, X> Children join(String keyWord, SFunction<T, ?> left, SFunction<X, ?> right, WrapperFunction<Entity> ext) {
+        return join(keyWord, LambdaUtils.getEntityClass(left), on -> on.eq(left, right), ext);
+    }
+
+    /**
+     * 内部使用, 不建议直接调用
      */
     <T> Children join(String keyWord, Class<T> clazz, WrapperFunction<Entity> function, WrapperFunction<Entity> ext);
 }
diff --git a/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java b/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java
index 24564f6..6656290 100644
--- a/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java
+++ b/mybatis-plus-join-test/test-join/src/test/java/com/github/yulichang/test/join/LambdaWrapperTest.java
@@ -1,5 +1,6 @@
 package com.github.yulichang.test.join;
 
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.github.yulichang.test.join.dto.AddressDTO;
@@ -264,4 +265,15 @@ class LambdaWrapperTest {
         assert list.get(0).get("ADDRESS") != null;
         list.forEach(System.out::println);
     }
+
+    /**
+     * 关联查询返回map
+     */
+    @Test
+    void testMP() {
+        List<UserDO> dos = userMapper.selectList(new LambdaQueryWrapper<UserDO>()
+                .gt(UserDO::getId, 3)
+                .lt(UserDO::getId, 8));
+        assert dos.size() == 4;
+    }
 }