From 943c48b801dcefd79d3c5d9088fcce8b73bb6f3b Mon Sep 17 00:00:00 2001
From: yulichang <570810310@qq.com>
Date: Thu, 16 Mar 2023 19:13:24 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E4=B8=8D=E9=99=90=E5=88=B6?=
 =?UTF-8?q?=E7=B1=BB=E5=9E=8B=E7=9A=84=E6=98=A0=E5=B0=84=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../yulichang/interceptor/MPJInterceptor.java |  13 +-
 .../yulichang/wrapper/MPJLambdaWrapper.java   |   6 +-
 .../wrapper/interfaces/QueryLabel.java        |  31 ++-
 .../yulichang/wrapper/resultmap/Label.java    |  16 ++
 .../wrapper/resultmap/MybatisLabel.java       |  42 ++-
 .../wrapper/resultmap/MybatisLabelFree.java   | 245 ++++++++++++++++++
 .../yulichang/wrapper/resultmap/Result.java   |  13 +-
 .../wrapper/resultmap/ResultList.java         |  21 ++
 .../test/join/LambdaWrapperTest.java          |  25 ++
 9 files changed, 389 insertions(+), 23 deletions(-)
 create mode 100644 mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Label.java
 create mode 100644 mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabelFree.java
 create mode 100644 mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/ResultList.java

diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/interceptor/MPJInterceptor.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/interceptor/MPJInterceptor.java
index de31730..f3e51eb 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/interceptor/MPJInterceptor.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/interceptor/MPJInterceptor.java
@@ -10,7 +10,7 @@ import com.github.yulichang.toolkit.Constant;
 import com.github.yulichang.toolkit.MPJReflectionKit;
 import com.github.yulichang.toolkit.TableHelper;
 import com.github.yulichang.wrapper.MPJLambdaWrapper;
-import com.github.yulichang.wrapper.resultmap.MybatisLabel;
+import com.github.yulichang.wrapper.resultmap.Label;
 import com.github.yulichang.wrapper.resultmap.Result;
 import com.github.yulichang.wrapper.segments.Select;
 import com.github.yulichang.wrapper.segments.SelectLabel;
@@ -190,7 +190,7 @@ public class MPJInterceptor implements Interceptor {
         }
         if (wrapper.isResultMap()) {
             for (Object o : wrapper.getResultMapMybatisLabel()) {
-                MybatisLabel<?, ?> label = (MybatisLabel<?, ?>) o;
+                Label<?> label = (Label<?>) o;
                 resultMappings.add(buildResult(ms, label, columnSet, columnList));
             }
         }
@@ -214,15 +214,13 @@ public class MPJInterceptor implements Interceptor {
     /**
      * @return 返回节点id
      */
-    private ResultMapping buildResult(MappedStatement ms, MybatisLabel<?, ?> mybatisLabel, Set<String> columnSet,
+    private ResultMapping buildResult(MappedStatement ms, Label<?> mybatisLabel, Set<String> columnSet,
                                       List<Select> columnList) {
         List<Result> resultList = mybatisLabel.getResultList();
         if (CollectionUtils.isEmpty(resultList)) {
             return null;
         }
         StringBuilder childId = new StringBuilder("MPJ_")
-                .append(mybatisLabel.getEntityClass().getName())
-                .append(StringPool.UNDERSCORE)
                 .append(mybatisLabel.getOfType().getName())
                 .append(StringPool.UNDERSCORE)
                 .append(mybatisLabel.getProperty())
@@ -235,7 +233,7 @@ public class MPJInterceptor implements Interceptor {
             String columnName = StringUtils.getTargetColumn(r.getSelectNormal().getColumn());
             SelectLabel label;
             Field field = ofTypeField.get(r.getProperty());
-            String index = mybatisLabel.getIndex();
+            String index = r.getIndex();
             if (columnSet.contains(columnName)) {
                 columnName = getColumn(columnSet, columnName, 0);
                 label = new SelectLabel(r.getSelectNormal(), null, mybatisLabel.getOfType(), field, columnName, StringUtils.isNotBlank(index), index);
@@ -269,7 +267,8 @@ public class MPJInterceptor implements Interceptor {
         if (CollectionUtils.isNotEmpty(mybatisLabel.getMybatisLabels())) {
             //递归调用
             childId.append("[");
-            for (MybatisLabel<?, ?> o : mybatisLabel.getMybatisLabels()) {
+            for (Object it : mybatisLabel.getMybatisLabels()) {
+                Label<?> o = (Label<?>) it;
                 if (Objects.isNull(o)) {
                     continue;
                 }
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 a494479..1cef1c2 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
@@ -14,7 +14,7 @@ import com.github.yulichang.wrapper.interfaces.Chain;
 import com.github.yulichang.wrapper.interfaces.Query;
 import com.github.yulichang.wrapper.interfaces.QueryJoin;
 import com.github.yulichang.wrapper.interfaces.QueryLabel;
-import com.github.yulichang.wrapper.resultmap.MybatisLabel;
+import com.github.yulichang.wrapper.resultmap.Label;
 import com.github.yulichang.wrapper.segments.Select;
 import com.github.yulichang.wrapper.segments.SelectCache;
 import com.github.yulichang.wrapper.segments.SelectNormal;
@@ -50,7 +50,7 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
      * 映射关系
      */
     @Getter
-    private final List<MybatisLabel<?, ?>> resultMapMybatisLabel = new ArrayList<>();
+    private final List<Label<?>> resultMapMybatisLabel = new ArrayList<>();
     /**
      * 是否有表别名
      */
@@ -187,7 +187,7 @@ public class MPJLambdaWrapper<T> extends MPJAbstractLambdaWrapper<T, MPJLambdaWr
     }
 
     @Override
-    public void addLabel(MybatisLabel<?, ?> label) {
+    public void addLabel(Label<?> label) {
         this.resultMap = true;
         this.resultMapMybatisLabel.add(label);
     }
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 c6ad490..4f050d5 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
@@ -5,8 +5,10 @@ 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.MPJReflectionKit;
+import com.github.yulichang.wrapper.resultmap.Label;
 import com.github.yulichang.wrapper.resultmap.MFunc;
 import com.github.yulichang.wrapper.resultmap.MybatisLabel;
+import com.github.yulichang.wrapper.resultmap.MybatisLabelFree;
 
 import java.lang.reflect.Field;
 import java.util.Collection;
@@ -21,7 +23,7 @@ import java.util.Map;
 @SuppressWarnings({"unchecked", "unused"})
 public interface QueryLabel<Children> {
 
-    void addLabel(MybatisLabel<?, ?> label);
+    void addLabel(Label<?> label);
 
     Children getChildren();
 
@@ -104,6 +106,21 @@ public interface QueryLabel<Children> {
         return selectCollection(null, child, dtoField, collection);
     }
 
+    default <S, Z, F extends java.util.Collection<Z>> Children selectCollection(SFunction<S, F> dtoField,
+                                                                                MFunc<MybatisLabelFree.Builder<Z>> collection) {
+        //自由映射必须存在泛型Z
+        String dtoFieldName = LambdaUtils.getName(dtoField);
+        Class<S> dtoClass = LambdaUtils.getEntityClass(dtoField);
+        Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+        //获取集合泛型
+        Class<?> genericType = MPJReflectionKit.getGenericType(field);
+        Class<Z> ofType = (Class<Z>) genericType;
+        MybatisLabelFree.Builder<Z> builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), ofType);
+        MybatisLabelFree.Builder<Z> czBuilder = collection.apply(builder);
+        addLabel(czBuilder.build());
+        return getChildren();
+    }
+
     default <S, C, Z, F extends java.util.Collection<Z>> Children selectCollection(String prefix,
                                                                                    Class<C> child,
                                                                                    SFunction<S, F> dtoField,
@@ -152,6 +169,18 @@ public interface QueryLabel<Children> {
         return selectAssociation(null, child, dtoField, collection);
     }
 
+    default <S, C, F> Children selectAssociation(SFunction<S, F> dtoField,
+                                                 MFunc<MybatisLabelFree.Builder<F>> collection) {
+        String dtoFieldName = LambdaUtils.getName(dtoField);
+        Class<S> dtoClass = LambdaUtils.getEntityClass(dtoField);
+        Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+        Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
+        MybatisLabelFree.Builder<F> builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), (Class<F>) field.getType());
+        MybatisLabelFree.Builder<F> cfBuilder = collection.apply(builder);
+        addLabel(cfBuilder.build());
+        return getChildren();
+    }
+
     default <S, C, F> Children selectAssociation(String prefix, Class<C> child, SFunction<S, F> dtoField,
                                                  MFunc<MybatisLabel.Builder<C, F>> collection) {
         String dtoFieldName = LambdaUtils.getName(dtoField);
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Label.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Label.java
new file mode 100644
index 0000000..df09c74
--- /dev/null
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Label.java
@@ -0,0 +1,16 @@
+package com.github.yulichang.wrapper.resultmap;
+
+import java.util.List;
+
+public interface Label<T> {
+
+    String getProperty();
+
+    Class<?> getJavaType();
+
+    Class<T> getOfType();
+
+    List<Result> getResultList();
+
+    List<?> getMybatisLabels();
+}
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabel.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabel.java
index e9152f6..8435dd0 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabel.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabel.java
@@ -22,7 +22,7 @@ import java.util.stream.Collectors;
  * @since 1.3.0
  */
 @Getter
-public class MybatisLabel<E, T> {
+public class MybatisLabel<E, T> implements Label<T> {
 
     private String index;
 
@@ -39,7 +39,7 @@ public class MybatisLabel<E, T> {
     /**
      * wrapper里面的引用
      */
-    private List<MybatisLabel<?, ?>> mybatisLabels;
+    private List<Label<?>> mybatisLabels;
 
     private MybatisLabel() {
     }
@@ -87,28 +87,28 @@ public class MybatisLabel<E, T> {
         }
 
         public Builder<E, T> id(SFunction<E, ?> entity, SFunction<T, ?> tag) {
-            Result.Builder<E, T> builder = new Result.Builder<>(true);
+            Result.Builder<T> builder = new Result.Builder<>(true, mybatisLabel.index);
             builder.column(entity).property(tag);
             mybatisLabel.resultList.add(builder.build());
             return this;
         }
 
         public Builder<E, T> id(SFunction<E, ?> entity) {
-            Result.Builder<E, T> builder = new Result.Builder<>(true);
+            Result.Builder<T> builder = new Result.Builder<>(true, mybatisLabel.index);
             builder.column(entity);
             mybatisLabel.resultList.add(builder.build());
             return this;
         }
 
         public Builder<E, T> result(SFunction<E, ?> entity, SFunction<T, ?> tag) {
-            Result.Builder<E, T> builder = new Result.Builder<>(false);
+            Result.Builder<T> builder = new Result.Builder<>(false, mybatisLabel.index);
             builder.column(entity).property(tag);
             mybatisLabel.resultList.add(builder.build());
             return this;
         }
 
         public Builder<E, T> result(SFunction<E, ?> entity) {
-            Result.Builder<E, T> builder = new Result.Builder<>(false);
+            Result.Builder<T> builder = new Result.Builder<>(false, mybatisLabel.index);
             builder.column(entity);
             mybatisLabel.resultList.add(builder.build());
             return this;
@@ -143,6 +143,22 @@ public class MybatisLabel<E, T> {
             return collection(null, entityClass, func, mFunc);
         }
 
+        /**
+         * 嵌套
+         */
+        public <A, R, B extends Collection<R>> Builder<E, T> collection(SFunction<T, B> func,
+                                                                        MFunc<MybatisLabelFree.Builder<R>> mFunc) {
+            String dtoFieldName = LambdaUtils.getName(func);
+            Class<T> dtoClass = LambdaUtils.getEntityClass(func);
+            Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+            //获取集合泛型
+            Class<?> genericType = MPJReflectionKit.getGenericType(field);
+            Class<R> ofType = (Class<R>) genericType;
+            MybatisLabelFree.Builder<R> builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), ofType);
+            mybatisLabel.mybatisLabels.add(mFunc.apply(builder).build());
+            return this;
+        }
+
         /**
          * 嵌套
          */
@@ -185,6 +201,20 @@ public class MybatisLabel<E, T> {
             return association(null, child, dtoField, collection);
         }
 
+        /**
+         * 嵌套
+         */
+        public <A, B> Builder<E, T> association(SFunction<T, B> dtoField,
+                                                MFunc<MybatisLabelFree.Builder<B>> collection) {
+            String dtoFieldName = LambdaUtils.getName(dtoField);
+            Class<T> dtoClass = LambdaUtils.getEntityClass(dtoField);
+            Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+            Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
+            MybatisLabelFree.Builder<B> builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), (Class<B>) field.getType());
+            mybatisLabel.mybatisLabels.add(collection.apply(builder).build());
+            return this;
+        }
+
         /**
          * 嵌套
          */
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabelFree.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabelFree.java
new file mode 100644
index 0000000..49bfeff
--- /dev/null
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/MybatisLabelFree.java
@@ -0,0 +1,245 @@
+package com.github.yulichang.wrapper.resultmap;
+
+import com.baomidou.mybatisplus.core.toolkit.Assert;
+import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
+import com.github.yulichang.toolkit.LambdaUtils;
+import com.github.yulichang.toolkit.MPJReflectionKit;
+import com.github.yulichang.toolkit.support.ColumnCache;
+import com.github.yulichang.wrapper.segments.SelectCache;
+import lombok.Getter;
+
+import java.lang.reflect.Field;
+import java.util.*;
+
+/**
+ * 无泛型约束 实现自由映射
+ *
+ * @author yulichang
+ * @since 1.4.4
+ */
+@Getter
+public class MybatisLabelFree<T> implements Label<T> {
+
+    private String property;
+
+    private Class<?> javaType;
+
+    private Class<T> ofType;
+
+    private List<Result> resultList;
+
+    /**
+     * wrapper里面的引用
+     */
+    private List<Label<?>> mybatisLabels;
+
+    private MybatisLabelFree() {
+    }
+
+    @SuppressWarnings({"unused", "unchecked", "DuplicatedCode"})
+    public static class Builder<T> {
+
+        private final MybatisLabelFree<T> mybatisLabel;
+
+        /**
+         * 手动构建
+         *
+         * @param property property
+         * @param javaType javaType
+         * @param ofType   映射类
+         */
+        public Builder(String property, Class<?> javaType, Class<T> ofType) {
+            this.mybatisLabel = new MybatisLabelFree<>();
+            mybatisLabel.property = property;
+            mybatisLabel.javaType = javaType;
+            mybatisLabel.ofType = ofType;
+            mybatisLabel.resultList = new ResultList();
+            mybatisLabel.mybatisLabels = new ArrayList<>();
+        }
+
+        public <E> Builder<T> all(Class<?> entityClass) {
+            allBuild(null, entityClass);
+            return this;
+        }
+
+        public <E> Builder<T> all(String prefix, Class<?> entityClass) {
+            allBuild(prefix, entityClass);
+            return this;
+        }
+
+        public <E> Builder<T> id(SFunction<E, ?> entity, SFunction<T, ?> tag) {
+            Result.Builder<T> builder = new Result.Builder<>(true, null);
+            builder.column(entity).property(tag);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> id(SFunction<E, ?> entity) {
+            Result.Builder<T> builder = new Result.Builder<>(true, null);
+            builder.column(entity);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> id(String index, SFunction<E, ?> entity, SFunction<T, ?> tag) {
+            Result.Builder<T> builder = new Result.Builder<>(true, index);
+            builder.column(entity).property(tag);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> id(String index, SFunction<E, ?> entity) {
+            Result.Builder<T> builder = new Result.Builder<>(true, index);
+            builder.column(entity);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> result(SFunction<E, ?> entity, SFunction<T, ?> tag) {
+            Result.Builder<T> builder = new Result.Builder<>(false, null);
+            builder.column(entity).property(tag);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> result(SFunction<E, ?> entity) {
+            Result.Builder<T> builder = new Result.Builder<>(false, null);
+            builder.column(entity);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> result(String index, SFunction<E, ?> entity, SFunction<T, ?> tag) {
+            Result.Builder<T> builder = new Result.Builder<>(false, index);
+            builder.column(entity).property(tag);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <E> Builder<T> result(String index, SFunction<E, ?> entity) {
+            Result.Builder<T> builder = new Result.Builder<>(false, index);
+            builder.column(entity);
+            mybatisLabel.resultList.add(builder.build());
+            return this;
+        }
+
+        public <A, R, B extends Collection<R>> Builder<T> collection(Class<A> entityClass, SFunction<T, B> func) {
+            return collection(null, entityClass, func);
+        }
+
+        /**
+         * 嵌套
+         */
+        public <A, R, B extends Collection<R>> Builder<T> collection(String prefix, Class<A> entityClass, SFunction<T, B> func) {
+            String dtoFieldName = LambdaUtils.getName(func);
+            Class<T> dtoClass = LambdaUtils.getEntityClass(func);
+            Map<String, Field> fieldMap = MPJReflectionKit.getFieldMap(dtoClass);
+            Field field = fieldMap.get(dtoFieldName);
+            Class<?> genericType = MPJReflectionKit.getGenericType(field);
+            MybatisLabel.Builder<A, R> builder;
+            if (genericType == null || genericType.isAssignableFrom(entityClass)) {
+                //找不到集合泛型 List List<?> List<Object> ， 直接查询数据库实体
+                builder = new MybatisLabel.Builder<>(prefix, dtoFieldName, entityClass, field.getType());
+            } else {
+                Class<R> ofType = (Class<R>) genericType;
+                builder = new MybatisLabel.Builder<>(prefix, dtoFieldName, entityClass, field.getType(), ofType, true);
+            }
+            mybatisLabel.mybatisLabels.add(builder.build());
+            return this;
+        }
+
+        public <A, R, B extends Collection<R>> Builder<T> collection(Class<A> entityClass, SFunction<T, B> func, MFunc<MybatisLabel.Builder<A, R>> mFunc) {
+            return collection(null, entityClass, func, mFunc);
+        }
+
+        public <A, R, B extends Collection<R>> Builder<T> collection(SFunction<T, B> func,
+                                                                     MFunc<MybatisLabelFree.Builder<R>> mFunc) {
+            String dtoFieldName = LambdaUtils.getName(func);
+            Class<T> dtoClass = LambdaUtils.getEntityClass(func);
+            Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+            //获取集合泛型
+            Class<?> genericType = MPJReflectionKit.getGenericType(field);
+            Class<R> ofType = (Class<R>) genericType;
+            MybatisLabelFree.Builder<R> builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), ofType);
+            mybatisLabel.mybatisLabels.add(mFunc.apply(builder).build());
+            return this;
+        }
+
+        /**
+         * 嵌套
+         */
+        public <A, R, B extends Collection<R>> Builder<T> collection(String prefix,
+                                                                     Class<A> entityClass,
+                                                                     SFunction<T, B> func,
+                                                                     MFunc<MybatisLabel.Builder<A, R>> mFunc) {
+            String dtoFieldName = LambdaUtils.getName(func);
+            Class<T> dtoClass = LambdaUtils.getEntityClass(func);
+            Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+            //获取集合泛型
+            Class<?> genericType = MPJReflectionKit.getGenericType(field);
+            Class<R> ofType = (Class<R>) genericType;
+            MybatisLabel.Builder<A, R> builder = new MybatisLabel.Builder<>(prefix, dtoFieldName, entityClass, field.getType(), ofType, false);
+            mybatisLabel.mybatisLabels.add(mFunc.apply(builder).build());
+            return this;
+        }
+
+        public <A, B> Builder<T> association(Class<A> child, SFunction<T, B> dtoField) {
+            return association(null, child, dtoField);
+        }
+
+        /**
+         * 嵌套
+         */
+        public <A, B> Builder<T> association(String index, Class<A> child, SFunction<T, B> dtoField) {
+            Class<T> dtoClass = LambdaUtils.getEntityClass(dtoField);
+            Map<String, Field> fieldMap = MPJReflectionKit.getFieldMap(dtoClass);
+            String dtoFieldName = LambdaUtils.getName(dtoField);
+            Field field = fieldMap.get(dtoFieldName);
+            Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
+            MybatisLabel.Builder<A, B> builder;
+            builder = new MybatisLabel.Builder<>(index, dtoFieldName, child, field.getType(), (Class<B>) field.getType(), true);
+            mybatisLabel.mybatisLabels.add(builder.build());
+            return this;
+        }
+
+        public <A, B> Builder<T> association(Class<A> child, SFunction<T, B> dtoField,
+                                             MFunc<MybatisLabel.Builder<A, B>> collection) {
+            return association(null, child, dtoField, collection);
+        }
+
+        /**
+         * 嵌套
+         */
+        public <A, B> Builder<T> association(String index, Class<A> child, SFunction<T, B> dtoField,
+                                             MFunc<MybatisLabel.Builder<A, B>> collection) {
+            String dtoFieldName = LambdaUtils.getName(dtoField);
+            Class<T> dtoClass = LambdaUtils.getEntityClass(dtoField);
+            Field field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
+            Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
+            MybatisLabel.Builder<A, B> builder = new MybatisLabel.Builder<>(index, dtoFieldName, child, field.getType(), (Class<B>) field.getType(), false);
+            mybatisLabel.mybatisLabels.add(collection.apply(builder).build());
+            return this;
+        }
+
+        public MybatisLabelFree<T> build() {
+            return mybatisLabel;
+        }
+
+        private void allBuild(String prefix, Class<?> entityClass) {
+            Map<String, Field> tagMap = MPJReflectionKit.getFieldMap(mybatisLabel.getOfType());
+            List<SelectCache> listField = ColumnCache.getListField(entityClass);
+            for (SelectCache s : listField) {
+                Field field = tagMap.get(s.getColumProperty());
+                if (Objects.nonNull(field)) {
+                    Result result = new Result();
+                    result.setIndex(prefix);
+                    result.setId(s.isPk());
+                    result.setJavaType(field.getType());
+                    result.setProperty(s.getColumProperty());
+                    result.setSelectNormal(s);
+                    mybatisLabel.resultList.add(result);
+                }
+            }
+        }
+    }
+}
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java
index fe0b66a..dd715b0 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/Result.java
@@ -40,21 +40,22 @@ public class Result {
 
 
     @SuppressWarnings({"UnusedReturnValue", "unused"})
-    public static class Builder<E, T> {
+    public static class Builder<T> {
 
         private final Result result;
 
-        public Builder(boolean isId) {
+        public Builder(boolean isId, String index) {
             this.result = new Result();
             result.isId = isId;
+            result.index = index;
         }
 
-        public Builder<E, T> property(SFunction<T, ?> property) {
+        public Builder<T> property(SFunction<T, ?> property) {
             result.property = LambdaUtils.getName(property);
             return this;
         }
 
-        public Builder<E, T> column(SFunction<E, ?> column) {
+        public <E> Builder<T> column(SFunction<E, ?> column) {
             Class<E> entityClass = LambdaUtils.getEntityClass(column);
             Map<String, SelectCache> normalMap = ColumnCache.getMapField(entityClass);
             String name = LambdaUtils.getName(column);
@@ -72,12 +73,12 @@ public class Result {
             return this;
         }
 
-        public Builder<E, T> javaType(Class<?> javaType) {
+        public Builder<T> javaType(Class<?> javaType) {
             result.javaType = javaType;
             return this;
         }
 
-        public Builder<E, T> jdbcType(JdbcType jdbcType) {
+        public Builder<T> jdbcType(JdbcType jdbcType) {
             result.jdbcType = jdbcType;
             return this;
         }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/ResultList.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/ResultList.java
new file mode 100644
index 0000000..c188d9c
--- /dev/null
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/resultmap/ResultList.java
@@ -0,0 +1,21 @@
+package com.github.yulichang.wrapper.resultmap;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+public class ResultList extends ArrayList<Result> {
+
+    private final Set<String> propertySet = new HashSet<>();
+
+
+    @Override
+    public boolean add(Result result) {
+        if (propertySet.contains(result.getProperty())) {
+            super.removeIf(i -> i.getProperty().equals(result.getProperty()));
+        } else {
+            propertySet.add(result.getProperty());
+        }
+        return super.add(result);
+    }
+}
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 5d64e28..714a82a 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
@@ -847,4 +847,29 @@ class LambdaWrapperTest {
         assert list.get(0).getAddressList() != null && list.get(0).getAddressList().get(0).getId() != null;
         list.forEach(System.out::println);
     }
+
+    @Test
+    void joinRandomMap() {
+        MPJLambdaWrapper<UserDO> wrapper = JoinWrappers.lambda(UserDO.class)
+                .logicDelToOn()
+                .selectAll(UserDO.class)
+//                .selectCollection(AddressDO.class, UserDTO::getAddressList, addr -> addr
+//                        .id(AddressDO::getId))
+                .selectCollection(UserDTO::getAddressList, addr -> addr
+                        .id(AddressDO::getId, AddressDTO::getId)
+                        .result(UserDO::getName, AddressDTO::getAddress)
+                        .collection(AddressDTO::getAreaList, map -> map
+                                .id(AreaDO::getId)
+                                .result(AreaDO::getArea, AreaDO::getArea)))
+                .leftJoin(AddressDO.class, AddressDO::getUserId, UserDO::getId)
+                .leftJoin(AreaDO.class, AreaDO::getId, AddressDO::getAreaId)
+                .le(UserDO::getId, 10000)
+                .orderByDesc(UserDO::getId);
+
+        List<UserDTO> list = wrapper.list(UserDTO.class);
+
+        System.out.println(list);
+        assert list.get(0).getAddressList() != null && list.get(0).getAddressList().get(0).getId() != null;
+        list.forEach(System.out::println);
+    }
 }