refactor(extension/crud): 重构查询树列表功能，增加重载方法，支持构建单个根节点或者多个根节点的树结构

continew-starter-extension/continew-starter-extension-crud/continew-starter-extension-crud-core/src/main/java/top/continew/starter/extension/crud/service/CrudService.java

@@ -59,15 +59,26 @@ public interface CrudService<L, D, Q, C> {
      */
     List<L> list(@Valid Q query, @Valid SortQuery sortQuery);
 
+    /**
+     * 查询树列表（多个根节点）
+     *
+     * @param query     查询条件
+     * @param sortQuery 排序查询条件
+     * @param isSimple  是否为简单树结构（不包含基本树结构之外的扩展字段，简单树（下拉列表）使用全局配置结构，复杂树（表格）使用 @TreeField 局部配置）
+     * @return 树列表信息
+     */
+    List<Tree<Long>> tree(@Valid Q query, @Valid SortQuery sortQuery, boolean isSimple);
+
     /**
      * 查询树列表
      *
      * @param query        查询条件
      * @param sortQuery    排序查询条件
-     * @param isSimple  是否为简单树结构（不包含基本树结构之外的扩展字段，简单树（下拉列表）使用全局配置结构，复杂树（表格）使用 @DictField 局部配置）
+     * @param isSimple     是否为简单树结构（不包含基本树结构之外的扩展字段，简单树（下拉列表）使用全局配置结构，复杂树（表格）使用 @TreeField 局部配置）
+     * @param isSingleRoot 是否为单个根节点
      * @return 树列表信息
      */
-    List<Tree<Long>> tree(@Valid Q query, @Valid SortQuery sortQuery, boolean isSimple);
+    List<Tree<Long>> tree(@Valid Q query, @Valid SortQuery sortQuery, boolean isSimple, boolean isSingleRoot);
 
     /**
      * 查询详情

continew-starter-extension/continew-starter-extension-crud/continew-starter-extension-crud-mf/src/main/java/top/continew/starter/extension/crud/service/CrudServiceImpl.java

@@ -27,15 +27,20 @@ import cn.hutool.core.util.ReflectUtil;
 import cn.hutool.extra.spring.SpringUtil;
 import com.mybatisflex.core.paginate.Page;
 import com.mybatisflex.core.query.QueryWrapper;
+import jakarta.el.MethodNotFoundException;
 import jakarta.servlet.http.HttpServletResponse;
 import org.springframework.data.domain.Sort;
+import org.springframework.lang.NonNull;
 import org.springframework.transaction.annotation.Transactional;
 import top.continew.starter.core.constant.StringConstants;
+import top.continew.starter.core.exception.BusinessException;
 import top.continew.starter.core.util.ReflectUtils;
+import top.continew.starter.core.util.TreeBuildUtils;
 import top.continew.starter.core.util.validation.ValidationUtils;
 import top.continew.starter.data.base.BaseMapper;
 import top.continew.starter.data.service.impl.ServiceImpl;
 import top.continew.starter.data.util.QueryWrapperHelper;
+import top.continew.starter.excel.util.ExcelUtils;
 import top.continew.starter.extension.crud.annotation.TreeField;
 import top.continew.starter.extension.crud.autoconfigure.CrudProperties;
 import top.continew.starter.extension.crud.autoconfigure.CrudTreeProperties;
@@ -44,12 +49,14 @@ import top.continew.starter.extension.crud.model.query.PageQuery;
 import top.continew.starter.extension.crud.model.query.SortQuery;
 import top.continew.starter.extension.crud.model.resp.LabelValueResp;
 import top.continew.starter.extension.crud.model.resp.PageResp;
-import top.continew.starter.excel.util.ExcelUtils;
 
+import java.lang.invoke.MethodHandleProxies;
+import java.lang.invoke.MethodHandles;
 import java.lang.reflect.Field;
-import java.util.ArrayList;
+import java.lang.reflect.Method;
 import java.util.List;
 import java.util.Optional;
+import java.util.function.Function;
 
 /**
  * CRUD 业务实现基类
@@ -89,9 +96,14 @@ public class CrudServiceImpl<M extends BaseMapper<T>, T extends BaseIdDO, L, D,
 
     @Override
     public List<Tree<Long>> tree(Q query, SortQuery sortQuery, boolean isSimple) {
+        return this.tree(query, sortQuery, true, false);
+    }
+
+    @Override
+    public List<Tree<Long>> tree(Q query, SortQuery sortQuery, boolean isSimple, boolean isSingleRoot) {
         List<L> list = this.list(query, sortQuery);
         if (CollUtil.isEmpty(list)) {
-            return new ArrayList<>(0);
+            return CollUtil.newArrayList();
         }
         CrudProperties crudProperties = SpringUtil.getBean(CrudProperties.class);
         CrudTreeProperties treeProperties = crudProperties.getTree();
@@ -106,8 +118,29 @@ public class CrudServiceImpl<M extends BaseMapper<T>, T extends BaseIdDO, L, D,
             treeNodeConfig = treeProperties.genTreeNodeConfig(treeField);
             rootId = treeField.rootId();
         }
-        // 构建树
+        if (isSingleRoot) {
-        return TreeUtil.build(list, rootId, treeNodeConfig, (node, tree) -> {
+            // 构建单根节点树
+            return TreeUtil.build(list, rootId, treeNodeConfig, (node,
+                                                                 tree) -> buildTreeField(isSimple, node, tree, treeField));
+        } else {
+            Function<L, Long> getId = createMethodReference(listClass, CharSequenceUtil.genGetter(treeField.value()));
+            Function<L, Long> getParentId = createMethodReference(listClass, CharSequenceUtil.genGetter(treeField
+                .parentIdKey()));
+            // 构建多根节点树
+            return TreeBuildUtils.buildMultiRoot(list, getId, getParentId, treeNodeConfig, (node,
+                                                                                            tree) -> buildTreeField(isSimple, node, tree, treeField));
+        }
+    }
+
+    /**
+     * 构建树字段
+     *
+     * @param isSimple  是否简单树结构
+     * @param node      节点
+     * @param tree      树
+     * @param treeField 树字段
+     */
+    private void buildTreeField(boolean isSimple, L node, Tree<Long> tree, TreeField treeField) {
         tree.setId(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.value())));
         tree.setParentId(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.parentIdKey())));
         tree.setName(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.nameKey())));
@@ -120,7 +153,53 @@ public class CrudServiceImpl<M extends BaseMapper<T>, T extends BaseIdDO, L, D,
             fieldList.forEach(f -> tree.putExtra(f.getName(), ReflectUtil.invoke(node, CharSequenceUtil.genGetter(f
                 .getName()))));
         }
-        });
+    }
+
+    /**
+     * 通过反射创建方法引用，支持在父类中查找方法
+     *
+     * @param clazz      实体类类型
+     * @param methodName 方法名
+     * @param <T>        实体类类型
+     * @param <K>        返回值类型
+     * @return Function<T, K> 方法引用
+     * @throws IllegalArgumentException 如果参数不合法
+     * @throws MethodNotFoundException  如果在类层次结构中找不到指定方法
+     */
+    @SuppressWarnings("unchecked")
+    public static <T, K> Function<T, K> createMethodReference(@NonNull Class<T> clazz, @NonNull String methodName) {
+        Method method = getMethod(clazz, methodName);
+        try {
+            // 设置访问权限并返回方法引用
+            method.setAccessible(true);
+            return MethodHandleProxies.asInterfaceInstance(Function.class, MethodHandles.lookup().unreflect(method));
+        } catch (Exception e) {
+            throw new BusinessException("创建方法引用失败: " + clazz.getName() + "." + methodName, e);
+        }
+    }
+
+    /**
+     * 获取方法（包括父类）
+     *
+     * @param clazz      实体类
+     * @param methodName 方法名
+     * @param <T>        实体类
+     * @return 方法
+     */
+    private static <T> Method getMethod(Class<T> clazz, String methodName) {
+        Class<?> currentClass = clazz;
+        Method method = null;
+        // 查找方法（包括父类）
+        while (currentClass != null) {
+            try {
+                method = currentClass.getDeclaredMethod(methodName);
+                break;
+            } catch (NoSuchMethodException e) {
+                // 继续查找父类
+                currentClass = currentClass.getSuperclass();
+            }
+        }
+        return method;
     }
 
     @Override

continew-starter-extension/continew-starter-extension-crud/continew-starter-extension-crud-mp/src/main/java/top/continew/starter/extension/crud/service/CrudServiceImpl.java

@@ -22,6 +22,7 @@ import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.convert.Convert;
 import cn.hutool.core.lang.tree.Tree;
 import cn.hutool.core.lang.tree.TreeNodeConfig;
+import cn.hutool.core.lang.tree.TreeUtil;
 import cn.hutool.core.map.MapUtil;
 import cn.hutool.core.text.CharSequenceUtil;
 import cn.hutool.core.util.ReflectUtil;
@@ -29,10 +30,13 @@ import cn.hutool.extra.spring.SpringUtil;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import jakarta.el.MethodNotFoundException;
 import jakarta.servlet.http.HttpServletResponse;
 import org.springframework.data.domain.Sort;
+import org.springframework.lang.NonNull;
 import org.springframework.transaction.annotation.Transactional;
 import top.continew.starter.core.constant.StringConstants;
+import top.continew.starter.core.exception.BusinessException;
 import top.continew.starter.core.util.ClassUtils;
 import top.continew.starter.core.util.ReflectUtils;
 import top.continew.starter.core.util.TreeBuildUtils;
@@ -97,25 +101,53 @@ public class CrudServiceImpl<M extends BaseMapper<T>, T extends BaseIdDO, L, D,
 
     @Override
     public List<Tree<Long>> tree(Q query, SortQuery sortQuery, boolean isSimple) {
+        return this.tree(query, sortQuery, true, false);
+    }
+
+    @Override
+    public List<Tree<Long>> tree(Q query, SortQuery sortQuery, boolean isSimple, boolean isSingleRoot) {
         List<L> list = this.list(query, sortQuery);
         if (CollUtil.isEmpty(list)) {
-            return new ArrayList<>(0);
+            return CollUtil.newArrayList();
         }
         CrudProperties crudProperties = SpringUtil.getBean(CrudProperties.class);
         CrudTreeProperties treeProperties = crudProperties.getTree();
         TreeField treeField = listClass.getDeclaredAnnotation(TreeField.class);
+        TreeNodeConfig treeNodeConfig;
+        Long rootId;
         // 简单树（下拉列表）使用全局配置结构，复杂树（表格）使用局部配置
-        TreeNodeConfig treeNodeConfig = isSimple
+        if (isSimple) {
-            ? treeProperties.genTreeNodeConfig()
+            treeNodeConfig = treeProperties.genTreeNodeConfig();
-            : treeProperties.genTreeNodeConfig(treeField);
+            rootId = treeProperties.getRootId();
-        String valueGetter = CharSequenceUtil.genGetter(treeField.value());
+        } else {
-        String parentIdKeyGetter = CharSequenceUtil.genGetter(treeField.parentIdKey());
+            treeNodeConfig = treeProperties.genTreeNodeConfig(treeField);
-        Function<L, Long> getId = createMethodReference(listClass, valueGetter);
+            rootId = treeField.rootId();
-        Function<L, Long> getParentId = createMethodReference(listClass, parentIdKeyGetter);
+        }
-        // 构建树
+        if (isSingleRoot) {
-        return TreeBuildUtils.buildMultiRoot(list, getId, getParentId, treeNodeConfig, (node, tree) -> {
+            // 构建单根节点树
-            tree.setId(ReflectUtil.invoke(node, valueGetter));
+            return TreeUtil.build(list, rootId, treeNodeConfig, (node,
-            tree.setParentId(ReflectUtil.invoke(node, parentIdKeyGetter));
+                                                                 tree) -> buildTreeField(isSimple, node, tree, treeField));
+        } else {
+            Function<L, Long> getId = createMethodReference(listClass, CharSequenceUtil.genGetter(treeField.value()));
+            Function<L, Long> getParentId = createMethodReference(listClass, CharSequenceUtil.genGetter(treeField
+                .parentIdKey()));
+            // 构建多根节点树
+            return TreeBuildUtils.buildMultiRoot(list, getId, getParentId, treeNodeConfig, (node,
+                                                                                            tree) -> buildTreeField(isSimple, node, tree, treeField));
+        }
+    }
+
+    /**
+     * 构建树字段
+     *
+     * @param isSimple  是否简单树结构
+     * @param node      节点
+     * @param tree      树
+     * @param treeField 树字段
+     */
+    private void buildTreeField(boolean isSimple, L node, Tree<Long> tree, TreeField treeField) {
+        tree.setId(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.value())));
+        tree.setParentId(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.parentIdKey())));
         tree.setName(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.nameKey())));
         tree.setWeight(ReflectUtil.invoke(node, CharSequenceUtil.genGetter(treeField.weightKey())));
         // 如果构建简单树结构，则不包含扩展字段
@@ -126,29 +158,54 @@ public class CrudServiceImpl<M extends BaseMapper<T>, T extends BaseIdDO, L, D,
             fieldList.forEach(f -> tree.putExtra(f.getName(), ReflectUtil.invoke(node, CharSequenceUtil.genGetter(f
                 .getName()))));
         }
-        });
     }
 
     /**
-     * 通过反射创建方法引用
+     * 通过反射创建方法引用，支持在父类中查找方法
      *
      * @param clazz      实体类类型
      * @param methodName 方法名
      * @param <T>        实体类类型
      * @param <K>        返回值类型
      * @return Function<T, K> 方法引用
+     * @throws IllegalArgumentException 如果参数不合法
+     * @throws MethodNotFoundException  如果在类层次结构中找不到指定方法
      */
     @SuppressWarnings("unchecked")
-    public static <T, K> Function<T, K> createMethodReference(Class<T> clazz, String methodName) {
+    public static <T, K> Function<T, K> createMethodReference(@NonNull Class<T> clazz, @NonNull String methodName) {
         try {
-            Method method = clazz.getDeclaredMethod(methodName);
+            Method method = getMethod(clazz, methodName);
             method.setAccessible(true);
             return MethodHandleProxies.asInterfaceInstance(Function.class, MethodHandles.lookup().unreflect(method));
         } catch (Exception e) {
-            throw new RuntimeException("Failed to create method reference for " + methodName, e);
+            throw new BusinessException("创建方法引用失败：" + clazz.getName() + StringConstants.DOT + methodName, e);
         }
     }
 
+    /**
+     * 获取方法（包括父类）
+     *
+     * @param clazz      实体类
+     * @param methodName 方法名
+     * @param <T>        实体类
+     * @return 方法
+     */
+    private static <T> Method getMethod(Class<T> clazz, String methodName) {
+        Class<?> currentClass = clazz;
+        Method method = null;
+        // 查找方法（包括父类）
+        while (currentClass != null) {
+            try {
+                method = currentClass.getDeclaredMethod(methodName);
+                break;
+            } catch (NoSuchMethodException e) {
+                // 继续查找父类
+                currentClass = currentClass.getSuperclass();
+            }
+        }
+        return method;
+    }
+
     @Override
     public D get(Long id) {
         T entity = super.getById(id, false);