diff --git a/src/main/java/com/github/yulichang/toolkit/BiHashMap.java b/src/main/java/com/github/yulichang/toolkit/BiHashMap.java
deleted file mode 100644
index 83969c4..0000000
--- a/src/main/java/com/github/yulichang/toolkit/BiHashMap.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package com.github.yulichang.toolkit;
-
-import java.util.HashMap;
-import java.util.Map;
-
-public class BiHashMap<K, V, E> {
-
-    private final Map<K, Map<V, E>> map;
-
-    public BiHashMap() {
-        this.map = new HashMap<>();
-    }
-
-
-    public E get(K k, V v) {
-        return map.containsKey(k) ? map.get(k).get(v) : null;
-    }
-
-    public void put(K k, V v, E e) {
-        if (map.containsKey(k)) {
-            map.get(k).put(v, e);
-        } else {
-            Map<V, E> veMap = new HashMap<>();
-            veMap.put(v, e);
-            map.put(k, veMap);
-        }
-    }
-}
diff --git a/src/main/java/com/github/yulichang/toolkit/UniqueList.java b/src/main/java/com/github/yulichang/toolkit/UniqueList.java
deleted file mode 100644
index 03b9d6e..0000000
--- a/src/main/java/com/github/yulichang/toolkit/UniqueList.java
+++ /dev/null
@@ -1,71 +0,0 @@
-package com.github.yulichang.toolkit;
-
-import com.baomidou.mybatisplus.core.toolkit.StringUtils;
-
-import java.util.ArrayList;
-import java.util.Collection;
-
-/**
- * 查询字段集合
- *
- * @author yulichang
- * @since 1.2.5
- */
-public class UniqueList<T extends UniqueObject> extends ArrayList<T> implements UniqueObject {
-
-    private String uniqueKey;
-
-    @Override
-    public String getUniqueKey() {
-        if (StringUtils.isBlank(uniqueKey)) {
-            StringBuilder sb = new StringBuilder();
-            for (UniqueObject ub : this) {
-                sb.append(ub.getUniqueKey());
-            }
-            this.uniqueKey = sb.toString();
-        }
-        return this.uniqueKey;
-    }
-
-    @Override
-    public boolean add(T t) {
-        this.uniqueKey = null;
-        return super.add(t);
-    }
-
-    @Override
-    public boolean remove(Object o) {
-        this.uniqueKey = null;
-        return super.remove(o);
-    }
-
-    @Override
-    public boolean addAll(Collection<? extends T> c) {
-        this.uniqueKey = null;
-        return super.addAll(c);
-    }
-
-    @Override
-    public boolean addAll(int index, Collection<? extends T> c) {
-        this.uniqueKey = null;
-        return super.addAll(index, c);
-    }
-
-    @Override
-    public boolean removeAll(Collection<?> c) {
-        this.uniqueKey = null;
-        return super.removeAll(c);
-    }
-
-    @Override
-    protected void removeRange(int fromIndex, int toIndex) {
-        this.uniqueKey = null;
-        super.removeRange(fromIndex, toIndex);
-    }
-
-    @Override
-    public void clear() {
-        this.uniqueKey = null;
-        super.clear();
-    }
-}
diff --git a/src/main/java/com/github/yulichang/toolkit/UniqueObject.java b/src/main/java/com/github/yulichang/toolkit/UniqueObject.java
deleted file mode 100644
index bb514ac..0000000
--- a/src/main/java/com/github/yulichang/toolkit/UniqueObject.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package com.github.yulichang.toolkit;
-
-/**
- * 类唯一标识
- *
- * @author yulichang
- * @since 1.2.5
- */
-public interface UniqueObject {
-
-    /**
-     * 获取类唯一标识
-     */
-    String getUniqueKey();
-}
diff --git a/src/main/java/com/github/yulichang/toolkit/support/SelectColumn.java b/src/main/java/com/github/yulichang/toolkit/support/SelectColumn.java
index 11ab02c..1d4d96c 100644
--- a/src/main/java/com/github/yulichang/toolkit/support/SelectColumn.java
+++ b/src/main/java/com/github/yulichang/toolkit/support/SelectColumn.java
@@ -1,14 +1,10 @@
 package com.github.yulichang.toolkit.support;
 
 import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
-import com.baomidou.mybatisplus.core.toolkit.StringPool;
 import com.baomidou.mybatisplus.core.toolkit.StringUtils;
-import com.github.yulichang.toolkit.UniqueObject;
 import com.github.yulichang.wrapper.enums.BaseFuncEnum;
 import lombok.Getter;
 
-import java.util.Objects;
-
 /**
  * MPJLambdaWrapper 查询字段
  *
@@ -16,7 +12,7 @@ import java.util.Objects;
  * @since 1.2.5
  */
 @Getter
-public class SelectColumn implements UniqueObject {
+public class SelectColumn {
 
     /**
      * 字段实体类
@@ -77,13 +73,4 @@ public class SelectColumn implements UniqueObject {
             tagProperty = StringUtils.getTargetColumn(tagProperty);
         return new SelectColumn(clazz, columnName, tableFieldInfo, alias, tagProperty, keyType, label, funcEnum);
     }
-
-    /**
-     * 获取唯一标识
-     */
-    @Override
-    public String getUniqueKey() {
-        return String.join(StringPool.AMPERSAND, clazz.getName(), columnName, alias,
-                Objects.isNull(funcEnum) ? null : funcEnum.getSql());
-    }
 }
diff --git a/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java b/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
index a6406e4..df44de3 100644
--- a/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
+++ b/src/main/java/com/github/yulichang/wrapper/MPJLambdaWrapper.java
@@ -57,7 +57,7 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
      * 查询的字段
      */
     @Getter
-    private final List<SelectColumn> selectColumns = new UniqueList<>();
+    private final List<SelectColumn> selectColumns = new ArrayList<>();
     /**
      * ON sql wrapper集合
      */
diff --git a/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java b/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java
index d0249b6..99675e7 100644
--- a/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java
+++ b/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java
@@ -4,11 +4,9 @@ import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.baomidou.mybatisplus.core.metadata.TableInfo;
 import com.baomidou.mybatisplus.core.metadata.TableInfoHelper;
 import com.baomidou.mybatisplus.core.toolkit.Assert;
-import com.baomidou.mybatisplus.core.toolkit.StringPool;
 import com.baomidou.mybatisplus.core.toolkit.StringUtils;
 import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
 import com.github.yulichang.toolkit.LambdaUtils;
-import com.github.yulichang.toolkit.UniqueObject;
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.Setter;
@@ -23,7 +21,7 @@ import org.apache.ibatis.type.TypeHandler;
  */
 @Getter
 @Setter(AccessLevel.PACKAGE)
-public class Result implements UniqueObject {
+public class Result {
 
     private boolean isId;
 
@@ -42,10 +40,6 @@ public class Result implements UniqueObject {
     public Result() {
     }
 
-    @Override
-    public String getUniqueKey() {
-        return String.join(StringPool.DASH, String.valueOf(isId), property, column);
-    }
 
     @SuppressWarnings({"UnusedReturnValue", "unused"})
     public static class Builder<E, T> {